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Home My WebLink About20231501.tiffREVISED MEMORANDUM TO: Kim Ogle, Planning Services FROM: Melissa J King, PE, Development Review DATE: March 16, 2023 SUBJECT: USR22-0018 Loveland Ready -Mix Concrete Inc. The proposal has been reviewed on behalf of the Weld County Department of Public Works and the Department of Planning and Zoning. Staff comments made during this phase of the application process may not be all-inclusive, as other issues may arise during the remaining application process. COMMENTS GENERAL PROJECT INFORMATION/LOCATION Project description: A Site Specific Development Plan and Use by Special Review Permit for Open Mining (sand, gravel and stone) and processing of minerals, employee and equipment associated with operations parking, outside of subdivisions and historic townsites, in the A (Agricultural) Zone District. This project is north of and adjacent to CR 48.5 and is west of and adjacent to State Highway 257. Parcel numbers: 105903000027, 095734000030, 105903000045. Access onto CR 48.5. ACCESS Development Review has reviewed the application materials related to access. The application materials request that the access is onto CR 48.5 approximately 1,900 feet west of the intersection of CR 48.5 and State Highway 257. The applicant shall obtain an access permit for a location that meets the Minimum Access Spacing Criteria. Additionally, CDOT requires an access permit for the traffic that will use SH 257. The Colorado Department of Transportation (CDOT) has jurisdiction over all accesses to state highways. Please contact Mr. Tim Bilobran at the Greeley office (970-350-2163). Per Sec. 8-14-30, an Access Permit is required for access to Weld County maintained roadways. We strongly encourage you to discuss your access location with Development Review prior to laying out your site plan. All "preliminarily approved" accesses are subject to change during the access permitting process. Minimum access spacing widths and safe sight distances are shown in Weld County Code Chapter 8. Please refer to Chapter 8 of the Weld County Code for more information regarding access. ROADS AND RIGHTS -OF -WAY AND BRIDGES CR 48.5 is a gravel road and is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as a local road, which requires 60 feet of right-of-way. The applicant shall delineate and label on the site map or plat the future and existing right-of-way (along with the documents creating the existing right-of-way) and the physical location of the road. If the right-of-way cannot be verified it shall be dedicated. Pursuant to the definition of setback in the Weld County Code, Sec. 23-1- 90, the required setback is measured from the future right-of-way line. Be aware that physical roadways may not be centered in the right-of-way. The eastern 1.5 -mile portion of this road is maintained by Weld County. The property is bounded by State Highway 257. Contact the Colorado Department of Transportation (CDOT) to determine what right-of-way shall be shown on the submitted plat. Reference the documents creating the right-of-way. Please contact Tim Bilobran at the Greeley office, phone number: 970-350-2163. Per, Sec. 8-13-30.B, a Weld County Right -of -Way Use Permit is required for any project that will be occupying, constructing or excavating facilities within, and/or encroaching upon, any County rights -of -way or easement. Right -of -Way Use Permit instructions and application can be found at https://www.weldgov.com/departments/publicworks/permits/. Per Sec 8-15-20 et seq, a Weld County Transport Permit is required for Extra -legal vehicles using Weld County roadways to ensure the operation and movement of Extra -legal Vehicles and Loads occur in a safe and efficient manner. Applicants can be found at: https://www.weld.gov/Government/Departments/Public-Works/Permits . Weld County will not replace overlapping easements located within existing right-of-way or pay to relocate existing utilities within the County right-of-way. TRAFFIC A Traffic Impact Study, stamped and signed by a professional engineer licensed in the State of Colorado was submitted. The Study identified two potential haul routes: • CR 48.5 west to CR 17, north to CR 54, west to CR 13, and south to Loveland Ready -Mix Concrete processing plant. OR • CR 48.5 east to SH 257, north to CR 54, west to CR 13, and south to Loveland Ready -Mix Concrete processing plant. Recent traffic counts (2020) on the County's portion of CR 48.5 counted 210 (AADT) vehicles per day with 17% trucks. The 85th percentile speed is 54 miles per hour. Recent traffic counts (2021) on this portion of CR 17 counted 4,552 (AADT) vehicles per day with 7% trucks. The 85th percentile speed is 54 miles per hour. Recent traffic counts (2019) on this portion of CR 54 counted 5,876 (AADT) vehicles per day with 12% trucks. The 85th percentile speed is 59 miles per hour. Recent traffic counts on this portion of SH 257 counted 10,100 vehicles per day. The proposed haul route to the west on CR 48.5 involves the intersection of CR 48.5 and CR 17. Approximately 0.5 miles of CR 48.5 and the southern portion of the intersection of CR 48.5 and CR 17 are in the Town of Johnstown. Additionally, 60 feet to the east of the centerline of CR 17 is the Great Western Railroad. The residential nature of this area is a concern and would be addressed by the referral request to the Town of Johnstown. The configuration of the intersection of CR 48.5 and CR 17 does not meet the safety criteria as specified in Chapter 8 of the Code. Specifically, the location of the railroad track does not allow for the needed auxiliary lanes that would be required for the proposed haul traffic from this mine; the queuing of trucks at this intersection would be adversely impacted by the proximity of the railroad track; the intersection has numerous utilities that would need relocated; and the intersection sight distance does not appear to be adequate for turning haul trucks. Development Review is not recommending the use of this haul route. Per CDOT's referral, the proposed haul route to the east on CR 48.5 would involve the upgrade of the intersection of SH 257 (i.e. southbound deceleration and north bound acceleration lanes) and CR 48.5 prior to the issuance of the CDOT access permit onto SH 257 and the triggered upgrade of the intersection of CR 54 and SH 257 in the future. Development Review is recommending the use of this haul route. TRACKING CONTROL Tracking control is required to prevent tracking from the site onto public roadways. For access to paved roads, tracking control devices can be double cattle guards with 100 ft. of asphalt or 300 ft of asphalt. For access to gravel roads, tracking control devices must be either double cattle guards with 100 ft. of road base, or road base on all driving surfaces. Temporary Tracking Control shall be used during construction unless permanent tracking control is installed ahead of construction activities. Recycled concrete is not allowed in County right-of-way. Tracking control for unmaintained public right-of-way is required just prior to entering publicly maintained roadways. A variance request for alternatives to the tracking control requirement can be submitted to Development Review for review and consideration. This site requires double cattle guards and 100 ft. of asphalt or 300 ft. of asphalt. IMPROVEMENTS AND ROAD MAINTENANCE AGREEMENT WITH UP -FRONT IMPROVEMENTS Development Review is requesting an Improvements and Road Maintenance Agreement for dust control, damage repairs to specified haul routes, triggered off -site improvements and up -front off -site improvements. Consideration may be given to proportional sharing of cost for these improvements. Based on the haul route recommended by Development Review, these improvements may include but are not limited to: • Paving CR 48.5 from the site access east through the intersection with SH 257; • The addition of auxiliary lanes (i.e. acceleration lane to the north and deceleration lane to the south) at the intersection of CR 48.5 and SH 257; • Triggered auxiliary lanes at the intersection of SH 257 and CR 54; and, • A proportional share of the improvements to the intersection of CR 54 and CR 13 that may include dedicated right-of-way. In the case that right-of-way is dedicated, the applicant may consider a Capital Contribution Front End Agreement. See Weld County Code Sec, 20-1-90 for more information. Improvements/Road Maintenance Agreement: An example agreement is available on the Weld County/Development Review website. It will detail the approved haul route, outline the required up -front off -site improvements, designate when other off -site improvements will be triggered, and include a maintenance agreement for the haul route. DRAINAGE REQUIREMENTS This area IS within an Urbanizing Drainage Area: Urbanizing Drainage Areas typically require detention of runoff from the 1 -hour, 100 -year, storm falling on the developed site and release of the detained water at the historic runoff rate of the 1 -hour, 5 -year storm falling on the undeveloped site for URBANIZING areas. Drainage Narrative: The applicant has submitted a preliminary drainage narrative. A final drainage narrative citing an acceptable drainage detention exception, from Sec 8-11-40 of the Code, with adequate documentation shall be submitted. Historic Flows: The applicants will be required to maintain the historic drainage flows and run-off amounts that exist from the property. GRADING PERMIT A Weld County Grading Permit will be required if disturbing more than 1 acre. A Construction Stormwater Permit is also required with the State for disturbing more than 1 acre. Contact: Colorado Department of Public Health and Environment, Water Quality Control Division, 303-692-3575. If more than 1 acre is to be disturbed for construction of non -gravel pit items such as structures, parking lots, laydown yards etc, a Weld County grading permit will be required prior to the start of construction. Grading Permit applications are accepted after the planning process is complete (plan recorded). An Early Release Request Form may be entertained only after the applicant, Planning Department have reviewed the referral and surrounding property owner comments. The Early Release Request may or may not be granted depending on referral comments and surrounding property owner concerns. Contact an Engineering representative from the Development Review for more information. CONDITIONS OF APPROVAL A. An Improvements and Road Maintenance Agreement is required for upfront and triggered off -site improvements at this location. The improvements include but are not limited to: • Paving CR 48.5 from the site access east through the intersection with SH 257; • The addition of auxiliary lanes (i.e. acceleration lane to the north and deceleration lane to the south) at the intersection of CR 48.5 and SH 257; • Triggered auxiliary lanes at the intersection of SH 257 and CR 54; and, • A proportional share of the improvements to the intersection of CR 54 and CR 13 may include dedicated right-of-way. In the case that right-of-way is dedicated, the applicant may consider a Capital Contribution Front End Agreement. See Weld County Code Sec, 20-1-90 for more information. Road maintenance includes, but is not limited to, dust control and damage repair to specified haul route. The Agreement shall include provisions addressing engineering requirements, submission of collateral, and testing and approval of completed improvements. (Development Review) B. A Final Drainage Narrative is required. (Development Review) C. The plan shall be amended to delineate the following: 1. The County -maintained portion of CR 48.5 is a gravel road and is designated on the Weld County Functional Classification Map as a local road which requires 60 feet of right-of-way at full buildout. The applicant shall delineate and label on the site map or plat the future and existing right-of-way (along with the documents creating the existing right-of-way) and the physical location of the road. All setbacks shall be measured from the edge of right-of-way. This road is maintained by Weld County. (Development Review) 2. Show the Colorado Department of Transportation (CDOT) right-of-way for Hwy 257 on the plat along with the documents creating the right-of-way. (Development Review) 3. Show and label the access location onto CR 48.5, approved access width, and the appropriate turning radii on the site plan. Specify the access type. (Development Review) 4. Show and label the required tracking control. (Development Review) 5. Show and label the entrance gate if applicable. An access approach that is gated shall be designed so that the longest vehicle (including trailers) using the access can completely clear the traveled way when the gate is closed. In no event, shall the distance from the gate to the edge of the traveled surface be less than 35 feet. (Development Review) 6. Show and label the drainage flow arrows. (Development Review) 7. Show and label the parking and traffic circulation flow arrows showing how the traffic moves around the property. (Development Review) DEVELOPMENT STANDARDS (NOTES ON THE SITE PLAN) 1. The property owner or operator shall be responsible for controlling noxious weeds on the site, pursuant to Chapter 15, Article I and II, of the Weld County Code. (Development Review) 2. The access to the site shall be maintained to mitigate any impacts to the public road, including damages and/or off -site tracking. (Development Review) 3. Weld County will not replace overlapping easements located within existing right-of-way or pay to relocate existing utilities within the existing County right-of-way. (Development Review) 4. Any work that may occupy and or encroach upon any County rights -of -way or easement shall acquire an approved Right -of -Way Use Permit prior to commencement. (Development Review) 5. Prior to the release of building permits, the applicant shall be required to submit a complete access application for a "preliminarily approved" access location as shown on this plat. (Development Review) 6. There shall be no parking or staging of vehicles on public roads. On -site parking shall be utilized. (Development Review) 7. The historical flow patterns and runoff amounts on the site will be maintained. (Development Review) MEMORANDUM TO: Kim Ogle, Planning Services FROM: Melissa J King, PE, Development Review DATE: July 22, 2022 SUBJECT: USR22-0018 Loveland Ready -Mix Concrete Inc. The proposal has been reviewed on behalf of the Weld County Department of Public Works and the Department of Planning and Zoning. Staff comments made during this phase of the application process may not be all-inclusive, as other issues may arise during the remaining application process. COMMENTS GENERAL PROJECT INFORMATION/LOCATION Project description: A Site Specific Development Plan and Use by Special Review Permit for Open Mining (sand, gravel and stone) and processing of minerals, employee and equipment associated with operations parking, outside of subdivisions and historic townsites, in the A (Agricultural) Zone District. This project is north of and adjacent to CR 48.5 and is west of and adjacent to State Highway 257. Parcel numbers: 105903000027, 095734000030, 105903000045. Access onto CR 48.5. ACCESS Development Review has reviewed the application materials related to access. The application materials request that the access is onto CR 48.5 approximately 1,900 feet west of the intersection of CR 48.5 and State Highway 257. This is an existing unpermitted access onto CR 48.5. The applicant shall obtain an access permit for a location that meets the Minimum Access Spacing Criteria. Per Sec. 8-14-30, an Access Permit is required for access to Weld County maintained roadways. We strongly encourage you to discuss your access location with Development Review prior to laying out your site plan. All "preliminarily approved" accesses are subject to change during the access permitting process. Per Sec. 24-8-40, when feasible, there shall be no net increase in the number of accesses to a public road. Minimum access spacing widths are shown in Weld County Code Sec. 8-14-30. Please refer to Chapter 8 of the Weld County Code for more information regarding access. ROADS AND RIGHTS -OF -WAY AND BRIDGES CR 48.5 is a gravel road and is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as a local road, which requires 60 feet of right-of-way. The applicant shall delineate and label on the site map or plat the future and existing right-of-way (along with the documents creating the existing right-of-way) and the physical location of the road. If the right-of-way cannot be verified it shall be dedicated. Pursuant to the definition of setback in the Weld County Code, Sec. 23-1- 90, the required setback is measured from the future right-of-way line. Be aware that physical roadways may not be centered in the right-of-way. The eastern 1.5 -mile portion of this road is maintained by Weld County. The western 0.5 -mile portion of County Road 48.5 is under the jurisdiction of the Town of Johnstown. This portion is paved. The municipality has jurisdiction over use of the road. Please contact the municipality to verify any additional requirements that may be needed. It is noted that the intersection of the GWR Railroad line, CR 48.5, and CR 17 are under the jurisdiction of the Town of Johnstown. In addition to CR 48.5, the haul route also includes CR 17 that is a paved arterial roadway per the Weld County Functional Classification map, CR 50 that is a paved collector roadway per the Weld County Classification Map, and CR 13 (also known as Colorado Blvd) that is a paved arterial roadway per the Weld County Classification Map. The proposed haul route includes four bridge crossings: one on CR 48.5 (Thompson and Platte Ditch), two on CR 50 (Little Thompson Annex and Unnamed), and one on CR 13 (Hollsboro Ditch). The property is bounded by State Highway 257. Contact the Colorado Department of Transportation (CDOT) to determine what right-of-way shall be shown on the submitted plat. Reference the documents creating the right-of-way. Please contact Tim Bilobran at the Greeley office, phone number: 970-350-2163. Hwy 257 is not included has a truck haul route but may be used by the 6 employees. Per, Sec. 8-13-30.B, a Weld County Right -of -Way Use Permit is required for any project that will be occupying, constructing or excavating facilities within, and/or encroaching upon, any County rights -of -way or easement. Right -of -Way Use Permit instructions and application can be found at https://www.weldgov.com/departments/publicworks/permits/. Weld County will not replace overlapping easements located within existing right-of-way or pay to relocate existing utilities within the County right-of-way. TRAFFIC Recent traffic counts (2020) on the County's portion of CR 48.5 counted 210 (AADT) vehicles per day with 17% trucks. The 85th percentile speed is 54 miles per hour. Recent traffic counts (2021) on this portion of CR 17 counted 4,552 (AADT) vehicles per day with 7% trucks. The 85th percentile speed is 54 miles per hour. Recent traffic counts (2021) on this portion of CR 50 counted 3,085 (AADT) vehicles per day with 10% trucks. The 85th percentile speed is 59 miles per hour. Recent traffic counts (2020) on this portion of CR13 counted 2,667 (AADT) vehicles per day with 22% trucks. The 85th percentile speed is 59 miles per hour. A preliminary Traffic Impact Study was submitted with the application. A final Traffic Impact Study, stamped and signed by a professional engineer licensed in the State of Colorado shall be submitted. TRACKING CONTROL Tracking control is required to prevent tracking from the site onto public roadways. For access to paved roads, tracking control devices can be double cattle guards with 100 ft. of asphalt or 300 ft of asphalt. For access to gravel roads, tracking control devices must be either double cattle guards with 100 ft. of road base, or road base on all driving surfaces. Temporary Tracking Control shall be used during construction unless permanent tracking control is installed ahead of construction activities. Recycled concrete is not allowed in County right-of-way. Tracking control for unmaintained public right-of-way is required just prior to entering publicly maintained roadways. A variance request for alternatives to the tracking control requirement can be submitted to Development Review for review and consideration. This site requires double cattle guards and 100 ft. of asphalt or 300 ft. of asphalt. IMPROVEMENTS AND ROAD MAINTENANCE AGREEMENT WITH UP -FRONT IMPROVEMENTS Public Works is requesting an Improvements and Road Maintenance Agreement for dust control, damage repairs to specified haul routes, triggered off -site improvements and up -front off -site improvements. Consideration may be given to proportional sharing of cost for these improvements. These improvements may include but are not limited to: • Paving county -maintained CR 48.5 from the site access west, • Upgrade of CR 17 as it relates to the improvements associated with CR 17 and CR 48.5 intersection, • Upgrade of the intersection of CR 17 at CR 50, • Upgrade of intersection of CR 50 at CR 13, and • Upgrade of the bridges traversed on the haul route. Improvements/Road Maintenance Agreement: An example agreement is available on the Weld County/Development Review website. It will detail the approved haul route, outline the required up -front off -site improvements, designate when other off -site improvements will be triggered, and include a maintenance agreement for the haul route. DRAINAGE REQUIREMENTS This area IS within an Urbanizing Drainage Area: Urbanizing Drainage Areas typically require detention of runoff from the 1 -hour, 100 -year, storm falling on the developed site and release of the detained water at the historic runoff rate of the 1 -hour, 5 -year storm falling on the undeveloped site for URBANIZING areas. Drainage Narrative: The applicant has submitted a preliminary drainage narrative. A final drainage narrative citing an acceptable drainage detention exception, from Sec 8-11-40 of the Code, with adequate documentation shall be submitted. Historic Flows: The applicants will be required to maintain the historic drainage flows and run-off amounts that exist from the property. GRADING PERMIT A Weld County Grading Permit will be required if disturbing more than 1 acre. A Construction Stormwater Permit is also required with the State for disturbing more than 1 acre. Contact: Colorado Department of Public Health and Environment, Water Quality Control Division, 303-692-3575. If more than 1 acre is to be disturbed for construction of non -gravel pit items such as structures, parking lots, laydown yards etc, a Weld County grading permit will be required prior to the start of construction. Grading Permit applications are accepted after the planning process is complete (plan recorded). An Early Release Request Form may be entertained only after the applicant, Public Works and Planning Department have reviewed the referral and surrounding property owner comments. The Early Release Request may or may not be granted depending on referral comments and surrounding property owner concerns. Contact an Engineering representative from the Public Works for more information. CONDITIONS OF APPROVAL A. An Improvements and Road Maintenance Agreement is required for off -site improvements at this location. Road maintenance includes, but is not limited to, dust control and damage repair to specified haul routes. The Agreement shall include provisions addressing engineering requirements, submission of collateral, and testing and approval of completed improvements. (Development Review) B. A Final Drainage Narrative is required. (Development Review) C. A Final Traffic Impact Study, signed and stamped by a professional engineer in the State of Colorado, is required. (Development Review) D. The plan shall be amended to delineate the following: 1. The County -maintained portion of CR 48.5 is a gravel road and is designated on the Weld County Functional Classification Map as a local road which requires 60 feet of right-of-way at full buildout. The applicant shall delineate and label on the site map or plat the future and existing right-of-way (along with the documents creating the existing right-of-way) and the physical location of the road. All setbacks shall be measured from the edge of right-of-way. This road is maintained by Weld County. (Development Review) 2. Show the Colorado Department of Transportation (CDOT) right-of-way for Hwy 257 on the plat along with the documents creating the right-of-way. (Development Review) 3. Show and label the access location onto CR 48.5, approved access width, and the appropriate turning radii on the site plan. Specify the access type. (Development Review) 4. Show and label the required tracking control. (Development Review) 5. Show and label the entrance gate if applicable. An access approach that is gated shall be designed so that the longest vehicle (including trailers) using the access can completely clear the traveled way when the gate is closed. In no event, shall the distance from the gate to the edge of the traveled surface be less than 35 feet. (Development Review) 6. Show and label the drainage flow arrows. (Development Review) 7. Show and label the parking and traffic circulation flow arrows showing how the traffic moves around the property. (Development Review) DEVELOPMENT STANDARDS (NOTES ON THE SITE PLAN) 1. The property owner or operator shall be responsible for controlling noxious weeds on the site, pursuant to Chapter 15, Article I and II, of the Weld County Code. (Development Review) 2. The access to the site shall be maintained to mitigate any impacts to the public road, including damages and/or off -site tracking. (Development Review) 3. Weld County will not replace overlapping easements located within existing right-of-way or pay to relocate existing utilities within the existing County right-of-way. (Development Review) 4. Any work that may occupy and or encroach upon any County rights -of -way or easement shall acquire an approved Right -of -Way Use Permit prior to commencement. (Development Review) 5. Prior to the release of building permits, the applicant shall be required to submit a complete access application for a "preliminarily approved" access location as shown on this plat. (Development Review) 6. There shall be no parking or staging of vehicles on public roads. On -site parking shall be utilized. (Development Review) 7. The historical flow patterns and runoff amounts on the site will be maintained. (Development Review) TELESTO SOLUTIONS* INCORPORATED September 27, 2022 Via Electronic Mail Kim Ogle Weld County Planning Department 1555 North 17t" Avenue Greeley, Colorado 80631 Subject: Loveland Ready -Mix USR22-0018 Weld County Public Works and Department of Planning and Zoning Referral Response Dear Mr. Ogle: Loveland Ready -Mix Concrete, Inc. (LRM) received the letter dated July 22, 2022, from Melissa J King of Weld County Department of Public Works and the Department of Planning and Zoning. This letter serves as LRM's response to Department of Planning Public Works and the Department of Planning and Zoning's comments and recommendations. The County's comments are provided in italics, followed by LRM's response. Access Comment The application materials request that the access is onto CR 48.5 approximately 1,900 feet west of the intersection of CR 48.5 and State Highway 257. This is an existing unpermitted access onto CR 48.5. The applicant shall obtain an access permit for a location that meets the Minimum Access Spacing Criteria. Per Sec. 8-14-30, an Access Permit is required for access to Weld County maintained roadways. We strongly encourage you to discuss your access location with Development Review prior to laying out your site plan. All "preliminarily approved" accesses are subject to change during the access permitting process. Per Sec. 24-8-=10, when feasible, there shall be no net increase in the number of accesses to a public road. Minimum access spacing widths are shown in Weld County Code Sec. 8-14-30. Please refer to Chapter 8 of the Weld County Code for more information regarding access. LR111 Response The proposed access onto CR 48.5, approximately 1,305 feet west of the intersection of CR 48.5 and SH 257, is proposed and not existing. There is an existing agricultural access, Colorado Office (Corporate) New Mexico Office 750 14th Street SW Loveland, Colorado 80537 970-484-7704 / 970-484-7789 (FAX) 1303 Pope Street Silver City, New Mexico 88061 575-538-5620 / 575-538-5625 (FAX) To: Mr. Kim Ogle Date: September 27, 2022 Page 2 that is also used to service existing oil and gas facilities, onto CR 48.5, approximately 473 feet west of the proposed intersection. LRM is not requesting use of the existing access for mining. LRM submitted an access permit application to Weld County on September 8, 2021. LRM then submitted additional photos of the proposed access location on September 23, 2021, per the request of Weld County. LRM then submitted a new figure with a 65' turning radii on December 16, 2021, per the request of Weld County. The email correspondence is attached to this letter as Attachment 1. On September 13, 2022, Telesto/LRM asked for a revision to reflect a 28' wide drive instead of a 14' wide drive. It is our understanding that Weld County cannot issue the access permit until the USR application was submitted by LRM. The proposed access meets the minimum access spacing criteria in Weld County Code Sec. 8-14-30. Roads and Rights -of -Way and Bridges Comment CR 48.5 is a gravel road and is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as a local road, which requires 60 feet of right-of-way. The applicant shall delineate and label on the site map or plat the future and existing right- of-way (along with the documents creating the existing right-of-way) and the physical location of the road. If the right-of-way cannot be verified it shall be dedicated. Pursuant to the definition of setback in the Weld County Code, Sec. 23-1- 90, the required setback is measured from the future right-of-way line. Be aware that physical roadways may not be centered in the right-of-way. The eastern 1.5 -mile portion of this road is maintained by Weld County. LRM Response LRM has a recent ALTA survey that verifies CR 48.5 has a 60' ROW dedication, as shown in the extraction plan map. The Plan drawing has been amended to include the reception numbers for dedication documents. Comment The western 0.5 -mile portion of County Road 48.5 is under the jurisdiction of the Town of Johnstown. This portion is paved. The municipality has jurisdiction over use of the road. Please contact the municipality to verify any additional requirements that may be needed. It is noted that the intersection of the GWR Railroad line, CR 48.5, and CR 17 are under the jurisdiction of the Town of Johnstown. 20220926 DeveiopmentReview TELEST® $O LO t IONS. Iii CO..O• n It To: Mr. Kim Ogle Date: September 27, 2022 Page 3 LRM Response LRM will coordinate with the Town of Johnstown on the use of this portion of County Road 48.5. Comment In addition to CR 48. S, the haul route also includes CR 17 that is a paved arterial roadway per the Weld County Functional Classification map, CR 50 that is a paved collector roadway per the Weld County Classification Map, and CR 13 (also known as Colorado Blvd) that is a paved arterial roadway per the Weld County Classification Map. The proposed haul route includes four bridge crossings: one on CR 48.5 (Thompson and Platte Ditch), two on CR 50 (Little Thompson Annex and Unnamed), and one on CR 13 (Hillsboro Ditch). The property is bounded by State Highway 257. Contact the Colorado Department of Transportation (CDOT) to determine what right-of-way shall be shown on the submitted plat. Reference the documents creating the right-of-way. Please contact Tim Bilobran at the Greeley office, phone number: 970-350-2163. Hwy 257 is not included has a truck haul route but may be used by the 6 employees. LRM Response The exiting 100' ROW shown on the USR map is from LRM's recent ALTA survey. As of September 2, 2022, Tim Bilobran of CDOT has requested a ROW of 75 feet from the centerline of SH257, which has been added to the USR map (Attachment 2). Note that this 75' ROW request encroaches on the Town of Milliken's easement. We acknowledge that Hwy 287 is not included as a truck haul route but may be used by the 6 employees. Comment Per, Sec. 8-13-30.B, a Weld County Right -of -Way Use Permit is required for any project that will be occupying, constructing or excavating facilities within, and/or encroaching upon, any County rights -of -way or easement. Right -of -Way Use Permit instructions and application can be found at https://www.weldgov.com/departments/publicworks/permits/. LRM Response Telesto, on behalf of LRM, has been in communication with the County on the need for a Right -of -Way Use Permit. The County determined that LRM would need to apply for a Right -of -Way Use Permit if they are paving or using concrete within the ROW or if the equipment being used to build the access will block one or both travel lanes during 20220926 DeveiopmentReview TELEST® $O LO t IOM I.Iri CO..O• n It To: Mr. Kim Ogle Date: September 27, 2022 Page 4 construction. These conditions are currently not proposed. LRM acknowledges the need for a Right -of -Way Use permit if plans change and either of those conditions are proposed. Comment Weld County will not replace overlapping easements located within existing right-of-way or pay to relocate existing utilities within the County right-of-way. LRM Response The County's comment is noted. LRM has no easements in the County right-of-way nor can grant any easements in the County ROW. Traffic Comment Recent traffic counts (2020) on the County's portion of CR 48.5 counted 210 (AADT) vehicles per day with 17% trucks. The 85th percentile speed is 54 miles per hour. Recent traffic counts (2021) on this portion of CR 17 counted 4,552 (AADT) vehicles per day with 7% trucks. The 85th percentile speed is 54 miles per hour. Recent traffic counts (2021) on this portion of CR 50 counted 3,085 (AADT) vehicles per day with 10% trucks. The 85th percentile speed is 59 miles per hour. Recent traffic counts (2020) on this portion of CR13 counted 2,667 (AADT) vehicles per day with 22% trucks. The 85th percentile speed is 59 miles per hour. A preliminary Traffic Impact Study was submitted with the application. A final Traffic Impact Study, stamped and signed by a professional engineer licensed in the State of Colorado shall be submitted. LRM Response The County's comment is noted. A Traffic Impact Study, stamped and signed by a professional engineer licensed in the State of Colorado, was submitted with the application. The TIS is being modified to include the new proposed haul route utilizing WCR 17 and WCR 54, as discussed in a meeting with the County on September 20, 2022. The anticipated completion date is sometime later this fall. 20220926 DeveiopmentReview TELEST® $O LO t IONS• Iii COX•O• n 11 I. To: Mr. Kim Ogle Date: September 27, 2022 Page 5 Tracking Control Comment Tracking control is required to prevent tracking from the site onto public roadways. For access to paved roads, tracking control devices can be double cattle guards with 100 ft. of asphalt or 300 ft of asphalt. For access to gravel roads, tracking control devices must be either double cattle guards with 100 ft. of road base, or road base on all driving surfaces. Temporary Tracking Control shall be used during construction unless permanent tracking control is installed ahead of construction activities. Recycled concrete is not allowed in County right-of-way. Tracking control for unmaintained public right-of-way is required just prior to entering publicly maintained roadways. A variance request for alternatives to the tracking control requirement can be submitted to Development Review for review and consideration. This site requires double cattle guards and 100 ft. of asphalt or 300 ft. of asphalt. LRM Response Tracking control (temporary and permanent) will be implemented on site and shown on the amended Plan drawing. Improvements and Road Maintenance Agreement with Up -Front Improvements Comment Public Works is requesting an Improvements and Road Maintenance Agreement for dust control, damage repairs to specified haul routes, triggered off -site improvements and up- front off -site improvements. Consideration may be given to proportional sharing of cost for these improvements. These improvements may include but are not limited to: • Paving county -maintained CR 48.5 from the site access west, • Upgrade of CR 17 as it relates to the improvements associated with CR 17 and CR 48.5 intersection, • Upgrade of the intersection of CR 17 and CR 50 • Upgrade of intersection of CR 50 and CF 13, and • Upgrade of the bridges traversed on the haul route. Improvements/Road Maintenance Agreement: An example agreement is available on the Weld County/Development Review website. It will detail the approved haul route, outline 20220926 DeveiopmentReview TELEST® f O L O t I O N S• I i i C O X t O. n It I. To: Mr. Kim Ogle Date: September 27, 2022 Page 6 the required up front off -site improvements, designate when other off -site improvements will be triggered, and include a maintenance agreement for the haul route. LRM Response The TIS is being modified to include the new proposed haul route utilizing WCR 17 and WCR 54, as discussed in a meeting with the County on September 20, 2022. It is our understanding that this will change the improvements listed in the comment. As per our discussion on September 22, 2022 with the County, LRM will work with the County on the required agreements and consider any in -lieu contributions LRM can make towards County road improvements adjacent to LRM' s property. Drainage Requirements Comment This area IS within an Urbanizing Drainage Area: Urbanizing Drainage Areas typically require detention of runoff from the 1 -hour, 100 year, storm falling on the developed site and release of the detained water at the historic runoff rate of the 1 -hour, 5 -year storm falling on the undeveloped site for URBANIZING areas. LRM Response See Attachment 3, Final Drainage Narrative. Comment Drainage Narrative: The applicant has submitted a preliminary drainage narrative. A final drainage narrative citing an acceptable drainage detention exception, from Sec 8-11-40 of the Code, with adequate documentation shall be submitted. LRM Response See Attachment 3, Final Drainage Narrative, citing exception 8-11-40.I.8(6) for gravel pits. Comment Historic Flows: The applicants will be required to maintain the historic drainage flows and run-off amounts that exist from the property. LRM Response The final drainage narrative (Attachment 3) summarizes historic and proposed drainage flows and runoff amounts. Additionally, LRM received its DRMS permit, which required approval by the Colorado Department of Natural Resources, Office of the State Engineer ensuring that all water rights will be protected under LRM's plan. 20220926 DeveiopmentReview TELEST® fO LO t IONS Iri COII.O.n It To: Mr. Kim Ogle Date: September 27, 2022 Page 7 GRADING PERMIT Comment A Weld County Grading Permit will be required if disturbing more than 1 acre. A Construction Stormwater Permit is also required with the State for disturbing more than 1 acre. Contact: Colorado Department of Public Health and Environment, Water Quality Control Division, 303-692-3575. LRM Response The County's comment is noted. Comment If more than 1 acre is to be disturbed for construction of non gravel pit items such as structures, parking lots, laydown yards etc, a Weld County grading permit will be required prior to the start of construction. Grading Permit applications are accepted after the planning process is complete (plan recorded). An Early Release Request Form may be entertained only after the applicant, Public Works and Planning Department have reviewed the referral and surrounding property owner comments. The Early Release Request may or may not be granted depending on referral comments and surrounding property owner concerns. Contact an Engineering representative from the Public Works for more information. LRM Response The only permanent structure being built on site will be construction of a bridge for the Big Thompson River crossing, which will disturb less than 1 acre. Temporary haul roads and stockpile locations will also be constructed and shift as mining progresses. If plans change to disturb more than 1 acre for non -gravel pit items, LRM will apply for the appropriate permits. CONDITIONS OF APPROVAL Comment An Improvements and Road Maintenance Agreement is required for off -site improvements at this location. Road maintenance includes, but is not limited to, dust control and damage repair to specified haul routes. The Agreement shall include provisions addressing engineering requirements, submission of collateral, and testing and approval of completed improvements. LRM Response LRM will work with the County to develop the required agreements. 20220926 DeveiopmentReview TELEST® $01.11110100 I i i C O X• O. n It I. To: Mr. Kim Ogle Date: September 27, 2022 Page 8 Comment A Final. Drainage Narrative is required. LRM Response The Final Drainage Narrative is included as Attachment 3 with this response. Comment A Final Traffic Impact Study, signed and stamped by a professional engineer in the State of Colorado, is required. LRM Response LRM will submit the modified TIS that includes the new proposed haul route utilizing WCR 17 and WCR 54, as discussed in a meeting with the County on September 20, 2022. Comment The plan shall be amended to delineate the following: 1. The County -maintained portion of CR 48.5 is a gravel road and is designated on the Weld County Functional Classification Map as a local road which requires 60 feet of right-of-way at full buildout. The applicant shall delineate and label on the site map or plat the future and existing right-of-way (along with the documents creating the existing right-of-way) and the physical location of the road. All setbacks shall be measured from the edge of right-of-way. This road is maintained by Weld County. 2. Show the Colorado Department of Transportation (CDOT) right-of-way for Hwy 257 on the plat along with the documents creating the right-of-way. 3. Show and label the access location onto CR 48.5, approved access width, and the appropriate turning radii on the site plan. Specify the access type. 4. Show and label the required tracking control. S. Show and label the entrance gate if applicable. An access approach that is gated shall be designed so that the longest vehicle (including trailers) using the access can completely clear the traveled way when the gate is closed. In no event, shall the distance from the gate to the edge of the traveled surface be less than 35 feet. 6. Show and label the drainage flow arrows. 20220926 DeveiopmentReview TELEST® $01.11110100 I i i C O X• O. n It I. To: Mr. Kim Ogle Date: September 27, 2022 Page 9 7. Show and label the parking and traffic circulation flow arrows showing how the traffic moves around the property. LRM Response LRM will amend the Plan drawing to delineate these items, where applicable. No permanent parking spaces are proposed. Mining equipment and employee parking will be located near the active mining location. DEVELOPMENT STANDARDS (NOTES ON THE SITE PLAN) Comment The property owner or operator shall be responsible for controlling noxious weeds on the site, pursuant to Chapter 15, Article I and II, of the Weld County Code. LRM Response The County's comment is noted. A Weed Inventory, Monitoring, and Control Plan is attached to this letter (Attachment 4). This note shall be added to the Plan drawing. Comment The access to the site shall be maintained to mitigate any impacts to the public road, including damages and/or off -site tracking. LRM Response The County's comment is noted. This note shall be added to the Plan drawing. Comment Weld County will not replace overlapping easements located within existing right-of-way or pay to relocate existing utilities within the existing County right-of-way. LRM Response This note shall be added to the Plat drawing. Comment Any work that may occupy and or encroach upon any County rights -of -way or easement shall acquire an approved Right -of -Way Use Permit prior to commencement. LRM Response This note shall be added to the Plat drawing. 20220926 DeveiopmentReview TELEST® fO LO t IOM l.Iri COII.O.n It I: To: Mr. Kim Ogle Date: September 27, 2022 Page 10 Comment Prior to the release of building permits, the applicant shall be required to submit a complete access application for a "preliminarily approved" access location as shown on this plat LRM Response This project does not require building permits. LRM submitted an access permit application to Weld County on September 8, 2021. LRM then submitted additional photos of the proposed access location on September 23, 2021, per the request of Weld County. LRM then submitted a new figure with a 65' turning radii on December 16, 2021, per the request of Weld County. On September 13, 2022, Telesto/LRM asked for a revision to reflect a 28' wide drive instead of a 14' wide drive Comment There shall be no parking or staging of vehicles on public roads. On -site parking shall be utilized. LRM Response This note shall be added to the Plan drawing. LRM will only utilize on -site parking. No permanent parking spaces are proposed. Mining equipment and employee parking will be located near the active mining location. Comment The historical flow patterns and runoff amounts on the site will be maintained. LRM Response LRM shows the historical and proposed flow patterns and runoff amounts in the final drainage narrative. This note shall be added to the Plan drawing. Sincerely, Telesto Solutions, Inc: Taryn Tigges, PE Senior Engineer TMT:wln 20220926 DeveiopmentReview TELEST® $O LO t IONS. Iii CO..O• n It To: Mr. Kim Ogle Date: September 27, 2022 Page 11 Attachments: 1: Access Permit and Right -of -Way E-mail Correspondence 2: Weed Inventory, Monitoring, and Control Plan: Loveland Ready -Mix Concrete Inc.'s Dunn Pit 3: Final Drainage Narrative 4: USR Map cc: Stephanie Fancher-English, Loveland Ready -Mix Concrete, Inc. 20220926 DeveiopmentReview TELEST® $O LO t IONS• In COX•O• n 11 I. Attachment 1 Access Permit Correspondence Taryn Tigges From: Sent: To: Cc: Subject: Jennifer Fuller <jfuller@weldgov.com> Thursday, September 15, 2022 11:28 AM Jon Cullor Taryn Tigges RE: Access Permit Application - Dunn Pit Hi Jon, I have marked the application with your update and will check in with the Planner regarding the status of the case. Thank you. Jennifer Fuller Development Review — Access Permits 1555 N 17th Ave, PO Box 758 I Greeley, CO 80631 jfutler©weldgov.com I 970-400-3728 Confidentiality Notice: This electronic transmission and any attached documents or other writings are intended only for the person or entity to which it is addressed and may contain information that is privileged, confidential or otherwise protected from disclosure. If you have received this communication in error, please immediately notify sender by return e-mail and destroy the communication. Any disclosure, copying, distribution or the taking of any action concerning the contents of this communication or any attachments by anyone other than the named recipient is strictly prohibited. From: Jon Cullor <jcullor@telesto-inc.com> Sent: Tuesday, September 13, 2022 3:18 PM To: Jennifer Fuller <jfuller@weldgov.com> Cc: Taryn Tigges <ttigges@telesto-inc.com> Subject: RE: Access Permit Application - Dunn Pit Caution: This email originated from outside of Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. Jennifer, The client has asked us to modify this driveway permit to reflect a 28' drive instead of the 14' drive listed in the application (attached). Since this application has yet to be approved, I assume this change can still be made. What do I need to do make this modification? Regards, Jonathan Cullor, P.E. (AZ, CO, ID, MT, NM, NV, TX) I Senior Engineer Office: 970-484-7704 I Cell: 970-658-6051 750 14th Street SW I Loveland, CO 80537 1 TELEST Ca L 9 '1 cs P4 5 4 9 N C Q! lR P LI k A I k www.telesto-inc.com From: Jennifer Fuller < fuller@weldgov.com> Sent: Wednesday, June 8, 2022 10:01 AM To: Taryn Tigges <ttigges@telesto-inc.com>; Dawn Anderson <dranderson@weldgov.com> Subject: RE: Access Permit Application - Dunn Pit Good morning Taryn, Thank you for the notification. This access application is now on my radar and I will be working with Planning staff to await approval of the USR. Will you remain the notification contact for the access permitting when we are ready to proceed? Jennifer Fuller Development Review — Access Permits 1555 N 17th Ave, PO Box 758 I Greeley, CO 80631 jfuIIerweldgov.com I 970-400-3728 Confidentiality Notice: This electronic transmission and any attached documents or other writings are intended only for the person or entity to which it is addressed and may contain information that is privileged, confidential or otherwise protected from disclosure. If you have received this communication in error, please immediately notify sender by return e-mail and destroy the communication. Any disclosure, copying, distribution or the taking of any action concerning the contents of this communication or any attachments by anyone other than the named recipient is strictly prohibited. From: Taryn Tigges <ttigges@telesto-inc.com> Sent: Sunday, June 5, 2022 8:34 AM To: Jennifer Fuller <jfuller@weldgov.corm>; Dawn Anderson <dranderson@weldgov.com> Subject: FW: Access Permit Application - Dunn Pit Caution: This email originated from outside of Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. Jennifer and Dawn, We submitted an access permit application to Tiffnee last September and she said to let her know when we submitted the full USR application package. We submitted that application on May 23. Please let me know if anything else is required to move forward with the access permit. Thank you! Taryn Tigges, PE 2 Office: 970-484-7704 Cell: 515-520-9454 From: Taryn Tigges Sent: Sunday, June 5, 2022 8:30 AM To: Tiffnee Lamb <tklamb@weldgov.com> Subject: RE: Access Permit Application - Dunn Pit Hi Tiffnee, I just wanted to let you know that we submitted the USR application on May 23. Let me know if you need anything else for the access permit application. Thanks, Taryn Tigges, PE Office: 970-484-7704 Cell: 515-520-9454 From: Tiffnee Lamb <tklamb@weldgov.com> Sent: Tuesday, January 4, 2022 3:19 PM To: Taryn Tigges <ttigges@telesto-inc.com> Subject: RE: Access Permit Application - Dunn Pit Hello Taryn, Thank you for your email. You will need to apply for a Right of Way Permit if you are paving or using concrete within the right of way OR if the equipment being used to build the access will block one or both travel lanes during construction. I do not think either apply to you or this project so an access permit is probably all you would need to construct the access. Thank you again for your time, Tiffnee Tiffnee Lamb Access Permits Weld County Planning Services 1555 N. 17th Ave. Greeley, CO 80631 (970)400-3718 Confidentiality Notice: This electronic transmission and any attached documents or other writings are intended only for the person or entity to which it is addressed and may contain information that is privileged, confidential or otherwise protected from disclosure. If you have received this communication in error, please immediately notify sender by return e-mail and destroy the communication. Any disclosure, copying, distribution or the taking of any action concerning the contents of this communication or any attachments by anyone other than the named recipient is strictly prohibited. 3 From: Taryn Tigges <ttigges@telesto-inc.com> Sent: Tuesday, January 4, 2022 11:14 AM To: Tiffnee Lamb <tklamb@weldgov.com> Subject: RE: Access Permit Application - Dunn Pit Caution: This email originated from outside of Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. Thanks, Tiffnee. We will copy you on the submittal. Additionally, I wanted to ask about a right-of-way permit. Constructing this access is the only work we'll be doing in the ROW so I'm assuming we don't need to apply for a right-of-way permit but please let me know if we do need to apply for one. Thanks, Taryn Tigges, PE Office: 970-484-7704 Cell: 515-520-9454 From: Tiffnee Lamb <tklamb@weldgov.com> Sent: Tuesday, December 28, 2021 8:54 AM To: Taryn Tigges <ttigges@telesto-inc.com> Subject: RE: Access Permit Application - Dunn Pit Hi Taryn, Thanks so much for sending these over. I will add them to your application. The proposed access point appears adequate and to meet the Weld County Code criteria. Please copy me or let me know when you and your team submit the USR application. Thank you and I hope you have a great day, Tiffnee Tiffnee Lamb Access Permits Weld County Planning Services 1555 N. 17th Ave. Greeley, CO 80631 (970)400-3718 Confidentiality Notice: This electronic transmission and any attached documents or other writings are intended only for the person or entity to which it is addressed and may contain information that is privileged, confidential or otherwise protected from disclosure. If you have received this communication in error, please immediately notify sender by return 4 e-mail and destroy the communication. Any disclosure, copying, distribution or the taking of any action concerning the contents of this communication or any attachments by anyone other than the named recipient is strictly prohibited. From: Taryn Tigges <ttigges@telesto-inc.com> Sent: Thursday, December 16, 2021 4:50 PM To: Tiffnee Lamb <tklamb@weldgov.com> Subject: RE: Access Permit Application - Dunn Pit Caution: This email originated from outside of Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hi Tiffnee, The updated application includes the new photos (previously sent) and the figure now showing 65' turning radii. Thanks, Taryn Tigges, PE Office: 970-484-7704 Cell: 515-520-9454 From: Tiffnee Lamb <tklamb@weldgov.com> Sent: Monday, November 1, 2021 9:58 AM To: Taryn Tigges <ttigges@telesto-inc.com> Subject: RE: Access Permit Application - Dunn Pit Thanks so much for sending these over. I will add them to your application. Thank you and I hope you have a great day, Tiffnee Tiffnee Lamb Access Permits Weld County Planning Services 1555 N. 17th Ave. Greeley, CO 80631 (970)400-3718 Confidentiality Notice: This electronic transmission and any attached documents or other writings are intended only for the person or entity to which it is addressed and may contain information that is privileged, confidential or otherwise protected from disclosure. If you have received this communication in error, please immediately notify sender by return e-mail and destroy the communication. Any disclosure, copying, distribution or the taking of any action concerning the contents of this communication or any attachments by anyone other than the named recipient is strictly prohibited. 5 From: Taryn Tigges <ttigges@telesto-inc.com> Sent: Tuesday, October 26, 2021 8:51 AM To: Tiffnee Lamb <tklamb@weldgov.com> Subject: RE: Access Permit Application - Dunn Pit Caution: This email originated from outside of Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. Yes, we can have the 65ft turning radii From: Tiffnee Lamb <tklamb@weldgov.com> Sent: Thursday, October 21, 2021 11:07 AM To: Taryn Tigges <ttigges@telesto-inc.com> Subject: RE: Access Permit Application - Dunn Pit Hello Taryn, Yes, of course. I do not see any issues with the location of this access point. The only thing I see that our engineers will question is the proposed turning radii. For commercial accesses you are allowed to have a width less than 40ft but have a minimum of 65ft turning radii. Are you able to have a 65ft turning radii? Thank you for your time, Tiffnee Tiffnee Lamb Access Permits Weld County Planning Services 1555 N. 17th Ave. Greeley, CO 80631 (970)400-3718 Confidentiality Notice: This electronic transmission and any attached documents or other writings are intended only for the person or entity to which it is addressed and may contain information that is privileged, confidential or otherwise protected from disclosure. If you have received this communication in error, please immediately notify sender by return e-mail and destroy the communication. Any disclosure, copying, distribution or the taking of any action concerning the contents of this communication or any attachments by anyone other than the named recipient is strictly prohibited. From: Taryn Tigges <ttigges@telesto-inc.com> Sent: Wednesday, October 20, 2021 10:17 AM To: Tiffnee Lamb <tklamb@weldgov.com> Subject: RE: Access Permit Application - Dunn Pit Caution: This email originated from outside of Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. 6 Thanks, Tiffnee. We have not submitted the USR app yet but also wanted to ensure that you approve of the access location early in the process. Is that something you could let us know before we submit the rest of the USR application? Thanks, Taryn From: Tiffnee Lamb <tklamb@weldgov.com> Sent: Wednesday, October 20, 2021 10:13 AM To: Taryn Tigges <ttigges@telesto-inc.com> Subject: RE: Access Permit Application - Dunn Pit Hello Taryn, Thank you for your email. We approve the access permit along with the USR review and approval. Has a USR app been submitted yet? Thank you for your time, Tiffnee Tiffnee Lamb Access Permits Weld County Planning Services 1555 N. 17th Ave. Greeley, CO 80631 (970)400-3718 Confidentiality Notice: This electronic transmission and any attached documents or other writings are intended only for the person or entity to which it is addressed and may contain information that is privileged, confidential or otherwise protected from disclosure. If you have received this communication in error, please immediately notify sender by return e-mail and destroy the communication. Any disclosure, copying, distribution or the taking of any action concerning the contents of this communication or any attachments by anyone other than the named recipient is strictly prohibited. From: Taryn Tigges <ttigges@telesto-inc.com> Sent: Friday, October 15, 2021 3:25 PM To: Tiffnee Lamb <tklamb@weldgov.com> Subject: RE: Access Permit Application - Dunn Pit Caution: This email originated from outside of Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hi Tiffnee, Do you have a timeframe on when we may expect to hear back on the access permit? I'm not sure we heard back on how to pay the application fee. Let me know the best way to do that. Thanks, Taryn Tigges, PE (AZ, CO, NM) I Senior Engineer Office: 970-484-7704 I Cell: 515-520-9454 750 14th St SW I Loveland, CO 80537 [I.E 519 SOLLUTIONS.444 CIOat.4ORATED www.telesto-inc.com From: Tiffnee Lamb <tklamb@weldgov.com> Sent: Thursday, September 30, 2021 8:50 AM To: Taryn Tigges <ttigges@telesto-inc.com> Cc: Jon Cullor <jcullor@telesto-inc.com> Subject: RE: Access Permit Application - Dunn Pit Thanks so much for sending these over. I will add them to your application. Thank you and I hope you have a great day, Tiffnee Tiffnee Lamb Access Permits Weld County Planning Services 1555 N. 17th Ave. Greeley, CO 80631 (970)400-3718 Confidentiality Notice: This electronic transmission and any attached documents or other writings are intended only for the person or entity to which it is addressed and may contain information that is privileged, confidential or otherwise protected from disclosure. If you have received this communication in error, please immediately notify sender by return e-mail and destroy the communication. Any disclosure, copying, distribution or the taking of any action concerning the contents of this communication or any attachments by anyone other than the named recipient is strictly prohibited. From: Taryn Tigges <ttigges@telesto-inc.com> Sent: Thursday, September 23, 2021 8:35 AM To: Tiffnee Lamb <tklamb@weldgov.com> 8 Cc: Jon Cullor <jcullor@telesto-inc.com> Subject: RE: Access Permit Application - Dunn Pit Caution: This email originated from outside of Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hi Tiffnee, Let me know if the attached photos are adequate. Thanks, Taryn Tigges, PE (AZ, CO, NM) I Senior Engineer Office: 970-484-7704 I Cell: 515-520-9454 750 14th St SW I Loveland, CO 80537 TELESTiI► www.telesto-inc.com From: Tiffnee Lamb <tklamb@weldgov.com> Sent: Friday, September 17, 2021 1:35 PM To: Taryn Tigges <ttigges@telesto-inc.com> Cc: Jon Cullor <jcullor@telesto-inc.com> Subject: RE: Access Permit Application - Dunn Pit Hello, Thank you for submitting an access permit application. Staff is needing a few things to complete the application before we are able to process it. Under our Required Attached Documents section of the application we require access photos that are from 4 different viewpoints. From the left, right, looking into and out of proposed access point. (labeled North, South, East & West) Are you able to take the remaining 3 photos? I believe the one that was submitted is facing west. Thank you and please reach out to me if you have any questions. Tiffnee Tiffnee Lamb Access Permits Weld County Planning Services 1555 N. 17th Ave. Greeley, CO 80631 (970)400-3718 9 Confidentiality Notice: This electronic transmission and any attached documents or other writings are intended only for the person or entity to which it is addressed and may contain information that is privileged, confidential or otherwise protected from disclosure. If you have received this communication in error, please immediately notify sender by return e-mail and destroy the communication. Any disclosure, copying, distribution or the taking of any action concerning the contents of this communication or any attachments by anyone other than the named recipient is strictly prohibited. From: Taryn Tigges <ttigges@telesto-inc.com> Sent: Wednesday, September 8, 2021 2:28 PM To: Accesspermits <Accesspermits@weldgov.com> Cc: Jon Cullor <Icullor@telesto-inc.com> Subject: Access Permit Application - Dunn Pit Caution: This email originated from outside of Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. Please find attached the Access Permit Application Form and attachments from Loveland Ready -Mix. Let me know how we should pay the application fee and if any other information is needed. Thanks, Taryn Tigges, PE (AZ, CO, NM) I Senior Engineer Office: 970-484-7704 I Cell: 515-520-9454 750 14th St SW I Loveland, CO 80537 4 LEST C ' TIONS' 4$ CC) It www.telesto-inc.com 10 Attachment 2 Weed Inventory Monitoring and Control Plan Weed Inventory, Monitoring, and Control Plan Loveland Ready -Mix Concrete, Inc.'s Dunn Pit Prepared for Loveland Ready Mix 644 Namaqua Ave Loveland, Colorado 80537 Prepared by Telesto Solutions Inc. 750 14t" Street SW Loveland, Colorado 80537 January 2022 TELESTC: S O L U T I O N S* I N C O R POPATE IT) Signature Page Weed Inventory, Monitoring, and Control Plan Loveland Ready -Mix Concrete, Inc.'s Dunn Pit January 2022 7ELEST'S S O L U T I O N S ORPORATED Report Authors and Contributors Telesto Solutions, Inc. a Tim Gerken — Primary Author Taryn Tigges — Report Review Contributors: LRM i 20210120 dtuin pit_weed management plan_final January 2022 TELETQ Table of Contents 1.0 INTRODUCTION 1 2.0 WEEDS OF CONCERN 1 3.0 WEED MANAGEMENT 2 4.0 WEED PREVENTION 3 5.0 SUMMARY AND ADDITIONAL REFERENCES 3 List of Appendices Appendix A Weld County Noxious Weed Lists LRM ii 20210120 dtuin pit_weed management plan_final January 2022 TELETQ 1.0 INTRODUCTION The Colorado Noxious Weed Act (CR5. Title 35, Article 5.5) declares that certain undesirable plants constitute a threat to the "continuous economic and environmental value of lands of the state" and requires that these "noxious weeds" be managed on private and public lands. The Act further declares that control of noxious weeds should use methods that are least damaging to the environment but also practicable and economically reasonable. Loveland Ready -Mix Concrete, Inc. (LRM) has prepared this weed management plan for the proposed Dunn Pit to meet the requirements of Weld County and the State. 2.0 WEEDS OF CONCERN The Weld County Noxious Weed Management Enforcement Policy follows the guidelines of the Colorado State Noxious Weed Act; it prioritizes noxious weed species into three lists. List A Species are not well established but are potentially a large problem to the State of Colorado and require mandatory eradication. Though none have been identified on the site, if any List A species are found they will be immediately eradicated in accordance with the Colorado State Noxious Weed Act. List A Species will be managed with appropriate herbicide applications. List A Species found in Weld County are summarized in Appendix A. List B Species will be managed with mowing and targeted herbicide application. Several List B noxious weeds that are currently observed onsite in small patches are Perennial pepperweed, Diffuse knapweed, Wild caraway, Hoary cress, and Common thistle. Appendix A presents List B species found in Weld County. LRM 1 20210120 dtuin pit_weed management plan_final January 2022 TELETQ List C Species have the potential to be very invasive noxious weeds if not addressed and eradicated. List C Species will be managed with appropriate herbicide applications. List C Species found in Weld County are listed in Appendix A. 3.0 WEED MANAGEMENT Pre-existing weeds identified on site will be controlled through continued attention and spot application of the appropriate herbicides. Controlling the existing infestations is an important preventative measure that keeps weeds from spreading and increasing in size. The primary management methods to control weeds will be grazing, mechanical control, and herbicide control. Topsoil has supported grazing and other agricultural uses on this site for decades, however, if sufficient new grass growth does not occur within two seasons after planting, the soil base and weed growth will be re-examined, treated as necessary, and reseeded. Grazing Control is currently being utilized on site. Leased pasture is used to graze cattle. Since mining will be progressive, exposing limited areas at a time, remaining pasture will continue to be grazed until mining progresses to the point that grazing is no longer feasible. Care will be taken not to overgraze the remaining pasture areas. Mechanical Control will be performed through consistent mowing. Mowing is effective in keeping weeds under control and will prevent seed dispersal and provide suppression so that new grass growth may occur. LRM will mow problem areas and newly reclaimed areas at least two time per growing season to help eliminate weeds and establish new grass. Herbicide Control will be through herbicide applications tailored to the type of weed being treated. Any broadcast applications will be selective products that can be broadcast applied and not injure the grass species. Spot -spray applications of non -selective herbicides such as Roundup will only be used to control isolated noxious weeds. LRM 2 20210120 dtuin pit_weed management plan_final January 2022 TELETQ 4.0 WEED PREVENTION The reclamation and re -vegetation process can take several years to fully implement and achieve desired results. Early control and management of new weed infestations through identification, early detection and response will be utilized for disturbed areas that have been reseeded as a part of the reclamation process. Noxious weeds can become established on or near disturbed land very rapidly and have the capacity, capability, and potential to spread quickly to other areas. Noxious weed seeds and vegetative matter can be transported by means of animals, vehicles, shoes, waterways, and hay to name a few examples of transportation. Personnel should be aware of established noxious weed populations and the possible transport mechanisms on their property and surrounding properties. After an area has been successfully eradicated of noxious species or before establishment has taken place, LRM will either revegetate the disturbed area to minimize the chance of noxious weed establishment or promote a more active inspection program to maintain the bare ground conditions. If the disturbed land has desired species growing as a result of revegetation efforts, competition with noxious species will increase. Therefore, the potential and capability of the noxious weed to establish in the disturbed area is limited. 5.0 SUMMARY AND ADDITIONAL REFERENCES Weed management decisions vary according to plant life cycles, infestation size, and environmental conditions. A licensed applicator with experience in weed control management in Colorado will be used to prepare a plan for any application of herbicides used to control weeds on site. Other resources that may also be consulted are CSU Extension's "Weed Management for Small Rural Acreages -3.106" and the Weld County "Noxious Weed Management Enforcement Policy". All herbicide application plans will include the specific herbicide(s) to be used, the application rate, and the appropriate timing. Care will always be taken to prevent any overspray onto neighboring properties. Additional state resources for weed management include: LRM 3 20210120 dtuin pit_weed management plan_final January 2022 TELETQ https://www.colorado.gov/pacific/agconservation/county-weed-programs https://www.colorado.gov/pacific/agconservation/noxiousweeds https://cwma.org/ LRM 4 20210120 dtuin pit_weed management plan_final January 2022 TELETQ Appendix A Weld County Noxious Weed Lists LRM 6 20210120 dtuin pit_weed management plan_final January 2022 TELETQ A List - Weld County List A species are invasive weeds that are either not known to occur in Colorado or are of very limited distribution and are required to be eradicated (completely eliminated). Cypress spurge (Euphorbia cyparissias) Hairy willow -herb (Epilobium hirsutum) Japanese knotweed (Polygonum cuspidatum) Myrtle spurge (Euphorbia myrsinites) Purple loosestrife (Lythrum salicaria) B List - Weld County List B species are invasive weeds with populations of varying distribution and densities within the state. The level of mandated control is based on local conditions. These weeds may require eradication within certain areas of the state. Absinth wormwood (Artemisia absinthium) Black henbane (Hyoscyamus niger) Bouncingbet (Saponaria officinalis) Bull thistle (Cirsium vulgare) Canada thistle (Cirsium arvense) Chamomiles Chinese clematis (Clematis orientalis) Common tansy (Tanacetum vulgare) Common teasel (Dipsacus fullonum) Cutleaf teasel (Dipsacus laciniatus) Dalmatian toadflax, broad-leaved (Linaria dalmatica) Dalmatian toadflax, narrow -leaved (Linaria genistifolia) Dame's rocket (Hesperis matronalis) Diffuse knapweed (Centaurea diffusa) Eurasian watermilfoil (Myriophyllum spicatum) Hoary cress (Cardaria draba) Houndstongue (Cynoglossum officinale) Jointed goatgrass (Aegilops cylindrica) Leafy spurge (Euphorbia esula) Mayweed chamomile (Anthemis cotula) Moth mullein (Verbascum blattaria) Musk thistle (Carduus nutans) Oxeye daisy (Leucanthemum vulgare) Perennial pepperweed (Lepidium latifolium) Plumeless thistle (Carduus acanthoides) Russian knapweed (Acroptilon repens) Russian -olive (Elaeagnus angustifolia) Salt cedar (Tamarix chinensis, T.parviflora, and T ramosissima) Scotch thistle (Onopordum acanthium) Scotch thistle (Onopordum tauricum) Spotted knapweed (Centaurea maculosa) Sulfur cinquefoil (Potentilla recta) Wild caraway (Carum carvi) Yellow nutsedge (Cyperus esculentus) Yellow toadflax (Linaria vulgaris) C List - Weld County List C species are widespread and common within the state. They may pose a risk to agricultural lands and may be required to be controlled. Common mullein (Verbascum thapsus) Cheatgrass/Downy brome (Bromus tectorum) Field bindweed (Convolvulus arvensis) Puncturevine/Goatheads (Tribulus terrestris) Attachment 3 Drainage Narrative TELESTO SOLUTIONS* INCORPORATED September 23, 2022 Via Electronic Mail Weld County Public Works Department 1111 H Street Greeley, Colorado 80631 Subject: Dunn Pit, Use by Special Review Final Drainage Narrative To Whom it May Concern: Loveland Ready -Mix Concrete, Inc. (LRM) proposes the construction and operation of a new sand and gravel mine (Project). The Project will be located at the northwest corner of Colorado Highway 257 and Weld County Road 48'/2 in Weld County (Site; Figure 1). The proposed mining operations will include the recovery of sand and gravel resources to produce concrete to serve the Northern Colorado area. Weld County's Use by Special Review (USR) Drainage Requirements allow for the completion of a drainage narrative in lieu of a drainage report for certain land uses. LRM hereby requests an exemption to stormwater detention and presents this drainage narrative based on the Project's intended operational use as a gravel pit. PROJECT DESCRIPTION The Site is currently undeveloped and is used for cattle grazing and oil extraction. The proposed Project plans to develop the Site as a sand and gravel mine. Specific development activities include: • Constructing a Site access road and bridge from the proposed Site entrance northward across the Big Thompson River • Excavating three aggregate mine cells to a depth of approximately 30 feet, which will become unlined, groundwater -fed lakes • Hauling the mined aggregate to LRM's permitted Johnstown concrete, batch plant for processing • Reclaiming the mined slopes above the groundwater table and establishing new wetlands in and around the mined cells During mining, LRM will temporarily stockpile mined aggregate for approximately 1 -day to allow the material to drain before hauling. LRM will conduct reclamation concurrent to mining and anticipates no long-term storage of reclamation materials in the floodplain. Figure 2 shows the final configuration of the Project. No permanent structures will be Colorado Office (Corporate) New Mexico Office 750 14th Street SW Loveland, Colorado 80537 970-484-7704 / 970-484-7789 (FAX) 1303 Pope Street Silver City, New Mexico 88061 575-538-5620 / 575-538-5625 (FAX) To: Weld County Public Works Department Date: September 23, 2022 Page 2 erected during the Project besides the Big Thompson River bridge. The bridge will remain in place after mining is complete. EXISTING SITE HYDROLOGY Flow Patterns The Big Thompson River runs west to east through the center of the Site (Figure 1). Stormwater currently runs onto the Site, across the Site, and toward the Big Thompson River from the north, south and west. Stormwater is discharged from the Site along the eastern property line via the Big Thompson River. Ditches The Thompson and Platte Ditch is located approximately 500 feet to the south of the Site while the Hill and Brush Ditch adjoins a portion of the northwest property line (Figure 1). Hill and Brush Ditch return flows are discharged to the Big Thompson River approximately 200 feet upstream of the Site. There are no ditches located on the Site. Floodplain/Floodway Status The Site lies entirely within the 100 -year floodplain and almost entirely within the regulatory floodway (Figure 3). The County has issued a Flood Hazard Development Permit, FHDP21-0024, to LRM for the project (dated November 30, 2021). PROPOSED SITE HYDROLOGY Although Weld County' s USR Drainage Requirements allow an exemption for stormwater detention, LRM is still required to release detained water at the historic runoff rate of the 1 -hour, 5 -year storm falling on the undeveloped site. Flow Patterns Upon completion of the Project, upgradient surface water runoff will be intercepted by the mining cells and will be released to the Big Thompson River in a controlled manner which complies with the requirements of the USR Drainage Requirements. The Project proposes to pass flood flows between the proposed mine cells and the Big Thompson River in the following manner (Figure 2): • Floodwater will enter cells Cl and C2 via overland flow or one of two pit inlet weirs along the Big Thompson River near the western Site boundary. 20220923 Drainage Narrative TELEST® $O LO t IONS. Iii COX.O. n It To: Weld County Public Works Department Date: September 23, 2022 Page 3 • Floodwater will flow between cells C2 and C3 via an adjustable outlet weir and pipeline or via overland flow across the existing gravel road. • Floodwater will be discharged from cell C 1 into the Big Thompson River near the eastern Site boundary via an adjustable outlet weir and channel. This weir was sized to limit pit discharges to the historical 1 -hour, 5 -year peak discharge rate during the 1 -hour, 100 -year runoff event (see the attached calculation set). • Floodwater will enter/exit cell C3 from/to the Big Thompson River via a pit inlet/outlet weir near the eastern Site boundary. However, cell C 1 provides enough effective storage below the pit inlet/outlet weir that there will be no discharge to the river during the 1 -hour, 100 -year runoff event (see the attached calculation set). Therefore, no hydraulic control structure specific to the 1 -hour, 100 -year runoff event was required on the cell C3 outlet to limit discharges to the 1 -hour, 5 -year historical peak discharge. Sincerely, Telesto Solutions, Inc. Jo an Cullor, or, PE Senior Engineer JC:tt tt Enclosure 20220923 Drainage Narrative TELEST® $O LO t IONS. Iii COX.O. n It TELESTQ SOLUTIONS• INCORPORATED Job No: 300100-00o-01ot Client:LoveLamol Readu-MLKpage I of 13 Task: t cvtvt, P1± H-HoiroLorj J Computed By: j. CuLLor Date: 03/23/22 Checked By: T. neges Date: 03/23/22 Problem Statement: Calculation Documentation Loveland Ready -Mix Concrete, Inc. (LRM) proposes the construction and operation of a new sand and gravel mine (Project) at the northwest corner of Colorado Highway 257 and Weld County Road 48 1/2 in Weld County (Site). The proposed mining operations will include the recovery of sand and gravel resources to produce concrete to serve the Northern Colorado area. Weld County's use by special review (USR) drainage requirements allows exemptions to stormwater detention for gravel pits if stormwater drains into the gravel pits. Although Weld County allows detention exemptions, releases from the Site must still comply with Weld County Storm Drainage Criteria, including dewatering. Objectives: 1. Design hydraulic structures for the Project Site that release stormwater in a manner that complies with Weld County Storm Drainage Criteria Approach: 1. Define the Weld County Storm Drainage Criteria and Use By Special Review (USR) Drainage Requirements that apply to the Project Site 2. Choose a hydrologic calculation method 3. Complete the hydrologic calculations necessary to define and quantify how water will be released from the Site's gravel pits 4. Design hydraulic structures for the gravel pits Data and Assumptions: 1. Weld County Storm Drainage Criteria (County Code Article Xl, Sec. 8-11) a. Requires detention of runoff from the 1 -hour, 100 -year, storm falling on the developed site (exemption requested) b. Requires release of the detained water at the historic runoff rate of the 1 -hour, 5 -year storm falling on the undeveloped site for urbanizing areas, and the historic runoff rate of the 1 -hour, 10 -year storm falling on the undeveloped Site for non -urbanizing areas. Weld County classified the Dunn Pit Site as an urbanizing area. c. Defines historic as an undeveloped site with a 2.0% imperviousness 2. USR Drainage Requirements a. Requires detention ponds be sized using the historic runoff value (5 -year runoff for urbanizing; 10 -year runoff for non -urbanizing) as the pond release rate for the 100 - year 1 -hour storm event. TELESTQ SOLUTIONS• INCORPORATED Job No: 300100 -00o -old Client:LoveLamol Readu-MIKpage 2 ,,f 13 Task: t cvtvt, P1± H-HoiroLorj J Computed By: j. CuLLor Date: 03/23/22 Checked By: T. neges Date: 03/23/22 Data and Assumptions (cont'd): b. Requires that a 100% impervious value be used for pond water surface area when calculating the weighted C value for the proposed site. c. The Mile High Flood District (MHFD) regional time of concentration calculation of ((total length/180)+10) should not be used in calculation of historic runoff 3. Hydrologic Method a. Although the MHFD restricts the use of the Rational Method to basins of 90 acres or smaller, Weld County Storm Drainage Criteria states that "The Rational Method should not be used to determine runoff for basins larger than one hundred sixty (160) acres." b. Weld County Storm Drainage Criteria states that "In areas located in the southwest portion of Weld County, where areas are larger than one hundred sixty (160) acres that have drainage characteristics similar to an urban area, the Colorado Urban Hydrograph Procedure (CUHP) is an acceptable model for determining runoff amounts. The CUHP model can be used for basins from zero (0) to three thousand (3,000) acres. The CUHP model is not applicable in non -urban areas, including those areas in Weld County that are outside of the Denver Metropolitan Area." c. Weld County Storm Drainage Criteria states that "Public Works may accept other methodologies as deemed appropriate by the design engineer." 4. Hydrologic Data a. Soils: i. Soils data was downloaded from the NRCS Web Soil Survey web application at: https://websoilsurvey.sc.egov.usda.gov/App/WebSoilSurvey.aspx ii. The Site was defined by the NRCS as 2.8% Hydrologic Soil Group (HSG) C, 92.7% HSG D, and 4.5% water (attached) b. Rainfall: i. Rainfall data was downloaded from NOAA Atlas 14 web application at: https://hdsc.nws.noaa.gov/hdsc/pfds/pfds map cont.html ii. The 5 -year 1 -hour precipitation depth was identified as 1.11 inches (attached) iii. The 100 -year 1 -hour precipitation depth was identified as 2.77 inches (attached) c. Topography: i. Catchments were delineated using topography derived in ACAD from the Site mine plan set ii. Additional data including but not limited to flow paths and slopes were also derived in ACAD from the Site mine plan set iii. Topography in the Site mine plan set was derived from a combination of data obtained during the site survey and online DEM data 5. Assumptions a. The Project Site is located within the Big Thompson 100 -year floodplain. This hydrologic analysis was conducted independently of the flood hydrology of the Big Thompson River and assumed that the river would have adequate capacity to receive Site discharges during 100 -year 1 -hour runoff event. Calculations: Job No: 3&0100-00c-oioi Client:LoveLavt,d Fzeadtj-MLXPage 13 Task. I 1/t 1414 P1t H-HdroLoSU Computed By: j. CuLLor Date: 03/23/22 Checked By: T. T ieages Date: 03/23/22 1. Hydrologic method: a. Delineation of basins: Site stormwater basins were delineated from existing and proposed contours. The basins delineated to encompass the proposed developed pits and the existing upgradient drainage areas to be captured by the pits. Since the areas outside of the pit boundaries and outside of the upgradient basins will' not be developed and will be left in their natural state (grazed pasture), it is assumed that post development runoff from these areas will be equal to pre -development runoff. Delineated basin properties are as follows: i. North Basin area = 61.25 acres ii. South Basin area = 101.48 acres NORTH BASIN it 4 PROPERTY LINE b. Since both the North Basin and South Basin areas are less than 160 acres, and the Site is not within the Denver Metropolitan Area, the Rational Method was chosen as the hydrologic method for this analysis. TELESTQ SOLUTIONS• INCORPORATED • Job No: 300100-000-01ot Client:LoveLaAol Reaolu-MLKpage 4 at 13 Task: t cvtvt, P1± H-HoiroLorj J Computed By: j. CuLLor Date: 03/23/22 Checked By: T. neges Date: 03/23/22 Calculations (cont'd): 2. Historic Peak Runoff Rates: a. 5 -year 1 -hour historic peak runoff rates were calculated for each basin to define the maximum developed release rates of the gravel pits b. As per USR Drainage Requirements, the Rational Method Peak Runoff Prediction Workbook as provided by the county was used to calculate the historic peak runoff from the basins during the 5 -year 1 -hour precipitation event. Urban Drainage workbook version 1.02a was downloaded from: https://www.weldgov.com/Government/Departments/Planning-and- Zoning/Development-Review c. Required workbook parameters for historic conditions were entered into the spreadsheet including: I. Basin area (calculations 1.a), ii. Percent imperviousness (2.0%; data and assumptions 1.c) iii. NRCS soil type (data and assumptions 4.a.ii; note: since a majority of the site was HSG D and the Rational Method calculations treat HSG C and D the same, HSG D was used for both basins) iv. Design storm return period (data and assumptions 1.b) v. Design storm precipitation depth (data and assumptions 4.b.ii) d. Time of concentration flow paths and slopes for historic runoff were derived by dividing each basin into three hydrologic components: overland flow, channelized flow (pasture), and channelized flow (waterway). i. Overland flow distance = 500 feet ii. Channelized flow (pasture) distance = Distance from end of overland flow to waterway iii. Channelized flow (waterway) distance = Distance from end of channelized flow (pasture) to basin outlet iv. Channelized flow (pasture) conveyance factor (K) = 7.0 (Table 6-2 Urban Storm Drainage Criteria Manual Volume 1, Chapter 6) v. Channelized flow (waterway) conveyance factor (K) = 15.0 (Table 6-2 Urban Storm Drainage Criteria Manual Volume 1, Chapter 6) vi. Slopes were derived from start to end of flow path elevations of existing (pre - development) terrain e. As per USR Drainage Criteria guidance and Urban Drainage Storm Drainage Manual (Volume 1, Chapter 6, 2.4.3), computed times of concentration, although higher, were chosen over the regional times of concentration for historic runoff since impervious values were below 20% (data and assumptions 2.b) f. Completed Rational Method Workbook sheets detailing the inputs and outputs for the historic runoff calculations are shown on the following two pages i. Calculated 5 -year 1 -hour historic runoff rates: • North Basin = 5.15 cfs • South Basin = 8.10 cfs TELESIS SOLUTIONS. INCORPORATED a. Job No: 3&0100-00c-oi.d Client:LoVtLaAtol Readu-MLXPage 5 o,f 13 Task: T)u.v4v4 P1± H-HoiroLoSU Computed By: j. avlor Date: 03/23/22 Checked By::T. T't ges Date: 03/23/22 Calculation Con'd: CALCULATION OF A PEAK RUNOFF USING RATIONAL METHOD Project Title: Catchment ID: Dunn Pit North Basin (Cell C1) - 5yr-1 hr I. Catchment Hydrologic Data Catchment ID = Area = Percent Imperviousness = NRCS Soil Type = North 61.25 Acres 2.00 % D A, B, C, or D For catchments larger than 90 acres, CUHP hydrograph and routing are recommended. Clear Worksheet II. Rainfall Information I (inch/hr) = C1 * P1 /(C2 + Td)^C3 Design Storm Return Period, Tr = 01 = C2= C3= P1= 5 28.50 10.00 0.786 1.11 years (input return period for design storm) (input the value of C1) (input the value of C2) (input the value of C3) inches (input one -hr precipitation --see Sheet "Design Info") Click here to accept Denver area default values for C1, C2, & C3 III. Analysis of Flow Time (Time of Concentration) for a Catchment Runoff Coefficient, C = Overide Runoff Coefficient, C = 5-yr. Runoff Coefficient, C-5 = Overide 5-yr. Runoff Coefficient, C = 0.16 0.16 Reach 3 (enter an overide C value if desired, or leave blank to accept calculated C.) (enter an overide C-5 value if desired, or leave blank to accept calculated C-5.) Illustration Reach Reach 1 overland flaw LEGEND O Beginning Flew Direr-tion C ate lime nt undary Land Type Conveyance Heavy Meadow 2.5 Tillage/ Field 5 Short Pasture/ Lawns 7 Nearly Bare Ground 10 Grassed Swales/ Waterways 15 Paved Areas & Shallow Paved Swales (Sheet Flow) 20 Calculations: Clear Table Reach ID Overland Slope S ft/ft input Length L ft input 5-yr Runoff Coeff C-5 output NRCS Convey- ance input Flow Flow Velocity Time V Tf fps minutes output output 0.0040 500 0.16 N/A 0.16 51.18 1 0.0050 2,775 2 0.0016 1,220 3 4 5 Sum 4,495 IV. Peak Runoff Prediction Rainfall Intensity at Computed Tc, I = Rainfall Intensity at Regional Tc, I = Rainfall Intensity at User -Defined Tc, I = 0.51 1.59 inch/hr inch/hr inch/hr 7.00 0.49 93.44 15.00 0.60 33.89 Computed Tc dr 178.50 Regional Tc = 34.97 User -Entered Tc = Peak Flowrate, Qp = Peak Flowrate, Qp = Peak Flowrate, Qp = 5.15 15.88 cfs cfs cfs a. TELESIS SOLUTIONS. INCORPORATED a. Job No: 3&0100-00c-oi.d Client:LoveLavkd Readu-MLKpage f 13 Task: r)u.ltiw P1± H-HoiroLoSU Computed By: j. avlor Date: 03/23/22 Checked By::T. T't ges Date: 03/23/22 Calculation Con'd: CALCULATION OF A PEAK RUNOFF USING RATIONAL METHOD Project Title: Catchment ID: Dunn Pit South Basin (Cells C2 & C3) - 5yr-lhr I. Catchment Hydrologic Data Catchment ID = Area = Percent Imperviousness = South 101.48 2.00 0/0 Acres NRCS Soil Type = D A, B, C, or D Clear Worksheet For catchments larger than 90 acres, CUHP hydrograph and routing are recommended. II. Rainfall Information I (inch/hr) = Cl * P1 /(C2 + Td)AC3 Design Storm Return Period, Tr = 01= C2= 10.00 C3= 0.786 P1= 5 28.50 1.11 years (input return period for design storm) (input the value of C1) (input the value of C2) (input the value of C3) inches (input one -hr precipitation --see Sheet "Design Info") Click here to accept Denver area default values for C1, C2, & C3 III. Analysis of Flow Time (Time of Concentration) for a Catchment Runoff Coefficient, C = Overide Runoff Coefficient, C = 5-yr. Runoff Coefficient, C-5 = Overide 5-yr. Runoff Coefficient, C = 0.16 0.16 'trail 3 (enter an overide C value if desired, or leave blank to accept calculated C.) (enter an overide C-5 value if desired, or leave blank to accept calculated C-5.) Illustration Reach 1 Reach 2 .0` o erland. flaw 4 LEGEND a Beginning lin r -g Flow Direction 4- Cate lunent Bound NRCS Land Type Conveyance Heavy Meadow 2.5 Tillage/ Field 5 Short Pasture/ Lawns 7 Nearly Bare Ground 10 Grassed Swales/ Waterways 15 Paved Areas & Shallow Paved Swales (Sheet Flow) 20 Calculations: Clear Table Reach ID Overland Slope S ft/ft input Length L ft input 5-yr Runoff Coeff C-5 output NRCS Convey- ance input Flow Velocity V fps output 0.0045 500 0.16 N/A 0.17 1 0.0051 2,500 2 0.0014 1,975 3 4 5 Sum 4,975 IV. Peak Runoff Prediction Rainfall Intensity at Computed Tc, I = Rainfall Intensity at Regional Tc, I = Rainfall Intensity at User -Defined Tc, I = 0.49 1.52 inch/hr inch/hr inch/hr 7.00 0.50 15.00 0.56 Flow Time Tf minutes output 49.22 83.35 58.65 Computed Tc = 191.22 Regional Tc = 37.64 User -Entered Tc = Peak Flowrate, Qp Peak Flowrate, Qp = Peak Flowrate, Qp = 8.10 25.14 cfs cfs cfs a. TELESTQ SOLUTIONS• INCORPORATED Job N o : 3 00100-00O -01ot Client:LoveLamol Readu-MLXpage 7 ,,f 13 Task: I.uvtvt, P1± H-HoiroLorj J Computed By: j. CuLLor Date: O3/23/22 Checked By: T. neges Date: O3/23/22 Calculations (cont'd): 3. Developed Peak Runoff Rates, Hydrographs, and Volumes: a. Developed 100 -year 1 -hour peak runoff rates, runoff hydrographs and volumes were calculated so that the design event could be routed through the basins, and pit hydraulic structures could be designed b. The Rational Method Peak Runoff Prediction Workbook was again used for developed peak runoff calculations c. Required workbook parameters for developed conditions were entered into the spreadsheet including: i. Basin area (calculations 1.a), ii. NRCS soil type (data and assumptions 4.a.ii) iii. Design storm return period (data and assumptions 2.a) iv. Design storm precipitation depth (data and assumptions 4.b.iii) d. Area -weighted runoff coefficients were derived using the Rational Method Workbook by entering runoff coefficients and areas for naturally vegetated and water surface areas. Specifically: i. Percent imperviousness for naturally vegetated areas of 2.0% was retained from historic runoff calculations (data and assumptions 1.c) ii. Percent imperviousness for water surface areas were assumed to be 100% (data and assumptions 2.b) iii. Percent imperviousness's, NRCS soil types and design storm return period were used in conjunction with the Rational Method Workbook runoff coefficient equations to calculate runoff coefficients for each surface type. Workbook runoff coefficient equations are as follows: Basic equation for NRCS Soil Types C & D: } +CD = K CD (0.8581:13 - 0.786 *r ` 0.774 "°t — 0.04) NRCS Soil Types Values of Correction Factors K a ' & K4 Storm Return Period 2- r 5-�ir 1. 10-yr 5- ,ar 50-�,0r 100-yr _. IL D 0_0I) 1 1[0.1s*:- [ C_ l':jx1 ±o.a a] 1 --ICI.s1] [0.28$7+0.331 1j [ (.~ *1 -0. 1(1'] 1 [-C.�9}.1 mil. I6] A �0I 00I 0_0•�I*i±O ►0 Q.14xj—�_�.17 0_19*i+O 4 _2.2*i+0.2 _0 +0.3] 32] area specific calculated runoff coefficients were area -weighted by entering the values calculated under step 3.d. into the Rational Method Workbook. Area -weighted runoff coefficient calculations are shown on the following two pages. Surface Job No: 3&oioo-oo&-01.Di Client:Lover-awd Reaol J-MIXPage 2 of lj I S 9 Task: Du.ww Pit H-HaroLogH au.l,tor Date: o9/2 S/22 Computed By: j. S O L U T I O N S* I N C O R P O RAT E D Checked By: T. 11 es £.J°/23/22 Date: Calculations (cont'd): Area -Weighting for Runoff Coefficient Calculation Project Title: Dunn Pit Catchment ID: North Basin Proposed 100yr hr Runoff - -1 Illustration et v.. ttrafeirt - LEGEND: Catchm.ent Ice Boundary Instructions: For each catchment subarea, enter values for A and C. Subarea Area Runoff Product ID Coeff. acres A C* CA input input input output pit (c1) 38.34 0.96 36.65 22.91 0.51 11.62 pasture sum: 61.25 sure: 48.28. Area Runoff Coefficient (sum CA/sum A) =1 0.79 -Weighted *See sheet "'Desi€gn Info" for inperviousness-based runoff coefficient values. r Job No: s&oioo-oo&-01.Di Client:Lover-awd R.eaollJ-MIXPage j of lj I S 9 Task: Du.ww Pit frtuolroLogH au.l,tor Date: S/22 Computed By: j. q9/2 S O L U T I O N S• I N C O R P O RAT E D Checked By: T. T'zoigges £.J°/23/22 Date: Calculations (cont'd): Area -Weighting for Runoff oe icient Calculation Project Title: Dunn Pit Catchment ID: South Basin - Proposed Myr -1 hr Runoff Illustration r 1r LY 1i'i.Nii' ■ Flow Direction 4 I Sra Catchment Subs e T Bad Instructions. For each catchment subarea, enter values for A and C. Subarea Area Runoff Product ID acres Coe f. A C* CA input input input output pit (c2) 12.14 0.96 11.6 pit (c3) 29.09 o_96 27.81 pasture 60.25 0.51 30.57 sum: 101.4 sum: 69.99 Area -Weighted Runoff Coefficient (sum CAlsum Al = 0.69 *See sheet "Design Info" for inperviousness-based runoff coefficient values. TELESIS SOLUTIONS. INCORPORATED Job No: 3&0100-00c-oid Client:LoveLav�d Readu-MLXpage 10 o,f 13 Task: I k.vtvt P1± H-HoiroLoSU Computed By: j. avlor Date: 03/23/22 Checked By: .r. T i-eges Date: 03/23/22 Calculations (cont'd): e. Time of concentration flow paths and slopes for developed runoff were again derived by dividing each basin into three hydrologic components: overland flow, channelized flow (pasture), and channelized flow (waterway). i. Overland flow distance = 500 feet ii. Channelized flow (pasture) distance = Distance from end of overland flow to waterway iii. Channelized flow (waterway) distance = Distance from end of channelized flow (pasture) to basin outlet iv. Channelized flow (pasture) conveyance factor (K) = 7.0 (Table 6-2 Urban Storm Drainage Criteria Manual Volume 1, Chapter 6) v. Channelized flow (waterway) conveyance factor (K) = 15.0 (Table 6-2 Urban Storm Drainage Criteria Manual Volume 1, Chapter 6) vi. Slopes were derived from start to end of flow path elevations of existing (pre - development) terrain f. As per the Urban Storm Drainage Criteria Manual, regional times of concentration were selected over computed times of concentration since they were the lower of the two values (Volume 1, Chapter 6, 2.4.3) g. Completed Rational Method Workbook sheets detailing the inputs and outputs for the historic runoff calculations are shown on the following two pages i. Calculated 100 -year 1 -hour developed peak runoff rates: • North Basin = 191.37 cfs • South Basin = 265.12 cfs TELESTQ SOLUTIONS. INCORPORATED Job No: 360100-006-01a Task: Du.ww Pit-tl�olroLOS H Client:Lover-owl •z.eaollJ-MiXPage 11 of lj Computed By: J. Cu.l,lor Date: 0:9/2:V22 Checked By: T. T'zoigges Date: 09/23/22 Calculation Con'd: CALCULATION OF A PEAK RUNOFF USING RATIONAL METHOD Project Title: Catchment ID: Dunn Pit North Basin (Cell Cl) -10Oyi►r-lhr I. Catchment Hydrologic Data Catchment ID = Area = Percent Imperviousness = North 61.25 Acres of JO NRCS Soil Type = D A, B, C, or D Clear Worksheet For catchments larger than 90 acres, CUHP hydrograph and routing are recommended. II. Rainfall Information I (inch/hr) = Cl * P1 1(02 + Td)AC3 Design Storm Return Period, Tr = C1_ C2= C3= P1= 100 28.50 10.00 0.786 2.77 years (input return period for design storm) (input the value of C1) (input the value of C2) Click here to accept Denver area (input the value of C3) default values for Cl, C2, . . C3 inches (input one -hr precipitation —see Sheet "Design Info"') III. Analysis of Flow Time (Time of Concentration) for a Catchment Runoff Coefficient, C = Overide Runoff Coefficient, C = 5-yr_ Runoff Coefficient, 0-5 = Overide 5-yr_ Runoff Coefficient, C = 0.16 0.79 0.16 (enter an overide C value if desired, or leave blank to accept calculated C.) (enter an overide C-5 value if desired, or leave blank to accept calculated C-5_) Illustration LEGEND O BBC new Direction Catchment Boundary NRCS Land Type Heavy Meadow Tillage! Field Short Pasture/ Lawns Nearly Bare Ground Grassed Swales! Waterways Paved Areas & Shallow Paved Swales (Sheet Flow) Conveyance 2.5 5 7 10 15 20 Calculations: Clear Table Reach Slope ID S Wit input Length L ft input 5-yr Runoff Coeff C-5 output NRCS Convey- ance input Flow Velocity V fps output Flow Time Tf minutes output Overland 0.0040 500 0.16 N/A 0.16 51.18 1 0.0050 2.775 2 0.0016 1,220 3 4 5 Sum 4,495 IV. Peak Runoff Prediction Rainfall Intensity at Computed Tc, I = Rainfall Intensity at Regional Tc, I = Rainfall Intensity at. User -Defined Tc, I = 1.29 3.96 inch/hr inch/hr inchlhr T00 0.49 93.44 15.00 0..60 33.89 Computed Tc = 178.50 Regional Tc = User -Entered Tc = Peak Flowrate. Gip = Peak Flowrate, Qp = Peak Flowrate, Qp = 34.97 62.04 191.37 #VALU E! cfs cfs cfs Use Regioi r TELESTQ SOLUTIONS. INCORPORATED Job No: 360100-006-01a Task: Du.ww Pit-tl�olroLOS H Client:Lover-owl •z.eaollJ-MiXPage 12 of lj Computed By: J. Cu.l,lor Date: 0J°/2 S/22 Checked By: T. T'zoigges Date: £.J°/?3/22 Calculation Con'd: CALCULATION OF A PEAK RUNOFF USING RATIONAL METHOD Project Title: Catchment ID: Dunn Pit South Basin (Cells C2 & C3) -1&Qtr-1hr I. Catchment Hydrologic Data Catchment ID = Area = Percent Imperviousness = South 10t48 Acres of JO NRCS Soil Type = D A, B, C, or D Clear Worksheet For catchments larger than 90 acres, CUHP hydrograph and routing are recommended. II. Rainfall Information I (inchlhr) = Cl * P1 1(02 + Td}AC3 Design Storm Return Period, Tr = C1_ C2= C3= P1= 100 28.50 10.00 0.786 2.77 years (input return period for design storm) (input the value of C1) (input the value of C2) Click here to accept Denver area (input the value of C3) default values for Cl, C2, .. C3 inches (input one -hr precipitation —see Sheet "Design Info"') III. Analysis of Flow Time (Time of Concentration) for a Catchment Runoff Coefficient, C = Overide Runoff Coefficient, C =I 5-yr. Runoff Coefficient, 0-5 = Overide 5-yr_ Runoff Coefficient, C = 0.16 0.69 0.16 (enter an overide C value if desired, or leave blank to accept calculated C_) (enter an overide C-5 value if desired, or leave blank to accept calculated C-5_) Illustration LEGEND O BBC new Direction Catchment Boundary NRCS Land Type Heavy Meadow Tillage! Field Short Pasture/ Lawns Nearly Bare Ground Grassed Swales! Waterways Paved Areas & Shallow Paved Swales (Sheet Flow) Conveyance 2.5 5 7 10 15 20 Calculations: Clear Table Reach Slope ID S Wit input Length L ft input 5-yr Runoff Coeff C-5 output NRCS Convey- ance input Flow Velocity V fps output Flow Time Tf minutes output Overland 0.0045 500 0.16 N/A OA 7 49.22 1 0.0051 2.500 2 0.0014 1,975 3 4 5 Sum 4,975 IV. Peak Runoff Prediction Rainfall Intensity at Computed Tc, I = Rainfall Intensity at Regional Tc, I = Rainfall Intensity at. User -Defined Tc, I = t22 3.79 inch/hr inch/hr inchlhr T00 0.50 8.3.35 15.00 0.56 58.65 Computed Tc = 191.22 Regional Tc =I 37.64 I Use Regioi User -Entered Tc = Peak Flowrate. Gip = Peak Flowrate, Qp = Peak Flowrate, Qp = 85.44 265.12 #VALU E! cfs cfs cfs r TELESTQ SOLUTIONS• INCORPORATED Job N o : 3001_00-000-0ioi Client:LoveLamol Readu-MLXpage 13 ,,f 13 Task: t cvtvt, P1± H-HoiroLorj J Computed By: j. CuLLor Date: 03/23/22 Checked By: .T. Tideges Date: 03/23/22 Calculations (cont'd): h. Developed 100 -year 1 -hour runoff hydrographs were calculated for each basin so that runoff could be routed to the basin outlets for hydraulic structure sizing. Since the Rational Method Workbooks didn't have hydrograph calculation capabilities, this analysis chose the Standard Rational Hydrograph Method. This method uses the times of concentration, peak discharge rates and runoff coefficients from the Rational Method peak runoff calculations to develop triangular runoff hydrographs. Since the developed runoff coefficients for the North Basin was grater than 0.75, a receding limb factor of 1 was used for the basin. A receding limb factor of 1.33 was used for the South Basin. Runoff hygrographs are shown on the following page. Standard Rational Method The Standard Rational method simply computes the peak flow, Op = CIA_ The resulting hydrograph is an isosceles triangle. 30 Time (min) 9!;.ndard Rational method hydrographs peak al time, Tc and have a total duration equal to 2 x Tc. Ascending Limb (AL) You can specify an ascending limb factor as a multiple of Tc. This value will place the Time to Peak equal to Tc x AL. Unless you have a special situation that warrants this to be different, leave as 1.0, the default. Receding Limb (RL) This value extends the receding side of the hydrograph to Tc x RL. The default is 1.0 which produces the hydrograph as shown above. Below are suggested Receding Limb factors which are based on the runoff coefficient Receding Limb Factors for the Rational Method Runoff Coefficient (C) Suggested Receding Limb Factor 0/5 - 1.0 1 0_50 - 0.75 0.30 - 0.50 <0.30 1. 3 1.5 1 Job No: 300100-000-01c Client:LoveLRV4 Reaol -MXpa �L g e 14 of I . ..9 S (ID Task. i)u.ww PLt H-HoiroLoSU CuLLor Date: O3/23/22 Computed By: j. SOLUTIONS. INCORPORATE ID Checked By: .T. Tiges Date: 03/23/22 i Calculation Con'd: North Basin Runoff Hydrograph 200 190 180 170 160 150 140 130 120 110 - 100 Cr 90 80 70 60 50 40 30 20 10 0 0 5 10 15 20 25 30 Time 35 40 (min) 45 50 55 60 65 70 South 280 Basin Runoff Hydrograph 260 240 220 - i 200 180 160 ♦ 140 ;' O 120 100 80 -1- 60 40 1_ 20 4 4 4 0--- I 11 0 5 10 15 20 25 30 35 40 Time 45 50 55 60 65 70 75 80 85 90 (min) I TELESTQ SOLUTIONS• INCORPORATED Job No: 300100-00o-01ot Client LoveLaA-ol Readu-MIXPage 15 )f 13 Task: t cvtvt, P1± H-HoiroLorj J Computed By: j. CuLLor Date: 03/23/22 Checked By: T. fleets Date: 03/23/22 Calculations (cont'd): i. Developed 100 -year 1 -hour runoff volumes were calculated by summing up the areas under the curves. i. Calculated 100 -year 1 -hour developed runoff volumes: • North Basin = 401,526 cu. ft. • South Basin = 697,534 cu. ft. 4. Stage -Storage Relationships a. Stage -storage relationships were developed for pit cells C1 and C3 in order to determine how the developed runoff hydrographs would affect water elevations in the pits and in turn to size the associated outlet hydraulic structures. A stage -storage relationship was not developed for cell C2 because its water surface is controlled by an adjustable outlet weir (Detail B) which discharges to cell C3. The cell C2 water surface at the time of the runoff event should be at the elevation of the outlet. Therefore, cell C2 has no effective storage and for simplicity this analysis assumes that the runoff hydrograph will be passed instantaneously from cell C2 to cell C3. b. As shown in the Stormwater Management Plan Sheet 2 of the Drainage Narrative the predicted post -mining static water surface elevation of cell C1 is expected to be 4,737.5 ft and the post -mining static water surface elevations of cells C2 and C3 are expected to be 4,735.0 ft. Also, as shown on Sheet 2, the crest elevation of the cell C1 adjustable outlet weir (Detail A) will be 4,737.5 ft. Therefore, cell C1 has no effective storage and the incoming flood hydrograph will immediately cause discharges from the pit. Sheet 2 also shows that the riprap inlet/outlet weir of cell C3 is at an elevation of approximately 4,740.0 ft and 5 ft higher than the expected static water surface elevation in the pit. Therefore, cell C1 has 5 feet of effective storage before the incoming flood hydrograph will discharge to the river. c. Stage -storage relationships for cells C1 and C3 were developed in ACAD using the Site's mine plan. The cell C1 stage -storage relationship only shows the region above the outlet weir crest this cell has no effective storage. The cell C3 stage storage - storage relationship shows elevations from the expected static water surface to the riprap inlet/outlet weir. Stage -storage relationships are shown on the next page. TELESIS SOLUTIONS. INCORPORATED a. Job No: 3&0100-00c-oid Client:LoveLavt4 Reaolu-MI,Xpage 1_0 f 13 Task: r)u.v414 P1± H-HoiroLoSU Computed By: j. Cu%f,or Date: 03/23/22 Checked By: T. T ideges Date: 03/23/22 Calculation Con'd: 4713 4 Q 3.0 2.5 2.0 1.5 1.0 0.5 0.0 4. 0 Cell Cl Stage -Storage Relationship • • • • Mk • a • • d / • ♦ ♦ • • • Y -9.: 0 ♦ 0 ♦ I I s • a • 19810E -15x2 + R2 = 9.9998'. • s • .• • ♦• 7.58344E -07x ) E-01 0 I • es ♦ • 500,000 1,000,000 1,500,000 2,000,000 2,500,000 3,000,000 3,500,000 4,000,000 Storage Above Weir Crest (cu. ft.) 0.0 - 1.0 - 5.0 - 6.0 0 Cell C3 Stage -Storage Relationship Storage Below Weir Crest (cu. ft.) 1,000,000 2,000,000 3,000,000 4,000,000 5,000,000 6,000,000 7,000,000 a Se • / ♦ • I I • • ♦ ♦ • . / a • • / • ♦ • • • P Y • • • • = 9E -07x - 4.972 R2= 0.9999 • • • 0 • • • •• / Is • ♦ • • I a I TELESIS SOLUTIONS. INCORPORATED Job No: 3&0100-00c-oid Client:LoveLavkol Readu-MLXpage f 13 Task: r)k.v4v4 P1± H-HoiroLoSU Computed By: j. avlor Date: 03/23/22 Checked By: .r. TJt ges Date: 03/23/22 Calculations (cont'd): 5. Pit Flood Routing and Hydraulic Structure Design a. The cell C3 developed 100 -year 1 -hour runoff volume as presented in calculations 3.1 was 697,534 cu. ft. Since the effective storage below the riprap inlet/outlet weir in cell C3 is 5,750,000 cu. ft. (calculations 4.c) there will be no expected runoff from the South Basin into the Big Thompson River as a result of the 100 -year 1 -hour storm event. Therefore, no hydraulic outlet structures are required on cell C3 to limit the pit discharge to the 5 -year 1 -hour peak runoff rate as determined in calculations 2.f. b. The cell C1 pit stage -storage relationship was used in conjunction with the rectangular contracted weir equation to route the developed 100 -year 1 -hour runoff hydrograph through the pit and to size the pit outlet weir. The contracted weir equation is as follows: The Equation used _' d -et rn-line the flow rate I4:2) a ofRectangular Contract = 3.247 ' L H1' O.566L1.9 P d A 1 ere: Q = Flow date in cfs. L _ Bottom width of the weir in feet. = HeiIcai l` of the upstream water above the weir crest in feet. L1'87 NOW i. The maximum discharge rate used in the weir discharge equation was 5.15 cfs as determined in calculations 2.f ii. The height above the weir crest was determined by relating the inflow hydrograph with the stage -storage relationship and by using the continuity equation as follows: Qin Q0ut o Storage iii. The width of the outlet weir was varied until the discharge rate was less than 5.15 cfs. Calculations are presented on the following page. iv. The resulting chosen weir width was 4.0 ft corresponding to a discharge of 2.16 cfs. This discharge occurred at the maximum pool height of 0.30 ft above the weir crest. A weir width of 4.0 feet was chosen over a wider width because it would limit the size of the downstream weir box. Since cell C1 has 3.5 ft or 3,500,000 cu. ft. of effective storage above the weir crest, the loss of discharge capacity resulting from a 4.0 ft weir width was determined to not be of concern. TELESIS SOLUTIONS. INCORPORATED Job No: 3&0100-00c-oid Client:LoveLav�d Readu-MLXpage 1 o,f 13 Task: r)u.1414 P1± H-HoiroLoSU Computed By: j. avlor Date: 03/23/22 Checked By: .r. TJt ges Date: 03/23/22 Calculations (cont'd): Bottom Width of Weir Maximum Storage Inflow Volume Maximum Height Above Weir Crest Outflow Volume 4.00 ft 397,613 cu. ft. 401,575 cu. ft. 0.30 ft 401,117 cu. ft. Maximum Weir Discharge Rate 2.16cfs Time (min) Cell C1 Inflow Rate (cfs) Cell C1 Incremental Inflow Volume (cu. ft.) Cell C1 Cumulative Cell C1 Cell C1 Inflow Volume WS Height Above Weir Discharge Rate (cu. ft.) Weir Crest (ft) (cfs) *max discharge of 5.15 cfs from 5yr 1hr event Cell C1 Incremental Outflow Volume (cu. ft.) Cell C1 Cumulative Outflow Volume (cu. ft.) Cell C1 Storage Above Weir Crest (cu. ft.) 5 27.4 8,208 8,208 0.006 0.007 0 0 8,208 10 54.7 16,417 24,625 0.019 0.036 10.7 10.7 24,615 15 82.1 24,625 49,251 0.037 0.099 29.8 40.6 49,210 20 109.4 32,834 82,085 0.062 0.211 63.4 104 81,981 25 136.8 41,042 123,127 0.093 0.384 115 219 122,908 30 164.2 49,251 172,378 0.130 0.630 189 408 171,970 35 191.4 57,410 229,788 0.173 0.962 288 697 229,091 40 163.8 49,152 278,940 0.210 1.277 383 1,080 277,861 45 136.5 40,944 319,884 0.241 1.560 468 1,548 318,336 50 109.1 32,735 352,620 0.265 1.798 539 2,087 350,532 55 81.8 24,527 377,147 0.283 1.981 594 2,682 374,465 60 54.4 16,318 393,465 0.295 2.104 631 3,313 390,152 65 27.0 8,110 401,575 0.301 2.163 649 3,962 397,613 70 0 0 401,575 0.300 2.158 647 4,609 396,966 75 401,575 0.300 2.153 646 5,255 396,320 80 401,575 0.299 2.148 644 5,899 395,676 85 401,575 0.299 2.143 643 6,542 395,033 90 401,575 0.298 2.138 641 7,183 394,392 95 401,575 0.298 2.132 640 7,823 393,752 100 401,575 0.297 2.127 638 8,461 393,114 105 401,575 0.297 2.122 637 9,098 392,477 110 401,575 0.296 2.117 635 9,733 391,842 115 401,575 0.296 2.112 634 10,367 391,208 120 401,575 0.295 2.107 632 10,999 390,576 125 401,575 0.295 2.102 631 11,630 389,945 130 401,575 0.294 2.097 629 12,259 389,316 135 401,575 0.294 2.092 628 12,887 388,688 140 401,575 0.293 2.087 626 13,513 388,062 145 401,575 0.293 2.082 625 14,138 387,438 150 401,575 0.292 2.078 623 14,761 386,814 155 401,575 0.292 2.073 622 15,383 386,192 160 401,575 0.291 2.068 620 16,003 385,572 165 401,575 0.291 2.063 619 16,622 384,953 170 401,575 0.291 2.058 617 17,239 384,336 175 401,575 0.290 2.053 616 17,855 383,720 180 401,575 0.290 2.048 614 18,470 383,105 185 401,575 0.289 2.044 613 19,083 382,492 190 401,575 0.289 2.039 612 19,694 381,881 195 401,575 0.288 2.034 610 20,305 381,271 200 401,575 0.288 2.029 609 20,913 380,662 205 401,575 0.287 2.024 607 21,521 380,055 210 401,575 0.287 2.020 606 22,127 379,449 215 401,575 0.286 2.015 604 22,731 378,844 a. TELESTQ SOLUTIONS• INCORPORATED • Job No: 300100-00o-01ot Client:LoveLamol Readu-MIKpage 13 ,,f 13 Task: I.uvtvt, P1± H-HoiroLorj J Computed By: j. CuLLor Date: 03/23/22 Checked By: T. fleets Date: 03/23/22 Results and Discussion: 1. It was determined that cell C3 of the South Basin has adequate storage capacity to retain the 100 -year 1 -hour runoff event without discharge to the Big Thompson River. Therefore, no pit outlet hydraulic structures are required to limit the South Basin discharge to less that the historic 5 -year 1 -hour peak runoff rate. 2. It was determined that the cell C1 outlet weir of the North Basin needed to be sized to limit the 100 -year 1 -hour runoff rate to less than the historic 5 -year 1 -hour peak runoff rate. A weir width of 4.0 ft was chosen for this structure. Conclusions and Recommendations: 1. The calculation set achieved the objectives of meeting the requirements of the Weld County Storm Drainage Criteria and the USR Drainage Requirements 2. The pit designs and hydraulic structures detailed in the Stormwater Management Plan Sheet 2 of the Drainage Narrative are designed and sized to meet these regulatory requirements References: NOAA Atlas 14 (2022). Web application. https://hdsc.nws.noaa.gov/hdsc/pfds/pfds map cont.html NRCS Web Soil Survey (2022). Web application. https://websoilsurvey.sc.egov.usda.gov/App/WebSoilSurvey.aspx Urban Drainage and Flood Control District (2005). Peak Runoff Prediction by the Rational Method. Excel spreadsheet Version 1.02a. Released August 2005. Urban Drainage and Flood Control District (2017). Urban Storm Drainage Criteria Manual Volume 1, Chapter 5 Rainfall. March. Urban Drainage and Flood Control District (2018). Urban Storm Drainage Criteria Manual Volume 1, Chapter 6 Runoff. August. Weld County (2019). Weld County, CO Charter and County Code Article XI. — Storm Drainage Criteria. Downloaded 11/16/21. Weld County (2021). Use by Special Review (USR) Drainage Requirements. September 10. 40° 21' 10" N 40° 20' 20" N 104° 52' 49" W y 104° 52' 49" V1/ 510400 Hydrologic Soil Group —Weld County, Colorado, Southern Part (PropertyBoundary_DunnPit_FromMinePlan) 510500 510600 510700 510200 510300 Soil Map ma no Map Scale: 1:7,480 if printed on A portrait (8.5" x 11") sheet. 0 100 200 400 510800 510900 Meters 600 Feet 0 350 700 1400 2100 Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84 511000 511100 511200 04° 52' 0" W 511300 S 3 C Ln 40° 21' 10" N 40° 20' 20" N �,M Natural Resources —ls Conservation Service Web Soil Survey National Cooperative Soil Survey 9/13/2022 Page 1 of 4 10-40 Hydrologic Soil Group —Weld County, Colorado, Southern Part (PropertyBoundary_DunnPit_FromMinePlan) MAP LEGEND Area of Interest (AO!) Area of Interest (A01) ) Soils Soil Rating Polygons A A/D B B/D C C/D D Not rated or not available Soil Rating Lines A A/D B B/D C C/D D Not rated or not available Soil Rating Points O O O A A/D B B/D MAP INFORMATION C The soil surveys that comprise your AOI were mapped at 1:24,000. C/D D Not rated or not available Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background ,; Aerial Photography Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Weld County, Colorado, Southern Part Survey Area Data: Version 20, Aug 31, 2021 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jun 8, 2021 Jun 12, 2021 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. ,b Natural Resources lain Conservation Service Web Soil Survey National Cooperative Soil Survey 9/13/2022 Page 2 of 4 Hydrologic Soil Group —Weld County, Colorado, Southern Part PropertyBoundary_DunnPit_FromMi nePlan Hydrologic Soil Group Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 3 Aquolls gravelly and Aquents, substratum D 107.1 92.7% 64 Thedalund loam, percent slopes 1 to 3 C 3.2 2.8% 85 Water 5.2 4.5% Totals for Area of Interest 115.6 100.0% Description Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long -duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, BID, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink -swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or CID), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. e Natural Resources Web Soil Survey Conservation Service National Cooperative Soil Survey 9/13/2022 Page 3of4 Hydrologic Soil Group —Weld County, Colorado, Southern Part PropertyBoundary_DunnPit_FromMi nePlan Rating Options Aggregation Method: Dominant Condition Component Percent Cutoff. None Specified Tie -break Rule: Higher e Natural Resources Web Soil Survey Conservation Service National Cooperative Soil Survey 9/13/2022 Page 4of4 NOAA Atlas 14, Volume 8, Version 2 Location name: Johnstown, Colorado, USA* Latitude: 40.3428°, Longitude: -104.8716° Elevation: 4739.8 ft** * source: ESRI Maps ** source: USGS POINT PRECIPITATION FREQUENCY ESTIMATES Sanja Perica, Deborah Martin, Sandra Pavlovic, Ishani Roy, Michael St. Laurent, Carl Trypaluk, Dale Unruh, Michael Yekta, Geoffery Bonnin NOAA, National Weather Service, Silver Spring, Maryland PF tabular I PF graphical I Maps & aerials PF tabular PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches)1 Duration 5 -min 0.240 (0.188-0.307) 10 -min 15 -min 0.351 (0.275-0.449) 0.428 (0.336-0.548) 30 -min I 0.572 32) 60 -min 2 -hr 3 -hr 6 -hr 0.708 (0.555-0.907) 0.845 (0.668-1.07) 0.927 (0.737-1.17) 1.09 (0.873-1.36) 12 -hr 24-hr_i 2 -day 3 -day 4 -day 7 -dart 10 -day 20 -day 1.28 (1.03-1.58) 1.53 (1.25-1.87) 1.77 (1.46-2.13) 1.93 1.60-2.31) 2.06 (1.71-2A5) 2.34 (1.96-2.76) 0.288 (0.226-0.369) 0.422 (0.330-0.541) 0.514 (0.403-0.659) 0.686 (0.537-0.879) 1 0.839 0.657-1.08) 0.992 (0.784-1.26) 1.08 (0.857-1.36) L1.27 (1.01-1.58 1.52 (1.23-1.87) 5 0.385 (0.300-0.494) 0.563 (0.440-0.724) 0.687 (0.536-0.883) 0.914 (0.714-1.18) 1.11 (0.867-1.43) 1.31 1.03-1.66) 1.41 (1.12-1.79) Average recurrence interval (years) 10 0.481 (0.374-0.622) 0.705 0.547-0.911) 0.859 (0.667-1.11) 1.14 (0.887-1.48) 1.39 (1.08-1.80) 1.64 (128-2.10) 1.77 (1.39-2.25) 1.65 (1.31-2.06) 1.98 1.59-2.45) 1.81 (1.48-2.21) 2.10 (1.73-2.53) 2.26 (1.87-2.72) 2.40 (1.99-2.86) 2.73 (2.29-3.23) 3.02 (2.54-3.56) 2.32 (1.89-2.84) 2.68 (2.20-3.25) 2.85 (2.35-3.43) 3.00 (2.48-3.59) 3.41 (2.84-4.04) 2.58 3.76 (2.17-3.03) (3.15-4.44) 30 -day j 45 -day 60 -day 3.30 3.82 (2.80-3.83) J (3.24-4.44) i 3.87 (3.30-4.46) 4.54 (3.90-5.21) 5.08 (4.39-5.80) 4.45 (3.80-5.14) 5.23 (4.49-6.00) 5.87 (5.06-6.71) 4.67 (3.95-5.45) 2.05 1.62-2.57) 2.42 (1.94-3.02) 2.80 (2.26-3.44) 3.21 (2.62-3.90) 3.39 2.78-4.09) 3.53 (2.91-4.25) 4.00 (3.31-4.76) 4.39 (3.66-5.20) 5.37 (4.52-6.29) 5.40 (4.59-6.25) 6.32 (5.41-7.27) 7.12 (6.12-8.16) 6.17 (5.22-7.17) 7.21 (6.13-8.32) 8.12 (6.94-9.34) 25 50 0.639 (0.490-0.890) 0.779 (0.578-1.09) 0.935 (0.718-1.30) 1.14 (0.875-1.59) 1.52 (1.17-2.12) 1.86 (1.43-2.61) 2.20 (1.72-3.06) 2.38 (1.87-3.30) 2.72 2.15-3.71) 3.14 2.48-4.16) 3.55 (2.81-4.62) 3.99 (3.18-5.09) 4.18 3.34-5.29) 4.34 (3.48-5.46) 4.84 (3.90-6.00) 5.27 4.26-6.46) 6.33 5.15-7.63) 7.21 (5.89-8.61) 8.38 (6.88-9.91) 9.44 (7.77-11.1) 1.14 (0.847-1.60) 1.39 (1.03-1.95) 1.85 (1.38-2.60) 2.29 (1.70-3.22) 2.72 (2.04-3.79) 2.95 (2.23-4.09) 3.34 2.55-4.57) 3.76 (2.88-5.03) 4.18 (3.23-5.50) 4.64 (3.60-5.99) 4.84 3.77-6.20) 5.00 (3.92-6.37) 5.52 (4.35-6.93) 5.97 4.71-7.42) 7.07 5.63-8.64) 8.00 (6.40-9.69) 9.26 (7.44-11.1) 10.4 (8.40-12.4) 100 0.937 (0.670-1.35) 1.37 (0.980-1.97) 1.67 (1.20-2.41) 2.23 (1.59-3.21) 2.77 (1.98-3.99) 3.31 (2.39-4.72) 3.59 (2.62-5.10) 4.05 2.97-5.66) 4.45 (3.29-6.11) 4.88 (3.63-6.58) 5.34 (4.00-7.07) L5.54 (4.18-7.28) 5.71 (4.32-7.46) 6.23 (4.74-8.02) 6.68 (5.10-8.51) 7.80 6.01-9.77) 8.77 (6.80-10.9) 10.1 (7.87-12.4) 11.3 (8.86-13.8) 200 1.11 (0.762-1.65) 1.63 (1.12-2.41) 1.99 (1.36-2.94) 2.65 (1.81-3.93) 3.31 (2.27-4.92) 3.98 (2.75-5.84) 4.33 (3.02-6.32) L 4.85 3.41-6.97) 5.22 (3.70-7.36) 5.65 (4.03-7.83) 6.09 (4.38-8.29) 6.30 4.56-8.51) 6.47 (4.70-8.69) 6.98 (5.10-9.23) 7.41 (5.44-9.70) 8.54 (6.32-11.0) 9.55 (7.11-12.2) 10.9 (8.19-13.8) 12.2 (9.19-15.3) L 500 1 1.37 (0.901-2.09) 2.01 (1.32-3.06) 2.45 (1.61-3.73) 3.27 (2.15-4.98) 4.12 2.71-6.29) 4.97 (3.30-7.49) 5.44 (3.64-8.14) 6.05 (4.08-8.92) 6.35 (4.31-9.19) 6.75 (4.63-9.62) 7.14 (4.94-10.00) 7.37 (5.13-10.2) 7.54 (5.27-10.4) 8.00 (5.63-10.9) 8.40 5.93-11.3) 9.51 (6.78-12.6) 10.5 (7.57-13.8) 12.0 (8.66-15.6) 13.4 (9.67-17.2) 7 1000 1.59 (1.01-2.42) 2.33 (1.47-3.55) 2.84 (1.80-4.33) 3.79 (2.40-5.78) 4.81 (3.04-7.33) 5.82 (3.72-8.75) 6.38 (4.10-9.52) 7.06 (4.59-10.4) 7.27 4.78-10.6) 7.66 (5.09-11.0) 7.99 (5.37-11.3) 8.23 (5.56-11.5) 8.40 (5.71-11.7) 8.81 (6.04-12.1) 9.16 (6.31-12.5) 10.2 (7.13-13.8) 11.3 (7.92-15.1) 12.8 (9.02-16.9) 14.2 (10.0-18.6 1 Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS). Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upper bounds are not checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values. Please refer to NOAA Atlas 14 document for more information. Back to Top PF graphical PDS-based depth -duration -frequency (DDF) curves Latitude: 40.3428°r Longitude: -104.8716° Precipitation depth (in) 16 14 12 10 Dec E L Duration f C e n rri L .c tt rti 5 10 NOAA Atlas 14, Volume Bo Version 2 I tc poi rci ru t tiO 10 A 6 rel 25 50 100 200 Average recurrence interval (years) rn tu rn O O LA N It 1 IL O O 500 1000 Created {GMT} Tue Sep 13 22:17:04 2022 Back to Top Maps & aerials Small scale terrain f:ngel recurrence animal (years) 1 2 5 10 25 50 100 200 500 1000 �irailon 5-mkn 1 Li-4Mn 30 -min 50 -min 2 -hr 3 -hr 6r 12 -hr 24 -hr 2 -day — 3 -day — 4 -day i-day 1'0 -day 20 -day 30 -day 45 -day 50 -day Large scale terrain Large scale map Q Large scale aerial Back to Top US Department of Commerce National Oceanic and Atmospheric Administration National Weather Service National Water Center 1325 East West Highway Silver Spring, MD 20910 Questions?: HDSC.Questions@noaa.gov Disclaimer Attachment 4 USR Map •A A 1 • ., [0] O C a cC N ('a O (N N N O) 0) Ct C. PROPERTY DESCRIPTION C I PARCEL #1 The NE'/4 of Section 3, Township 4 North, Range 67 West of the 6th P.M., Weld County, Colorado, except the following described parcels: 1. A strip of land conveyed to the Union Pacific Railroad Company by Deed recorded September 25, 1908 in Book 287 at Page 74, being more particularly described as DEVELOPMENT STANDARDS follows: A strip, piece or parcel of land 200 feet in width, being 100 feet in width on each side of the center line of the main track of Union Pacific Railroad (known as the Denver 1. The property owner or operator shall be responsible for controlling noxious weeds on the site, pursuant to Chapter 15, Article I and II, of the to Fort Collins line) as the same has been surveyed, located and staked out through, upon, over and across the NE 1/4 of Section 3 Township 4 North, Range 67 West �Q Weld County Code. of the 6th P.M. nab 2. The access to the site shall be maintained to mitigate any impacts to the public road, including damages and/or off -site tracking. 3. Weld County will not replace overlapping easements located within existing right-of-way or pay to relocate existing utilities within the existing O, 2. That portion of land conveyed to The Department of Highways, State of Colorado by Deed recorded April 4, 1961 in Book 1581 at Page 409, described as follows: 1 County right-of-way. 4. Any work that may occupy and or encroach upon any County rights -of -way or easement shall acquire an approved Right -of -Way Use Permit A tract of parcel of land, No. 16 Project No. S 0057 (2) in the E1/2NE1/4 of Section 3, Township 4 North, Range 67 West of the 6th P.M., more particularly described as prior to commencement. follows: 5. Prior to the release of building permits, the applicant shall be required to submit a complete access application for a "preliminarily approved" access location as shown on this plat. Beginning at a point on the property line from which the NE corner of Section 3 bears N. 26° 13' E., a distance of 175.7 feet; 6. There shall be no parking or staging of vehicles on public roads. On -site parking shall be utilized. 1. Thence S. 68° 07' 30" E., along the property line, a distance of 86.7 feet to the E. line of Sec. 3; 7. The historical flow patterns and runoff amounts on the site will be maintained. 2. Thence S. 0° 51' 30" E., along the E. line of Sec. 3, a distance of 1,749.6 feet; Mad 8. All liquid and solid wastes (as defined in the Solid Wastes Disposal Sites and Facilities Act, 30-20-100.5, C.R.S.) shall be stored and ° Russian removed for final disposal in a manner thatprotects against surface and groundwater contamination. 3. Thence N. 42 57 30 W., along the existing northeasterly right of way line of the Dent -FT. Collins Branch of the Union Pacific Railroad, as located Dec., p g 1960, a distance of 74.6 feet, to the existing W. right of way line of the S.H. 257, as located December, 1960; Greif 9. No permanent disposal of wastes shall be permitted at this site. This is not meant to include those wastes specifically excluded from the 4. Thence N. 2° 08' W., along the existing W. right of way line of S.H. 257, as located December 1960, a distance of 134.6 feet; BIG THOMPSON "au sle I57 definition of a solid waste in the Solid Wastes Disposal Sites and Facilities Act, 30-20-100.5, C.R.S 5. Thence N. 0° 51' 30" W., along the existing W. right of way line of S.H. 257, a° s located December, 1960, a distance of 833.0 feet; RIVER 10. Waste materials shall be handled, stored, and disposed in a manner that controls fugitive dust, fugitive particulate emissions, blowing 6. Thence N. 03° 26' W., a distance of 600.6 feet; debris, and other potential nuisance conditions. The facility shall operate in accordance with Chapter 14, Article 1 of the Weld County Code. 7. Thence N. 0° 51' 30" W., a distance of 160.2 feet, more or less, to the point of beginning. SITE 11. Fugitive dust should attempt to be confined on the property. Uses on the property shall comply with the Colorado Air Quality Commission's air quality regulations and the accepted dust abatement plan. ALSO 12. The operation shall submit an Air Pollution Emission Notice (A.P.E.N.) and Emissions Permit Application and obtain permits from the Air Pollution Control Division, Colorado Department of Public Health and Environment, as applicable. A tract or parcel of land No. 17 of Colorado Department of Highways Project No. S 0057 (2) in the SE1/4NE1/4 of Section 3, being more particularly described as 13. The facility shall adhere to the maximum permissible noise levels allowed in the Industrial Zone as delineated in 25-12-103 C.R.S. The follows: I facility shall operate in accordance with the accepted noise evaluation report. 14. The operation shall remove, handle, and stockpile overburden, sand, soil, and gravel from the facility area in a manner that prevents Beginning at the point on the S. line of the NE 1/4 of the Section 3, Township 4 North, Range 67 West, from the SE corner of the NE '/4 of Sec. 3 bears S. 88° 21' 30" E., I 1 nuisance conditions. a distance of 90.1 feet; _ �� 15. Adequate drinking, hand washing, and toilet facilities shall be provided for employees and patrons of the facility, at all times. A permanent, 1. Thence N. 0° 51' 30" W., a distance of 30.0 feet to the existing N. right of way line of the County Road, as located December, 1960; a '>� adequate water supply shall be provided for drinking and sanitary purposes, as applicable. 2. Thence S. 88° 21' 30" E., along the existing N. right of way line of County Road, as located December, 1960, a distance of 50.0 feet; U _ 16. Any On -Site Wastewater Treatment System located on the property must comply with all provisions of the Weld County Code, pertaining to 3. Thence N. 0° 51' 30" W., along the existing W. right of way line of S.H. 257, as located December, 1960, a distance of 17.6 feet; �� E On -Site Wastewater Treatment Systems. 4. Thence N. 37° 42' W., along the property line, a distance of 29.5 feet; 17. Portable toilets and bottled water are acceptable to provide drinking and sanitary services to the site. Records of maintenance and proper 5. Thence N. 38° 46' 30" E., a distance of 12.0 feet; disposal for portable toilets shall be retained on a quarterly basis and available for review by the Weld County Department of Public Health 6. Thence N. 0° 51' 30" W., a distance of 568.5 feet to the existing southwesterly right of way line of the Dent -Ft. Collins Branch of the Union Pacific Railroad, as �; and Environment. Portable toilets shall be serviced by a cleaner licensed in Weld County, contain hand sanitizers and be screened from located December, 1960; existing adjacent residential properties and public rights -of -way. 7. Thence S. 42° 5T 30" E., along the existing southwesterly right of way line of the Dent -Ft. Colins Branch of the Union Pacific Railroad, as located December ', Statc i'9hwaY 63` — stea,hijwait a.' e � t �--� 18. Any vehicle or equipment washing areas shall capture all effluent and prevent discharges in accordance with the Rules and Regulations of 1960, a distance of 74.6 feet to the E. line of Sec. 3; 00 sta ` _ , __the Water Quality Control Commission, and the Environmental Protection Agency. 8. Thence S. 0° 51' 30" E., along with the E. line of Sec. 3, a distance 590.3 feet to the SE corner of the NE '/4 of the Sec. 3; M " )' 6)!Z`1 19. If applicable, the operation shall obtain a stormwater or other discharge permits from the Colorado Department of Public Health & 9. Thence N. 88° 21' 30" W., along with the S. line of the NE 1/4 of the Sec. 3, a distance of 90.1 feet, more or less, to the point of beginning. Environment, Water Quality Control Division. Milliken W'ad 20. All chemicals must be handled in a safe manner in accordance with product labeling. All chemicals must be stored secure, on an f` impervious surface, and in accordance with manufacturer's recommendations. 3. That portion of land conveyed to the Department of Highways by Deed recorded April 11, 1961 in Book 1582 at Page 183, described as follows: 0 2000 � Miliken 21. The operation shall comply with all applicable rules and regulations of the Colorado Division of Reclamation Mining and Safety. N MJ134%e 22. The operation shall comply with the Mine Safety and Health Act (MSHA). th SCALE IN FEET SChJoI A tract or parcel of land No. 17A of Colorado Dept.. of Highways' project No. S 0057 (2) in the SE1/4NE1/4 of Section 3, Township 4 North, Range 67 West, of the 6 23. The facility shall notify the County of any revocation and/or suspension of any State issued permit. P.M., being more particularly described as follows: 24. The operation shall comply with all applicable rules and regulations of State and Federal agencies and the Weld County Code. 25. A Flood Hazard Development Permit is required for all construction or development occurring in the floodplain or floodway as delineated on Beginning at a point on the existing N. right of way line of County Road, as located December, 1960, from which the SE corner of the NE'/4 of Sec. 3 bears S. 70° 12' Federal Emergency Management Agency (FEMA) FIRM Community Panel Maps #08123C -1682F and 1701 F issue date September 17, 30" E., a distance of 96.2 feet; LOCATION MAP 2020 and Panel Maps #08123C -1684F and 1703F issue date March 23, 2022 (Big Thompson River Floodplain). Any development shall 1. Thence, N. 38° 46' 30" E., a distance of 50.7 feet to the northeasterly property line; comply with all applicable Weld County requirements, Colorado Water Conservation Board requirements as described in Rules and 2. Thence, S. 37° 42' E., along the northesterly property line, a distance of 29.5 feet to the existing W. right of way line of S.H. 257, as located December, 1960; Regulations for Regulatory Floodplains in Colorado, and FEMA regulations and requirements as described in 44 CFR parts 59, 60, and 65. 3. Thence, S. 0° 51' 30" E., along the existing W. right of way line of S.H. 257, as located December, 1960, a distance of 17.6 feet; The FEMA definition of development is any man-made change to improved or unimproved real estate, including but not limited to buildings 4. Thence, N. 88° 21' 30" W., along the existing N. right of way line of the County Road, as located December, 1960, a distance of 50.0 feet, more or less to the or other structures, mining, dredging, filling, grading, paving, excavation, drilling operations, or storage of equipment and materials.. point of beginning. PROPERTY OWNER'S CERTIFICATION 26. FEMA's floodplain boundaries may be updated at any time by FEMA. Prior to the start of any development activities, the owner should contact Weld County to determine if the floodplain boundaries have been modified. 4. The portion of the NE 1/4 conveyed to Blehm Land and Cattle Co., a Wyoming Corporation by Deed recorded April 5, 1979 in Book 865 as Reception No. 1786578, The undersigned property owner(s) do(es) hereby agree to the Site Specific Development Plan and Use by : 27. If at all possible, place the berms parallel to the flow of floodwaters. being described as follows: Review Development Standards as described hereon this day of 20 28. All transient equipment including temporary structures and portable toilets shall be anchored. 29. Any fencing on the property must allow the flow of floodwaters either through or under the fence. All that part of the NE 1% of Section 3, Township 4 North, Range 67 West of the 6th P.M., Weld County, Colorado, lying Northerly and Easterly of the Right -of -Way of 30. The installation of any septic system within the 100 -year floodplain shall comply with the Weld County O.W.T.S. floodplain policy. the Union Pacific Railroad Company, EXCEPT those parcels conveyed to Weld County by deed recorded in Book 114 at Page 491 and to the Department of Highways by deed recorded in Book 1581 at Page 409. Name of Property Owner Name of Property Owner 5. Lot "A" of Recorded Exemption No. 1059 -03 -1 -RE 889, according to map recorded October 1, 1986 in Book 1130 as Reception No. 2071677, being a portion of the NE 1/4 of Section 3, Township 4 North, Range 67 West of the 6th P.M., Weld County, Colorado, and Lot "B" of Amended Recorded Exemption No. 1059 -03 -1 -RE 889, according to Deed recorded June 21, 2001 as Reception No. 2859250, being a portion of the NE 1/4 of Section 3, Township 4 North, Range 67 West of the 6th P.M., Weld County, Colorado. Lot B is described as follows: Considering the Southerly line of the Northeast Quarter of said Section 3, as bearing N 88°21'30"W and with all bearings contained herein relative thereto: From the Center Quarter comer of said Section 3; THENCE S 88°21'30"E along the Southerly line of said Northeast Quarter, 283.00 feet to the Southeasterly comer of Lot A of Recorded Exemption No. 1059-03-1-RE889, recorded in Book 1130 as Reception No. 2071677 of the Weld County Records and the POINT OF BEGINNING; THENCE N 00°51'30"W along the Easterly line of said Lot A, 205.01 feet to the Northeasterly comer of said Lot A; THENCE N 88°21'30"W along the Northerly line of said Lot A, 136.00 feet to an angle point in said Lot A; THENCE N 00°51'30"W along the Easterly line of said Lot A, 90.00 feet to the Northeasterly line of said Lot A; THENCE N 88°21'30"W along the Northerly line of said Lot A, 148.04 feet to a point on the Westerly line of the Northeast Quarter of said Section 3; THENCE N 01°03'33"W along said Westerly line, 313.36 feet; THENCE leaving said Westerly line S 88°21'30"E, 749.14 feet; THENCE S 05°04'30"W, 608.84 feet to a point on the Southerly line of the Northeast Quarter of said Section 3: THENCE N 88°21'30"W along said Southerly line, 401.01 feet to the POINT OF BEGINNING. Said tract of land containing 8.360 Acres, more or less. PARCEL #2 PLANNING COMMISSION CERTIFICATION This is the certify that the Weld County Planning Commission has certified and does hereby recommend Board of County Commissioners, Weld County, Colorado, for its confirmation, approval and adoption th Specific Development Plan and Use by Special Review as shown and described hereon this _____________,20____ Chair, Weld County Planning Commission BOARD OF COUNTY COMMISSIONERS CERTIFICATION A strip of land 100 feet in width, being 50 feet wide on each side of a centerline through the NE 1% of Section 3, Township 4 North, Range 67 West of the 6th P.M., Weld This is to certify that the Board of County Commissioners, Weld County, Colorado, does hereby confirm anc County, Colorado, said center line being more fully described as follows: this Site Specific Development Plan and Use by Special Review and the Development Standards as shov Beginning at a point on the North line of the County Road on the south of said NE 1/4 51 feet more or less, west of the West line of the County Road on the east of said NE 1/4 ; thence North 37° 42' West 3238 feet; thence Northwesterly on a 1° 30' curve to the left 347 feet to a point on the North line of said NE ¼, 463 feet east of the northwest corner thereof, a total distance of 3585 feet. PARCEL #3 That portion of the SE 1/4 of Section 34, Township 5 North, Range 67 West of the 6th P.M., Weld County, Colorado, lying and being South and West of the Right -of -Way of the Union Pacific Railroad Company, excepting therefrom a parcel of land deeded to The Denver, Laramie and Northwestern Railway Company, a corporation by Deed recorded May 12, 1909 in Book 300 at Page 580, being described as follows: All that part of parcel of land situated in the SE '/4 of Section 34, lying southwesterly of the southwesterly boundary line of the Union Pacific Railroad Company's right of way and Northeasterly of a line drawn 50 feet southwesterly of and parallel to the center line of the Denver, Laramie and Northwestern Railway as now located, surveyed and staked out over and across said SE'/4 said center line being more fully described as follows: Beginning at a point on the South line of said SE ¼, 907 feet east of the Southwest corner thereof; thence in a Northwesterly direction on a 1° 30" curve to the left 986.3 feet; thence North 57° 42" West 1662 feet to a point on the west line of said SE '/4, 708 feet North of the Southwest corner thereof, a total distance of 1152.5 feet, GROSS LAND AREA: 114.253 ACRES, MORE OR LESS described hereon this day of Chair, Board of County Commissioners ATTEST: Weld County Clerk to the Board BY: Deputy Clerk to the Board 20 Dated: NOTES 1. DRMS Permit Number M2021-059 2. Utilize Colorado 811 prior to any excavation activities SHEET LIST TABLE SHEET NUMBER SHEET TITLE 1 COVER SHEET 2 VICINITY MAP 3 EXTRACTION PLAN MAP REVISIONS # DESCRIPTION oA4 e P 0 DRAFT FOR COMMENT 12/8/2021 JM/TT TT ANUSR SUBMITTAL 5/20/202 TT TT ADDRESSED PLANNING COMMENTS /16/2022 TT TT DATE 9/16/2022 PROJECT 360100 TASK NUMBER 006-01 DRAWN BY TT PROJECT ENGINEER TT CHECKED BY WN DUNN PIT USR MAP COVER SHEET SHEET NUMBER: REVISION NUMBER: 1 A PREPARED BY: LE STO TELESTO SOLUTIO N S o IN C O RPO RATED PREPARED FOR: ,! 1 LOVELAND READY -MIX CONCRETE LEGEND/NOTES PROPERTY LINE/ SPECIAL REVIEW PERMIT AREA EXISTING EASEMENT EXISTING RIGHT-OF-WAY ___ PROPERTY LINE OFFSET 1/2 MILE PARCELS - ROAD CENTERLINES SECTION LINES RIVER DITCHES RESIDENTIAL LOTS OIL & GAS WELL NRCS SOIL CLASSIFICATION AQUOLLS AND AQUENTS, GRAVELLY THEDALUND LOAM WATER 0 600 SCALE IN FEET COORDINATE SYSTEM NAD83 COLORADO STATE PLANE, NORTH, US SURVEY FEET REVISIONS # DESCRIPTION oP�� ` P Qo2 0 DRAFT FOR COMMENT 12/8/2021 JM/TT TT ANUSR SUBMITTAL 0/20/2021 TT TT 2 ADDRESSED PLANNING COMMENTS 9/26/202 TT TT DATE 9/26/2022 PROJECT 360100 TASK NUMBER 006-01 DRAWN BY TT PROJECT ENGINEER TT CHECKED BY WE DUNN PIT USR MAP VICINITY MAP SHEET NUMBER: REVISION NUMBER: 2 PREPARED BY: T E LE ST® ROLOTIO N S s ID C 0 EDO RATED PREPARED FOR: s- LOVEtAND REAADY-MAIX CONCRETE LEGEND/NOTES 4700- EXISTING 5' CONTOURS 4700 - PROPOSED 5' CONTOURS - - PROPERTY LINE/ SPECIAL REVIEW PERMIT AREA EXISTING EASEMENT EXISTING GAS LINE EXISTING OVERHEAD WIRE EXISTING WATER LINE EXISTING TELEPHONE EXISTING FENCE LINE EXISTING COMM. LINE UTILITY POLE WATER METER WATER VALVE PROPERTY LINE OFFSET 500' ACTIVE MINE CELL BOUNDARY PRODUCTION YEARS AT END OF INCREMENT ROAD CENTERLINE RIVER DITCHES PROPOSED 100 YEAR FLOODPLAIN BOUNDARY PIT BOUNDARY RECLAIMED PONDS PROPOSED TREES & SHRUBS PROPOSED WETLAND GRASSES MONITORING WELL SURFACE FLOW DIRECTON RIPRAP COORDINATE SYSTEM: NAD83 COLORADO STATE PLANE, NORTH, US SURVEY FEET 5'D 0 • Icl�y 55133 REVISIONS # DESCRIPTION oP4. my QQe°° 0 DRAFT FOR COMMENT 2/8/2021 JM/TT TT AUSR SUBMITTAL /20/2022 TT TT 2 ADDRESSED PLANNING COMMENTS /2s/20z TT TT DATE 9/26/2022 PROJECT 360100 TASK NUMBER 006-01 DRAWN BY TT PROJECT ENGINEER TT CHECKED BY WN DUNN PIT USR MAP EXTRACTION PLAN MAP SHEET NUMBER: REVISION NUMBER: 3 z PREPARED BY: T E LE ST SOLUTIO N S o IN C 0 RPO RATED PREPARED FOR: L0 ELA4D REM Y MIX CONCRETE Weld County Department of Public Health and Environment Memorandum To: Kim Ogle From: Lauren Light, Environmental Health Services Date: July 28, 2022 Re: USR22-0018 Applicant: Loveland Ready -Mix Concrete Inc Environmental Health Services has reviewed this Site -Specific Development Plan and Use by Special Review Permit for Open Mining (sand, gravel, and stone) and processing of minerals, employee and equipment associated with operations parking, outside of subdivisions and historic townsites, in the A (Agricultural) Zone. As mining is considered a temporary use, portable toilets and bottled water are acceptable for sanitary uses in accordance with EH policy. According to the application there will be no fuel storage, washing of vehicles or equipment on site. No processing will occur on the property but will be completed at the Johnstown Ready -Mix facility located at CR 54 and CR 13. A dust abatement plan was submitted and adherence to that plan is required. Alluvial groundwater is the planned water supply. The dust abatement plan indicates water will be applied to the haul roads, stockpiles will be compacted, topsoil piles will be revegated and mining will be phased which will limit the overall mine surface to five acre increments. An Air emission permits (APEN) from the State is required and will address dust control for mining operations, haul roads, and any sand and gravel processing equipment. The application indicates an APEN has been submitted to the State. Noise is restricted to the level allowed in the industrial zone district and noise levels are measured 25 feet from the property line. The application contains a noise evaluation, conducted by Telesto Solutions Inc., which indicates the industrial level can be met 25 feet from property boundary. The evaluation states: "The sound levels generated from the topsoil removal activities prior to the mining operations are predicted to be below industrial noise limits at the residential property lines and, additionally, will meet residential and commercial noise standards of 55 dBA. The sound levels generated from mining and hauling operations at the adjacent residential and commercial lots, are predicted to be below residential noise limits, without mitigation. Adherence to the noise modeling report is required. 1555 N. 17th Avenue Greeley, CO 80631 Phone: (970) 304-6410 weldhealth.org Public Health Weld County Department of Public Health and Environment We recommend that the following requirements be incorporated into the permit as development standards: 1. All liquid and solid wastes (as defined in the Solid Wastes Disposal Sites and Facilities Act, 30-20-100.5, C.R.S.) shall be stored and removed for final disposal in a manner that protects against surface and groundwater contamination. 2. No permanent disposal of wastes shall be permitted at this site. This is not meant to include those wastes specifically excluded from the definition of a solid waste in the Solid Wastes Disposal Sites and Facilities Act, 30-20-100.5, C.R.S 3. Waste materials shall be handled, stored, and disposed in a manner that controls fugitive dust, fugitive particulate emissions, blowing debris, and other potential nuisance conditions. The facility shall operate in accordance with Chapter 14, Article 1 of the Weld County Code. 4. Fugitive dust should attempt to be confined on the property. Uses on the property shall comply with the Colorado Air Quality Commission's air quality regulations and the accepted dust abatement plan. 5. The operation shall submit an Air Pollution Emission Notice (A.P.E.N.) and Emissions Permit Application and obtain permits from the Air Pollution Control Division, Colorado Department of Public Health and Environment, as applicable. 6. The facility shall adhere to the maximum permissible noise levels allowed in the Industrial Zone as delineated in 25-12-103 C.R.S. The facility shall operate in accordance with the accepted noise evaluation report. 7. The operation shall remove, handle, and stockpile overburden, sand, soil, and gravel from the facility area in a manner that prevents nuisance conditions. 8. Adequate drinking, hand washing, and toilet facilities shall be provided for employees and patrons of the facility, at all times. A permanent, adequate water supply shall be provided for drinking and sanitary purposes, as applicable. 9. Any On -Site Wastewater Treatment System located on the property must comply with all provisions of the Weld County Code, pertaining to On -Site Wastewater Treatment Systems. 1555 N. 17th Avenue Greeley, CO 80631 Phone: (970) 304-6410 weldhealth.org Public Health Weld County Department of Public Health and Environment 10. Portable toilets and bottled water are acceptable to provide drinking and sanitary services to the site. Records of maintenance and proper disposal for portable toilets shall be retained on a quarterly basis and available for review by the Weld County Department of Public Health and Environment. Portable toilets shall be serviced by a cleaner licensed in Weld County, contain hand sanitizers and be screened from existing adjacent residential properties and public rights - of -way. 11.Any vehicle or equipment washing areas shall capture all effluent and prevent discharges in accordance with the Rules and Regulations of the Water Quality Control Commission, and the Environmental Protection Agency. 12. If applicable, the operation shall obtain a stormwater or other discharge permits from the Colorado Department of Public Health & Environment, Water Quality Control Division. 13.All chemicals must be handled in a safe manner in accordance with product labeling. All chemicals must be stored secure, on an impervious surface, and in accordance with manufacturer's recommendations. 14. The operation shall comply with all applicable rules and regulations of the Colorado Division of Reclamation Mining and Safety. 15.The operation shall comply with the Mine Safety and Health Act (MSHA). 16. The facility shall notify the County of any revocation and/or suspension of any State issued permit. 17. The operation shall comply with all applicable rules and regulations of State and Federal agencies and the Weld County Code. 1555 N. 17th Avenue Greeley, CO 80631 Phone: (970) 304-6410 weldhealth.org Public Health TELESTO 5 O L U T l O N 5• I N C O K P O K A 1' E L7 September 27, 2022 Via Electronic Mail Kim Ogle Weld County Planning Department 1555 North 17th Avenue Greeley, Colorado 80631 Subject: Loveland Ready -Mix USR22-0018 Weld County Environmental Health Services Referral Response Dear Mr. Ogle: Loveland Ready -Mix Concrete, Inc. (LRM) received the letter dated July 28, 2022 from the Weld County Department of Public Health and Environment, Environmental Health (EH) Services. EH recommended development standards to be incorporated into the permit. This letter serves as LRM's response to EH's letter. The recommended development standards are listed below in italics, followed by LRM's response. 1. All liquid and solid wastes (as defined in the Solid Wastes Disposal Sites and Facilities Act, 30-20-100.5, C.R.S.) shall be stored and removed for final disposal in a manner that protects against surface and groundwater contamination. LRM Response No liquid or solid waste storage is planned at this site. This note will be incorporated into the development standards on the USR Plan map. 2. No permanent disposal of wastes shall be permitted at this site. This is not meant to include those wastes specifically excluded from the definition of a solid waste in the Solid Wastes Disposal Sites and Facilities Act, 30-20-100.5, C.R.S LRM Response There will be no permanent disposal of wastes at this site. This note will be incorporated into the development standards on the USR Plan map. 3. Waste materials shall be handled, stored, and disposed in a manner that controls fugitive dust, fugitive particulate emissions, blowing debris, and other potential nuisance conditions. The facility shall operate in accordance with Chapter 14, Article 1 of the Weld County Code. Colorado Office (Corporate) New Mexico Office 750 14th Street SW Loveland, Colorado 80537 970-484-7704 / 970-484-7789 (FAX) 1303 Pope Street Silver City, New Mexico 88061 575-538-5620/575-538-5625 (FAX) To: Kim Ogle Date: September 27, 2022 Page 2 LRM Response LRM will follow the Dust Abatement Plan for this site. Additionally, LRM plans to use all material mined at the site in aggregate production or mine reclamation. This note will be incorporated into the development standards on the USR Plan map. 4. Fugitive dust should attempt to be confined on the property. Uses on the property shall comply with the Colorado Air Quality Commission's air quality regulations and the accepted dust abatement plan. LRM Response LRM will follow the previously submitted Dust Abatement Plan. This note will be incorporated into the development standards on the USR Plan map. 5. The operation shall submit an Air Pollution Emission Notice (A.P.E.N.) and Emissions Permit Application and obtain permits from the Air Pollution Control Division, Colorado Department of Public Health and Environment, as applicable. LRM Response LRM submitted an APEN application in October of 2021. Construction permit 22WE0047F was issued May 17, 2022. This note will be incorporated into the development standards on the USR Plan map. 6. The facility shall adhere to the maximum permissible noise levels allowed in the Industrial Zone as delineated in 25-12-103 C.R.S. The facility shall operate in accordance with the accepted noise evaluation report. LRM Response LRM will operate in accordance with the previously submitted Noise Evaluation report. This note will be incorporated into the development standards on the USR Plan map. 7. The operation shall remove, handle, and stockpile overburden, sand, soil, and gravel from the facility area in a manner that prevents nuisance conditions. LRM Response In addition to EH's requirement, LRM's DRMS permit requires the same level of care. It is LRM's intent to be a good neighbor and avoid the creation of nuisance conditions. This note will be incorporated into the development standards on the USR Plan map. 8. Adequate drinking, hand washing, and toilet facilities shall be provided for employees and patrons of the facility, at all times. A permanent, adequate water supply shall be provided for drinking and sanitary purposes, as applicable. 20220927 Health&EnvironmentDept TELESTO To: Kim Ogle Date: September 27, 2022 Page 3 LRM Response This note will be incorporated into the development standards on the USR Plan map. LRM takes care of its employees by providing said requirements. 9. Any On -Site Wastewater Treatment System located on the property must comply with all provisions of the Weld County Code, pertaining to On -Site Wastewater Treatment Systems. LRM Response This note will be incorporated into the development standards on the USR Plan map. LRM plans no on -site wastewater treatment systems. 10. Portable toilets and bottled water are acceptable to provide drinking and sanitary services to the site. Records of maintenance and proper disposal for portable toilets shall be retained on a quarterly basis and available for review by the Weld County Department of Public Health and Environment. Portable toilets shall be serviced by a cleaner licensed in Weld County, contain hand sanitizers and be screened from existing adjacent residential properties and public rights -of -way. LRM Response EH's comment is noted. LRM plans to contract this service with a provider licensed in Weld County. This note will be incorporated into the development standards on the USR Plan map. 11. Any vehicle or equipment washing areas shall capture all effluent and prevent discharges in accordance with the Rules and Regulations of the Water Quality Control Commission, and the Environmental Protection Agency. LRM Response There will be no vehicle washing areas on site. This note will be incorporated into the development standards on the USR Plan map. 12. If applicable, the operation shall obtain a stormwater or other discharge permits from the Colorado Department of Public Health & Environment, Water Quality Control Division. LRM Response LRM will obtain the appropriate permits. The activities for the site fall under CDPS General Permit COR400000 (Construction Stormwater Discharge) and CDPS General Permit COG500000 (Discharges from Sand and Gravel Mining and Processing). 20220927 Health&EnvironmentDept TELESTO To: Kim Ogle Date: September 27, 2022 Page 4 This note will be incorporated into the development standards on the USR Plan map. 13. All chemicals must be handled in a safe manner in accordance with product labeling. All chemicals must be stored secure, on an impervious surface, and in accordance with manufacturer's recommendations. LRM Response This note will be incorporated into the development standards on the USR Plan map. LRM's standard operating procedure is to follow all product handling requirements. They comply with and are regulated by the Mine Safety and Health Administration (MSHA) in this regard. 14. The operation shall comply with all applicable rules and regulations of the Colorado Division of Reclamation Mining and Safety. LRM Response This note will be incorporated into the development standards on the USR Plan map. LRM received the required permits from the DRMS (Permit Number M2021-059) and thus meets this requirement. 15. The operation shall comply with the Mine Safety and Health Act (MSHA). LRM Response This note will be incorporated into the development standards on the USR Plan map. 16. The facility shall notify the County of any revocation and/or suspension of any State issued permit. LRM Response This note will be incorporated into the development standards on the USR Plan map. LRM will advise the County of any permit status change. 17. The operation shall comply with all applicable rules and regulations of State and Federal agencies and the Weld County Code. LRM Response This note will be incorporated into the development standards on the USR Plan map. LRM plans to comply with all applicable codes. 20220927 Health&EnvironmentDept TELESTO To: Kim Ogle Date: September 27, 2022 Page 5 Sincerely, Telesto Solutions, Inc. Taryn Tigges, PE Senior Engineer TMT:wln cc: Stephanie Fancher-English, Loveland Ready -Mix Concrete, Inc. 20220927 Health&EnvironmentDept TELESTO PROJECT: MEMORANDUM TO: Kim Ogle DATE: July 13, 2022 FROM: Diana Aungst SUBJECT: USR22-0018, Loveland Ready Mix A Site Specific Development Plan and Use by Special Review Permit for Open Mining (sand, gravel and stone) and processing of minerals, employee and equipment associated with operations parking, outside of subdivisions and historic townsites, in the A (Agricultural) Zone District — Dunn Pit PARCELs: 105903000027, 095734000030, and 105903000045 COMMENTS: FHDP21-0024 was issued for overburden and aggregate removal, access road, temporary stockpiles and a new bridge. The results of the HEC RAS model show that there will be a decrease in the base flood elevation (BFE) up to -1.32 feet. Due to this decrease in the BFE a Letter of Map Revision (LOMR) will be required. The LOMR shall be submitted to the Department of Planning Services within six (6) month of reclamation. DELINEATE ON THE PLAT: 1. Show the floodplain and floodway (if applicable) boundaries on the map. Label the floodplain boundaries with the FEMA Flood Zone and FEMA Map Panel Number or appropriate study. (Department of Planning Services - Floodplain) DEVELOPMENT STANDARDS: 1. A Flood Hazard Development Permit is required for all construction or development occurring in the floodplain or floodway as delineated on Federal Emergency Management Agency (FEMA) FIRM Community Panel Maps #08123C -1682F and 1701F issue date September 17, 2020 and Panel Maps #08123C -1684F and 1703F issue date March 23, 2022 (Big Thompson River Floodplain). Any development shall comply with all applicable Weld County requirements, Colorado Water Conservation Board requirements as described in Rules and Regulations for Regulatory Floodplains in Colorado, and FEMA regulations and requirements as described in 44 CFR parts 59, 60, and 65. The FEMA definition of development is any man-made change to improved or unimproved real estate, including but not limited to buildings or other structures, mining, dredging, filling, grading, paving, excavation, drilling operations, or storage of equipment and materials. (Department of Planning Services - Floodplain) 2. FEMA's floodplain boundaries may be updated at any time by FEMA. Prior to the start of any development activities, the owner should contact Weld County to determine if the floodplain boundaries have been modified. (Department of Planning Services - Floodplain) 3. If at all possible, place the berms parallel to the flow of floodwaters. (Department of Planning Services — Floodplain) 4. All transient equipment including temporary structures and portable toilets shall be anchored. (Department of Planning Services — Floodplain) 5. The installation of any septic system within the 100 -year floodplain shall comply with the Weld County O.W.T.S. floodplain policy. (Department of Planning Services - Floodplain) TELESTO 5 O L U T l O N 5• I N C O K P O K A 1' E L7 September 27, 2022 Via Electronic Mail Kim Ogle Weld County Planning Department 1555 North 17th Avenue Greeley, Colorado 80631 Subject: Loveland Ready -Mix USR22-0018 Weld County Floodplain Administrator Referral Response Dear Mr. Ogle: Loveland Ready -Mix Concrete, Inc. (LRM) received the letter dated July 13, 2022 from Diana Aungst of Weld County Planning Services, Floodplain Administrator. This letter serves as LRM's response to the Department of Planning Services' comments and recommendations. Comments Comment FHDP21-0024 was issued for overburden and aggregate removal, access road, temporary stockpiles and a new bridge. The results of the HEC RAS model show that there will be a decrease in the base flood elevation (BFE) up to -1.32 feet. Due to this decrease in the BFE a Letter of Map Revision (LOMR) will be required. The LOMR shall be submitted to the Department of Planning Services within six (6) month of reclamation. LRM Response The Department of Planning Services comment is noted. Delineate on the Plat Comment Show the floodplain and floodway (if applicable) boundaries on the map. Label the floodplain boundaries with the FEMA Flood Zone and FEMA Map Panel Number or appropriate study. LRM Response The USR Plan map will be updated to label applicable floodplain boundaries. Colorado Office (Corporate) New Mexico Office 750 14th Street SW Loveland, Colorado 80537 970-484-7704 / 970-484-7789 (FAX) 1303 Pope Street Silver City, New Mexico 88061 575-538-5620/575-538-5625 (FAX) To: Kim Ogle Date: September 27, 2022 Page 2 Development Standards Comment A Flood Hazard Development Permit is required for all construction or development occurring in the floodplain or floodway as delineated on Federal Emergency Management Agency (FEMA) FIRM Community Panel Maps #08123C -1682F and 1701F issue date September 17, 2022 and Panel Maps #08123C -1684F and 1703F issue date March 23, 2022 (Big Thompson River Floodplain). Any development shall comply with all applicable Weld County requirements, Colorado Water Conservation Board requirements as described in Rules and Regulations for Regulatory Floodplains in Colorado, and FEMA regulations and requirements as described in 44 CFR parts 59, 60, and 65. The FEMA definition of development is any man-made change to improved or unimproved real estate, including but not limited to buildings or other structures, mining, dredging, filling, grading, paving, excavation, drilling operations, or storage of equipment and materials. LRM Response The County has issued FHDP21-0024 to LRM for the project (dated November 30, 2021). Comment FEMA 'sfloodplain boundaries may be updated at any time by FEMA. Prior to the start of any development activities, the owner should contact Weld County to determine if the floodplain boundaries have been modified. LRM Response LRM will contact Weld County prior to the start of mining to determine if the FEMA floodplain maps were updated in the interim. Comment If at all possible, place the berms parallel to the flow of floodwaters. LRM Response LRM plans for no berms in this project except where required for safety reasons. LRM will make a good faith effort if berms are used to place them such that flood flows pass through or around them. Comment All transient equipment including temporary structures and portable toilets shall be anchored. 20220927FloodplainAdministrator TELESTO To: Kim Ogle Date: September 27, 2022 Page 3 LRM Response LRM will anchor any temporary structures and portable toilets. Comment Any fencing on the property must allow the flow of floodwaters either through or under the fence. LRM Response The Site is currently fenced with barbed wire, which allows for passing of flood waters. No additional fencing is proposed with the Project. Comment The installation of any septic system within the 100 year floodplain shall comply with the Weld County O. W.T.S. floodplain policy. LRM Response LRM is not proposing to install a septic system at this site. Sincerely, Telesto Solutions, Inc. -2 Taryn Tigges, PE Senior Engineer TMT:wln cc: Stephanie Fancher-English, Loveland Ready -Mix Concrete, Inc. 20220927FloodplainAdministrator TELESTO Submit by Email Weld County Referral July 12, 2022 The Weld County Department of Planning Services has received the following item for review: Applicant: Loveland Ready -Mix Concrete Inc Case Number: USR22-0018 Please Reply By: August 9, 2022 Planner: Kim Ogle Project: A Site Specific Development Plan and Use by Special Review Permit for Open Mining (sand, gravel and stone) and processing of minerals, employee and equipment associated with operations parking, outside of subdivisions and historic townsites, in the A (Agricultural) Zone District Parcel Number: 105903000027-R4480786 Legal: Part of the NE4 Section 3, T4N, R67W of the 6th P.M., Weld County, Colorado. Parcel Number: 105903000045-R0932101 Legal: Part of the NE4 Section 3, T4N, R67W of the 6th P.M., Weld County, Colorado. Parcel Number: 095734000030-R1639586 Legal: Part of the SE4 Section 34, T5N, R67W of the 6th P.M., Weld County, Colorado. Location: North of and adjacent to County Road 48.5, west of and adjcaent to Highway 257 The application is submitted to you for review and recommendation. Any comments or recommendation you consider relevant to this request would be appreciated. Please reply by the above listed date so that we may give full consideration to your recommendation. Any response not received before or on this date may be deemed to be a positive response to the Department of Planning Services. If you have any further questions regarding the application, please call the Planner associated with the request. Please note that new information may be added to applications under review during the review process. If you desire to examine or obtain this additional information, please call the Department of Planning Services. We have reviewed the request and find that it does / does not comply with our Comprehensive Plan because: We have reviewed the request and find no conflicts with our interests. See attached letter. Signature Agency Oil & Gas Energy Department Date July 26, 2022 Weld County Planning Dept. 1555 N. 17th Ave, Greeley, CO 80631 (970)-440-6100 (970)-304-6498 fax Weld County Oil & Gas Energy Department Referral Comments Referring Agency: Weld County Department of Planning Services Reference Number: USR22-0018 Associated Parcel(s): 105903000045, 105903000027, 095734000030 OGED Reviewer: Kelly Holliday Review Date: July 26, 2022 The Staff of the Weld County Oil and Gas Energy Department (OGED) appreciates the opportunity to comment on the captioned planning case. Staff has completed review of the proposal and have no conflicts with the proposed activity. We have included additional comments below: 1. There are no active or proposed 1041 WOGLA Permits on the associated parcel. There are several oil and gas well sites in the area surrounding the parcel. 2. The parcel includes three (3) active oil and gas wells, listed in Table 1 below. OGED requests that the Applicant coordinate operations in proximity to existing wells and production facilities with the operator(s) of these wells. API Operator Well Title Well Status 05-123-22269 KERR MCGEE OIL & GAS ONSHORE LP 8-3 LOVELAND PR 05-123-23123 KERR MCGEE OIL & GAS ONSHORE LP 1-3 LOT HOLDINGS PR 05-123-23191 KERR MCGEE OIL & GAS ONSHORE LP 2-3 LOVELAND PR 3. The parcel includes one (1) plugged and abandoned (PA) well listed in Table 2 below. Additional information regarding these plugged and abandoned wells is available from the Colorado Oil and Gas Conservation Commission (COGCC). OGED recommends that the Applicant review this information and contact the responsible operator regarding well infrastructure that may have been abandoned in place prior to conducting operations in proximity to the wells. API Operator Well Title Well Status 05-123-11941 KERR MCGEE OIL & GAS ONSHORE LP 1 DUNN PA 4. Based on COGCC data there are existing off -location flowlines on the associated parcel. There are also historic access roads to the active oil and gas facilities. OGED recommends that the Applicant contact Justin Nelson, with Kerr-McGee's field operations team at justinnelson@oxy.com or (970) 576-6075 to coordinate activity on the associated parcel. 5. The USR lands may include additional oil and gas related infrastructure, such as off -location flowlines or pipeline which are a use by right and not regulated by Weld County. OGED requests that the applicant reviews flowline data available from the COGCC map viewer and utilize Colorado 811 prior to any excavation activities. These comments and recommendations are based upon the review of the application materials submitted by the applicant and other relevant information available on the E -Permit site. TELESTO SOLUTIONS• INCORPORATED September 27, 2022 Via Electronic Mail Kim Ogle Weld County Planning Department 1555 North 17t" Avenue Greeley, Colorado 80631 Subject: Loveland Ready -Mix USR Permit Submittal Case No. USR22-0018 Dear Mr. Ogle: Loveland Ready -Mix Concrete, Inc. (LRM) received the letter dated July 26, 2022, from the Weld County Oil and Gas Energy Department (OGED). This letter serves as LRM's response to OGED's comments and recommendations. OGED's are written in italics followed by LRM's response. Comment There are no active or proposed 1041 WOGLA Permits on the associated parcel.. There are several oil and gas well sites in the area surrounding the parcel.. LRM Response OGED' s comment is noted. Comment The parcel includes three (3) active oil and gas wells, listed in Table 1 below. OGED requests that the Applicant coordinate operations in proximity to existing wells and production facilities with the operator(s) of these wells. API Operator Well Title Well Status 05-123-22269 KERR MCGEE OIL & GAS ONSHORE LP 8-3 LOVELAND PR 05-123-23123 KERR MCGEE OIL & GAS ONSHORE LP 1-3 LOT HOLDINGS PR X15-123-23191 KERR MCGEE OIL & GAS ONSHORE LP 2-3 LOVELAND PR LRM Response LRM will coordinate operations with Kerr McGee. Colorado Office (Corporate) New Mexico Office 750 14th Street SW Loveland, Colorado 80537 970-484-7704 / 970-484-7789 (FAX) 1303 Pope Street Silver City, New Mexico 88061 575-538-5620 / 575-538-5625 (FAX) To: Kim Ogle Date: September 27, 2022 Page 2 Comment The parcel includes one (1) plugged and abandoned (PA) well listed in Table 2 below. Additional information regarding these plugged and abandoned wells is available from the Colorado Oil and Gas Conservation Commission (COGCC). OGED recommends that the Applicant review this information and contact the responsible operator regarding well infrastructure that may have been abandoned in place prior to conducting operations in proximity to the wells. API Operator Well Title Well Status 05-123-11941 KERR MCGEE OIL & GAS ONSHORE LP 1 DUNN PA LRM Response LRM will coordinate operations with Kerr McGee. Comment Based on COGCC data there are existing off -location flowlines on the associated parcel. There are also historic access roads to the active oil and gas facilities. OGED recommends that the Applicant contact Justin Nelson, with Kerr McGee 's field operations team at justinnelsonoxy.com or (970) 576-6075 to coordinate activity on the associated parcel. LRM Response LRM will coordinate operations with Kerr McGee. Comment The USR lands may include additional oil and gas related infrastructure, such as off - location flowlines or pipeline which are a use by right and not regulated by Weld County. OGED requests that the applicant reviews flowline data available from the COGCC map viewer and utilize Colorado 811 prior to any excavation activities. LRM Response LRM has called out the 50' oil and gas line easement on the extraction map. This appears to align with the active flowline shown the COGCC map viewer as of 8/1/2022, as shown on the screenshot in Figure 1. LRM will utilize Colorado 811 prior to excavation activities. 20220927 OGED TELEST® $01.11110100 I i i C O X• O. n It RI C3 To: Kim Ogle Date: September 27, 2022 Page 3 Layers I-' �❑Ir� Wells Lt. Well (API Spot) Well Operator Well Name ❑ Well API# ❑ Well Status Label ❑E O Well Status Abandoned Location (AL) Active (AC) Domestic (Dlvi) Drilling (DG) thy & Abanldoned (DA) Injecting (Li) Plugged & Abandoned (PA) Producing (PR) Shut -In (SI) Temporarily Abandoned (TA) Waiting On Completion 1'/VO) Active Permit (AP) 0O Expired Permit (EP) 0 ❑Eg Underground Injection Control WIC) • ❑j Locations a❑ED Permits O `❑t7 Facilities • ❑(t Directional'Wellbores El ®G1 Fiowlines';APPROVED) in— Gas Gathering System (Form 12) Ed Era Off -Location (Font 44) ❑- Removed 8 Q Crude Oil & Produced Water Transfer (Form 44) Active / Inactive I Abandoned .Active / Inactive /Abandoned Removed Figure 1 COGCC Map Viewer, 8/1/2022 Sincerely, Telesto Solutions, Inc, Taryn Tigges, PE Senior Engineer cc: Stephanie Fancher-English, Loveland Ready -Mix Concrete, Inc. 20220927 OGED TELESTO SOlUF,ONSFINCOXFOIA'• J I. Submit by Email Weld County Referral July 12, 2022 The Weld County Department of Planning Services has received the following item for review: Applicant Loveland Ready -Mix Concrete Inc Case Number USR22-0018 Please Reply By: August 9, 2022 Planner Kim Ogle Project: A Site Specific Development Plan and Use by Special Review Permit for Open Mining (sand, gravel and stone) and processing of minerals, employee and equipment associated with operations parking, outside of subdivisions and historic townsites, in the A (Agricultural) Zone District Parcel Number: 105903000027-R4180786 Legal: Part of the NE4 Section 3, T4N, R67W of the 6th P.M., Weld County, Colorado. Parcel Number 105903000045-R0932101 Legal: Part of the NE4 Section 3, T4N, R67W of the 6th P.M., Weld County, Colorado. Parcel Number: 095734000030-R1639586 Legal: Part of the SE4 Section 34, T5N, R67W of the 6th P.M., Weld County, Colorado. Location: North of and adjacent to County Road 48.5, west of and adjcaent to Highway 257 The application is submitted to you for review and recommendation. Any comments or recommendation you consider relevant to this request would be appreciated. Please reply by the above listed date so that we may give full consideration to your recommendation. Any response not received before or on this date may be deemed to be a positive response to the Department of Planning Services. If you have any further questions regarding the application, please call the Planner associated with the request. Please note that new information may be added to applications under review during the review process. If you desire to examine or obtain this additional information, please call the Department of Planning Services. 1 We have reviewed the request and find that it does / does not comply with our Comprehensive Plan because: We have reviewed the request and find no conflicts with our interests. See attached letter. I Signature \ Apr\ Agency ' WEST GREELEY CONSERVATION DISTRICT Date Weld County Planning Dept. 1555 N. 17th Ave, Greeley, CO 80631 (970)-440-6100 (970)-304-6498 fax I1 •yam T (y© v N .A .. _ 1is 4I _C cats t� "d 48 1/2 ■ - ter.— A-' tiT ,- rw. k +t• HII d 4 T b 'St 1 f IN West Greeley Conservation District (970) 356-8097 Below is list the their limitations to the USDA Weld County Soil Survey. a of soils and according S Map mbol Soil Name Soil Texture Shallow Excavations Dwe without ings Dwellings basements with Small Commercial Septic Absor�.tion Tank Prime Land Farm if Additional . . Comments l I 3 Aquolls Gravelly Substratum Severe Severe Severe Severe Severe No 61 Tassel Fine Sandy Loam Severe Severe No 64 Thedalund Loam Severe No 85 Water Source . �. • r The contact West Greeley our office Conservation at (970) District 356-8097.1f recommends you or the applicant that the applicant have any does questions an on please site soils feel test prior free to call to any our office. construction. For a more complete soils description consult the Weld County Soil Survey or . .� 5 _ GREEil Ey CONSERVAN. L . . _, .., I sTR cis i, i h ia. to ,..,. Produced by the West Greeley Conservation District Submit by Email Weld County Referral July 15, 2022 The Weld County Department of Planning Services has received the following item for review: Applicant Michael and Jennifer Rae Please Reply By: August 5, 2022 Project Family Farm Division Case Number FFD22-0017 Planner Kim Ogle Parcel Number: 045719200012-R8951898 Legal: N2NW4 SECTION 19, T9N, R65W of the 6th P.M., Weld County, Colorado. Location: East of and adjacent to CR 37; approximately 3800 -feet north of CR 102. The application is submitted to you for review and recommendation, Any comments or recommendation you consider relevant to this request would be appreciated. Please reply by the above listed date so that we may give full consideration to your recommendation. Any response not received before or on this date may be deemed to be a positive response to the Department of Planning Services. If you have any further questions regarding the application, please call the Planner associated with the request. Please note that new information may be added to applications under review during the review process. If you desire to examine or obtain this additional information, please call the Department of Planning Services. We have reviewed the request and find that it does I does not comply with our Comprehensive Plan because: We have reviewed the request and find no conflicts with our interests. See attached letter. Signature 4 Agency WEST GREELEY CONSERVATION DISTRICT Date Weld County Planning Dept. 1555 N. 17th Ave, Greeley, CO 80631 (970) 400-6100 (970)-304-6498 fax •r. county Road 104 I 0 CD i C f � 3 y 0 West Greeley Conservation District (970) 356-8097 Map Symbol Below is a list of the soils and their limitations accordin to the USDA Weld County Soil Survey. Soil Name Soil Texture 1 Altvan Fine Sandy Loam 47 Otero Sandy Loam Shallow Dwellings Dwellings with Small Septic Tank Prime Farm Excavations without basements Commercial Absorption _ Land (if Severe Slight Slight Slight Slight Slight Slight Severe Slight No Additional Comments • • The West Greeley Conservation District recommends that the applicant does an on site soils test prior to any construction. For a more complete soils description consult the Weld County Soil Survey or contact our office at (970) 356-8097. If you or the applicant have any questions please feel free to call our office. WEST GREELEY CON SERVATI*N DISTRICT Produced by the West Greeley Conservation District Submit by Email Weld County Referral July 12, 2022 The Weld County Department of Planning Services has received the following item for review: Applicant: Loveland Ready -Mix Concrete Inc Case Number: USR22-0018 Please Reply By: August 9, 2022 Planner: Kim Ogle Project: A Site Specific Development Plan and Use by Special Review Permit for Open Mining (sand, gravel and stone) and processing of minerals, employee and equipment associated with operations parking, outside of subdivisions and historic townsites, in the A (Agricultural) Zone District Parcel Number: 105903000027-R4480786 Legal: Part of the NE4 Section 3, T4N, R67W of the 6th P.M., Weld County, Colorado. Parcel Number: 105903000045-R0932101 Legal: Part of the NE4 Section 3, T4N, R67W of the 6th P.M., Weld County, Colorado. Parcel Number: 095734000030-R1639586 Legal: Part of the SE4 Section 34, T5N, R67W of the 6th P.M., Weld County, Colorado. Location: North of and adjacent to County Road 48.5, west of and adjcaent to Highway 257 The application is submitted to you for review and recommendation. Any comments or recommendation you consider relevant to this request would be appreciated. Please reply by the above listed date so that we may give full consideration to your recommendation. Any response not received before or on this date may be deemed to be a positive response to the Department of Planning Services. If you have any further questions regarding the application, please call the Planner associated with the request. Please note that new information may be added to applications under review during the review process. If you desire to examine or obtain this additional information, please call the Department of Planning Services. I _ I 4 We have reviewed the request and find that it does / does not comply with our Comprehensive Plan because: We have reviewed the request and find no conflicts with our interests. See attached letter. Signature Clayton Orback g Date July 22, 2022 Agency Little Thompson Water District Weld County Planning Dept. 1555 N. 17th Ave, Greeley, CO 80631 (970)-440-6100 (970)-304-6498 fax Directors: Emily McMurtrey, President Steve Brandenburg Larry Brandt Ryan Heiland Ed Martens Bill Szmyd James Walker Little Thompson Water District District Manager: Amber Kauffman 835 E Highway 56 Berthoud, CO 80513 P: 970-532-2096 F: 970-532-3734 www.LTWD.org Date: 7/22/2022 To: Kim Ogle — Weld County From: Clayton Orback — Little Thompson Water District Subject: Weld County Referral USR22-018, Loveland Ready -Mix, Reviewed by LTWD 7/22/2022. Ms. Ogle, Little Thompson Water District (LTWD) currently serves five (5) residential taps (taps 837, 5027, 835, 53, and 1521), from a 6 -inch diameter waterline that we own and operate along the north side of Weld County Road 48 '/2 (see attached map). The applicant will need to coordinate with LTWD to minimize impacts to the existing infrastructure. Please see the attached comments on the plans. Thank you and please contact the District with any questions. Respectfully, Clayton Orback LTWD Engineering Business Support II Attachments cc: Jake Hebert, PE — Little Thompson Water District LTWD Waterlines (Approximate Locations): Loveland Ready -Mix 24355 9000 Ile4361 V tiyimperar-.`7 y awerre LTWD Infrastructure to be Protected in Place. 23566 7/19/2022, 10:24:17 AM 1:8,436 0 0 24514 0.05 I I' 0.07 23646 0.1 0.2 mi 0.15 0.3 km Joe Robinson, Source: Esri, Maxar, Earthstar Geographics, and the GIS User Community ArcGIS Web AppBuilder Maxar I Joe Robinson cOE d a -il CO] 7IGICtti{ Wl*1ii7*llaif7 4765 p;. 1',. r••,r I . ♦,.iIIIIIIIItIIIp_ e V\ Gi � a ♦ a 1,1 Oio ` o O • � V O ° •• -0• PIT INLET EIR • G Cl SOU WEST WETLAND I \` PIT INLET WEIR ri • 4 Cl 5.11 yrs Cl 6.76 yrs Cl 8.44 yrs N. ,s' • • �{ �. �.. ,� )mot .. .�y� �\ I 1"j t yN l I0 f ° I I4f � I II TOWN OF MILLIKEN 30' A=1 PERMANENT EASEMENT II I I TOWN OF MILLIKEN I 20' TEMPORARY I 1 EASEMENT ° EASEMENT OF WAY I` I I THE MOUNTAIN I STATES TELEPHONE I AND TELEGRAPH I COMPANY 50' M!V4 I tel <eloh� W ❑ ❑�eI o ❑ 9 �� 9 g 60'ROW (30' DEDICATED ON EITHER SIDE OF SECTION LINE) 7... -�"1 / •\ 4760 C1 2.3 yrs \\ PROPOSED C2 60' 20.81 yr C2 BRIDGE !w-01 I 19.14 yrs ®MW - C1 10.24 yrs a d C \ q. Q�. Cl SOUTHEAST WETLAND C1 \ 1.26 yrs e.• ®MW -05 N.\ 4 \ / + + \ ADJUSTABLE OUTLET WEIR WITH 50' OIL & GAS LINE + + + - EASEMENT 'r PANDHANDLE EASTERN HO _ PIPE LINE COMPANY -1� C2 EAST WETLAND'{ \\ ADJUSTABLE OUTLET WEIF WITH 1 / �j DISCHARGE CULVERT � \ � \ / 17.69 yrs 16.17 yrs • KERR-MCGEE f OIIL& e OIL 8 GASAS S. FACILITY 1% I. 50' OIL & GAS LINE 4. EASEMENT .G PANDHANDLE I EASTERN PIPE LINE COMPANY U e7 WCR48112 --__ '/1 COUNTY ROAD ROW 30' ON • EITHER SIDE OF SECTION AND 60'R W TOWNSHIP LINE ° cti C3 14.57 yrs PROPOSED STORMWATrR CULVERTS �MW-09 C3 TO REMAIN UNTIL END IF C3 !2.73 yrs C3 3.08 yrs C1/C3 11.63 yrs 0 E C. PIT INLET/OUTLET WEIR C3 EAST WETLAND W V/ W Tom- ur s.ac _ �_ w ="_ te PROPOSED ACCESS ROAD T RE IN TIL D O C3 • 0 n O� D ,�• FARM PONI LTWD owns and operates a 6' 77 AC waterline. Call out to protect ° .a in place. D PROPERTY DESCRIPTION The NE'/4 of Section 3, Township 4 North, Range 67 West of the 6th P.M., Weld County, Colorado, except the following described parcels: 1. A strip of land conveyed to the Union Pacific Railroad Company by Deed recorded September 25, 1908 in Book 287 at Page 74, being more particularly described as follows: Y P Y P9 A strip, piece or parcel of land 200 feet in width, being 100 feet in width on each side of the center line of the main track of Union Pacific Railroad (known as the Denver to Fort Collins line) as the same has been surveyed, located and staked out through, upon, over and across the NE 1/4 of Section 3 Township 4 North, Range 67 West of the 6th P.M. 2. That portion of land conveyed to The Department of Highways, State of Colorado by Deed recorded April 4, 1961 in Book 1581 at Page 409, described as follows: A tract of parcel of land, No. 16 Project No. S 0057 (2) in the E1/2NE1/4 of Section 3, Township 4 North, Range 67 West of the 6th P.M., more particularly described as follows: Beginning at a point on the property line from which the NE corner of Section 3 bears N. 26° 13' E., a distance of 175.7 feet; 1. Thence S. 68° 07' 30" E., along the property line, a distance of 86.7 feet to the E. line of Sec. 3; 2. Thence S. 00 51' 30" E., along the E. line of Sec. 3, a distance of 1,749.6 feet; \ 3. Thence N. 42° 57' 30" W., along the existing northeasterly right of way line of the Dent -FT. Collins Branch of the Union Pacific Railroad, as located Dec., 1960, a distance of 74.6 feet, to the existing W. right of way line of the S.H. 257, as located December, 1960; 4. Thence N. 2° 08' W. along the existing W. right of way line of S.H. 257, as located December 1960, a distance of 134.6 feet; 5. Thence N. 0° 51' 30" W., along the existing W. right of way line of S.H. 257, a° s located December, 1960, a distance of 833.0 feet; 6. Thence N. 03° 26' W., a distance of 600.6 feet; 7. Thence N. 00511 30" W., a distance of 160.2 feet, more or less, to the point of beginning. ALSO A tract or parcel of land No. 17 of Colorado Department of Highways Project No. S 0057 (2) in the SE1/4NE1/4 of Section 3, being more particularly described as follows: Beginning at the point on the S. line of the NE'/4 of the Section 3, Township 4 North, Range 67 West, from the SE corner of the NE'/4 of Sec. 3 bears S. 88° 21 30" E., a distance of 90.1 feet; 1. Thence N. 0° 51' 30" W., a distance of 30.0 feet to the existing N. right of way line of the County Road, as located December, 1960; 16.5' RIGHT OF WAY 2. Thence S. 88° 21' 30" E., along the existing N. right of way line of County Road, as located December, 1960, a distance of 50.0 feet; EASEMENT 3. Thence N. 0051130 " W., along the existing W. right of way line of S.H. 257, as located December, 1960, a distance of 17.6 feet; 4. Thence N. 37° 42' W., along the property line, a distance of 29.5 feet; THE MOUNTAIN STATES 5. Thence N. 380 46' 30" E., a distance of 12.0 feet; TELEPHON E AND 6. Thence N. 00 51' 30" W., a distance of 568.5 feet to the existing southwesterly right of way line of the Dent -Ft. Collins Branch of the Union Pacific Railroad, as located December, 1960; 7. Thence S. 42° 57' 30" E., along the existing southwesterly right of way line of the Dent -Ft. Colins Branch of the Union Pacific Railroad, as located December 1960, a distance of 74.6 feet to the E. line of TELEGRAPH COMPANY Sec. 3; 8. Thence S. 00 51' 30" E., along with the E. line of Sec. 3, a distance 590.3 feet to the SE corner of the NE'/4 of the Sec. 3; 9. Thence N. 88° 21' 30" W., along with the S. line of the NE'/4 of the Sec. 3, a distance of 90.1 feet, more or less, to the point of beginning. 3. That portion of land conveyed to the Department of Highways by Deed recorded April 11, 1961 in Book 1582 at Page 183, described as follows: A tract or parcel of land No. 17A of Colorado Dept.. of Highways' project No. S 0057 (2) in the SE1/4NE1/4 of Section 3, Township 4 North, Range 67 West, of the 6th P.M., being more particularly 1 00' ROW described as follows: Beginning at a point on the existing N. right of way line of County Road, as located December, 1960, from which the SE corner of the NE'/4 of Sec. 3 bears S. 70° 12' 30" E., a distance of 96.2 feet; 1. Thence, N. 380 46' 30" E., a distance of 50.7 feet to the northeasterly property line; 2. Thence, S. 37° 42' E., along the northesterly property line, a distance of 29.5 feet to the existing W. right of way line of S.H. 257, as located December, 1960; 3. Thence, S. 0°51' 30" E., along the existing W. right of way line of S.H. 257, as located December, 1960, a distance of 17.6 feet; 4. Thence, N. 88° 21'30" W., along the existing N. right of way line of the County Road, as located December, 1960, a distance of 50.0 feet, more or less to the point of beginning. 4. The portion of the NE 1/4 conveyed to Blehm Land and Cattle Co., a Wyoming Corporation by Deed recorded April 5, 1979 in Book 865 as Reception No. 1786578, being described as follows: All that part of the NE /4 of Section 3, Township 4 North, Range 67 West of the 6th Weld County, Colorado, lying Northerly and Easterly of the Right -of -Way of the Union Pacific Railroad Company, 9 P.M., h', Y 9 9 Y P Y, EXCEPT those parcels conveyed to Weld County by deed recorded in Book 114 at Page 491 and to the Department of Highways by deed recorded in Book 1581 at Page 409. 5. Lot "A" of Recorded Exemption No. 1059 -03 -1 -RE 889, according to map recorded October 1, 1986 in Book 1130 as Reception No. 2071677, being a portion of the NE'/4 of Section 3, Township 4 North, Range 67 West of the 6th P.M., Weld County, Colorado, and Lot "B" of Amended Recorded Exemption No. 1059 -03 -1 -RE 889, according to Deed recorded June 21, 2001 as Reception No. 2859250, being a portion of the NE'/4 of Section 3, Township 4 North, Range 67 West of the 6th P.M., Weld County, Colorado. Lot B is described as follows: Considering the Southerly line of the Northeast Quarter of said Section 3, as bearing N 88°21'30"W and with all bearings contained herein relative thereto: From the CenterQuarter comer of said Section 3; THENCE S 88°21'30"E the Southerly line of said Northeast Quarter, 283.00 feet to the Southeasterly comer of Lot A of Recorded Exemption No. along P 1059-03-1-RE889, recorded in Book 1130 as Reception No. 2071677 of the Weld County Records and the POINT OF BEGINNING; THENCE N 00°51'30"W along the Easterly line of said Lot A, 205.01 feet to the Northeasterly comer of said Lot A; THENCE N 88°21'30"W along the Northerly line of said Lot A, 136.00 feet to an angle point in said Lot A; THENCE N 00°51'30"W along the Easterly line of said Lot A, 90.00 feet to the Northeasterly line of said Lot A; THENCE N 88°21'30"W the Northerly line of said Lot A, 148.04 feet to apoint on the Westerly line of the Northeast Quarter of said along Section 3; THENCE N 01°03'33"W along said Westerly line, 313.36 feet; THENCE leaving said Westerly line S 88°21'30"E, 749.14 feet; THENCE S 05°04'30"W, 608.84 feet to a point on the Southerly line of the Northeast Quarter of said Section 3: THENCE N 88°21'30'W along said Southerly line, 401.01 feet to the POINT OF BEGINNING. Said tract of land containing 8.360 Acres, more or less. PARCEL #2 INSET MAP A strip of land 100 feet in width, being 50 feet wide on each side of a centerline through the NE'/4 of Section 3, Township 4 North, Range 67 West of the 6th P.M., Weld County, Colorado, said center line 0 100 being more fully described as follows: Beginning at a point on the North line of the County Road on the south of said NE'/4 51 feet more or less, west of the West line of the County Road on the east of said NE 1/4 ; thence North 37° 42' West 3238 SCALE IN FEET feet; thence Northwesterly on a 10 30' curve to the left 347 feet to a point on the North line of said NE 1%, 463 feet east of the northwest corner thereof, a total distance of 3585 feet. PARCEL #3 th That portion of the SE 1/4 of Section 34, Township 5 North, Range 67 West of the 6 P.M., Weld County, Colorado, lying and being South and West of the Right -of -Way of the Union Pacific Railroad Company, excepting therefrom a parcel of land deeded to The Denver, Laramie and Northwestern Railway Company, a corporation by Deed recorded May 12, 1909 in Book 300 at Page 580, being described as follows: All that part of parcel of land situated in the SE 14 of Section 34, lying southwesterly of the southwesterly boundary line of the Union Pacific Railroad Company's right of way and Northeasterly of a line drawn 50 feet southwesterly of andparallel to the center line of the Denver, Laramie and Northwestern Railway as now located, surveyed and staked out over and across said SE /4 said center line being more fully Y r"/ described as follows: Beginning at a point on the South line of said SE ¼, 907 feet east of the Southwest corner thereof; thence in a Northwesterly direction on a 1° 30" curve to the left 986.3 feet; thence North 570 42" West 1662 feet to a point on the west line of said SE ¼, 708 feet North of the Southwest corner thereof, a total distance of 1152.5 feet, GROSS LAND AREA: 114.253 ACRES, MORE OR LESS MINE PLAN c¼kk\\\ C EQUIPMENT LIST LONG REACH EXCAVATOR FRONT-END LOADER s. WATER TRUCK ACTIVE MINING CELL INCREMENTAL MINED AREA (AC) TOTAL MINED AREA (AC) INCREMENTAL OVERBURDEN VOLUME (YD3) INCREMENTAL GRAVEL VOLUME (YD3) INCREMENTAL GRAVEL WEIGHT (TONS) CUMULATIVE GRAVEL WEIGHT (TONS) PRODUCTION YEARS AT END OF INCREMENT Cl 0-5 5.0 772 157,020 251,232 251,232 1.26 Cl 5-10 10.0 13,017 130,178 208,284 459,516 2.30 Cl 10-15 15.0 11,811 145,593 232,949 692,465 3.46 Cl 15-20 20.0 6,524 205,573 328,917 1,021,382 5.11 Cl 20-25 25.0 4,153 206,724 330,759 1,352,141 6.76 Cl 25-30 30.0 5,594 209,830 335,728 1,687,868 8.44 Cl 30-35 35.0 7,956 224,537 359,259 2,047,127 10.24 C1/C3 35-40 40.0 2,991 174,586 279,338 2,326,465 11.63 C3 40-45 45.0 4,453 180,542 288,867 2,615,331 13.08 C3 45-50 50.0 4,640 186,147 297,835 2,913,166 14.57 C3 50-55 55.0 5,434 200,906 321,449 3,234,615 16.17 C3/C2 55-60 60.0 3,727 189,131 302,610 3,537,226 17.69 C2 60-65 65.0 313 181,780 290,849 3,828,074 19.14 C2 65-70 70.0 1,079 208,974 334,358 4,162,432 20.81 C3 70-75.9 75.9 7,594 239,323 382,916 4,545,348 22.73 PROPERTY OWNER'S CERTIFICATION The undersigned property owner(s) do(es) hereby agree to the Site Specific Development Plan and Use by Review Development Standards as described hereon this day of 20 Name of Property Owner Name of Property Owner PLANNING COMMISSION CERTIFICATION This is the certify that the Weld County Planning Commission has certified and does hereby recommend Board of County Commissioners, Weld County, Colorado, for its confirmation, approval and adoption th Specific Development Plan and Use by Special Review as shown and described hereon this 20 Chair, Weld County Planning Commission BOARD OF COUNTY COMMISSIONERS CERTIFICATION This is to certify that the Board of County Commissioners, Weld County, Colorado, does hereby confirm anc this Site Specific Development Plan and Use by Special Review and the Development Standards as shov described hereon this day of , 20 Chair, Board of County Commissioners ATTEST: Weld County Clerk to the Board BY: Deputy Clerk to the Board Dated: LEGEND/NOTES EXISTING 5' CONTOURS PROPOSED 5' CONTOURS PROPERTY LINE/ SPECIAL REVIEW PERMIT AREA EXISTING EASEMENT EXISTING RIGHT-OF-WAY g EXISTING GAS LINE ohw EXISTING OVERHEAD WIRE w EXISTING WATER LINE te, EXISTING TELEPHONE EXISTING FENCE LINE o EXISTING COMM. LINE EXISTING RIVER OHWM PROPERTY LINE OFFSET 500' ACTIVE MINE CELL BOUNDARY PRODUCTION YEARS AT END OF INCREMENT RIVER DITCHES PROPOSED 100 YEAR FLOODPLAIN BOUNDARY RECLAIMED PONDS PROPOSED TREES & SHRUBS 4 " ' PROPOSED WETLAND a•at•s r GRASSES MONITORING WELL 0 300 SCALE IN FEET COORDINATE SYSTEM NAD83 COLORADO STATE PLANE, NORTH, US SURVEY FEET , 39 Q, LIC�cN .�� • F 55133 • s/t/fl!% T �Ss�ONAL Ego REVISIONS # DESCRIPTION P�� 41 QeO 0 DRAFT FOR COMMENT 12/8/2021 JM/TT TT USR SUBMITTAL /20/2022 TT TT DATE 5/20/2022 PROJECT 360100 TASK NUMBER 006-01 DRAWN BY TT PROJECT ENGINEER TT CHECKED BY WN DUNN PIT USR MAP EXTRACTION PLAN MAP SHEET NUMBER: REVISION NUMBER: 2 0 PREPARED BY: TELESTQ LE ST® S O L U T I 0 N S. I N C 0 R P 0 RATE D PREPARED FOR: LOVELAND READY•MIX CONCRETE TELESTO SOLUTIONS + I N C O R P O R A T E D September 27, 2022 Via Electronic Mail Kim Ogle Weld County Planning Department 1555 North 17th Avenue Greeley, Colorado 80631 Subject: Loveland Ready -Mix USR Permit Submittal Case No. USR22-0018 Dear Mr. Ogle: Loveland Ready -Mix Concrete, Inc. (LRM) received the letter dated July 22, 2022, from the Little Thompson Water District (LTWD). This letter serves as LRM's response to LTWD's comments and recommendations. LRM understands that LTWD owns and operates a 6 -inch diameter waterline along the north side of Weld County Road 48 1/2 and currently serves five (5) residential taps. LRM shows the 6" waterline on the USR plan maps and plans no excavation activities within LTWD's easement. LRM's plan protects the pipeline from potential excavation activities and shows that no damage will occur from slope failures (see DRMS permitting file, M2021-059). LRM will coordinate with LTWD should plans change that could potentially impact the existing pipeline. Sincerely, Telesto Solutions, Inc. `i-iefer Taryn Tigges, PE Senior Engineer TMT:wln cc: Stephanie Fancher-English, Loveland Ready -Mix Concrete, Inc. Colorado Office (Corporate) New Mexico Office 750 14th Street SW Loveland, Colorado 80537 970-484-7704 / 970-484-7789 (FAX) 1303 Pope Street Silver City, New Mexico 88061 575-538-5620 / 575-538-5625 (FAX) FRONT RANGE FIRE RESCUE PO Box 130, Milliken, CO 80543 970-587-4464 / Fax: 970-587-0324 Courage * Compassion * Professionalism Serving Johnstown, Milliken, and Weld County for more than 100 years FIRE DISTRICT REVIEW COMMENTS Applicant: Loveland Ready Mix Project: Dunn Pit Location: NW corner of State Highway 257 and Weld County Road 48.5 Plan Intake Date: 07/12/2022 Comment Date: 08/09/2022 Comments By: Tyler Drage, Deputy Chief/Fire Marshal These comments pertain to a Use by Special Review (USR) application provided to FRFR for review. The USR is for a proposed aggregate mining operation referred to as the Dunn Pit, which consists of approx. 118 acres, generally located northwest of the intersection of State Highway 257 and Weld County Road 48.5. The application indicates the overall project will include extraction of minerals via surface mining. The project will be located within the Front Range Fire Rescue Fire Protection District. With regard to fire and life safety issues, all requirements of the adopted 2018 International Fire Code (IFC), including all appendices and local amendments were applied to this review. THIS USE BY SPECIAL REVIEW IS ACCEPTED BY FRONT RANGE FIRE RESCUE FOR SITE DEVELOPMENT ACTIVITIES. NO BUILDING CONSTRUCTION OR STORAGE/DISPENSING OF HAZARDOUS MATERIALS MAY COMMENCE WITHOUT PLAN REVIEW AND PERMITTING FROM FIRE DISTRICT. REQUIRED FIRE DISTRICT PERMITS AND FEES Pursuant to the Consent to Enforce Resolution, and in accordance with Chapter 1 of the 2018 International Fire Code, FRFR requires a complete plan review and permit for all new buildings as well as proposed new storage, dispensing, and/or use of hazardous materials. Information provided indicates plans for installation and use of several above -ground fuel storage tanks. Fire district plan review and permitting is required prior to installation and/or use of any such facilities. FRFR Comments: Loveland Ready Mix - USR22-0018 (08-09-2022) State of Colorado Fire Inspector III/Plans Examiner cert # 136302270 ICC Certified Fire Marshal / Fire Codes Specialist, cert # 5303856 Page 1 FRONT RANGE FIRE RESCUE PO Box 130, Milliken, CO 80543 970-587-4464 / Fax: 970-587-0324 Courage * Compassion * Professionalism Serving Johnstown, Milliken, and Weld County for more than 100 years FIRE DISTRICT REVIEW COMMENTS HAZARDOUS MATERIALS STORAGE/USE/DISPENSING: Information has not been provided regarding the Applicant's intent to install and use above -ground storage tanks for the storage and/or dispensing of hazardous materials (e.g., diesel fuel, asphaltic cement, oil, etc.). • The Applicant is informed that fire district plan review and permitting is required prior to installation and/or use of any above -ground storage tank (AST) that contains hazardous materials. • In addition to a detailed site plan, the Applicant shall provide details and specifications for all ASTs, as well as a Hazardous Materials Inventory Statement and a Hazardous Materials Management Plan and/or a Spill Prevention Control and Countermeasure Plan (SPCC) prior to installation and/or use of any AST. ACCESS ROADS, ADDRESSING AND SIGNS: Information has not been specifically provided regarding the engineering of the proposed access roads into and within the proposed mining operation. All access roads shall comply with Section 503.2 and Appendix D of the 2018 IFC. o No access road shall be less than 20 feet in width. o All access roads shall be constructed with an all-weather surface that can support an 80,000 -pound fire apparatus. o Maximum grade of roadway shall not exceed 10%. o The angle of approach and departure for any roadway shall not exceed 8 degrees. o Turning radius for all roadways shall be 25 -feet inside/50-feet outside. o All cul-de-sacs shall have a minimum diameter of 100 feet. • If a security gate is installed across any access road, the Applicant shall equip it with a fire district approved Knox padlock, key switch or key pad. • The facility is required to have a posted street address. • The Applicant shall clearly and conspicuously post the facility address on Weld County Road 48.5 throughout all stages of site development. • Address numerals shall be a minimum of four (4) inch height with a half -inch stroke width and shall be a contrasting color with their background. WATER SUPPLY: No information has been provided to show the location(s) of the nearest fire hydrant(s) to the proposed facility. • Fire hydrant(s) may be required to protect buildings and/or hazardous operations on the property. FRFR Comments: Loveland Ready Mix - USR22-0018 (08-09-2022) State of Colorado Fire Inspector III/Plans Examiner cert # 136302270 ICC Certified Fire Marshal / Fire Codes Specialist, cert # 5303856 Page 2 TELESTO 5 O L U T l O N 5• I N C O K P O K A 1' E L7 September 27, 2022 Via Electronic Mail Kim Ogle Weld County Planning Department 1555 North 17th Avenue Greeley, Colorado 80631 Subject: Loveland Ready -Mix USR22-0018 Front Range Fire Rescue Referral Response Dear Mr. Ogle: Loveland Ready -Mix Concrete, Inc. (LRM) received the letter dated August 9, 2022, from Tyler Drage of Front Range Fire Rescue Fire Protection District (FRFR). This letter serves as LRM's response to FRFR's comments and recommendations. Hazardous Materials Storage/Use/Dispensing 1. Information has not been provided regarding the Applicant's intent to install and use above -ground storage tanks for the storage and/or dispensing of hazardous materials (e.g., diesel fuel, asphaltic cement, oil, etc.). 2. The Applicant is informed that fire district plan review and permitting is required prior to installation and/or use of any above -ground storage tank (AST) that contains hazardous materials. 3. In addition to a detailed site plan, the Applicant shall provide details and specifications for all ASTs, as well as a Hazardous Materials Inventory Statement and a Hazardous Materials Management Plan and/or a Spill Prevention Control and Countermeasure Plan (SPCC) prior to installation and/or use of any AST. LRM Response LRM will not install or use any ASTs at this site. Access Roads, Addressing and Signs 1. Information has not been specifically provided regarding the engineering of the proposed access roads into and within the proposed mining operation. All access roads shall comply with Section 503.2 and Appendix D of the 2018 IFC. a. No access road shall be less than 20 feet in width. b. All access roads shall be constructed with an all-weather surface that can support an 80,000 -pound fire apparatus. Colorado Office (Corporate) New Mexico Office 750 14th Street SW Loveland, Colorado 80537 970-484-7704 / 970-484-7789 (FAX) 1303 Pope Street Silver City, New Mexico 88061 575-538-5620/575-538-5625 (FAX) To: Kim Ogle Date: September 27, 2022 Page 2 c. Maximum grade of roadway shall not exceed 10%. d. The angle of approach and departure for any roadway shall not exceed 8 degrees. e. Turning radius for all roadways shall be 25 -feet inside/50-feet outside. f. All cul-de-sacs shall have a minimum diameter of 100 feet. 2. If a security gate is installed across any access road, the Applicant shall equip it with a fire district approved Knox padlock, key switch or key pad. 3. The facility is required to have a posted street address. 4. The Applicant shall clearly and conspicuously post the facility address on Weld County Road 48.5 throughout all stages of site development. 5. Address numerals shall be a minimum of four (4) inch height with a half -inch stroke width and shall be a contrasting color with their background. LRM Response The access road will be 28 -feet wide with a minimum of 65 -ft turning radius. Other roads on site will be temporary haul roads for mining equipment. There will not be any cul-de- sacs on site. There will be a security gate at the access road from County Road 48 '/2, equipped with a fire district approved Knox padlock. LRM will obtain a facility address, if required. LRM will build no buildings on site. LRM's plan is to excavate aggregate, create three reclamation ponds, and reclaim the site for a post -mining land use of grazing and wildlife habitat. Water Supply 1. No information has been provided to show the location(s) of the nearest fire hydrant(s) to the proposed facility. 2. Fire hydrant(s) may be required to protect buildings and/or hazardous operations on the property. LRM Response If a water source is necessary for the planned construction activities, LRM proposes the mining cells/reclaimed ponds as an emergency water source. No buildings or hazardous operations are proposed on -site. 20220927 FireDistrict TELESTO To: Kim Ogle Date: September 27, 2022 Page 3 Sincerely, Telesto Solutions, Inc. -2 Taryn Tigges, PE Senior Engineer TMT:wln cc: Stephanie Fancher-English, Loveland Ready -Mix Concrete, Inc. 20220927 FireDistrict TELESTO Submit by Email Weld County Referral July 12, 2022 The Weld County Department of Planning Services has received the following item for review: Applicant: Loveland Ready -Mix Concrete Inc Case Number: USR22-0018 Please Reply By: August 9, 2022 Planner: Kim Ogle Project: A Site Specific Development Plan and Use by Special Review Permit for Open Mining (sand, gravel and stone) and processing of minerals, employee and equipment associated with operations parking, outside of subdivisions and historic townsites, in the A (Agricultural) Zone District Parcel Number: 105903000027-R4480786 Legal: Part of the NE4 Section 3, T4N, R67W of the 6th P.M., Weld County, Colorado. Parcel Number: 105903000045-R0932101 Legal: Part of the NE4 Section 3, T4N, R67W of the 6th P.M., Weld County, Colorado. Parcel Number: 095734000030-R1639586 Legal: Part of the SE4 Section 34, T5N, R67W of the 6th P.M., Weld County, Colorado. Location: North of and adjacent to County Road 48.5, west of and adjcaent to Highway 257 The application is submitted to you for review and recommendation. Any comments or recommendation you consider relevant to this request would be appreciated. Please reply by the above listed date so that we may give full consideration to your recommendation. Any response not received before or on this date may be deemed to be a positive response to the Department of Planning Services. If you have any further questions regarding the application, please call the Planner associated with the request. Please note that new information may be added to applications under review during the review process. If you desire to examine or obtain this additional information, please call the Department of Planning Services. n We have reviewed the request and find that it does / does not comply with our Comprehensive Plan because: n We have reviewed the request and find no conflicts with our interests. n See attached letter. Pepper McClenahan/Milliken Trust Signature Date August 15, 2022 Agency Town of Milliken Weld County Planning Dept. 1555 N. 17th Ave, Greeley, CO 80631 (970)-440-6100 (970)-304-6498 fax August 15, 2022 Kim Ogle Weld County Planning Department 1555 N. 17th Ave. Greeley, CO 80631 Good morning Kim: Milliken staff and Board of Trustees considered the USR application information for USR22- 0018, Loveland Ready Mix, at their August 10, 2022. The Board of Trustees requests that the Weld County Board of County Commissioners give consideration to the concerns of nearby property owners. Please give me a call at (970) 660-5046 if you have questions. Sincerely, J eppeL JVIcCeeacd arc Pepper McClenahan, AICP Community Development Director cc: Cheryl Powell, Town Administrator Caree Rinebarger, Town Clerk Town Hall 11401 Broad St., Drawer 290 Milliken, CO 80543 (91f0) 587-4331 Far (970) 587-2678 From: Hice-Idler - CDOT, Gloria <gloria.hice-idler@state.co.us> Sent: Monday, July 25, 2022 4:24 PM To: Kim Ogle <kogle@weldgov.com> Cc: Timothy Bilobran - CDOT <timothy.bilobran@state.co.us>; Allyson Young - CDOT <allyson.young@state.co.us>; Heather Perkins - CDOT <heather.perkins@state.co.us> Subject: USR22-018/Loveland Ready Mix/SH 257 off Caution: This email originated from outside of Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. It does not appear that the TIS looked at the impact that this site will have to the SH 257/WCR 48.5 intersection. If traffic is proposed to increase at this location by more than 20% a new access permit will be needed. CDOT will also be looking at the volumes to determine if highway improvements are required as a result of the traffic. If traffic is not proposed to increase traffic by more than 20%, CDOT will not have the warrant necessary to re-evaluate the intersection. Gloria Hice-Idler Rocksol Consulting (970) 381-8629 10601 W. 10th Street, Greeley, CO 80634 gloria.hice-idler®state.co.us I www.codot.gov I www.cotrip.org Submit by Email Weld County Referral Y July 12, 2022 The Weld County Department of Planning Services has received the following item for review: Applicant: Loveland Ready -Mix Concrete Inc Case Number: USR22-0018 Please Reply By: August 9, 2022 Planner: Kim Ogle Project: A Site Specific Development Plan and Use by Special Review Permit for Open Mining (sand, gravel and stone) and processing of minerals, employee and equipment associated with operations parking, outside of subdivisions and historic townsites, in the A (Agricultural) Zone District Parcel Number: 105903000027-R4480786 Legal: Part of the NE4 Section 3, T4N, R67W of the 6th P.M., Weld County, Colorado. Parcel Number: 105903000045-R0932101 Legal: Part of the NE4 Section 3, T4N, R67W of the 6th P.M., Weld County, Colorado. Parcel Number: 095734000030-R1639586 Legal: Part of the SE4 Section 34, T5N, R67W of the 6th P.M., Weld County, Colorado. Location: North of and adjacent to County Road 48.5, west of and adjcaent to Highway 257 The application is submitted to you for review and recommendation. Any comments or recommendation you consider relevant to this request would be appreciated. Please reply by the above listed date so that we may give full consideration to your recommendation. Any response not received before or on this date may be deemed to be a positive response to the Department of Planning Services. If you have any further questions regarding the application, please call the Planner associated with the request. Please note that new information may be added to applications under review during the review process. If you desire to examine or obtain this additional information, please call the Department of Planning Services. P P I" We have reviewed the request and find that it does / does not comply with our Comprehensive Plan because: We have reviewed the request and find no conflicts with our interests. See attached letter. Signature Mike Grooms Date 7/28/2022 Agency Colorado Parks and Wildlife Weld County Planning Dept. 1555 N. 17th Ave, Greeley, CO 80631 (970)-440-6100 (970)-304-6498 fax COLORADO Parks and Wildlife Department of Natural Resources Area 4 317 W Prospect Rd Fort Collins, CO 80526 P 970.472.4300 I F 970.472.4458 July 28, 2022 Kim Ogle Weld County Planning Department 1555 North 17th Avenue Greeley, CO 80631 970.400.6100 kogle@weldgov.com Re. Loveland Ready -Mix Concrete Inc., Case No. USR22-0018, at or near Section 3, Township 4N, Range 67W, 6th Principle Meridian and Section 34, Township 5N, Range 67W, 6th Principle Meridian in Weld County. Ms. Ogle, Thank you for the opportunity to comment on the Loveland Ready -Mix Concrete Inc. open mining project. The mission of Colorado Parks and Wildlife (CPW) is to perpetuate the wildlife resources of the state, to provide a quality state parks system, and to provide enjoyable and sustainable outdoor recreation opportunities that educate and inspire current and future generations to serve as active stewards of Colorado's natural resources. CPW has a statutory responsibility to manage all wildlife species in Colorado; as such we encourage protection for Colorado's wildlife species and habitats through responsible development and land use planning. Our goal in responding to land use proposals is to provide complete, consistent, and timely information to all entities who request comments on matters within our statutory authority. One way we accomplish our mission is by responding to land use requests, as is the case for this proposed open gravel mine project. The protection of High Priority Habitats (HPHs) is of extreme importance to CPW. CPW recommends that all proposed projects be assessed to prevent the loss of habitat or fragmentation of habitat as well as to avoid, minimize, or mitigate impacts to wildlife species sensitive to development, which can include species of concern, big game winter concentration areas, raptor nests, and breeding and nesting habitats for ground -nesting birds. Heather Dugan, Acting Director, Colorado Parks and Wildlife • Dan Prenzlow, Director, Colorado Parks and Wildlife Parks and Wildlife Commission: Carrie Besnette Hauser, Chair • Dallas May, Vice -Chair • Marie Haskett, secretary • Taishya Adams Karen Bailey • Betsy Blecha • Gabriel Otero • Duke Phillips, IV • Richard Reading • James Jay Tutchton • Eden Vardy Therefore, CPW recommends the following wildlife protection measures - based on the proposed work boundary that intercepts or is near the following HPHs: • Bald Eagle Active Nest Site (1/2 £t 1/4 -mile nesting buffer) o An active Bald Eagle nest site is a specific location in which a pair of Bald Eagles has attempted to nest within the last five years. Any nest location that can be directly tied to courtship, breeding, or brooding behavior is considered active. CPW has two buffer recommendations to protect these sites: a) a year- round restricted surface occupancy (RSO) 0.25 -mile buffer of any active Bald Eagle nest site, and b) a seasonal (December 1 to July 31) no new human encroachment or permitted/authorized human activities 0.5 -mile buffer of any active bald eagle nest site. Note: The Bald Eagle is designated as an avian Priority Tier 2 Species of Greatest Conservation Need within CPW's 2015 Colorado State Wildlife Action Plan. This designation denotes that these species are in need of conservation attention in Colorado and are provided a relative degree of conservation management priority. • CPW has documented an active Bald Eagle nest in Township 5N, Range 67W, Section 33 which lies approximately one (1) mile west of the project boundary. While the 1/4 -mile and 1/2 -mile buffers extend outside of the project boundary, CPW recommends that pre - construction nest surveys be conducted by the applicant prior to any surface disturbance or occupancy. If a nest site is found within the project boundary, consultation with CPW is advised. • Mule Deer Severe Winter Range o Mule Deer Severe Winter Ranges are defined as that part of the overall winter range where 90% of the individuals are located when the annual snowpack is at its maximum and/or temperatures are at a minimum in the two worst winters out of ten. The entire project boundary lies within Mule Deer Severe Winter Range HPH. • Therefore, CPW recommends no initial ground disturbances, construction activities or occupancy within the project boundary from December 1 to April 30. o Furthermore, CPW recommends using wildlife -friendly fencing throughout the development, in particular, along the boundaries that borders the Big Thompson River. Wildlife -friendly fencing may include four -strand smooth wire as further discussed in CPW's "Fencing with Wildlife in Mind" brochure. • Aquatic Native Species o There are sensitive aquatic native species (fish and amphibians) located within the Big Thompson River. • Therefore, CPW recommends No Surface Occupancy and No Ground Disturbances (year-round) within 500 feet of the Ordinary High Water Mark of the Big Thompson River, as well as implementing appropriate storm water BMPs. • Noxious Weeds and Native Re -seeding o Also of importance to CPW is the revegetation of disturbed soils and the control of noxious weed species through the development of a noxious weed management plan prior to initiating construction activities. • Therefore, CPW recommends that native vegetation be retained on -site during the operational lifespan of the project, both as potential habitat for wildlife and to ensure successful reclamation of the project area, as noxious weeds could spread to adjacent habitats outside of the project area. • Wildlife Escape Ramps o During open pit and open trench mining operations, CPW recommends backfilling escape ramps in areas where steep slopes occur. Escape ramps will allow wildlife to safely exit an open pit or trench if they become entrapped. • Retention ponds o Ponds created by reclamation efforts can hold significant value to wildlife. To maximize the benefit, CPW recommends that ponds be designed to include irregular shorelines and one or more off -shore islands to provide cover, shelter and nesting areas for migratory birds. Islands should be at least 15' x 25' in size for every two surface acres of water in the pond. Shoreline and island slopes should be graded to a ratio of four (4) horizontal feet to every one (1) vertical foot of distance, with some areas having slopes no steeper than eight (8) horizontal feet to every one (1) vertical foot of distance. Such shallow areas will allow for the establishment of a variety of aquatic vegetation and invertebrate prey for waterfowl and shorebirds. Shorelines should be re - vegetated with native aquatic vegetation. In closing, CPW requests from the Weld County Planning Department and Loveland Ready -Mix Concrete Inc. that CPW continue to be involved with this project as it moves through the permitting process. We appreciate being given the opportunity to comment. Please feel free to contact District Wildlife Manager Mike Grooms at 970.692.4028 or via email at michael.grooms@state.co.us should you have any questions or require additional information. Sincerely, Jason Surface Area Wildlife Manager: Area 4 cc: Michael Grooms-DWM, Angelique Curtis -Terrestrial Biologist, Mike Sherman- Conservation Biologist TELESTO 5 O L U T l O N 5• I N C O K P O K A 1' E L7 September 27, 2022 Via Electronic Mail Kim Ogle Weld County Planning Department 1555 North 17th Avenue Greeley, Colorado 80631 Subject: Loveland Ready -Mix USR22-0018 Response to CPW Referral Comments Dear Mr. Ogle: Loveland Ready -Mix Concrete, Inc. (LRM) received the letter dated July 28, 2022 from Jason Surface with Colorado Parks and Wildlife (CPW). This letter serves as LRM's response to CPW's comments and recommendations. Bald Eagle Active Nest Site (1/2 & 1/4 -mile nesting buffer) Comment An active Bald Eagle nest site is a specific location in which a pair of Bald Eagles has attempted to nest within the last five years. Any nest location that can be directly tied to courtship, breeding, or brooding behavior is considered active. CPW has two buffer recommendations to protect these sites: a) a year-round restricted surface occupancy (RSO) 0.25 -mile buffer of any active Bald Eagle nest site, and b) a seasonal (December 1 to July 31) no new human encroachment or permitted/authorized human activities 0.5 -mile buffer of any active bald eagle nest site. Note: The Bald Eagle is designated as an avian Priority Tier 2 Species of Greatest Conservation Need within CPW's 2015 Colorado State Wildlife Action Plan. This designation denotes that these species are in need of conservation attention in Colorado and are provided a relative degree of conservation management priority. CPW has documented an active Bald Eagle nest in Township SN, Range 67W, Section 33 which lies approximately one (1) mile west of the project boundary. While the 1/4 -mile and 1/2 -mile buffers extend outside of the project boundary, CPW recommends that pre - construction nest surveys be conducted by the applicant prior to any surface disturbance or occupancy. If a nest site is found within the project boundary, consultation with CPW is advised. Colorado Office (Corporate) New Mexico Office 750 14th Street SW Loveland, Colorado 80537 970-484-7704 / 970-484-7789 (FAX) 1303 Pope Street Silver City, New Mexico 88061 575-538-5620/575-538-5625 (FAX) To: Kim Ogle Date: September 27, 2022 Page 2 LRM Response CPW's recommendation is noted. LRM does not plan to disturb the nesting habits of raptors with its operations and will consult CPW if a nest site is found within the project boundary. Mule Deer Severe Winter Range Comment Mule Deer Severe Winter Ranges are defined as that part of the overall winter range where 90% of the individuals are located when the annual snowpack is at its maximum and/or temperatures are at a minimum in the two worst winters out of ten. The entire project boundary lies within Mule Deer Severe Winter Range HPH. Therefore, CPW recommends no initial ground disturbances, construction activities or occupancy within the project boundary from December 1 to April 30. LRM Response LRM notes CPW's recommendation and LRM believes little impact to the habitat will occur given that the permitted area is located on existing pastureland that has been actively grazed year -around by cattle for over 20 years. Additionally: • Of the approximately 114 permitted acres, 38 acres will consist of boundary offsets, perimeter buffering, and a 100 -foot buffer corridor along each side of the Big Thompson River. Active mining will be limited to approximate 5 acres phases, thus, limiting disturbance to less than 5% of the permitted mine site at any one time. • Operations will take place Monday through Friday, from 7:00 am to 5:00 pm. Obviously during severe winter weather, construction activities will be at a minimum. • Reclamation will commence concurrently following behind mining providing reclaimed areas for deer range. All reclamation will be carried to completion with all reasonable diligence with a goal to complete each phase within 5 years from the date each cell has been mined through. Additional information regarding the Reclamation Plan can be found in the permit documentation with Colorado Division of Reclamation Mining and Safety, M2021-059. 20220927 CPW TELESTO To: Kim Ogle Date: September 27, 2022 Page 3 Comment Furthermore, CPW recommends using wildlife friendly fencing throughout the development, in particular, along the boundaries that borders the Big Thompson River. Wildlife friendly fencing may include four -strand smooth wire as further discussed in CPW's "Fencing with Wildlife in Mind" brochure. LRM Response CPW's recommendation is noted. LRM plans no fencing along the river at this time. Existing fencing locations can be found in permit documentation with Colorado Division of Reclamation Mining and Safety, M2021-059. Aquatic Native Species Comment There are sensitive aquatic native species (fish and amphibians) located within the Big Thompson River. Therefore, CPW recommends No Surface Occupancy and No Ground Disturbances (year- round) within 500 feet of the Ordinary High water Mark of the Big Thompson River, as well as implementing appropriate storm water BMPs. LRM Response CPW's recommendation is noted. A wetland delineation/determination was conducted on behalf of LRM for the Dunn Pit location. A detailed survey of the present vegetation types, including quantitative estimates of cover and height for the principal species was provided in the Dunn Pit Permit Application M2021-059 Exhibit I, along with an evaluation of the significant wildlife resources in Exhibit H, as approved by the Colorado Division of Reclamation, Mining and Safety (DRMS). A 100' mining buffer from the OHWM on each side of the Big Thompson River will be provided. Other than at the proposed bridge crossing, LRM will stay out of the 100 -foot buffer and only be adjacent to it occasionally for short periods of time. Additionally, upgradient surface water runoff will be intercepted by the mining cells and will be released to the Big Thompson River in a controlled manner, which complies with the requirements of the USR Drainage Requirements. 20220927 CPW TELESTO To: Kim Ogle Date: September 27, 2022 Page 4 Noxious Weeds and Native Re -seeding Comment Also of importance to CPW is the revegetation of disturbed soils and the control of noxious weed species through the development of a noxious weed management plan prior to initiating construction activities. Therefore, CPW recommends that native vegetation be retained on -site during the operational lifespan of the project, both as potential habitat for wildlife and to ensure successful reclamation of the project area, as noxious weeds could spread to adjacent habitats outside of the project area. LRM Response CPW's recommendation is noted. LRM recently provided "Weed Inventory, Monitoring, and Control Plan" to Weld County. LRM plans to mine the site in 5 acre increments and reclamation will take place concurrently as mining progresses, ensuring vegetation and habitat is provided throughout most of the site during the operational lifespan of the project. Wildlife Escape Ramps During open pit and open trench mining operations, CPW recommends backfilling escape ramps in areas where steep slopes occur. Escape ramps will allow wildlife to safely exit an open pit or trench if they become entrapped. LRM Response CPW's recommendation is noted. LRM's approved mining plan requires slopes that are structurally stable at all times. Because it is a wet mining operation, there will be slopes of 2:1 to 3:1 at all times around the entire excavation area. Retention ponds Comment Ponds created by reclamation efforts can hold significant value to wildlife. To maximize the benefit, CPW recommends that ponds be designed to include irregular shorelines and one or more offshore islands to provide cover, shelter and nesting areas for migratory birds. Islands should be at least 15' x 25' in size for every two surface acres of water in the pond. Shoreline and island slopes should be graded to a ratio of four (4) horizontal feet to every one (1) vertical foot of distance, with some areas having slopes no steeper than eight (8) horizontal feet to every one (1) vertical foot of distance. Such shallow areas will allow for the establishment of a variety of aquatic vegetation and invertebrate prey for 20220927 CPW TELESTO To: Kim Ogle Date: September 27, 2022 Page 5 waterfowl and shorebirds. Shorelines should be re -vegetated with native aquatic vegetation. LRM Response CPW's recommendation is noted. Additional information regarding the Reclamation Plan can be found in the permit documentation with Colorado Division of Reclamation Mining and Safety, M2021-059, which includes details on the proposed reclamation ponds. Sincerely, Telesto Solutions, Inc. -2 Taryn Tigges, PE Senior Engineer TMT:wln cc: Stephanie Fancher-English, Loveland Ready -Mix Concrete, Inc. Jason Surface, Colorado Parks and Wildlife 20220927 CPW TELESTO Submit by Email Weld County Referral Y July 12, 2022 The Weld County Department of Planning Services has received the following item for review: Applicant: Loveland Ready -Mix Concrete Inc Case Number: USR22-0018 Please Reply By: August 9, 2022 Planner: Kim Ogle Project: A Site Specific Development Plan and Use by Special Review Permit for Open Mining (sand, gravel and stone) and processing of minerals, employee and equipment associated with operations parking, outside of subdivisions and historic townsites, in the A (Agricultural) Zone District Parcel Number: 105903000027-R4480786 Legal: Part of the NE4 Section 3, T4N, R67W of the 6th P.M., Weld County, Colorado. Parcel Number: 105903000045-R0932101 Legal: Part of the NE4 Section 3, T4N, R67W of the 6th P.M., Weld County, Colorado. Parcel Number: 095734000030-R1639586 Legal: Part of the SE4 Section 34, T5N, R67W of the 6th P.M., Weld County, Colorado. Location: North of and adjacent to County Road 48.5, west of and adjcaent to Highway 257 The application is submitted to you for review and recommendation. Any comments or recommendation you consider relevant to this request would be appreciated. Please reply by the above listed date so that we may give full consideration to your recommendation. Any response not received before or on this date may be deemed to be a positive response to the Department of Planning Services. If you have any further questions regarding the application, please call the Planner associated with the request. Please note that new information may be added to applications under review during the review process. If you desire to examine or obtain this additional information, please call the Department of Planning Services. P P I" We have reviewed the request and find that it does / does not comply with our Comprehensive Plan because: We have reviewed the request and find no conflicts with our interests. See attached letter. Signature �� e�Kaer� Date 8/8/2022 Agency Colorado Division of Water Resourc Weld County Planning Dept. 1555 N. 17th Ave, Greeley, CO 80631 (970)-440-6100 (970)-304-6498 fax SG August 8, 2022 COLORADO Division of Water Resources Department of Natural Resources Kim Ogle Weld County Planning Department Transmission via email: kogle@weldgov.com Re: Dunn Pit (M-2021-059) Case Number USR22-0018 Pt. NE 1/4, Section 3, Twp. 4N, Rng. 67W, 6t" P.M. Water Division 1, Water District 4 Dear Mr. Ogle: We have reviewed the above referenced application for a Site Specific Development Plan and Use by Special Review permit for open mining of sand and gravel. The submitted material does not appear to qualify as a "subdivision" as defined in section 30-28-101(10)(a), C.R.S. Therefore, pursuant to the State Engineer's March 4, 2005 and March 11, 2011 memorandums to county planning directors, this office will only perform a cursory review of the referral information and provide comments regarding the proposed water supply. The comments will not state an opinion on the adequacy of the water supply or the ability of the water supply plan to satisfy any County regulations or requirements, and cannot be used to guarantee the approval of the pending substitute water supply plan or well permit application. The application is in regards to a proposed sand and gravel mining operation known as the Dunn Pit, which will be operated under Colorado Division of Reclamation, Mining and Safety (DRMS) permit no. M-2021-059. The reclaimed land uses upon completion of the mining operation are proposed to be wildlife habitat, groundwater sourced ponds, and mitigated wetlands and open space. Comments regarding the reclamation permit were provided to the DRMS in a memo dated November 16, 2021. The deposit to be mined ranges from approximately 25 to 28 feet thick and is overlain by approximately 1 to 2 feet of sandy to clay loam top soil. An excavator will be used to wet mine material down to the bedrock. The applicant has submitted a request for a substitute water supply plan to this office and an application for a gravel pit well permit. The requested start date of the substitute water supply plan is January 2023, when the applicant expects to have obtained approval of all necessary permits. The consumptive use of groundwater at the site by evaporation, dust control, water retained in the mined product, and reclamation vegetation establishment is estimated to total 21.80 acre-feet during the first year of operation. The applicant has an agreement with the City of Loveland for the supply of replacement water necessary for the operation and approval of the substitute water supply plan. The final reclamation plan includes unlined ponds of exposed groundwater at the site. The ponds will be required to be included in a plan for augmentation decreed by the water court prior to final release of the site from their DRMS permit. I.i'.S 1.:...11:1 ,s,.:-•:". k!::: I i:" ..:.:•iv: t.{1 s[:=0.5 •} ....;.e: (:..i=.?'' hLlps:?'cl.w•.c.:..•:i•<!(1r•-tiro I �� 1•:�c�c.:}. �'c,.r: L.:rta r::' ::�,ri ;. 1}I:•s.. ."•c1 I)r:••: i �:� I'a:i�r C.. �:�r�. �I:r':� •Orrc.t.i .17rt'c i::. • Dunn Pit (M-2021-059) Case No. USR22-0018 August 8, 2022 Page 2 of 2 The applicant proposes to employ two equipment operators and four truck drivers to work the site. A water supply station and portable toilets are proposed to be used for drinking and sanitation purposes. Stormwater will be diverted into the mining cells or allowed to flow through the site using historical channels in undisturbed portions of the site. No additional stormwater detention facilities are proposed. All stormwater runoff intercepted by this operation must infiltrate into the ground or be released to the stream system within 72 hours, otherwise the operator will need to make replacements for evaporation from the surface area of the intercepted stormwater. The applicant has conducted a baseline groundwater assessment to determine support geotechnical analyses, wetland mitigation decisions, and to assess potential impacts associated with the proposed sand and gravel mine. As part of the baseline groundwater assessment the applicant has constructed ten monitoring wells. Water levels will be collected at all monitoring wells monthly and water quality samples will be collected from five of the wells quarterly. Should you or the applicant have any questions regarding this matter, please contact Javier Vargas -Johnson at this office at 303-866-3581 x8227 or via email at javier.vargasjohnson@state.co.us. Sincerely, Sarah Brucker, P.E. Water Resources Engineer Cc: Applicant Referral file no. 30419 From: Salamack, Kristin A <kristin_salamack@fws.gov> Sent: Tuesday, August 23, 2022 4:25 PM To: Kim Ogle <kogle@weldgov.com> Subject: Planning Use by Special Review case #USR22-0018 Caution: This email originated from outside of Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hello Kim Ogle, I work with the U.S. Fish and Wildlife Service Colorado Field Office and received materials for review associated with the Loveland Ready -Mix open mining site on July 12, 2022. My apologies for the delay in reaching out with questions — our office is currently understaffed and reviews have taken longer than usual. I had some questions and concerns about this development regarding potential habitat for the federally threatened Preble's meadow jumping mouse. Are you the best person to discuss these questions with or is there someone on the planning/design side for Loveland Ready Mix to whom I should direct my questions? Thanks, Kristin Salamack (she/her/hers) CDOT/USFWS Liaison Colorado Ecological Services Field Office 134 Union Blvd, Lakewood, CO 80228 Office: 303/236-4748 I I Mobile: 518/441-2827 COLORADO Department of Transportation tikviskol of Transportation Devetoprnent Hello