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HomeMy WebLinkAboutSite Certifications - 12/07/201812/15 Page 1 OVERALL SITE and DRAINAGE CERTIFICATION Commercial, Multi-Family and Subdivision Certification Form and Checklist Project Name: Date: Building Permit Numbers: (Commercial or multi-family) Per the requirement in Fort Collins Stormwater Criteria Manual (FCSCM) Volume 1, Section 6.11, please fill in all applicable items in this Certification Form for Commercial, Multi-Family and Overall Single Family sites. NOTE: several items must be verified during construction. A copy of the approved grading plan must be submitted with the as-built grading plan. (As-built elevations must be written in red next to the approved elevations.) •Use “Yes” for items completed as described. •Use “N/A” for items that are not applicable to the site being certified. •If any blanks are “No,” attach an explanation referencing the item number below. Attach an explanation or description of the as-built condition for any items listed or for anything not listed but shown on the approved construction plans. Provide an as-built redline or Mylar drawing with the following: I.Water Quality and Quantity Detention Basin Certification - FCSCM Vol.2, Ch.10 For multiple detention basins on a site, provide the following for each basin separately: A. Volume: As-built topographic verification is attached at 1-foot (or less) contour intervals and volume verification calculations for the water quality capture volume and the 100-year detention storage volume. 1. Detention basin topography was prepared by a professional land surveyor registered in the state of Colorado. 2.Both proposed and as-built contours are shown on the same plan sheet (dashed lines for proposed and solid lines for as-built). 3.All critical spot elevations as shown on the approved construction plans have been verified and the as-built elevations are shown on the plan sheet. 4.Stage-storage-discharge tables are provided on a separate document. 5.Verification that designed drain time is in compliance with Colorado Revised Statute § 37-92- 602(8) is attached and has been uploaded to the Statewide Compliance Portal (tinyurl.com/COCompliancePortal) for approval. Uploaded documents must include: a.The cover sheet from the approved drainage report b.The stamped certification page from the approved drainage report c.As-built topographic survey d.Stamped certification page from the Overall Site & Drainage Certification e.PDF output from the Stormwater Detention and Infiltration Design Data Speadsheet 12/15 Page 2 B.Water Quality and Quantity Detention Basin Grading: Attached is as-built verification that there is a minimum 2% positive fall into the concrete trickle pans or flow-line(s) from all areas in the bottom of the detention pond. If there is a “soft pan” in the flow-line, all areas still must meet the minimum 2% grade requirement. 1.Low Flow: Choose one of the following detention basin low flow options as applicable: a. Turf swale for low flow path in detention basin. There is a minimum 2% grade in the flow-line(s) of the detention basin. The flattest as-built grade is . b.Concrete pan for low flow in detention basin. There is a concrete pan installed that meets the grades as shown on the approved construction plans. (Show as-built spot elevations.) c.Soft pan for low flow in detention basin. •Verify and document the soft pan material gradation, trench width and depth - to be verified during construction by engineer. Picture documentation is preferred or engineer’s statement of visual inspection and compliance. (Choose one below.) o There is a soft pan with an underdrain installed that meets the design on the approved construction plans. (Show the underdrain grades, bedding material, geotextile, spot elevations, bends, cleanouts, etc.) o There is soft pan installed without an underdrain but there is a type A or B soil. The soil type must be documented by supplying verification from a registered professional geotechnical engineer. NOTE: Spot elevations are to be within 0.2 ft. +/-. 2. Side Slopes: The as-built side slopes of the detention basin have been calculated and are shown. Indicate the side slope with an arrow and a numerical value (e.g., 6.25:1). The maximum slope allowed is 4:1. Small areas of 3:1 may be acceptable, but slopes steeper than 3:1 must be stabilized or re- graded. Provide documentation if a variance was granted for steeper slopes during the design process. 3.Spillway Certification: The following items must be field verified: a.The location of the spillway is indicated on the as-built plan. b.The width of the spillway is indicated on the as-built plan. c.The elevation(s) of the spillway is shown on the as-built plan. d.A concrete ribbon defines the location and grade of the spillway. e.There is downstream scour protection in the spillway as per the construction plans. Indicate type: (riprap size “D50” gradation and bedding type, geotextile, buried riprap with inches of bury, etc.). f.There are no obstructions in the spillway, such as trees, bushes, sidewalks, landscape features, rocks, etc. 12/15 Page 3 4.Outlet Structure Certification a.The orifice plate for the approved release rate is installed with the correct size and location of the orifice. b.The orifice plate for the water quality outlet is installed with the correct hole size, number of rows and columns of holes. c.The bottom hole on both the water quality and quantity outlets are at the bottom of the plate so no water ponds in front of the plate. d.The well screen is the correct material and is installed as shown on the construction plans. e.100-year overflow grate elevation is . (Elev. A on detail D-46) f.The top elevation of the water quality capture volume is . (Elev. B on detail D-46) g.Overflow grate is made of the correct material, has the correct bar spacing, is hinged at the top and bolted at the bottom. h.The bottom of the outlet box has no obstructions or misalignments that will cause it to retain runoff water and is sloped at 2% towards outlet. II.Channels/Swales - FCSCM Vol.1, Ch.7, Sect.3&4 A. Capacity: The as-built capacity of all the major channels and swales has been verified. They meet or exceed capacity requirements shown in the approved drainage study for this project. 1.All swales are located within the drainage easements as shown on the construction plans. 2.Longitudinal slopes and side-slopes (cross-sections) have been verified. Design criteria requires longitudinal slopes of 2% min. (on vegetated swales) and side-slopes no steeper than 4:1. If these criteria are not met, the certification engineer will write a justification and propose mitigation for each instance or have the issues corrected. If variances to these criteria have previously been approved and are shown on the construction plans, no justification is needed. 3.As-built spot elevations on channels/swales are shown that correspond to spot elevations shown on the approved construction plans. 4.All permanent erosion control measures are installed as shown on the approved construction plans (e.g., drop structures, riprap, TRMs, etc.). (Include pictures and verification of the materials used as part of this verification.) 5.All pans, curbs, storm pipes or other appurtenances appropriately tie into each other in the system. (Pictures at tie-in points suggested.) 6.The minimum freeboard is provided for all channels and swales as shown on the approved construction plans or as identified in the approved drainage study. (Show the freeboard provided on the cross-sections as on the construction plan set or attached as separate documentation.) 7.The low flow portion of all channels or swales is clear of obstructions. (No landscaping, trees, shrubs, sod, etc. infringe on the low flow portion of channels or swales.) 12/15 Page 4 III.Storm Pipes (aka storm drains) - FCSCM Vol.1, Ch.6, Sec. 4 A. Storm Drain Pipe Capacity: The as-built capacity of all pipes installed on this project has been verified and meets or exceeds the capacity requirements shown in the approved drainage study for this project. 1.All storm drain pipe sizes and materials have been verified and are in conformance with the approved construction plans. (Indicate on the plan and profile sheets that they have been verified.) Material and size substitutions must be approved prior to installation. If a pipe size or material was changed during construction, the certification engineer must attach the approval documents or supply them with this certification. Approval documents must include a calculation documenting the capacity equivalency (equal or greater) of the substituted size. 2.The longitudinal slope of the pipe is as shown on the approved construction plans. The acceptable minimum slope is 0.4%. All slopes flatter than the designed slope on the construction plans must be justified with capacity calculations on an attached sheet. 3.The as-built invert elevations have been verified and are shown on the plan and profile sheets of the approved construction plans. B.Storm Drain Pipe Installation Requirements: All pipes are installed in accordance with the approved construction plans. 1.The minimum cover requirements for all pipes have been met as shown on the approved construction plans. These will be called out in critical locations. 2.All encasements and clearances as specified on the approved construction plans have been met. 3.Any specific joint types or construction methods specified on the approved construction plans have been met. (List on a separate sheet and attach to this certification.) IV.Concrete Pans - FCSCM Vol.1, Ch.7, Sec.4.1.3.4 A. Construction/Installation: All concrete pans have been constructed in accordance with the approved construction plans. 1.The concrete pans are the correct size/width as shown on the approved construction plans. 2.The longitudinal slopes of the pans are as shown on the approved construction plans. The certification engineer must justify or mitigate longitudinal slopes less than the minimum of 0.4% unless a flatter slope was approved and is shown on the approved construction plans. Provide mitigation or justification by separate document. 3.The cross-section of the pan is as shown on the construction plans. (Specifically, the pan cross- section is “V” shaped and meets the side slope shown on the detail.) 4.The concrete pans are a minimum of 6 inches thick without reinforcement and a minimum of 4 inches thick with a minimum of 6X6-W14xW14 reinforcement per detail D20B and D20C. (Provide documentation of the reinforcement used if different than shown on the details or on the approved construction plans.) 5.The spot elevations shown on the concrete pan(s) have been verified and are shown on the as- built drawings. 4920 4925 4930 4935 4940 4945 4950 4920 4925 4930 4935 4940 4945 4950 189+00190+00191+00192+00193+00194+00195+00196+00197+00198+00199+00200+00 18" MIN. 18" MIN. STA=190+00.00 FES D 66" FES INV IN (66" N)=4930.99 66''RCP 189.94 LF @ 0.40% STA=191+89.94 SDMH D1 8'Ø FLAT TOP MH RIM=4940.96 INV IN (66" NE)=4931.75 INV OUT (66" S)=4931.75 DEPTH=9.21 66''RCP 100.22 LF @ 0.40% STA=200+00.00 (STORM D2) STA=192+90.16 STORM D SDMH D2 8'Ø FLAT TOP MH RIM=4941.36 INV IN (66" N)=4932.15 INV IN (30" E)=4932.15 INV OUT (66" SW)=4932.15 DEPTH=9.21 66''RCP 119.45 LF @ 0.40% STA=194+09.62 SDMH D3 8'Ø FLAT TOP MH RIM=4941.84 INV IN (66" NE)=4932.63 INV OUT (66" S)=4932.63 DEPTH=9.21 66''RCP 137.51 LF @ 0.40% STA=210+00.00 (STORM D4) STA=195+47.13 STORM D SDMH D4 11'X10' BOX BASE MH RIM=4942.24 INV IN (60" N)=4933.18 INV IN (36" W)=4934.68 INV OUT (66" SW)=4933.18 DEPTH=9.06 60''RCP 148.91 LF @ 0.44% STA=196+97.21 INLET D5 12' QUAD TYPE 16 COMBO INLET TBC=4944.85 INV IN (60" N)=4934.03 INV OUT (60" S)=4933.83 DEPTH=11.01 60''RCP 121.83 LF @ 0.44% STA=198+22.06 INLET D6 10' CDOT TYPE R INLET TBC=4945.64 INV IN (60" N)=4934.77 INV OUT (60" S)=4934.57 DEPTH=11.07 60'' RCP 5.59 LF @ 0.44% STA=229+99.96 (STORM D7) STA=198+29.15 STORM D SDMH D7 8'Ø FLAT TOP MH RIM=4945.43 INV IN (18" N)=4938.29 INV IN (60" E)=4934.79 INV OUT (60" S)=4934.79 DEPTH=10.63 60''RCP 56.84 LF @ 0.40% STA=198+85.99 SDMH D8 8'Ø FLAT TOP MH RIM=4945.73 INV IN (60" N)=4935.02 INV OUT (60" W)=4935.02 DEPTH=10.71 60''RCP 242.23 LF @ 0.40% STA=195+80.56 TOP=4931.26 8" WATER CROSSING STA=199+04.94 TOP=4933.03 WATER CROSSING STA=198+96.26 INV=4931.42 SANITARY CROSSING STA=195+60.64 INV=4926.61 18" SANITARY CROSSING PROPOSED GRADE EXISTING GRADE HGL HGL HGL HGL HGL HGL HGL HGL HGL HGL HGL HGL HGL HGL HGL HGL HGL HGL HGL 100 yr HGL CONCRETE CUT-OFF WALL SD11 JEP CMG Date Issue / Description# THESE PLANS ARE AN INSTRUMENT OF SERVICE AND ARE THE PROPERTY OF GALLOWAY, AND MAY NOT BE DUPLICATED, DISCLOSED, OR REPRODUCED WITHOUT THE WRITTEN CONSENT OF THE ARCHITECT. COPYRIGHTS AND INFRINGEMENTS WILL BE ENFORCED AND PROSECUTED. 3760 E. 15th Street, Suite 202 Loveland, CO 80538 970.800.3300 O www.gallowayUS.com C 2015. Galloway & Company, Inc. All Rights Reserved Init. OF 188 SHEETS SHEET TITLE: Date: Drawn By: Project No: Checked By: HFHLV0001.01 12.05.16 EAST RIDGE HOLDINGS 4801 Goodman Rd. Timnath, CO 80547 970.674.1109 KEYMAP STA: SCALE:H: 1"=V: 1"= toSTORM DRAIN D 190+00.00 200+00.00 50 5 MATCH LINE SEE SHEET: STA: SD12 200+00.00 SD11 SD12 CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU DIG, GRADE, OR EXCAVATE FOR THE MARKING OF UNDERGROUND MEMBER UTILITIES. CALL UTILITY NOTIFICATION CENTER OF COLORADO R DateCity Engineer Date Date Date Date Stormwater Utility Parks & Recreation Traffic Engineer Date APPROVED: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: Water & Wastewater Utility City of Fort Collins, Colorado UTILITY PLAN APPROVAL Environmental Planner LEGEND: NOTES: 1. ALL UTILITY LOCATIONS SHOWN ARE BASED ON MAPS PROVIDED BY THE APPROPRIATE UTILITY COMPANY AND FIELD SURFACE EVIDENCE AT THE TIME OF SURVEY AND IS TO BE CONSIDERED AN APPROXIMATE LOCATION ONLY. IT IS THE CONTRACTOR'S RESPONSIBILITY TO FIELD VERIFY THE LOCATION OF ALL UTILITIES, PUBLIC OR PRIVATE, WHETHER SHOWN ON THE PLANS OR NOT, PRIOR TO CONSTRUCTION. REPORT ANY DISCREPANCIES TO THE ENGINEEER PRIOR TO CONSTRUCTION. 2. JOINTS ON ELLIPTICAL PIPES SHALL BE TONGUE AND GROOVE WITH FLEXIBLE JOINT SEAL COMPOUND PER THE PIPE MANUFACTURER STANDARDS AND AS APPROVED BY CITY INSPECTOR. 3. PIPE LENGTHS ARE CALCULATED FROM THE CENTER OF MANHOLES AND INLET BOX STRUCTURES. LAYING LENGTH INCLUDES FLARED END SECTIONS. 4. RCP SHALL BE CLASS III OR GREATER. PIPE MATERIAL, BEDDING, AND INSTALLATION WITHIN PUBLIC RIGHTS-OF-WAY SHALL BE GOVERNED BY THE CITY OF FORT COLLINS. ALTERNATES (SUCH AS ADS N-12 OR HP SANITITE) OUTSIDE OF THE R.O.W. SHALL BE APPROVED IN ADVANCE BY THE ENGINEER. ALL JOINTS SHALL BE 'WATERTIGHT' USING APPROPRIATE GASKETS OR JOINT WRAPS (PER ASTM C443 FOR RCP AND PER ASTM F477 / D3212 FOR PLASTIC PIPE). 5. ALL STORM MANHOLES LOCATED IN SIDEWALKS AND TRAILS SHALL HAVE PEDESTRIAN RATED LIDS. 6. MANHOLE DIAMETERS SHOWN ARE PER CITY STANDARD DETAIL D-3. CONTRACTOR SHALLVERIFY THAT MANHOLE DIAMETERS ARE SUFFICIENT FOR INSTALLATION (i.e., WITHIN PRE-CASTER'S TOLERANCES, ETC.). 7. SEE DETAILS FOR RIPRAP PAD SIZING. 8. PROVIDE WATER TIGHT JOINTS PER ASTM C443 AT ALL CIRCULAR STORM PIPE. 9. MANHOLES SHALL BE SHAPED UNLESS OTHERWISE NOTED. 10. SANITARY SEWER INVERTS ARE SHOWN FOR INFORMATION ONLY. SEE SHEET SS01-SS35 FOR FINAL ELEVATIONS. 11. WATERLINE INVERTS ARE SHOWN FOR INFORMATION ONLY. THE CONTRACTOR SHALL VERIFY THAT 18" VERTICAL SEPARATION IS MAINTAINED BETWEEN WATER LINE AND STORM PER ELCO STANDARD DETAILS. 12. SEE SHEETS EX01-EX02 FOR EXISTING BOUNDARY CORNER COORDINATES. 13. ALL STORM MANHOLE LIDS TO BE ROTATED OUT OF CURB AND GUTTER, CROSSPANS AND SIDEWALKS. 14. MANHOLE RIM ELEVATION ARE TO BE ADJUSTED TO 14" BELOW FINISHED GRADE IN PAVED AREAS. 15. SEE SHEET DT07 FOR HEADWALL DETAILS AND SHEET GR05 FOR SPOT ELEVATIONS OF HEADWALL. 16. THE NATURAL HABITAT BUFFER ZONE SHALL BE MAINTAINED AS A NATIVE LANDSCAPE PER THE APPROVED LANDSCAPE PLAN. S PROPOSED STORM INLET EASEMENT LINE PROPOSED LOTLINE PROPOSED RIGHT-OF-WAY PROPERTY BOUNDARY PROPOSED CURB & GUTTER EXISTING GAS EXISTING OVER-HEAD ELECTRIC PROPOSED FIBER OPTIC EXISTING STORM SEWER PROPOSED STORM SEWER PROPOSED FIRE HYDRANT PROPOSED RESIDETIAL SERVICE PROPOSED SEWER SERVICE EXISTING SANITARY SEWER PROPOSED SANITARY SEWER EXISTING WATER MAIN PROPOSED WATER MAIN W 8" SS SSSS 8" 4900 4900 PROPOSED CONTOUR EXISTING CONTOUR PROPOSED WATER LINE LOWERING ( IN FEET ) 1 inch = ft. 050 50 50 100 150 1 05/24/18 Updates per Filing 3 JEP INV OUT (24" S)=4912.20 4912.48 REPRESENTS RECORD SURVEY DATA PROVIDED BY NORTHERN ENGINEERING DATED: NOVEMBER 14, 2018 AB 11/26/18 Record Drawing JEP 4933.14 4934.46 4933.12 119.50 LF 0.50%151.38 LF 0.42% 60.5 LF 7.08 LF 1.29% 4933.97 4933.78 4934.57 4934.80 4934.89 4934.94 4938.23 4935.18 4935.23 151.38 LF@ 0.42% 119.50 LF@ 0.66% 7.08 LF 1.29% 60.50 LF 49 4 5 . 7 6 6 FL = 4 9 4 4 . 1 9 49 4 5 . 6 4 49 4 5 . 9 0 41 41 18''SS 18''SS 18''SS 18''SS 18''SS 18''SS 8''SS 8''SS 8''SS 8''SS 8''W 8''W 8''W 8''W 8''W 8''W 8''W 8''W 8''W 8''W30'' RCP 27.58 LF @ 0.50% 30'' RCP 28.92 LF @ 0.50% 200+00 LOT 2 LOT 3 LOT 1 LOT 2 LOT 1 LOT 19 LOT 18 LOT 20 COMET STREET (B) DASSAULT STREET INLET D2.1 STA=200+29.08 12' Quad Type 16 Combo Inlet N:18127.5771 E:11663.7556 INLET D2.2 STA=200+61.00 15' Type 16 Combo Inlet N:18127.4185 E:11695.6719 SDMH D2 8'Ø FLAT TOP MH STA=200+00.00 STA=192+90.16 (STORM D) N: 18127.7215 E: 11634.6727 18" MIN. 4915 4920 4925 4930 4935 4940 4945 4915 4920 4925 4930 4935 4940 4945 199+50 200+00 201+00 201+50 STA=192+90.16 (STORM D) STA=200+00.00 STORM D2 SDMH D2 8'Ø FLAT TOP MH RIM=4941.36 INV IN (66" N)=4932.15 INV IN (30" E)=4932.15 INV OUT (66" SW)=4932.15 DEPTH=9.21 30'' RCP 27.58 LF @ 0.50% 30'' RCP 28.92 LF @ 0.50% STA=200+61.00 INLET D2.2 15' TYPE 16 COMBO INLET TBC=4940.08 INV OUT (30" W)=4932.63 DEPTH=7.44 STA=200+29.08 INLET D2.1 12' QUAD TYPE 16 COMBO INLET TBC=4940.02 INV IN (30" E)=4932.49 INV OUT (30" W)=4932.29 DEPTH=7.73 PROPOSED GRADE EXISTING GRADE STA=200+45.50 INV=4925.99 18" SANITARY CROSSING STA=200+55.50 TOP=4930.82 8" WATER CROSSING 100 yr HGL 4915 4920 4925 4930 4935 4940 4945 4915 4920 4925 4930 4935 4940 4945 209+50210+00211+00212+00 18" MIN. PROPOSED GRADEEXISTING GRADE STA=195+47.13 (STORM D) STA=210+00.00 STORM D4 SDMH D4 11'X10' BOX BASE MH RIM=4942.24 INV IN (60" N)=4933.18 INV IN (36" W)=4934.68 INV OUT (66" SW)=4933.18 DEPTH=9.06 36''RCP 62.19 LF @ 0.42% 36'' RCP 39.97 LF @ 0.41% STA=211+02.16 INLET D4.2 15' CDOT TYPE R INLET TBC=4942.06 INV OUT (36" S)=4935.30 DEPTH=6.76 STA=210+62.19 SDMH D4.1 6'Ø FLAT TOP MH RIM=4941.94 INV IN (24" S)=4936.14 INV IN (36" N)=4935.14 INV OUT (36" E)=4934.94 DEPTH=7.00 STA=210+92.24 TOP=4933.43 8" WATER CROSSING STA=210+75.66 INV=4926.71 18" SANITARY CROSSING HGL 100 yr HGL 4920 4925 4930 4935 4940 4945 4950 4920 4925 4930 4935 4940 4945 4950 229+50 230+00 231+00 18" MIN. STA=230+24.96 INLET D7.1 12' QUAD TYPE 16 COMBO INLET TBC=4945.56 INV OUT (18" S)=4938.41 DEPTH=7.15 18'' RCP 23.52 LF @ 0.50% STA=198+30.12 (STORM D) STA=229+99.96 STORM D7 SDMH D7 8'Ø FLAT TOP MH RIM=4945.43 INV IN (18" N)=4938.29 INV IN (60" E)=4934.79 INV OUT (60" S)=4934.79 DEPTH=10.63 PROPOSED GRADE EXISTING GRADE STA=230+19.91 TOP=4936.68 8" WATER CROSSING STA=230+09.96 INV=4931.08 8" SANITARY CROSSING 100 yr HGL 4915 4920 4925 4930 4935 4940 4945 4915 4920 4925 4930 4935 4940 4945 219+50 220+00 221+00 STA=210+62.19 (STORM D4) STA=220+00.00 STORM D4.1 SDMH D4.1 6'Ø FLAT TOP MH RIM=4941.94 INV IN (24" S)=4936.14 INV IN (36" N)=4935.14 INV OUT (36" E)=4934.94 DEPTH=7.00 STA=220+11.24 INLET D4.1A 15' CDOT TYPE R INLET TBC=4942.05 INV OUT (24" N)=4936.20 DEPTH=5.85 24'' RCP 11.24 LF @ 0.50% PROPOSED GRADE EXISTING GRADE 100 yr HGL SD13 JEP CMG Date Issue / Description# THESE PLANS ARE AN INSTRUMENT OF SERVICE AND ARE THE PROPERTY OF GALLOWAY, AND MAY NOT BE DUPLICATED, DISCLOSED, OR REPRODUCED WITHOUT THE WRITTEN CONSENT OF THE ARCHITECT. COPYRIGHTS AND INFRINGEMENTS WILL BE ENFORCED AND PROSECUTED. 3760 E. 15th Street, Suite 202 Loveland, CO 80538 970.800.3300 O www.gallowayUS.com C 2015. Galloway & Company, Inc. All Rights Reserved Init. OF 188 SHEETS SHEET TITLE: Date: Drawn By: Project No: Checked By: HFHLV0001.01 12.05.16 EAST RIDGE HOLDINGS 4801 Goodman Rd. Timnath, CO 80547 970.674.1109 KEYMAP STA: SCALE:H: 1"=V: 1"= toSTORM DRAIN D2 200+00.00 200+61.00 50 5 STA: SCALE: H: 1"=V: 1"= toSTORM DRAIN D4 210+00.00 211+02.44 50 5 STA: SCALE:H: 1"=V: 1"= toSTORM DRAIN D7 230+00.00 230+24.96 50 5 SD13 CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU DIG, GRADE, OR EXCAVATE FOR THE MARKING OF UNDERGROUND MEMBER UTILITIES. CALL UTILITY NOTIFICATION CENTER OF COLORADO R DateCity Engineer Date Date Date Date Stormwater Utility Parks & Recreation Traffic Engineer Date APPROVED: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: CHECKED BY: Water & Wastewater Utility City of Fort Collins, Colorado UTILITY PLAN APPROVAL Environmental Planner LEGEND: NOTES: 1. ALL UTILITY LOCATIONS SHOWN ARE BASED ON MAPS PROVIDED BY THE APPROPRIATE UTILITY COMPANY AND FIELD SURFACE EVIDENCE AT THE TIME OF SURVEY AND IS TO BE CONSIDERED AN APPROXIMATE LOCATION ONLY. IT IS THE CONTRACTOR'S RESPONSIBILITY TO FIELD VERIFY THE LOCATION OF ALL UTILITIES, PUBLIC OR PRIVATE, WHETHER SHOWN ON THE PLANS OR NOT, PRIOR TO CONSTRUCTION. REPORT ANY DISCREPANCIES TO THE ENGINEEER PRIOR TO CONSTRUCTION. 2. JOINTS ON ELLIPTICAL PIPES SHALL BE TONGUE AND GROOVE WITH FLEXIBLE JOINT SEAL COMPOUND PER THE PIPE MANUFACTURER STANDARDS AND AS APPROVED BY CITY INSPECTOR. 3. PIPE LENGTHS ARE CALCULATED FROM THE CENTER OF MANHOLES AND INLET BOX STRUCTURES. LAYING LENGTH INCLUDES FLARED END SECTIONS. 4. RCP SHALL BE CLASS III OR GREATER. PIPE MATERIAL, BEDDING, AND INSTALLATION WITHIN PUBLIC RIGHTS-OF-WAY SHALL BE GOVERNED BY THE CITY OF FORT COLLINS. ALTERNATES (SUCH AS ADS N-12 OR HP SANITITE) OUTSIDE OF THE R.O.W. SHALL BE APPROVED IN ADVANCE BY THE ENGINEER. ALL JOINTS SHALL BE 'WATERTIGHT' USING APPROPRIATE GASKETS OR JOINT WRAPS (PER ASTM C443 FOR RCP AND PER ASTM F477 / D3212 FOR PLASTIC PIPE). 5. ALL STORM MANHOLES LOCATED IN SIDEWALKS AND TRAILS SHALL HAVE PEDESTRIAN RATED LIDS. 6. MANHOLE DIAMETERS SHOWN ARE PER CITY STANDARD DETAIL D-3. CONTRACTOR SHALLVERIFY THAT MANHOLE DIAMETERS ARE SUFFICIENT FOR INSTALLATION (i.e., WITHIN PRE-CASTER'S TOLERANCES, ETC.). 7. SEE DETAILS FOR RIPRAP PAD SIZING. 8. PROVIDE WATER TIGHT JOINTS PER ASTM C443 AT ALL CIRCULAR STORM PIPE. 9. MANHOLES SHALL BE SHAPED UNLESS OTHERWISE NOTED. 10. SANITARY SEWER INVERTS ARE SHOWN FOR INFORMATION ONLY. SEE SHEET SS01-SS35 FOR FINAL ELEVATIONS. 11. WATERLINE INVERTS ARE SHOWN FOR INFORMATION ONLY. THE CONTRACTOR SHALL VERIFY THAT 18" VERTICAL SEPARATION IS MAINTAINED BETWEEN WATER LINE AND STORM PER ELCO STANDARD DETAILS. 12. SEE SHEETS EX01-EX02 FOR EXISTING BOUNDARY CORNER COORDINATES. 13. ALL STORM MANHOLE LIDS TO BE ROTATED OUT OF CURB AND GUTTER, CROSSPANS AND SIDEWALKS. 14. MANHOLE RIM ELEVATION ARE TO BE ADJUSTED TO 14" BELOW FINISHED GRADE IN PAVED AREAS. 15. SEE SHEET DT07 FOR HEADWALL DETAILS AND SHEET GR05 FOR SPOT ELEVATIONS OF HEADWALL. 16. THE NATURAL HABITAT BUFFER ZONE SHALL BE MAINTAINED AS A NATIVE LANDSCAPE PER THE APPROVED LANDSCAPE PLAN. S PROPOSED STORM INLET EASEMENT LINE PROPOSED LOTLINE PROPOSED RIGHT-OF-WAY PROPERTY BOUNDARY PROPOSED CURB & GUTTER EXISTING GAS EXISTING OVER-HEAD ELECTRIC PROPOSED FIBER OPTIC EXISTING STORM SEWER PROPOSED STORM SEWER PROPOSED FIRE HYDRANT PROPOSED RESIDETIAL SERVICE PROPOSED SEWER SERVICE EXISTING SANITARY SEWER PROPOSED SANITARY SEWER EXISTING WATER MAIN PROPOSED WATER MAIN W 8" SS SSSS 8" 4900 4900 PROPOSED CONTOUR EXISTING CONTOUR PROPOSED WATER LINE LOWERING STA: SCALE:H: 1"=V: 1"= toSTORM DRAIN D4.1 220+00.00 220+11.24 50 5 ( IN FEET ) 1 inch = ft. 050 50 50 100 150 1 05/24/18 Updates per Filing 3 JEP INV OUT (24" S)=4912.20 4912.48 REPRESENTS RECORD SURVEY DATA PROVIDED BY NORTHERN ENGINEERING DATED: NOVEMBER 14, 2018 AB 11/26/18 Record Drawing JEP 4934.74 4934.97 4935.90 4935.22 4936.24 4938.39 4933.14 4934.46 4933.12 67.81 LF 0.41% 41.90 LF 0.60% 4934.74 4934.97 4935.90 12.90 LF 2.64% 12.90 LF 2.64% 4934.89 4934.94 4938.23 23.00 LF @ 0.70% 23.00 LF 0.70% 67.81 LF @ 0.41% FL = 4 9 4 5 . 0 0 49 4 5 . 6 4 12/15 Page 5 V. Storm Drain Inlets - FCSCM Vol.1, Ch.6, Sec. 3 A. Construction/Installation: All storm drain inlets have been constructed in accordance with the approved construction plans. 1.The size and type of inlets are consistent with the inlets shown on the approved construction plan. Indicate by writing “Verified” on each inlet on the plan sheet or list on a separate document the inlet number(s), type and size (length). If the inlet installed is other than the one on the approved construction plan detail sheet, provide the name and source of the detail with justification for equal or better capacity. 2.The size of the inlet opening is consistent with the approved detail. (Check height and width.) 3.The elevation of the grate (if applicable) is at the elevation shown on the street profile or as indicated by a spot elevation on the construction plans. 4.The as-built invert elevations of all pipes entering and leaving the inlet are shown on the plan and profile sheets within construction tolerance of 0.2 feet. If substantially different, provide justification and capacity calculations to show the capacity is not affected or propose mitigation. 5.The as-built size of the inlet box is as shown on the construction plans or an explanation or justification is attached. 6.All inlet covers are stenciled or stamped with the following designation: NO DUMPING – DRAINS TO POUDRE RIVER. VI.Culverts - FCSCM Vol.2, Ch.9 A. Construction/Installation: All culverts have been constructed and/or installed in accordance with the approved construction plans. 1.All culvert sizes have been verified as indicated on the as-built construction plans as correct. 2.The culvert material type for all culverts installed is as on the approved construction plans and is indicated on the as-built plans. 3.The as-built invert “in and out” elevations have been verified and are indicated on the as-built construction plans. 4.The culvert headwalls or wing walls have been installed as shown on the approved construction plans. Headwalls or wing walls may be needed in the as-built conditions onsite if the slopes adjacent to the culvert are greater than 4:1. Please note areas needing stabilization in the certification narrative. An alternative to consider is a turf reinforcement mat (TRM). VII.Sub-Drains A. Construction/Installation: All sub-drains shown on the construction plans have been installed in accordance with those plans. Sub-drains installed with the sanitary sewer are to be verified on the sanitary sewer plan and profile sheets of the construction plans. (NOTE: Indicate any sub-drains installed after the plans were approved on the as-built plans.) 1.The size of the sub-drains are as approved on the construction plans and are indicated on the as- built plans. 2.The type of sub-drain, in particular the perforated and non-perforated sections of the drain, are as indicated on the approved construction plans. 12/15 Page 6 3.The cover requirements per the construction plans are provided. 4.The cleanouts have been installed at the locations shown on the construction plans and are accessible for cleaning. (Cleanouts can be buried a maximum of 6 inches deep with their locations marked.) 5.The backfill materials for sub-drains are as shown on the approved construction plans. (This includes the type, depth and width.) 6.The geo-textile liner completely wraps the sub-drain and the permeable backfill material unless shown otherwise on the approved construction plans. (Sub-drain pipe wrapped in a sock filter material is accepted only if approved prior to installation.) VIII.Curb Cuts A. Construction: All curb cut openings are constructed in accordance with the approved construction plans. 1.The size (width) of the curb cut opening is as shown on the approved construction plans. 2.The curb cut openings tie into a downstream swale, pipe, or other appurtenances with a smooth transition and there no obstructions such as riprap or sod impeding the flow downstream of the curb cut. IX.Sidewalk Culverts & Chases A. Construction/Installation: All sidewalk culverts have been installed at the locations shown on the approved construction plans. 1.The size (width and length) of the culverts are as shown on the approved construction plans. 2.The cover plate is a minimum 5/8-inch galvanized plate bolted to a galvanized angle iron per the detail shown on the approved construction plans or per the City’s detail. 3.The sidewalk culvert invert “in and out” elevations have been verified and are indicated on the as-built plans. 4.The sidewalk culvert opening is as shown on the approved construction plans or per the City’s detail. 5.There is a smooth transition both on the inlet and outlet ends of the sidewalk culvert with no obstructions such as riprap or sod impeding the flow into or out of the sidewalk culvert. X. Site Grading A. Construction: All common open spaces have been graded in accordance with the approved construction plans. 1.The grading on all common open spaces bordering private lots has been verified as correct and the as-built rear lot corner elevations have been shown on the as-built plans. 12/15 Page 7 2.The as-built contours for “overlot grading” are shown on the as-built construction plans for all common open spaces, tracts, outlots, etc. If not in compliance, please attach a narrative describing the situation for noncompliance and when it may be corrected. An escrow for overlot grading may be required. (NOTE: Residential Lot Grading Certification is a separate process from this Overall Site Certification. It is understood that residential lots will be brought to final grade once the foundation is backfilled so they may be lower than the plan shows at this Overall Site Certification stage.) 3.All turf reinforcement mats (TRMs) have been installed as shown on the approved construction plans and the slopes are stabilized. XI.Riprap - FCSCM Vol.1, Ch.7, Sec.4.4.4.3 A. Construction: All riprap has been installed in the locations and sizes indicated on the approved construction plans. XII.Permanent Erosion Control Fabric - FCSCM Vol.1, Ch.7 A. Construction: All fabric has been installed in the locations and sizes indicated on the approved construction plans. 1.All fabric was installed per the details on the approved construction plans. XIII.Post-Construction Site Cleanup - FCSCM Vol.3, Ch.7 A. Construction: All construction debris and obstructions of any kind have been removed from drainage paths. 1.All construction debris has been removed except in staging area(s). 2.All ruts have been smoothed out in all construction areas. 3.All areas needing reseeding have been identified and future stabilization goals have been coordinated with the Erosion Control Inspector and in accordance with FCSCM Vol.2 Chapter 12. Note the area needing stabilization in the narrative. XIV.Certification of Other Permanent BMPs - FCSCM Vol.2, Ch.8, Sec.2 & FCSCM Vol.2, Ch.12 A.The construction of channel drop structures is in accordance with the approved plan both in location, horizontal dimensions and cross-section. XV.Certification of LID and Water Quality Facilities - FCSCM Vol.3, Ch.4 A.Attached are the During Construction Inspection Checklist for Low Impact Development (LID) and other items to be verified during construction, along with pictures and other required documentation.