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Home My WebLink About20153481.tiff MEMORANDUM IMt,I r, I/ Fr --I I TO: Chris Gathman, Planning Services DATE: 8/12/15 mei L , FROM: Wayne Howard, P.E., Development Engineer CO - N—Y SUBJECT: USR15-0038 Timbro/Wells Trucking/Gravel Pit The Weld County Department of Planning Services-Engineering has reviewed this proposal. 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: The project proposes to mine a ridge located on the Timbro Ranch for its gravel resources. This project is west of CR 119 and is north of CR 106. Parcel number 046910000004 Access is from CR 119. Roads: County Road 119 is a gravel road and is designated on the Weld County Road Classification Plan as a collector road, which requires 80 feet of right-of-way at full buildout. All setbacks shall be measured from the edge of future right-of-way. This road is maintained by Weld County. The County Road 106 Section Line is estimated to have 30 feet of unmaintained County line right-of-way on the south side of the section line. If the existing access roadway utilizes the road ROW on the south side of the section line, the applicant would be required to enter into a non-exclusive license agreement. Traffic: Latest ADT on CR 119 was taken on 12/10/14 which counted 826 vpd with 54%trucks. A traffic narrative was submitted with the application materials and indicated that there will be approximately 160 daily roundtrips with 150 being trucks. The expected traffic routes are CR 119 north to CR 110 and south to CR 104 and distribution of traffic is estimated to be 50/50 either direction. Access: An Access Permit application was submitted with the application materials. Public Works will review the application and provide an access permit and permit number if approved. Questions concerning access requirements can be directed to Public Works access permit division. For shared accesses, Public Works strongly recommends that the property owner establish an access road maintenance agreement so future owners of the properties will be aware of their requirements for shared maintenance of the access road. This is not a requirement for the recorded exemption but is recommended to avoid property owner conflicts in the future. Entrance gates (if applicable) must be set back a minimum of 100 feet from edge of shoulder to allow a truck with trailer or RV to pull completely off of the roadway and open the gate. In no case shall any vehicle(s) stopped to open a gate be allowed to create a safety issue for roadway users. Gates are not allowed on section line right of way. TRACKING CONTROL: Tracking control is required to prevent tracking from the site onto public roadways. Minimal standards are listed below. Temporary Tracking Control shall be used during construction unless permanent tracking control is installed ahead of construction activities. More than 10 round truck trips/day(tandem or semi-trucks)or more than 50 round passenger vehicles trips: L Access onto gravel roads requires a tracking control device and a minimum of 300ft of recycled asphalt or road base. "Recycled concrete is not allowed in County ROW **Tracking control devices can be double cattle guards or other specialized device **" Tracking control for unmaintained public ROW is required just prior to entering publically maintained roadways. A development standard will be included on the recorded site plan. "The site shall be maintained to mitigate any impacts to the public road including damages and/or offsite tracking." A variance request for alternatives to the above tracking control can be submitted to the Traffic Division of Public Works for review and consideration. Improvements and Road Maintenance Agreement: An Improvements Agreement between the Applicant and the County will be required for this project. It will detail the approved haul route(s), outline when offsite improvements will be triggered, and include a maintenance agreement for the haul routes. Improvements/Road Maintenance Agreement: An example agreement is available at: http://www.co.weld.co.us/Departments/PlanningZoninq/LandUseApplicationsAssistance/ApplicationAs sistance.html An Improvements Agreement is required for sites with required offsite improvements. Collateral is required to ensure the improvements are made. Road Maintenance is typically included as a section of the Improvements Agreement when the County feels that the site activities may impact the County roadways. Possible mitigations included in the road maintenance agreement may include but are not limited to: dust control, specified haul routes, damage repairs, and future improvement triggers. Drainage Requirements: The drainage code is currently going through changes with the Board of County Commissioners.As of July 13th the draft code is to be used in a pilot program mode until August 17th when finalized. Gravel pits are except from detention ponds requirements as the stormwater drains back into the excavated site. This is true in the past code as well as the new code changes. The proposed gravel pit will excavate a ridge or bluff and not be digging a hole as typically done. As a result, the stormwater will not be draining into the excavated hole, but will runoff the excavated site. The applicant began the process during the recent drainage code changes. The applicant has supplied a drainage narrative stating the developed site is less than 10% overall site imperviousness which meets the previous drainage detention waiver. Engineering has agreed to allow the use of this drainage detention waiver during this drainage code transition period. The applicant has supplied a drainage narrative which is acceptable to engineering and the detention requirements have been waived. This site is not in a defined Municipal Separate Storm Sewer System (MS4)area which is a more urbanized area with state mandated, higher water quality requirements Grading Permit A Weld County Grading Permit will be required if disturbing more than 1 acre. Typically gravel pits are only required a grading permit for disturbance over 1 acre for parking lots, etc, but due to the natural of mining this site is not the typical and the site is required to apply for a permit. 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 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 a Engineering representative from the Planning Department for more information. 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, Rik Gay, 303-692- 3575. Geologic Hazard Area: This area IS NOT in a Geologic Hazard Area. Floodplain: This area IS NOT in a FEMA regulatory floodplain. CONDITIONS OF APPROVAL: A. An Improvements and Road Maintenance Agreement is required for offsite improvements at this location. Road maintenance including dust control, damage repair, specified haul routes and future traffic triggers for improvements will be included. (Department of Public Works) B. The plan shall be amended to delineate the following: 1. Show and label the approved access(es) (APXX-XXXXX), and turning radii on the site plan. (Department of Public Works) 2. Show and label the approved tracking control on the site plan. Prior to Construction: A. The approved access and tracking control shall be constructed prior to on-site construction. (Planning- Engineering) B. If more than one (1)acre is to be disturbed, a Weld County Grading Permit will be required. (Planning- Engineering) DEVELOPMENT STANDARDS (NOTES ON THE SITE PLAN) 1. Should noxious weeds exist on the property or become established as a result of the proposed development, the applicant/landowner shall be responsible for controlling the noxious weeds, pursuant to Chapter 15, Articles I and II, of the Weld County Code. (Planning-Engineering) 2. The site shall be maintained to mitigate any impacts to the public road including damages and/or offsite tracking. (Planning and Engineering) 3. There shall be no parking or staging of vehicles on public roads. On-site parking shall be utilized. (Department of Public Works) 4. The historical flow patterns and runoff amounts will be maintained on the site. (Planning-Engineering) MEMORANDUM LITE _ TO: Chris Gathman, Planning Services 14 \ FROM: Lauren Light, Environmental Health SUBJECT: USR15-0038 Timbro Ranch U2— 0U NTT DATE: 10/23/2015 Environmental Health Services has reviewed this proposal for a Site Specific Development Plan and Use by Special Review Permit for mining or recovery of other mineral deposits and materials processing (gravel mining) in the A (Agricultural) Zone District. As this is a temporary use, portable toilets and bottled water are acceptable for sanitary uses. Noise will be restricted to the level allowed in the industrial zone district. The State does not require registration of aboveground fuel storage tanks associated with gravel pits as long as the following requirement is adhered to: "Aboveground storage tanks used to store flammable and combustible liquids at mining facilities and construction and earthmoving projects, including gravel pits, quarries, and borrow pits where, in the opinion of the state inspector of oils, tight control by the owner or contractor and isolation from other structures make it unnecessary to meet the requirements of this article." We have no objections to the proposal; however, we recommend 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. The facility shall comply with the Air Pollution Emission Notice (A.P.E.N.) permit requirements as stipulated by the Air Pollution Control Division, Colorado Department of Public Health and Environment, as applicable. 5. Fugitive dust should attempt to be confined on the property. Uses on the property should comply with the Colorado Air Quality Commission's air quality regulations. 6. This facility shall adhere to the maximum permissible noise levels allowed in the Industrial Zone as delineated in Section 14-9-30 of the Weld County Code. 7. Adequate drinking, handwashing and toilet facilities shall be provided for employees and patrons of the facility, at all times. Portable toilets and bottled water are acceptable. 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 and shall contain hand sanitizers. 8. The operation shall comply with all applicable rules and regulations of the State and Federal agencies and the Weld County Code. 2 DNR Division O of OR A D O Resources Co ofv,,u noSor.r,.es 1313 Sherman Street, Room 821 Denver. CO 80203 August 4, 2015 Chris Gathman Weld County Department of Planning Services Transmission via email: cgathman@co.wetd.co.us Re: Timmerman/Wells Pit, Case No. USR15-0038 Section 10, T9N, R59W, 6th P.M. Water Division 1, Water District 64 Dear Mr. Gathman: We have reviewed the above referenced proposal for a site-specific development plan and use by special review for gravel mining. The submitted material does not appear to qualify as a "subdivision" as defined in C.R.S. § 30-28-101(10)(a). Therefore, pursuant to the State Engineer's March 4, 2005 memorandum to county planning directors, this office will only perform a cursory review of the referral information and provide comments. The comments will not address the adequacy of the water supply plan for this property or the ability of the water supply plan to satisfy any County regulations or requirements. The proposed gravel mining operation, known as the Timmerman/Wells Pit, will be operated under Colorado Division of Reclamation Mining and Safety (DRMS) permit no. M- 2015-005. The mining operation will be located on 106.4 permitted acres northeast of Keota. The primary commodity to be mined at the site is gravel for road base. The site is proposed to be reclaimed to its current use of rangeland upon completion of the mining operation. Comments regarding the reclamation permit were provided to the DRMS in a memo dated March 9, 2015. No groundwater is anticipated to be encountered at the Timmerman/Well Pit; therefore exposure of ground water must not occur during or after mining operations. The operation is anticipated to have approximately six employees on site, with additional visits by material haul truck drivers and other site users. Bottled drinking water will be provided for employees and visitors, and portable toilets will be located on site. Water for non-potable purposes, such as dust suppression, will be supplied by an existing well located near the site, permit no. 77932-F. Well permit no. 77932-F allows the use of up to an average annual amount of 300 acre- feet of water from the well for stock watering, industrial, oil and gas development, and irrigation purposes. The well is included in the Timbro Ranch Cattle Company, LLC substitute water supply plan which is currently valid through January 31, 2016. The well must be operated in accordance with all of its permitted terms and conditions, including that the well be included in a valid substitute water supply plan or a permanent plan for augmentation. 1313 Sherman Street, Room 821, Denver, CO 80203 P 303.866.3581 F 303.866.3585 www.water.state.co.us i'"/a-to +� Timmerman/Wells Pit Page 2 of 2 Case No. USR15-0038 August 4, 2015 A detention pond is to be added to the southern end of the site. Any storm water runoff intercepted by this operation that is not diverted or captured in priority must infiltrate into the ground or be released to the stream system within 72 hours; otherwise a substitute water supply plan or augmentation plan approved by water court must be obtained for the pond. Please contact Sarah Brucker of this office if you or the applicant have any questions. Sincerely, � ' • Tracy L. Kofloff, P.E. Water Resource Engineer `.oF-c<ii k 1313 Sherman Street, Room 821, Denver, CO 80203 P 303.866.3581 F 303.866.3585 www.water.state.co.us i" 10 • 1H Hello