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Home My WebLink About20091705.tiffWeld County Planning Department GREELEY OFFICE vit'ffipm WIWDc. COLORADO MEMORANDUM ,"'"' 3�'RN RECENED TO: Kim Ogle, Planning Services DATE: June 29, 2009 FROM: Don Dunker, P.E., Public Works 1L24 SUBJECT: USR-1676, Vestas, June 19, 2009 comments responses The Weld County Public Works Department has reviewed this proposal; this project falls primarily under the purview of the Use by Special Review Standards, Weld County Code, Chapter 23, Article II, Division 4, Section 23. Our comments and requirements are as follows: REQUIREMENTS: 1. Prior to recording the plat: A. The applicant shall submit a detailed sign plan in compliance with Chapter 23 Division 2 of the Weld County Code to the Weld County Department of Planning Services for review and approval. A copy was submitted by Notle and Associates, June 19, 2009 please address the following comments. Include stop bars for all stop signs shown on the plans. The drawings shall be stamped, signed and dated by a Professional Engineer able to practice within the State of Colorado. F. The applicant shall address and resolve the requirements (concerns) of the Weld County Department of Public Works, as stated in the referral response dated October 29, 2008, including but not limited to a transferable Long -Term Maintenance and Improvements Agreement. Evidence of such shall be submitted in writing to the Weld County Department of Planning Services. This is in process and will need to be completed. P. The applicant shall contact the Colorado Department of Transportation to verify the access permit or for any additional requirements that may be needed to obtain or upgrade a current permit. Evidence of approval shall be submitted to the Department of Planning Services. The response received from Gloria Hice- Idler on Wednesday June 10, 2009 states, "They actually have new permits for CR-4 and CR-6, however no notice to proceed. I now have those plans, but realize that they have not complied with one of our requirements which is to notify all impacted owners by certified mail. I advised them to that a couple of days ago. I'm sill waiting." Public Works will also require the applicant to provide contours on the storm water drainage basin maps. DD. The applicant shall provide three (3) complete set of construction... This will be on going until completed. pc: pc and email: USR-1676 Kim Ogle, Planning Services 2009-1705 M:\PLANNING — DEVELOPMENT REVIEW\USR-Use by Special Review\USR-1676 Vestas\Final letter to Nolte - 061109\USR-1676-061909-reveiw comments -1.DOC p� /%4 1(5R , 7X Weld County Planning Department GREELEY OFFICE WICYc COLORADO APR 2 271111P MEMORANDUM RECEIVED TO: Kim Ogle, Planning Services DATE: April 21, 2009 FROM: Don Dunker, P.E., Public Works SUBJECT: USR-1676, Vestas Wind Systems A/S The Weld County Public Works Department has reviewed this proposal; this project falls primarily under the purview of the Use by Special Review Standards, Weld County Code, Chapter 23, Article II, Division 4, Section 23. Our comments and requirements are as follows: COMMENTS: Weld County Public Works received a review set of drawings for County Road 27.3 improvements to the south access off CR-4 into the Vestas Wind Systems A/S project site April 14, 2009. It was prepared by Nolte Associates, Inc., the drawings first sheet was stamped, signed and dated by a Colorado registered Engineer, Rick Rome PE 35103, the remainder of the sheets were not stamped, signed and dated. REQUIREMENTS for Development Site South Access Road Improvements: Sheet CV02 Construction Note: A. Include Weld County Public Works at the preconstruction meeting. C. Notify Weld County Public Works also 48 hours prior to starting work. G. Include Weld County Pubic Works Department within this note. H. Include Weld County Pubic Works Department within this note. I. Include Weld County within this note. O. Add the County to this note: All work within a Weld County right of way will require a Weld County representative to have the final decision concerning the roadway in the event of conflicting instructions. Warrantee of work: Add the following to the end of the note: Weld County Bond shall refer to the Weld County offsite improvements agreement. Traffic Control: Add Weld County to the first five notes. Add the following note after the last Traffic Control note: The Contractor shall not close any County roadway or portion of a County roadway without requesting a right of way permit form the Weld County Public Works Department. If Board of County Commissioner approval is required allow a minimum of seven working days written notice. Paving notes: Include testing notes for compaction and asphalt installation. Include notes as to how County Residents will be accommodated for access, water supply, school bus service, mail service and emergency service. Provide notification in writing to all County Residents one week prior to service interruption and a second written notice 24 -hours before service interruption. As- Built drawings shall be provided to the City of Brighton and Weld County. Include a legend for all line types and symbols throughout the plan set. Sheet RD01, RD02, RD03: Label and show the west side roadside ditch flow line. What do the large arrows indicate in the plan view east and west of the roadway? At Station 22+37.50 is a culvert required? How will east side flows cross the new roadway? /A RT r w Sheet SD01: Label and dimension the existing drive to the east. What will separate the two driveways as they are very close to one another? For ease of construction please include a toe wall detail, rip rap pad detail, headwall detail, with concrete strengths and rebar size and placement. SI01: Label all arrows pointing to signs. Clearly show and label the stop sign and stop bar. Clearly indicate and show the striping being proposed on this new roadway. SX02: Show the 18" Class V, RCP culvert at station 29+00. Please provide three complete sets of construction drawings. The drawings must be signed, dated, and stamped by a professional engineer licensed to practice in the State of Colorado. Prior to submitting three complete sets, a complete set can be submitted for review. pc: USR-1676 pc: Applicant's Engineer — Nolte Associates, Inc. — 8000 S. Chester Street, Suite 200 — Centennial, Colorado 80112 email: Kim Ogle, Planning Services M:\PLANNING — DEVELOPMENT REVIEW\USR-Use by Special Review\USR-1676, Vestas\USR-1676-South access roadway plans -042109. DOC _2_ a #0 WUDc. COLORADO MEMORANDUM Wefd County Planning Departmen GREELEY OFFICE MAR 24 7nna RECEIVED TO: Kim Ogle, Planning Services DATE: March 23, 2009 FROM: Don Dunker, P.E., Public WorksdlL.V SUBJECT: USR-1676, Vestas Wind Systems A/S The Weld County Public Works Department has reviewed this proposal; this project falls primarily under the purview of the Use by Special Review Standards, Weld County Code, Chapter 23, Article II, Division 4, Section 23. Our comments and requirements are as follows: 1. GENERAL REQUIREMENTS: Weld County Public Works Department did not receive plans for final onsite roadway plan, profile and detail drawings, preliminary or final CR-4 roadway plan, profile and detail drawings, preliminary or final CR-6 roadway plan, profile and detail drawings, preliminary or final CR-27 roadway plan, profile and detail drawings. These drawings still need to be submitted for review per USR-1676. COMMENTS: Weld County Public Works received a final set of drawings for Sanitary Sewer Improvements within CR-27 and CR-6 for the Vestas Wind Systems A/S project March 6, 2009 located at CR-27 and CR-6. It was prepared by Nolte Associates, Inc., the drawings were not stamped, signed and dated by a Colorado registered Engineer. 2. REQUIREMENTS for Sanitary Sewer Improvements within CR-27 and CR-6: Sheet CV02 Construction Notes: G. Add the 'and County's' text to the second sentence after "The City's (add the and County's) approval ... Sheet UT01 and UT02: Add 'and Businesses' after "...residential homes..." in Note 2. FM01: From station 10+00 to 18+00 the force main is outside the right of way is it within an easement? Please show this easement on the plans. Has the property owner of the mailboxes to be relocated been notified? Please include the owner of the mailbox address next to each mailbox to be relocated for clarity. Add the following note to all sheets: Weld County shall not be liable for the maintenance of any sanitary sewer lines or facilities. FM04: Will there be any fire hydrants on the west side of CR-27? Please show them within the profile view. Include Weld County on all compaction notes on all applicable sheets. Please include a note on the plans stating that all compaction notes are within the Roadway Plans. FM07: At station 104+00 show this area in a separate detail. Please label the property boundary. COMMENTS: Weld County Public Works received a Final set of drawings for onsite Water Line Improvements within the Vestas Wind Systems A/S project February 27, 2009 located at CR-27 and CR-6. It was prepared by Nolte Associates, Inc., the drawings were stamped, signed and dated by a Colorado registered Engineer P.E. number 35103. 3. REQUIREMENTS for onsite Water Line Improvements: Sheet CV02 Construction Notes: G. Add the 'and County's' text to the second sentence after "The City's (add the and County's) approval WT01: The profile views on all sheets have areas that are not readable, please correct. WT14: At station 12+27.5 the shown sanitary sewer is not within the profile view grid. COMMENTS: Weld County Public Works received a Final set of drawings for onsite Sanitary Sewer Improvements within the Vestas Wind Systems A/S project February 27, 2009 located at CR-27 and CR-6. It was prepared by Nolte Associates, Inc., the drawings were stamped, signed and dated by a Colorado registered Engineer P.E. number 35103. 4. REQUIREMENTS for onsite Sanitary Sewer Improvements: Sheet CV02 Construction Notes: G. Add the 'and County's' text to the second sentence after "The City's (add the and County's) approval COMMENTS: Weld County Public Works received a Final Drainage Report for the Vestas Wind Systems A/S project February 27, 2009 located at CR-27 and CR-6. It was prepared by Nolte Associates, Inc., Rick Rome, Registered Professional Engineer State of Colorado, stamp number 35103. The report was stamped, signed, and dated. 5. REQUIREMENTS Final Drainage Report: A statement needs to be added to the narrative stating that the Vestas project is slated to be annexed by the City of Brighton and future development on the site will be reviewed and approved by City staff. Note that the retention ponds may need to be expanded due to future development on the site. Please provide certification stating that the overtopping of WCR 6 meets Weld County's criteria for no more than 6 inches of water over the road during the 10 -year event. Appendix F, Storm Sewer Calculations appears to have been left out of the copies of the Final Drainage Report that was submitted on February 27, 2009. Because Appendix F is not included, it is not clear if the comments were adequately addressed. Please ensure that all copies of the Final Drainage Report submitted to Weld County contain complete information. Sheets DR03 and DR04 appear to be showing Type L riprap at several of the storm drains running along WCR 6. Please note that the Urban Storm Drainage Criteria Manual requires Type L and M riprap to be buried. Please provide information on the drawings showing that at least the Type L riprap will be buried. For all locations where riprap will be installed, please show the type of filter bedding that will be used. -2- COMMENTS: Weld County Public Works received a Final set of drawings for Storm Drain Plans within the Vestas Wind Systems A/S project February 27, 2009 located at CR-27 and CR-6. It was prepared by Nolte Associates, Inc., the drawings were stamped, signed and dated by a Colorado registered Engineer P.E. number 35103. 6. REQUIREMENTS for Storm Drain Plans: Sheet CV02 Construction Notes: G. Add the 'and County's' text to the second sentence after "The City's (add the and County's) approval ..." PD01: Label the South Retention Pond emergency spillway, include riprap to protect pond bank. SD01: Note 4 on each sheet please replace with the following, 'Weld County shall not be liable for the maintenance of any storm drain facilities.' SD02 - SD03a: Show the 100-yr HGL line in all pipe or culvert profile views. Please make sure arrow points to the HGL line. Show the 100-yr HGL line within the culverts and short sections of pipe profile view on all sheets. It was noticed that the storm drainpipe being proposed is class IV and V in some areas and there is only 1.5' of cover over a waterline or sewer line under these pipes. With these anticipated heavy loads will the waterline and sewer line crush over time? SD06: SD MH 108B it appears that a bolt down lid is required since the 100-yr HGL line is above the lid elevation. SD11: Station 11+63.87 the profile view calls out for concrete base beams see sheet DT02 for detail, there is no concrete base beam detail on any of the detail sheets. SD12: 100-yr HGL is not pointing to correct line. DT01: Please provide a specification sheet for the 18R Snout oil/debris stop with the next submittal. -3- COMMENTS: Weld County Public Works received a set of drawings for Railroad Crossings at CR-4 and CR-6 Plans adjacent to the Vestas Wind Systems A/S project March 5, 2009 located at CR-27 and CR-6 and CR-4. It was prepared by Nolte Associates, Inc., the drawings were not stamped, signed and dated by a Colorado registered Engineer. 7. REQUIREMENTS for Railroad Crossing Plans: CR01 and CR02: Include a note to state that; Weld County is not responsible for any maintenance of any right of way.' Please include elevations for all crossing utilities. Show size and material for all pipes. Include all utilities being crossed by the railroad crossing within the profile view, note the pipe crossings are missing at stations 221+60 and 221+70. Provide station beginning and ending for all roadway striping. Include a legend. Please provide three complete sets of construction drawings. The drawings must be signed, dated, and stamped by a professional engineer licensed to practice in the State of Colorado. Prior to submitting three complete sets, a complete set can be submitted for review. pc: pc: email: USR-1676 Applicants Engineer — Nolte Associates, Inc. — 8000 S. Chester Street, Suite 200 — Centennial, Colorado 80112 Kim Ogle, Planning Services facility within railroad water and sewer line M:\PLANNING — DEVELOPMENT REVIEW\USR-Use by Special Review\USR-1676, Vestas\USR-1676-SScr27&cr6-SSonsite-waterlinesonsite-onsite roasways- Drainage reoprt-032309_2-Final.DOC -4- Weld County Planning Department GREELEY OFFICE 0itz WIWDc. COLORADO FFf1 ; (t7Rl1r MEMORANDUM RECEWED TO: Kim Ogle, Planning Services DATE: February 19, 2009 FROM: Don Dunker, P.E., Public Works SUBJECT: USR-1676, Vestas Wind Systems A/S The Weld County Public Works Department has reviewed this proposal; this project falls primarily under the purview of the Use by Special Review Standards, Weld County Code, Chapter 23, Article II, Division 4, Section 23. Our comments and requirements are as follows: COMMENTS: Weld County Public Works received a bid set of drawings for Sanitary Sewer Improvements within CR-27 and CR-6 for the Vestas Wind Systems A/S project January 30, 2009 located at CR-27 and CR-6. It was prepared by Nolte Associates, Inc., the drawing were not stamped, signed and dated by a Colorado registered Engineer. REQUIREMENTS for Sanitary Sewer Improvements within CR-27 and CR-6: Sheet CV02 Construction Note: A. Include Weld County Public Works at the preconstruction meeting. D. Notify Weld County Public Works also 48 hours prior to starting work. Add the following note after note D: A right of way permit will be required to be obtained from Weld County Pubic Works, contact Amy Burry at (970) 304-6496. All work being done within a Weld County right of way shall require a Traffic Control Plan acceptable to Public Works and may require Weld County Board of County Commissioners permission. G. Include Weld County Pubic Works Department within this note. I. Include Weld County within this note. Add the following note after note K: All right of way work shall be accepted by a Weld County Pubic Works inspector. Contact Josh Holbrook at (970) 301-2622. When inspectors are required to work overtime it shall be at the Contractors expense, provided however, such inspectors shall remain employees of the County of all purposes. 48 hours notice shall be required for requesting any inspection in service outside of normal business hours. Payment of such overtime shall be made by check to Weld County Department of Pubic Works prior to Final Acceptance. N. Add the County to this note: All work within a Weld County right of way will require a Weld County representative to have the final decision concerning the roadway in the event of conflicting instructions. Warrantee of work: Add the follow to the end of the note: Weld County Bond shall refer to the Weld County offsite improvements agreement. Traffic Control: Add Weld County to the first five notes. Add the following note: The Contractor shall not close any County roadway or portion of a County roadway without requesting a right of way permit form the Weld County Public Works Department. If Board of County Commissioner approval is required allow a minimum of seven working days written notice. Include testing notes for compaction and asphalt removal and installation. Show notes for acceptable Geotechnical report requirements. Include notes as to how County Residents will be accommodated for access, water supply, school bus service, mail service and emergency service. Provide notification in writing to all County Residents one week prior to service interruption and a second written notice 24 -hours before service interruption. As- Built drawing shall be provided to the City of Brighton and Weld County. Sheet UT01 and UT02: Label all properties with the property owner name and address. Label all County right of ways. Label all edge of asphalt. Indicate phasing. FM01: The profile views on all sheets have areas that are not readable, please correct. From station 10+00 to 18+00 the force main is outside the right of way is it within an easement? Have the adjacent property owners been contacted? and compensated for the use of their property? Specify who owns the right of way on all plans. Label the edge of pavement on all sheets. Has the property owner of the mailboxes to be relocated been notified? Add the following note to all sheets: Weld County shall not be liable for the maintenance of any sanitary sewer lines. FM02: Is there enough area along the sanitary sewer for future maintenance? Show all utilities that the sanitary sewer is crossing within the profile view. Include an elevation for all crossing utilities within the profile view. FM03: Show the property boundary on each side of CR-27 on all sheets. Show a detail for each driveway to be removed and reinstalled. Include a culvert at each driveway minimum County requirement is 15" CMP use a larger size if required. Label the detail with the drive's address. Include T.O.P. within the legend. FM04: Will there be any fire hydrants on the west side of CR-27? Include Weld County on all compaction notes on all applicable sheets. FMO5: Include the hatched area within the legend. If the cleanout structure is within the right of way all components shall be HS -20 load rated. FM06: Per the 30" HDPE Casing Pipe detail: What happened to the 16" C900 pipe that the profile view shows? What does DIPS indicate? How will water hammer be controlled with no saddles holding the force main pipe? Show thrust blocks in profile view. Show all pothole information on all sheets. FM07: At station 104+00 show this area in a separate detail. FM08: At about station 115+00 show the cleanout as shown in the plan view. Label the Fulton Ditch on all applicable sheets. SS01: Include a Railroad signature block on the sheets requiring the railroad to be crossed. Include pipe strength and wall thickness for casing under railroad. Label access of CR-6. Show a detail of railroad casing crossing. Label right of way section. -2- DT01: Same comments as on Sheet FM06 for the 30" HDPE Casing Pipe detail. Include an encasement detail for the sanitary sewer line. Include a lowering detail. Show a thrust block detail. Should a storm line cross a sanitary sewer line concrete saddles shall be used on either side of the sanitary sewer line to carry the storm line weight. Please address all the reline comments within the Sanitary Sewer improvements for CR-27 and CR-6 plan set. Return the redlines upon resubmittal. COMMENTS: Weld County Public Works received a preliminary set of drawings for onsite Water Line Improvements within the Vestas Wind Systems A/S project January 30, 2009 located at CR-27 and CR-6. It was prepared by Nolte Associates, Inc., the drawing were not stamped, signed and dated by a Colorado registered Engineer. REQUIREMENTS for onsite Water Line Improvements: Sheet CV02 Construction Note: A. Include Weld County Public Works at the preconstruction meeting. D. Notify Weld County Public Works also 48 hours prior to starting work. Add the following note after note D: A right of way permit will be required to be obtained from Weld County Pubic Works, contact Amy Burry at (970) 304-6496. All work being done within a Weld County right of way shall require a Traffic Control Plan acceptable to Public Works and may require Weld County Board of County Commissioners permission. G. Include Weld County Pubic Works Department within this note. I. Include Weld County within this note. Add the following note after note K: All right of way work shall be accepted by a Weld County Pubic Works inspector. Contact Josh Holbrook at (970) 301-2622. When inspectors are required to work overtime it shall be at the Contractors expense, provided however, such inspectors shall remain employees of the County of all purposes. 48 hours notice shall be required for requesting any inspection in service outside of normal business hours. Payment of such overtime shall be made by check to Weld County Department of Pubic Works prior to Final Acceptance. N. Add the County to this note: All work within a Weld County right of way will require a Weld County representative to have the final decision concerning the roadway in the event of conflicting instructions. Warrantee of work: Add the follow to the end of the note: Weld County Bond shall refer to the Weld County improvements agreement. Traffic Control: Add Weld County to the first five notes. Add the following note: The Contractor shall not close any County roadway or portion of a County roadway without requesting a right of way permit form the Weld County Public Works Department. If Board of County Commissioner approval is required allow a minimum of seven working days written notice. Include testing notes for compaction. Show notes for acceptable Geotechnical report requirements. Include notes as to how County Residents will be accommodated for access, water supply, school bus service, mail service and emergency service. As- Built drawing shall be provided to the City of Brighton and Weld County. -3- WT01: The profile views on all sheets have areas that are not readable, please correct. The vertical deflections are not shown within the plan view. Show all utility crossing within the profile view. Label the street name on all sheets. Add note 3 under the Notes section on each sheet: Weld County shall not be liable for the maintenance of any waterlines. WT02: Show the storm line within all Utility Sections. Include an elevation for all utilities crossed by the waterline. Label the street. WT03: Put the T.B. designation into the legend on all sheets. Show all utilities crossed by the waterline in the profile view. WT05: Will the sanitary sewer line be concrete encased at all waterline lowerings below the sanitary sewer line? Show all utility crossing within the profile view. WT06: At station 75+00 where does this 12" pipe tie into, it is not shown within the plan view. Show all utility crossing within the profile view. Include an elevation for all utilities crossed by the waterline. WT07: Show all utility crossing within the profile view. Include an elevation for all utilities crossed by the waterline. WT08: Show all utility crossing within the profile view. Include an elevation for all utilities crossed by the waterline. WT09: Show all utilities crossed by the waterline in the profile view. WT10: Show all utilities crossed by the waterline in the profile view. Will the sanitary sewer line be concrete encased at all waterline lowerings below the sanitary sewer line? WT11: Show all utility crossing within the profile view. Include an elevation for all utilities crossed by the waterline. WT12: Include an elevation for all utilities crossed by the waterline. WT13: Show all utility crossing within the profile view. Include an elevation for all utilities crossed by the waterline. Dimension the distance between the bottom of the waterline and top of the sanitary sewer line. WT14: Include an elevation for all utilities crossed by the waterline. Dimension the distance between the bottom of the waterline and top of the sanitary sewer line. Dimension the distance between the bottom of the gas line and top of the waterline. Label the roadway on all sheets. WT15: Include an elevation for all utilities crossed by the waterline. DT02: Where is the inlet concrete apron being used within this set of plans? Include a sanitary sewer concrete encasement detail. -4- Please address all the reline comments within the Sanitary Sewer improvements for CR-27 and CR-6 plan set. Return the redlines upon resubmittal. COMMENTS: Weld County Public Works received a preliminary set of drawings for onsite Sanitary Sewer Improvements within the Vestas Wind Systems NS project January 30, 2009 located at CR-27 and CR-6. It was prepared by Nolte Associates, Inc., the drawing were not stamped, signed and dated by a Colorado registered Engineer. REQUIREMENTS for onsite Sanitary Sewer Improvements: Sheet CV02 Construction Note: A. Include Weld County Public Works at the preconstruction meeting. D. Notify Weld County Public Works also 48 hours prior to starting work. Add the following note after note D: A right of way permit will be required to be obtained from Weld County Pubic Works, contact Amy Burry at (970) 304-6496. All work being done within a Weld County right of way shall require a Traffic Control Plan acceptable to Public Works and may require Weld County Board of County Commissioners permission. G. Include Weld County Pubic Works Department within this note. I. Include Weld County within this note. Add the following note after note K: All right of way work shall be accepted by a Weld County Pubic Works inspector. Contact Josh Holbrook at (970) 301-2622. When inspectors are required to work overtime it shall be at the Contractors expense, provided however, such inspectors shall remain employees of the County of all purposes. 48 hours notice shall be required for requesting any inspection in service outside of normal business hours. Payment of such overtime shall be made by check to Weld County Department of Pubic Works prior to Final Acceptance. N. Add the County to this note: All work within a Weld County right of way will require a Weld County representative to have the final decision concerning the roadway in the event of conflicting instructions. Warrantee of work: Add the follow to the end of the note: Weld County Bond shall refer to the Weld County improvements agreement. Traffic Control: Add Weld County to the first five notes. Add the following note: The Contractor shall not close any County roadway or portion of a County roadway without requesting a right of way permit form the Weld County Public Works Department. If Board of County Commissioner approval is required allow a minimum of seven working days written notice. Include testing notes for compaction. Show notes for acceptable Geotechnical report requirements. Include notes as to how County Residents will be accommodated for access, water supply, school bus service, mail service and emergency service. Add a note: Weld County shall not be liable for the maintenance of any sanitary sewer. Include sanitary sewer test notes. As- Built drawing shall be provided to the City of Brighton and Weld County. SS01: The profile views on all sheets have areas that are not readable, please correct. It is common engineering practice to have the sanitary sewer line be concrete encased wither side of the waterline lowerings below the sanitary sewer line or if there is less than 18" clearance between the pipes and where storm water lines have less than 18" clearance. Please provide a detail and show in the profile view of all affected pipes. Show the building sanitary sewer connections in a profile view include the utilities being crossed. -5- Show all utility crossing within the profile view. Add note 3 under the Notes section on each sheet: Weld County shall not be liable for the maintenance of any sanitary sewer lines. SS02: Show all utility crossing within the profile view. Include an elevation for all utilities crossed by the sanitary sewer line. Indicate a Stub detail; include the detail on the detail sheets. SS03: Show all utility crossing within the profile view. Include an elevation for all utilities crossed by the sanitary sewer line. Show the building sanitary sewer connections in a profile view include the utilities being crossed. Show the storm water line in all section views on all sheets. Show and provide a drop manhole detail, label the drop manholes in the plan and profile views. Will the sanitary sewer crossing the fire hydrant pipe at station 45+08.92 require concrete encasement? Will the sanitary sewer crossing the waterline pipe at station 51+75.16 require concrete encasement? Indicate a Stub detail; include the detail on the detail sheets. SSO4: Label all items in the profile view. Provide a dimension at station 10+20, 11+81.90 16+39.27, and 16+53 between the waterline and sanitary sewer line. Show the building sanitary sewer connections in a profile view include the utilities being crossed. Will the sanitary sewer line require concrete encasement at stations 16+19.27, 16+39.27, and 16+53? SS05: Label the MH 120 in the plan view. Label all items in the profile view. Show the building sanitary sewer connections in a profile view include the utilities being crossed. Provide a dimension at station 10+37.99 between the waterline and sanitary sewer line. What is the maximum velocity allowed within a sanitary sewer line per City of Brighton sanitary sewer district? SS06: Is a drip manhole required at MH 127B or MH 126C? Also provide a detail if required. Show the building sanitary sewer connections in a profile view include the utilities being crossed. Include an elevation for all utilities crossed by the sanitary sewer line. Label all items in the profile view. Provide a dimension at station 10+20 between the waterline and sanitary sewer line. SS07: Include an elevation for all utilities crossed by the sanitary sewer line. DT01: Include a drop manhole detail. Include an encasement detail for the sanitary sewer line. Should a storm line cross a sanitary sewer line concrete saddles shall be used on either side of the sanitary sewer line to carry the storm line weight. COMMENTS: Weld County Public Works received a preliminary set of drawings for onsite Roadway/Finish Grading/Pavement plans within the Vestas Wind Systems A/S project February 9, 2009 located at CR-27 and CR-6. It was prepared by Nolte Associates, Inc., the drawing were not stamped, signed and dated by a Colorado registered Engineer. -6- REQUIREMENTS for onsite Roadway/Finish Grading/Pavement plans Until Weld County roadways are annexed by the City of Brighton all notes in the General Notes section and construction drawings referring to The City of Brighton need to include Weld County Public Works. Please list the station, elevation, size, and type of all pipes for all the utility crossings under roadways in all roadway profiles to show that there are no utility conflicts with internal and external roadways. Please show contours on all grading plans in addition to the spot elevations currently shown within the construction drawings. A note stating that Weld County public works is not responsible for the utilities and internal roadways must be shown on the plans. COMMENTS: Weld County Public Works received a Final Drainage Report for the Vestas Wind Systems A/S project January 30, 2008 located at CR-27 and CR-6. It was prepared by Nolte Associates, Inc., Rick Rome, Registered Professional Engineer State of Colorado, stamp number 35103. The report was not stamped, signed, and dated. REQUIREMENTS: Storm Water Drainage: Final drainage construction and erosion controls plans (conforming to the final drainage report) stamped, signed, and dated by a professional engineer license in the State of Colorado shall be submitted with each plan. Below are repeat comments from the December 17, 2008 Public Works Drainage comments: The Final Drainage Report and all sheets must be signed, dated, and stamped by a professional engineer licensed to practice in the State of Colorado. There was no actual percolation tests taken at the site only theoretical data was used based on similar soil type. Please provide the results of (on -site) percolation tests showing the retention ponds will drain within 72 hours to comply with Colorado water rights law. In order for the retention ponds to be approved a letter of variance must be addressed to the Weld County Engineer (David Bauer, P.E.). The letter must include: • A statement of understanding of the Weld County Code (i.e.: detention is accepted by Weld County Public Works) • Acknowledgment of and agreement to the intention of the code (ie: reduce impacts of development on neighboring downstream properties by reducing storm water flows from development) • A statement why detention is not possible on the proposed site and cannot meet the Weld County Code • Request a variance to Weld County Code, and briefly discuss the specifics of the proposed alternative • Include a letter of support from a Colorado Registered Professional Engineer, with the letter stamped with the PE license, signed by the PE, and dated. This letter shall detail the proposed alternative to current code design standards, and shall outline the new approach from an engineer's perspective. -7- The Geotechnical Evaluation indicated that the on site soils were 'Highly Corrosive' as determined by the Soils Resistivity test. Special attention shall be given to all reinforcement and metal pipes being proposed to ensure the steel does not decay or corrode prematurely. The submitted information did not indicate that this was not the situation. Explain in the narrative how soil erosion will be taken care of during construction activities. Explain how the often the ponds will need to be cleaned, include the cleaning notes on the plans. Explain in detail in the narrative how the adjacent roadways will be protected from routing the off -site flows around the site. Also explain in detail, how the off -site flows will safely conveyed through the site. New Final Drainage Report comments: Please show the limits of the ponding of the off -site flows being routed around the Vestas site before they overtop the railroad tracks on the all maps. Please show the depth and amount of water that will overtop the railroad tracks and County roads. Explain how the road overtoppings will be handled in order to meet Weld County's criteria (6 inches in the 10-yr event). The acreages shown for the basins in the Appendixes do not always match the acreages shown on the map sheets. Please review and modify as necessary so that the acreages are consistent throughout. Appendix C shows a spillway design for the South Retention Pond but there is no spillway shown on the map sheets for the South Retention Pond. Please add the spillway to the map sheets. Weld County Code requires 1 foot of freeboard on all drainage related facilities (swales, ponds, etc). Calculations in Appendix C for the North Retention Pond appear to show that the pond does not have the required 1 foot of freeboard. Please review all ponds and drainage channels to ensure that they have the required 1 foot of freeboard. Appendix D appears to only contain an inlet analysis for the storm sewer located in Basin B. Please provide inlet analysis for all basins with storm inlets. Calculations in Appendix E show that Swale A is approximately 1 ft above the road centerline in the 100-yr event. Please provide calculations showing that the channel can safely convey the 10-yr event around and through the site. Please provide details on how Swale A will function during the 10-yr and 100-yr events when it turns west along WCR 6. If the swale curves to run along the north boundary of the property please provide calculations showing that the water can safely make the turn without eroding the corner. Many of the calculations in Appendix E show that in an unvegetated state, the swales need to be protected with some sort of erosion control. Please review and modify as necessary. Please include riprap calculations for any swales that empty into a pond. Please not that the design velocity for the riprap calculations on a swale cannot exceed 5 ft/s (5.5 ft/s is acceptable only for the storm sewers). Appendix G contains the riprap calculations for the storm sewer outfalls. A review of the riprap sizing indicates that most of the outfalls should have type H riprap instead of type M. Please review the riprap calculations and revise as necessary. Please plot all points on Figures MD -21 and MD -23. Please provide riprap calculations for SD -19, SD -22, and Riprap swale for South Detention Pond. -8- Please address all the reline comments within the Drainage Report and Drainage Plan. Return the redlines upon resubmittal. Please provide three complete sets of construction drawings. The drawings must be signed, dated, and stamped by a professional engineer licensed to practice in the State of Colorado. Prior to submitting three complete sets, a complete set can be submitted for review. pc: USR-1676 pc: Applicant's Engineer — Nolte Associates, Inc. — 8000 S. Chester Street, Suite 200 — Centennial, Colorado 80112 email: Kim Ogle, Planning Services M:\PLANNING - DEVELOPMENT REVIEW \USR-Use by Special Review\USR-1676, Vestas\USR-1676-FINAL-drainage_1.DOC -9- iefit wag COLORADO MEMORANDUM Weld County Planning Department GREELEY OFFICE .IAN 23?ono RECEIVED TO: Kim Ogle, Planning Services DATE: January 21, 2009 FROM: Don Dunker, P.E., Public Works as( SUBJECT: USR-1676, Vestas Wind Systems NS The Weld County Public Works Department has reviewed this proposal; this project falls primarily under the purview of the Use by Special Review Standards, Weld County Code, Chapter 23, Article II, Division 4, Section 23. Our comments and requirements are as follows: COMMENTS: Weld County Public Works received a set of Overall Utility Plans that included Stormwater lines and Stormwater Details. REQUIREMENTS: Please include the following or provide the requested notes on the plans: O. Anyone doing work within a Weld County right of way shall be required to obtain a right of way permit through the Weld County Public Works Department, contact Amy Burry at (970) 304-6496. A traffic control plan will be required. Any road closure may require Board of County Commissioner approval. P. Provide RCP and HE/RCP pipe shall be class III strength minimum or greater to handle proposed site loads. R. Provide gasket notes for RCP and HE/RCP pipe; grout notes for grouting inverts and pipes to manholes. S. Provide Bedding notes for all pipes see stormwater details sheet XX. T. Weld County will not maintain drainage related facilities within the site. U. It is the responsibility of the owner to provide maintenance, upkeep, and repair to the Drainage related facilities. Maintenance activities include but, are not limited to mowing, noxious weed control, removal of sediment and reseeding of all disturbed areas. Please label all the stormwater lines on the overall plan such as SD -05. Show the 100-yr developed storm event HGL line for all pipes these values shall match the Final Drainage Report. All of the profile views were difficult to read please correct. Include all utilities in the profile view that the stormwater lines cross. Show the retention pond plan and profile views and include the details. Please provide a specification sheet for the 18R Snout, Oil and Debris Stop. Please address all the reline comments within the Drainage Report and Drainage Plan. Return the redlines upon resubmittal. Please provide three complete sets of construction drawings. The drawings must be signed, dated, and stamped by a professional engineer licensed to practice in the State of Colorado. Prior to submitting three complete sets, a complete set can be submitted for review. pc: USR-1676 pc: Applicant's Engineer— Nolte Associates, Inc. — 8000 S. Chester Street, Suite 200 — Centennial, Colorado 80112 email: Kim Ogle, Planning Services M:\PLANNING — DEVELOPMENT REVIEw\USR-Use by Special Review\USR-1676, Vestas\USR-1676-FINAL-drainage_1.DOC 1v COLORADO MEMORANDUM TO: Kim Ogle, Planning Services DATE: December 17, 2008 FROM: Don Dunker, P.E., Public Works SUBJECT: USR-1676, Vestas Wind Systems A/S The Weld County Public Works Department has reviewed this proposal; this project falls primarily under the purview of the Use by Special Review Standards, Weld County Code, Chapter 23, Article II, Division 4, Section 23. Our comments and requirements are as follows: COMMENTS: Weld County Public Works received a Final Drainage Report for the Vestas Wind Systems NS project December 8, 2008 located at CR-27 and CR-6. It was prepared by Nolte Associates, Inc., Rick Rome, Registered Professional Engineer State of Colorado, stamp number 35103. The report was stamped and signed. REQUIREMENTS: Storm Water Drainage: Final drainage construction and erosion controls plans (conforming to the final drainage report) stamped, signed, and dated by a professional engineer license in the State of Colorado shall be submitted with each plan. Below are repeat comment from November 3, 2009 Public Works Drainage comments. There was no actual percolation tests taken at the site only theoretical data was used based on similar soil type. Please include pages from the Geotechnical Report that support the fact that ground water is 12' to 15' deep and the retention ponds will drain within 72 hours to comply with Colorado water rights law. Please provide the results of (on -site) percolation tests. The report did not have any information on the percolation rate of the soils to support the fact that the retention ponds would drain within 72 hours to comply with Colorado water rights law please include this information within the final report. Please provide bedding material calculations and geo-fabric calculations used under the proposed riprap per HEC-15. Please include Emergency Spillway Calculations for both ponds. Please show the location of each spillway on the Drainage Plan. The south pond does show the spillway and the North pond does not. Geotechnical Report: Preliminary Geotechnical Evaluation was completed by Ground Engineering Consultants, Inc., dated June 10, 2008. The report was stamped, signed, and dated by a professional engineer license in the State of Colorado, James B. Kowalsky, P.E., stamp number 27680. A final report shall be submitted and stamped, signed, and dated by a professional engineer license in the State of Colorado. Public Works did not receive a copy of the Final Geotechnical Evaluation. The Geotechnical Evaluation indicated that the on site soils were 'Highly Corrosive' as determined by the Soils Resistivity test. Special attention shall be given to all reinforcement and metal pipes being proposed to ensure the steel does not decay or corrode prematurely. The submitted information did not indicate that this was not the situation. New Final Drainage Report comments. The Final Drainage Report must be signed, dated, and stamped by a professional engineer licensed to practice in the State of Colorado. Please include Maps of the Historic Drainage patterns, larger scale of Sub Basins, each pond at a larger scale, Off -site Basin map and Storm water details. All maps shall be stamped, signed, and dated by a professional engineer license in the State of Colorado. Include a copy of the State of Colorado Stormwater Discharge permit as part of the Drainage Report. Explain in the narrative how soil erosion will be taken care of during construction activities. Explain how the Water Quality Capture feature will work and how often the ponds will need to be cleaned, include the cleaning notes on the plans. Include a seed mix for the ponds and swale areas; explain in detail which areas will be irrigated. Please show the limits of the ponding of the off -site flows being routed around the Vestas site before they overtop the railroad tracks on the Off -site basin map. All swales shall be checked with the n value in the bare soil state (velocity and Froude number) and fully vegetated state (depth and Froude number). Erosion protection shall be installed during the bare soil state to allow the vegetation to become established. If the swales are not irrigated it may take 3 — 5 years for them to become fully vegetated with native grasses. Provide plan and profile views of all pipes and culverts and include the HGL lines for each one. Explain in detail how the adjacent roadways will be protected from routing the off -site flows around the site. Please address all the reline comments within the Drainage Report and Drainage Plan. Return the redlines upon resubmittal. Please provide three complete sets of construction drawings. The drawings must be signed, dated, and stamped by a professional engineer licensed to practice in the State of Colorado. Prior to submitting three complete sets, a complete set can be submitted for review. pc: USR-1676 pc: Applicant's Engineer— Nolte Associates, Inc. — 8000 S. Chester Street, Suite 200 — Centennial, Colorado 80112 email: Kim Ogle, Planning Services M:\PLANNING — DEVELOPMENT REVIEW\USR-Use by Special Review\USR-1676, Vestas\USR-1676-FINAL-drainage_1.DOC 2 Hello