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HomeMy WebLinkAbout 18-31 Cottowood Hollow FP FDP F1RESOLUTION N0.18-31 A RESOLUTION APPROVING A FINAL PLAT AND FINAL DEVELOPMENT PLAN FOR COTTONWOOD HOLLOW, FILING 1 WHEREAS, there has been submitted to the Planning and Zoning Commission and Board of Trustees of the Town of Firestone a request for approval of a final plat and final development plan for Cottonwood Hollow, Filing 1, the initial subdivision of property within the area comprising the Cottonwood Hollow Outline Development Plan (the "Cottonwood Hollow ODP"); and WHEREAS, by Resolution No. 13-22 adopted on May 22, 2013, the Board of Trustees adopted the Firestone Development Regulations; and WHEREAS, all materials related to this application have been reviewed by Town Staff and found with conditions and the exception noted herein to be in compliance with Town of Firestone subdivision and zoning ordinances, Development Regulations, and related Town ordinances, regulations, and policies; and WHEREAS, the Firestone Planning and Zoning Commission held a properly noticed public hearing on the application, and has forwarded to the Board of Trustees a recommendation of approval with conditions; and WHEREAS, the Board of Trustees on August 22, 2018 and September 12, 2018 held a duly - noticed public hearing, at which evidence and testimony were entered into the records and WHEREAS, Section 8.4.16.4.H of the Firestone Development Regulations requires all homes within the Town to be constructed with basements where technically feasible as determined by the Town Engineer; and WHEREAS, the applicant has provided geotechnical data and a professional opinion that most of the Cottonwood Hollow ODP would not reasonably support basement construction due to the presence of groundwater; and WHEREAS, while this groundwater condition is not prevalent in the area comprising Cottonwood Hollow Filing 1, the Board of Trustees finds it furthers the Town's goal of orderly planning and implementation of the Town's growth and development policies to consider the geotechnical limitations of future filings within this cohesive development in the context of the Town's basement requirement for this Filing 1; WHEREAS, the Board of Trustees further finds the existing industrial development adjacent to Filing 1 on three sides, including (a) Crestone Peak, which currently operates amulti-well oil and gas production, processing, and storage facility to the north; (b) United Power, which owns a parcel of land abutting Filing 1 on the west, and which property is currently under development review by Weld County to allow outdoor storage of equipment and materials; and (c) Otterbox, which operates a manufacturing plant that abuts most of the southern limits of Filing 1, the price point necessary for single family residential homes with basements to be successfully marketed is not expected to be achievable; and WHEREAS, the Board of Trustees concludes sufficient evidence has been presented by the applicant demonstrating that requiring strict conformance with the Town's basement requirement in the context of this particular application would not further the Town's policies and goals and basements will therefore not be required within Filing 1; and WHEREAS, the Board of Trustees finds the proposed final plat and final development plan should be approved, subject to those conditions set forth herein NOW, THEREFORE, BE IT RESOLVED BY THE BOARD OF TRUSTEES OF THE TOWN OF FIRESTONE, COLORADO: Section 1. The Final Plat and Final Development Plan for Cottonwood Hollow, Filing 1 are hereby approved, subject to the conditions set forth in Exhibit A attached hereto and incorporated herein by this reference. PASSED AND ADOPTED this 12�' day of September, 2018. �� 4t Sindeli ATTEST: LL Leah Vanarsdall, Town Clerk 2 EXHIBIT A Final Plat and Final Development Plan Cottonwood Hollow, Filing I Conditions of Approval General 1. Provide an updated title commitment when the mylars are provided for recording. 2. Execute a subdivision agreement, in a form to be approved by the Town Attorney. 3. Revise the plat and FDP to show flowlines and label required setbacks for all oil and gas facilities, including pipelines. 4. Provide evidence satisfactory to the Town of the oil and gas company's consent for the proposed improvements within the 50' gas easement (irrigation pipe/easement, sanitary sewer and underdrain). 5. Provide evidence satisfactory to the Town of the Godding Irrigation Ditch Company's consent, such as by a Ditch Crossing Agreement, to the installation of the box culvert under Arbor Street. 6. Provide evidence satisfactory to the Town of the Godding Irrigation Ditch Company's consent, such as by a Ditch Crossing Agreement, to the water line crossings. 7. Execute a special wal7anty deed conveying to the Town Tracts E, F, K and L free and clear of any liens or encumbrances, with title insurance using a land value of $25,000 per acre. 8. Provide executed easements satisfactory to the Town for the following: a. 12 water line from Sable Avenue north to the south end of Jake Jabs Boulevard in the future Arbor Street alignment, granted to the Town (or a special warranty deed conveying fee ownership to the Town of the ultimate Arbor Street right-of-way); bo the water line that runs along the south and east of the property (outside the Filing 1 boundary) to the Sable Avenue right-of-way; and c. the 8" water line that runs north of the Sable Avenue right-of-way to the west end of Sandy Ridge Avenue. 9. At or prior to the time of conditional acceptance of the public improvements, those tracts shown on the final plat and FDP to be owned and maintained by the metropolitan district shall be conveyed to the metropolitan district. 10. Update the Hydraulic Analysis Report narrative based on redlines from the Town Engineer. 11. Revise the Final Drainage Report as noted in redlines provided by the Town Engineer. 12. Revise the narrative for Basin 200 in the Final Drainage Report to add a statement regarding the sizes of the pond outlet pipes. 13. Revise the Final Drainage Report to include Appendix A. Vicinity Map. 14. In Appendix B (Hydrologics) of the Final Drainage Report, coes in the area shown for Basin EX-2 and the Drainage Map and update all calculations. Provide runoff calculations for Culverts #144 for the 100-year storm event. 15. In Appendix C (Hydraulics) of the Final Drainage Report, clean up the order of calculations in appendix and remove any old data (i.e., detention pond calculations appear twice; box culvert calculations appear twice, once with the wrong box size). a. FAA Detention/Outlet Pipes: Remove the reference to Full Spectrum storage requirement for both ponds since this was not used. Update 100-year WSEL for Pond 1 orifice plate calculation. Clarify how outlet pipes were sized and what is the WSEL in Godding Hollow when ponds peak. Provide calculations for the outlet pipes. b. Inlets: Design Inlet 201 for the ultimate condition, taking the 100-year runoff from Basins 206 and 207. Confirm if the inlets are intended to function as sump or on - grade inlets and what the actual available ponding depth is at these inlets. Make further revisions as shown in the Final Utility Plan Street plan and profile comments from the Town Engineer. c. UDSewer: Label plan sketches with Storm Sewer name to match Final Utility Plans. For Storm Sewer 200, fix inconsistencies between calculations and Storm plan and profile. d. Culverts: Revise plans as necessary to provide culverts designed to convey the 100-year storm event and reflect a minimum culvert size of 18 inches in the public right-of-way. e. Swales: Label triangular channel analysis in Final Drainage Report. The normal flow analysis for Swale E in the Final Drainage Report is trapezoidal instead of triangular as shown on the plans. £ Box Culvert: Reconcile and update the two different calculations provided in the Final Drainage Report (open channel normal depth calculation and culvert calculation). Provide the Town Engineer with calculations from the ditch company. 16. Revise Drainage Maps as reflected in Town Engineer redlines. Final Plat 17. On Sheet 1, delete the Lender's Consent signature block. 18. Revise the plat to reflect the 60' wide Godding Irrigation easement being dedicated by this plat continuing through Tracts F and H. 19. On Sheet 6, the water easement needs to be called out as a " 20' exclusive water line easement to the Town of Firestone." 20. Revise plat to address Town Engineer redlines. FDP Sheet 1 (Cover Sheet) 21. Add water dedication paragraph as directed by the Town Engineer. 22. In the Water Meter Table, clarify whether another irrigation tap is needed for Tracts P, O, and a portion of M. FDP Sheet 2 (General Notes) 23. Update the Residential Density Filing 1 table to reflect the correct density of 3.78 DU/AC as shown in the provided exhibit for Filing 1. 24. Remove duplicate information between the Setbacks Table B and the notes provided underneath the table. Only provide information in notes that is in addition to the information provided in the table, or that needs clarification. Add pool setback information to the table. 25. In the Land Use Table, revise the use for Tracts E and F from "OS/Drainage" to "Detention Pond." 26. In the Park Development section, delete the sentence reading "Open space being dedicated to the Town of Firestone with Filing 1 includes Tracts `E' and `F'." 27. In the Landscaping section, update the irrigated/landscaped tracts to include Tracts B, C, D, T, O, P, and a portion of M. FDP Sheet 6 (Site Grading Plan 3) 28. Provide the total square footage of Lot 1 in Block 3. 29. Show the mailboxes in Tract D, which must be located outside the sight distance easement. FDP Sheet 8 (Overall Utility Plan) 30. Revise to address Town Engineer comments regarding Final Utility Plan. FDP Sheets 10 and 11 (Landscape Plan) 31. Label all tract areas that will be landscaped and irrigated as "permanently irrigated." FDP Sheet 12 (Landscape Plan) 32. Modify Note 11 as redlined by the Town Engineer to include a portion of Tract M and Tracts O and P. FDP Sheets 1445 and 17 (Irrigation Plan) 33. Show the irrigation service to Tract B. Clarify now Tracts P, O and a portion of Tract M will be irrigated. If there will be an additional point of connection, irrigation service, and backflow preventer, show and label accordingly. FDP Sheet 20 (Address Map) 34. Add grid to address table to make it more easily read. Final Utility Plans (FUP) 35. Sheets 1-70 (Benchmark): Correct benchmark note to reference the correct benchmark for this project and give the conversion to Firestone's NGVD 1929 vertical datum. 36. Sheets 4.30-4.31 (Grading Plan): a. Show and label the existing 100-year base flood elevation along Godding Hollow. b. Label Pond 1 information and show existing easements on Sheet 4.30. c. Label Tracts M, N, O and P. d. Provide reasonable cross slope to pond access roads to accommodate maintenance vehicles. e. Fix steep grading near ponds. f. Confirm pond grading in Tract E does not extend into the Arbor Street right-of- way. g. Check over grading plans. On Sheet 4.31, it appears that contours are crossing over each other. The grading in Arbor Street south of the turnaround does not match the Arbor Street plan and profile. The final grading of Arbor Street south of the turnaround must be done with this Filing 1 to provide adequate cover over the proposed 12" water line. Provide more spot elevations at the street intersections. The section E-E swale E shown on the Grading Plan Sheet 4.31 does not match the section shown on Storm plan and profile Sheet 7.11. 37. Sheets 5.20, 5.21 (Sanitary Plan and Profile): Correct the existing gas crossing to a single 8" gas pipe. 38. Sheet 6.11 (Detailed Water Plan): Correct flag notes as shown in Town Engineer redlines. If there is a separate irrigation tap/service/meter for Tracts P, O, and M, it needs to be shown and labeled. 39. Sheets 6.14 and 6.15 (12" Water Plan and Profile, Arbor): Call out the steel casing, water line lowering, and reference the appropriate details. Fix joint restraint length from 39" to 39. Label the vertical bends for the water lowering with stationing. Fix the profile elevations to align with the profile grid and align profile stationing with plan view stationing. Add joint restraint length note to Sheet 6.15. 40. Sheets 6.15 and 6.17 (12" Water Plan and Profile, Arbor): Revise to show future Arbor Street fill to provide a minimum 5' cover over the proposed 12" water line. On Sheet 6.17, revise plans to reflect the water line to be set 5' below the final grade of Arbor Street. Clarify why the plans show fill from Station 5+00+7+00. Show proposed contours on the Grading Plan for this area and show the end of Arbor Street in the profile. 41. Sheet 6.16 (Overall Water Plan): Update sheet with new water line tie-in location. 42. Sheet 6.18 (12" and 8" Water Plan and Profile, offsite south): Add joint restraint note to Sheet 6.18 as reflected in Town Engineer redlines. 43. Sheet 6.19 (8" Water Plan, offsite east): Revise plans to show existing fence in the actual location and reflect the existing fence will be physically moved in the field to the property line (or move the water line 10' from the location of the existing fence). 44. Sheet 6.19 and 6.20: Revise plans to reflect the proposed 8" water line will be located outside of the existing asphalt in Sable Avenue; the water line needs to be located under a future lane line or under the center of a future lane line in the existing right -of --way (see Town Engineer Sable Street redlines). Project existing finished grade of paved road for future finished grade over water line, which water line depth must work for both existing condition and ultimate condition. Shift the road side ditch as necessary so the water line is not underneath it. 45. Sheet 6.20 (8" Water Plan, Sable Avenue): Call out open cut to cross Sable Avenue, reference tee cut detail, patch must be 10' wide minimum. Revise plans to reflect Sable Avenue pavement is a composite section (4" asphalt with 14" aggregate base course) and that steel casings will be provided for both water line lowerings under the Godding Irrigation ditch. Call out joint restraint lengths. 46. Sheets 7.10-7.12 (Storm Sewer Plan and Profile): Label the stationing for all FES, Finished Grade, Existing Grade in profiles, 100-year HGL, 100-year floodplam. Revise to reflect culverts in road right -of --way will carry 100-year storm event (Culverts #144) and to specify a minimum culvert size of 18". Confirm the finished grades in storm profiles (Culvert #1, basin 1004, basin 200); refer to Town Engineer redlines. Fix pipes in basin 100 profile. Remove the concrete encasing symbol from the storm plans and profiles. On Sheet 7.10, replace flag note #4 with general note #5 and revise flag note #1 as shown in Town Engineer redlines. On Sheet 7.11, replace flag note #7 with general note #6. 47. Sheet 7.11 (Storm Sewer Basin 200 Plan and Profile): Correct discrepancies on Storm Sewer Basin 200 between the profile and the Final Drainage Report. Correct manhole sizes. Provide detail for STRM MH-201. Clarify whether MH-201 will be a CDOT junction box with an eccentric cone top or flat top. Correct the proposed grade been inlets 201 and 200 to reflect a 2% cross slope and roadside ditches. 48. Sheet 7.11 (Storm Sewer Basin 200 Plan and Profile): Revise to correct the conflict with the drainage report in the design of the inlets in Rangeview Circle. Confirm whether the inlets are intended to function as sump or on -grade inlets and what is the actual ponding 7 depth at these inlets. See Town Engineer's Arbor Street and Rangeview Circle street plan and profile comments. 49. Sheet 7.20 (Godding h7•igation Box Culvert): Label HGL for 60 cfs design flow. Confirm ultimate Arbor Street section tie-in slopes do not exceed 4:1. 50. Sheets 7.21-7.22 (Irrigation Culvert Diversion): Confirm there is enough cover over the buried pipe in the rear lots along the entire western boundary. On Sheet 7.22, add the profile missing from Sta 12+50 to 15+00. Revise to show the water line and sanitary sewer crossings in the profile. Darken the profile text and proposed grade at the centerline of the channel. 51. Sheets 7.40-7.41 (Detention Ponds): Revise to show and label the existing (not interim) base flood elevations in Godding Hollow. Fix grading for access road(s). Clarify how outlet pipes were sized and what is the WSEL in Godding Hollow when ponds peals. Provide calculations in Final Drainage Report. 52. Sheet 7.40 (Detention Pond 1, Tract F): Revise to show the private underdrain system will not tie into the public detention pond outlet pipe. Remove the manhole on the outlet pipe. Show outlet pipe stationing. Update Pond 100-year WSEL to match drainage report. 53. Sheet 7.41 (Detention Pond 2, Tract E): Label dimension units on Orifice Plate detail. Correct contours in Arbor Street south of asphalt turnaround. 54. Sheets 7.90-7.93 (Storm Details): Update the riprap table for Culverts #1-#4 with 100-year flows. Replace the flat top manhole detail with the Town's updated detail. Show the Town's handrail detail for the box culvert headwall, as provided by the Town Engineer. 55. Sheet 8.10 (Arbor Street Plans and Profile): Confirm whether the Town can fit driveway cut with crosspan and curb returns and Type R inlet near oil and gas access (approximately Station 95+62). 56. Sheet 8.11 (Arbor Street Plans and Profile): Revise to reflect Inlet 201 designed for the ultimate condition, taking the 100-year runoff from Basins 206 and 207. Revise to show crosspan will be installed at Rangeview Circle and Arbor Street. Consider building curb and gutter on west side of Arbor Street in ultimate location from Rangeview Circle to Rangeview Circle and eliminate Inlet 208 and pipe to Inlet 203. 57. Sheet 8.13 (Rangeview Street Plans and Profile): Regarding Inlets 202, 203, 204, and 205, either modify the spot elevations on the street plans and profile sheets so the inlets are at low points and use the actual available ponding depth in the inlet calculations or design the inlets as on -grade inlets, update calculations for inlets, and add crosspans to the intersections. Provide enough spot elevations so that the inlet ponding can be verified by the Town Engineer. 58. Sheets 8.22 and 8.25 (Arbor Street Cross Sections, Station 95-rozy Update the section to reflect the low point in Arbor Street has been moved to Station 95+62. Remove note "inlet 104 with interim grate." Clarify this is a future Type R, not interim. Update storm pipe size. 59. Sheet 8.25 (Arbor Street Cross Sections, Station 110+88): Label Type R Inlets 201 and 200 with interim grates. Clarify how runoff will get to Inlet 201 grate; there is no roadside ditch shown in the cross section or the grading plan. 60. Sheets 8.30-8.32 (Striping): Revise plans to coi7•ect the left turn lane striping and taper on Arbor Street approaching Sable Avenue. Remove channelized striping at Station 103+00. Revise construction note #8 to read "center turn lane". Turn on asphalt hatch. 61. Sheet 8.50 (Roadway Detail): Revise plans to replace old Detail E with the Town's new street tee cut detail.