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Home My WebLink AboutLot Certifications - 01/16/2018 (4) FORT COLLINS: 301 North Howes Street, Suite 100, 80521 | 970.221.4158 GREELEY: 820 8 th Street, 80631 | 970.395.9880 | W EB: www.northernengineering.com January 3, 2018 Mr. Shane Boyle City of Fort Collins Stormwater Utility 700 Wood Street Fort Collins, Colorado 80522 RE: Drainage Certification for Jefferson and Linden Restaurant Fort Collins, Colorado Dear Shane: This drainage certification letter is provided to verify as-constructed conditions for Jefferson and Linden Restaurant. Washburn Land Surveying completed survey work December 27, 2017, and Northern Engineering visited the site December 27, 2017, to verify general compliance with the Final Utility Plans for Jefferson and Linden Restaurant, dated 4/28/2017 by Northern Engineering. Included in this drainage certification submittal are the following: Attachment 1 - City of Fort Collins Overall Site and Drainage Certification Form. Attachment 2 - City of Fort Collins During Construction Inspection Checklist and photographs provided by contractor. Attachment 3 - As-constructed record drawings for Grading and Storm Drain Plan and Profile Sheets. Water quality for the site is provided by Stormtech Chambers per the approved utility plans. The checklist for the Stormtech Chambers are included as part of the During Construction Inspection Checklist in Attachment 2. We have concluded, based on the attached information and personal site inspection, that the drainage features for the project site have been constructed in substantial compliance with the above referenced Final Utility Plans, with the following exceptions: • Item I.B: Water quality is being provided by Stormtech Chambers per the approved utility plans. Photographs provided by the contractor of the installation of the Stomtech Chambers are included as a part of Attachment 2. • Item III.B.2: Northern Engineering did not observe construction of the storm sewer. Northern Engineering was unable to verify the encasements and clearances specified on the approved construction plans. • Item III.B.3: Northern Engineering did not observe construction of the storm sewer. Northern Engineering was unable to verify the specific joint types and construction methods. FORT COLLINS: 301 North Howes Street, Suite 100, 80521 | 970.221.4158 GREELEY: 820 8 th Street, 80631 | 970.395.9880 | W EB: www.northernengineering.com • Item VII.A.2: According to the contractor, the subdrain for the Stormtech Chambers was installed per the approved design drawings. Northern Engineering did not observe construction, and Northern Engineering was unable to verify if the perforated and non- perforated sections of the underdrain were constructed per the approved design drawings. • Item VII.A.3: According to the contractor, the Stormtech Chambers and subdrains were installed per the approved design drawings. Northern Engineering did not observe construction, and Northern Engineering was unable to verify if the minimum cover requirements for the Stormtech Chambers and subdrains. • Item VII.A.5: Northern Engineering did not observe construction, and Northern Engineering was unable to verify the backfill materials of the underdrain were constructed per the approved design drawings. • Item XIII.A.1: Construction debris was not removed at the time of Northern Engineering’s site inspection. • Item XIII.A.2: Ruts were not removed at the time of Northern Engineering’s site inspection. The owner was in the process of removing ruts and installing irrigation pipe for the landscaping at the time of Northern Engineering’s site inspection. • Item XIII.A.4: Landscaping was not installed at the time of Northern Engineering’s site inspection. The owner was in the process of installing irrigation pipes for the landscaping at the time of Northern Engineering’s site inspection. Please feel free to contact me with any questions you may have. Thank you, NORTHERN ENGINEERING SERVICES, INC. Frederick S. Wegert, PE Project Engineer 1/3/18 12/15 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. 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. UD UD DS DS DS DS DS DS DS DS DS DS DS DS DS DS TFTF X X X X X X X X X X X X X X X X X X X X X T CONTROL IRR CONTROL IRR CONTROL IRR RR S MW C.O. X X X X X X XX X X 15" S S 15" S S 15" S S 15" S S 4" W 15" S S 15" S S 15" S S 15" S S 15" S S 15" S S 15" S S JEF F E R S O N S T R E E T (70 ' P U B L I C R . O . W . ) LIN D E N S T R E E T (10 0 ' P U B L I C R . O . W . ) BLOCK 7 BLOCK 13 78.36 (79.04 ) PROPOSED WATER QUALITY BASIN TIE TO EXISTING CURB & GUTTER EXISTING ±6" TIMBER WALL 6" SUBDRAIN (SEE SUBGRADE PLAN SHEET C402)(77.74) (78.54) 16' ADDITIONAL ROW 78.5 4 (76.86) (76.67) (78.31) (78.30) 78 . 6 7 78.56 78. 7 0 78 . 3 9 (75. 6 8 ) (75.3 9 ) 78.4 6 78.34 (78.21) (7 7 . 5 3 ) (76.73 ) (7 6 . 3 6 ) (78.28) FFE=78.70 78.51 ELEVATED WOOD DECKING 78.4 0 (78.0 6 ) 8' UTILITY & ACCESS EASEMENT 78.3 5 78.35 78.35 78.35 PROPOSED STORMTECH WATER QUALITY CHAMBERS (SEE SHEET C402) 78. 3 7 78. 5 9 78.62 78.44 12" BARRIER CURB (SEE LANDSCAPE PLANS) 6" PVC ROOF LEADER (TYP.) (SEE DETAIL 307/C502) 78.70 79.26 3.8% 3.7% 2.0% 2.0% 6:1 4:1 4:1 (2.3 % ) (0.4% ) (1.9% ) (3.5 % ) (3. 2 % ) (6.9 % ) (5.3 % ) (4.8 % ) (4.4 % ) (12. 3 % ) 3.5 % 2.0% 9.5% 2.9% 5.3% 1.0% 1.0% 0.7% 1.3% 1.0% 1.9% 8.3% 2.0% 7.6% (0 . 9 % ) (3.4% ) 2.2 % 3. 0 % 78. 6 2 78.70 78.62 78.70 77.62 77.52 77.48 77.44 78.4 2 78.4 2 1.7%1.5% 78.55 78.40 2.0% 78.15 78.43 78.4 3 (4.2%) (2.7%) (1.8%) (76.78) (78. 6 0 ) (78. 0 7 ) (76.24) 1.4 % 1.9% 77.66 78.36 (12 . 8 % ) 3.5% 8.0% 0.7% 78.50 78.3 5 78.35 2.0 % 78.43 78. 6 5 78 . 6 5 78.38 77.9078.2 8 78. 6 4 78.10 78.08 78.17 78. 6 7 78.09 78.73 78.73 78.66 77.51 77.50 77.36 77 . 2 2 78.51 78.51 78.73 78.4478.46 78.50 78.40 78.38 78.4 0 78.40 78.4 1 75.24 76 . 3 8 76.26 76.48 78.4 7 78.57 78.53 77.66 78.52 78. 6 9 78.58 78.36 76.62 76.98 78.48 78.08 78.20 78.88 78.3 9 78.3 9 79.23 78.73 78 . 4 1 78.18 2' WIDE CONCRETE PAN WITH FL @ 1.3% ////////////////////////////////// No . Re v i s i o n s : By : Da t e : RE V I E W E D B Y : N. H a w s DE S I G N E D B Y : DR A W N B Y : SC A L E : PR O J E C T : 83 8 - 0 1 4 Sheet JE F F E R S O N A N D L I N D E N R E S T A U R A N T E N G I N E E R N G I E H T R O N R N 30 1 N o r t h H o w e s S t r e e t , S u i t e 1 0 0 Fo r t C o l l i n s , C o l o r a d o 8 0 5 2 1 ww w . n o r t h e r n e n g i n e e r i n g . c o m Ph o n e : 9 7 0 . 2 2 1 . 4 1 5 8 DA T E : AP R I L 2 8 , 2 0 1 7 of 16 04.28.17 C400 GR A D I N G P L A N N. H a w s A. B o e s e 1" = 2 0 ' ( IN FEET ) 0 1 INCH = 20 FEET 20 20 40 60 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 Know what's below. before you dig.Call R NORTH LEGEND: 5013 PROPOSED CONTOUR 93 EXISTING CONTOUR PROJECT BOUNDARY PROPOSED SPOT ELEVATION 33.43 PROPOSED SLOPES 1.THE SIZE, TYPE AND LOCATION OF ALL KNOWN UNDERGROUND UTILITIES ARE APPROXIMATE WHEN SHOWN ON THESE DRAWINGS. IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR TO VERIFY THE EXISTENCE OF ALL UNDERGROUND UTILITIES IN THE AREA OF THE WORK. BEFORE COMMENCING NEW CONSTRUCTION, THE CONTRACTOR SHALL BE RESPONSIBLE FOR LOCATING ALL UNDERGROUND UTILITIES AND SHALL BE RESPONSIBLE FOR FOR ALL UNKNOWN UNDERGROUND UTILITIES. 2.REFER TO THE PLAT FOR LOT AREAS, TRACT SIZES, EASEMENTS, LOT DIMENSIONS, UTILITY EASEMENTS, OTHER EASEMENTS, AND OTHER SURVEY INFORMATION. 3.ALL PROJECT DATA IS ON THE CITY OF FORT COLLINS VERTICAL DATUM; NAVD88. SEE COVER SHEET FOR BENCHMARK REFERENCES. 4.ALL SPOT ELEVATIONS ARE FINISHED GRADE ELEVATIONS UNLESS OTHERWISE NOTED. 5.ADD 4900-FT TO PROPOSED CONTOURS, SPOT ELEVATIONS, AND FFE LABELS, WHERE TRUNCATED. 6.THE TOP OF FOUNDATION ELEVATIONS SHOWN ARE THE MINIMUM ELEVATIONS REQUIRED FOR PROTECTION FROM THE 100-YEAR STORM. 7.PLEASE REFER TO THE EROSION CONTROL PLAN SHEETS AND REPORT FOR TEMPORARY CONTROL MEASURES AND CONSTRUCTION SEQUENCEING IN ORDER TO PREVENT LOADING OF THE LID DRAINAGE FACILITY WITH SEDIMENT DURING CONSTRUCTION. 8.CONTRACTOR SHALL CONFIRM AND COORDINATE WITH STAMPED ARCHITECTURAL AND LANDSCAPE ARCHITECTURE DRAWINGS FOR ALL STEPS, RAMPS, LANDSCAPING WALLS, SEATWALLS, AND PLANTERS. 9.CONTRACTOR SHALL CONFIRM AND COORDINATE WITH STAMPED STRUCTURAL DRAWINGS FOR ELEVATIONS AND GRADE CONDITIONS ALONG BUILDING PERIMETER. NOTIFY OWNER, ARCHITECT, AND ENGINEER(S) OF ANY DISCREPANCIES PRIOR TO MOBILIZATION. NOTES: 2.0% (47.45 ) EXISTING SPOT ELEVATION PROPOSED CURB & GUTTER PROPOSED STORM DRAIN EXISTING STORM DRAIN PROPOSED UNDERDRAIN UD EXISTING SLOPES (2.0%) 6 1 GR A D I N G R E V I S I O N S AL B 09 / 1 3 / 1 7 1 2 GR A D I N G & D R A I N A G E R E C O R D D R A W I N G S FS W 01 / 0 3 / 1 8 THESE RECORD DRAWINGS, PRODUCED BY NORTHERN ENGINEERING SERVICES, INC., ARE BASED IN WHOLE, OR IN PART, UPON INFORMATION PROVIDED BY OTHERS. NORTHERN ENGINEERING SERVICES, INC. ASSUMES NO LIABILITY FOR THE ACCURACY OR COMPLETENESS OF THIS INFORMATION. RECORD DRAWING 2 DS DS DS DS DS DS TFTF X X X X X X X X X X X X X X X X X X X X X X X X X X MW C.O . XXXXXXXXXXXXXXX X X X X 6" W 78.36 (79.04 ) (78.54) 78.5 4 (78.31) (78.30) 78 . 6 7 (78.21) (78.28) 78. 3 5 78. 3 7 78. 5 9 79.17 79.26 2.0% 2.0% (2 . 3 % ) (5 . 3 % ) (4 . 8 % ) (4 . 4 % ) 2.0% 9.5% 77. 7 9 77. 7 3 77. 7 3 78.70 78.70 78.70 78.24 78.29 78.26 78.67 77. 8 3 77. 8 6 (78.66) 79.24 78.74 78.76 78.77 78.72 0" TO EXISTING ±6" CURB TRANSITION COLUMN FOUNDATION (SEE PLANS BY OTHERS) 0" TO EXISTING ±6" CURB TRANSITION CRUSHER FINES TRAIL (78.33) (78.17) (78.27) (78.25) (78.22) (78.17)(78.17) 78.40 78.72 79.01 79.17 2.0% 78.15 MATCH EXISTING 78.56 MATCH EXISTING (78. 6 0 ) (78. 0 7 ) 78.37 78.37 (78.16) 78.56 79.16 78.67 79.26 78.69 78.70 78.74 (78. 5 3 ) (78. 9 0 ) 79.23 78.6 8 79.0 879.1 7 1' CURB CUT 79.23 78.3 9 78.89 78.20 78.08 78.17 78.08 78.10 78. 6 4 78.2 8 77.90 78 . 6 5 78. 6 5 78.43 79.28 78.79 79.35 79.29 79.29 78.3 9 78.40 78.47 78.50 78.35 78.50 78.79 78.80 78.92 78.50 78.81 78.50 78.93 78.81 78.54 78.45 78.3 6 78.7378.68 78.68 78.3178.17 78. 3 9 78.38 78.50 78.17 78. 1 2 78. 6 3 78. 0 3 77. 8 7 77. 7 4 78.22 78.17 78.27 78.30 1.2%1.5% 2' WIDE CONCRETE PAN WITH FL @ 1.3% ///////////////////////////////////////////////////////////////////// UD UD UD UD UD DS DS DS DS DS DS DS DS X X X X X X X X X X X X X X X X T CON T R O L IRR CON T R O L IRR CON T R O L IRR S X X X 6" W LI N D E N S T R E E T (1 0 0 ' P U B L I C R . O . W . ) (77.74) (76.86) (76.67) (75.2 8 ) 78.56 78. 7 0 78 . 3 9 (75. 6 8 ) (75.3 9 ) 78.4 6 78.34 (7 7 . 5 3 ) (7 7 . 0 8 ) (76.73 ) (7 6 . 3 6 ) FFE=78.70 78.51 78.4 0 (78.06 ) 78.3 5 78.35 78.35 78.35 78. 3 5 78.35 78.62 78.57 78.4478.70 3. 8 % 3. 7 % 6:1 4:1 4:1 (0.4%) (3 . 2 % ) (6 . 9 % ) (1 2 . 3 % ) 3.5 % 2.9 % 5. 3 % 1. 0 % 1. 0 % 0. 7 % 1. 3 % 1.0% 1.9% 8. 3 % 2. 0 % 7. 6 % (0.9% ) 2.2 %3.0% 78. 6 2 78.70 78.62 78.70 77.62 77.52 77.48 77.44 77.56 77.60 77.66 78.17 77.61 76.83 78.29 78.22 78.50 78.0178.08 77.81 78.42 78.37 78.43 78.4 3 77.8 1 78.4 2 78.4 2 78.3 7 77.7 3 77.7 3 77.7 3 77.7 3 77.8 3 77.8 4 78.43 78.35 78.3578.35 78.43 1.0%0.8%1.1%1.0% 1.0%1.0%0.9%1.0% 78.35 78.34 78.3 5 1. 0 % 1. 0 % 78.35 77.9 0 77.90FG (7 7 . 6 2 ) (77.1 5 ) (77.0 5 ) 78.41 78.39 78.40 (77. 1 7 ) (77.01 ) 77.9 0 78.40 78.43 78.51 78.4 5 1. 1 % 1. 0 % 0. 9 % 1. 0 % 10 ' D R A I N A G E EA S E M E N T SEE NOTE 6 77.74 1.7% 1.5 % 77.70 FG (7 7 . 2 4 ) 77 . 5 4 FG 78.4 378.48 78.58 77.5 7 FG 78.40 FG 77 . 8 4 FG 78.40 (78.15) (78.07) 78.5 978.3 3 78.1 5 78.1 9 78.70 78.70 78.5378.70 78.2 2 78.55 78.3 7 78.37 77.81 (78.07) (77.96) 78. 5 6 77.78 FG 77.90 FG 77 . 5 1 FG 78.43 78.4 3 (4 . 2 % ) (2.7% ) (1.8% ) (76.78) (76.24) 76.46 (76 . 3 0 ) (76 . 3 3 ) (76 . 3 9 ) (76.04) 78.2 7 78.3 9 78.7 0 1.4% 1.9% (77 . 6 9 ) SEAT WALL (SEE LANDSCAPE PLANS) 12" BARRIER CURB (SEE LANDSCAPE PLANS) THICKENED CONCRETE EDGE (TYP.) SEE DETAIL 109/C500 THICKENED CONCRETE EDGE (TYP.) SEE DETAIL 109/C500 77.73 78.54 THICKENED CONCRETE EDGE (TYP.) SEE DETAIL 109/C500 78. 1 5 TB C 77.9 5TBC 78.14 TBC 77.4 9 FG 77.66 78.36 76.7 8 76.7 6 76.8 5 0.3%0.3% 0.3% 10" CURB HEIGHT (NON-STANDARD) EXISTING ±6" TO 10" CURB TRANSITION 10" TO EXISTING ±6" CURB TRANSITION 77.9 0 77.9077.90 (1 2 . 8 % ) 77.4 6 76.8 5 76.85 76.90 77.37 77.79 SITE WALL SITE WALL 78 . 2 2 78.50 78.50 3. 5 % 8. 0 % THICKENED CONCRETE EDGE (TYP.) SEE DETAIL 109/C500 78.3 7 78.37 0.7% 78.50 78.2 2 77.87 77.87 78.3 5 78.35 77.87 77.87 78.41 77.80 77.77 77.75 78.2 0 2.0 % 78.73 78.48 76.98 76.62 78.36 78.58 78. 6 9 78.52 77.66 78.53 78.57 78.4 7 76.48 76.26 76 . 3 8 75.24 78.4 1 78.40 78.4 0 78.38 78.40 78.47 78.44 78.73 78.51 77 . 2 2 77.36 77.50 77.51 78.7378.73 78.09 78. 6 7 78.66 77.95 77.50 77.45 78.57 78.51 78.51 78.44 78.12 78.50 77.80 78.43 78.40 78.46 77 . 5 4 77.96 77.95 78.49 77.57 77 . 5 7 76 . 7 9 77.9 4 77.51 77.51 78 . 4 1 78.43 77.32 78.56 78.5478.51 77.98 78.18 77.74 77.60 77.73 78.1 8 78.59 78.57 78.69 78.65 78.47 78.42 78.43 78.4 3 78.47 78.47 77.7678.38 77.72 78.39 78.3 8 78.36 78.43 78.4 1 78. 3 9 78.41 77.73 77.81 78.43 78.47 77.74 78.39 78.44 78.16 78.26 78.40 78.28 78.18 78.6378.31 78.73 78.30 78.36 78.29 78.18 PAN W I T H F L @ 1 . 3 % No . Re v i s i o n s : By : Da t e : RE V I E W E D B Y : N. H a w s DE S I G N E D B Y : DR A W N B Y : SC A L E : PR O J E C T : 83 8 - 0 1 4 Sheet JE F F E R S O N A N D L I N D E N R E S T A U R A N T E N G I N E E R N G I E H T R O N R N 30 1 N o r t h H o w e s S t r e e t , S u i t e 1 0 0 Fo r t C o l l i n s , C o l o r a d o 8 0 5 2 1 ww w . n o r t h e r n e n g i n e e r i n g . c o m Ph o n e : 9 7 0 . 2 2 1 . 4 1 5 8 DA T E : AP R I L 2 8 , 2 0 1 7 of 16 04.28.17 C401 DE T A I L E D G R A D I N G P L A N A. R e e s e A. B o e s e 1" = 1 0 ' ( IN FEET ) 010 10 20 30 1 INCH = 10 FEET 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 Know what's below. before you dig.Call R NORTH LEGEND: 5013 PROPOSED CONTOUR 93 EXISTING CONTOUR PROJECT BOUNDARY PROPOSED SPOT ELEVATION 33.43 PROPOSED SLOPES 1.THE SIZE, TYPE AND LOCATION OF ALL KNOWN UNDERGROUND UTILITIES ARE APPROXIMATE WHEN SHOWN ON THESE DRAWINGS. IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR TO VERIFY THE EXISTENCE OF ALL UNDERGROUND UTILITIES IN THE AREA OF THE WORK. BEFORE COMMENCING NEW CONSTRUCTION, THE CONTRACTOR SHALL BE RESPONSIBLE FOR LOCATING ALL UNDERGROUND UTILITIES AND SHALL BE RESPONSIBLE FOR FOR ALL UNKNOWN UNDERGROUND UTILITIES. 2.REFER TO THE PLAT FOR LOT AREAS, TRACT SIZES, EASEMENTS, LOT DIMENSIONS, UTILITY EASEMENTS, OTHER EASEMENTS, AND OTHER SURVEY INFORMATION. 3.ALL PROJECT DATA IS ON THE CITY OF FORT COLLINS VERTICAL DATUM; NAVD88. SEE COVER SHEET FOR BENCHMARK REFERENCES. 4.ALL SPOT ELEVATIONS ARE FINISHED GRADE ELEVATIONS UNLESS OTHERWISE NOTED. 5.ADD 4900-FT TO PROPOSED CONTOURS, SPOT ELEVATIONS, AND FFE LABELS, WHERE TRUNCATED. 6.THE TOP OF FOUNDATION ELEVATIONS SHOWN ARE THE MINIMUM ELEVATIONS REQUIRED FOR PROTECTION FROM THE 100-YEAR STORM. 7.PLEASE REFER TO THE EROSION CONTROL PLAN SHEETS AND REPORT FOR TEMPORARY CONTROL MEASURES AND CONSTRUCTION SEQUENCEING IN ORDER TO PREVENT LOADING OF THE LID DRAINAGE FACILITY WITH SEDIMENT DURING CONSTRUCTION. 8.CONTRACTOR SHALL CONFIRM AND COORDINATE WITH STAMPED ARCHITECTURAL AND LANDSCAPE ARCHITECTURE DRAWINGS FOR ALL STEPS, RAMPS, LANDSCAPING WALLS, SEATWALLS, AND PLANTERS. 9.CONTRACTOR SHALL CONFIRM AND COORDINATE WITH STAMPED STRUCTURAL DRAWINGS FOR ELEVATIONS AND GRADE CONDITIONS ALONG BUILDING PERIMETER. NOTIFY OWNER, ARCHITECT, AND ENGINEER(S) OF ANY DISCREPANCIES PRIOR TO MOBILIZATION. NOTES: 2.0% (47.45 ) EXISTING SPOT ELEVATION PROPOSED CURB & GUTTER PROPOSED STORM DRAIN EXISTING STORM DRAIN PROPOSED UNDERDRAIN UD EXISTING SLOPES (2.0%) 7 MA T C H L I N E - S E E L O W E R L E F T MA T C H L I N E - S E E U P P E R R I G H T 1 GR A D I N G R E V I S I O N S AL B 07 / 1 3 / 1 7 1 1 1 2 GR A D I N G & D R A I N A G E R E C O R D D R A W I N G S FS W 01 / 0 3 / 1 8 THESE RECORD DRAWINGS, PRODUCED BY NORTHERN ENGINEERING SERVICES, INC., ARE BASED IN WHOLE, OR IN PART, UPON INFORMATION PROVIDED BY OTHERS. NORTHERN ENGINEERING SERVICES, INC. ASSUMES NO LIABILITY FOR THE ACCURACY OR COMPLETENESS OF THIS INFORMATION. RECORD DRAWING 2 2 2 2 2 2 2 2 VAU L T ELE C VAU L T ELE C T CON T R O L IRR CON T R O L IRR CON T R O L IRR VAU L T ELE C VAU L T ELE C HYD ELE C ELE C VAU L T ELE C TRA F F I C VAU L T TRA F F I C VAU L T TRA F F I C VAU L T S X X X 10 " W 10 " W 10 " W 10 " W 10 " W 10 " W 10 " W 10 " W 10 " W 10 " W 10 " W 6" W 6" SS 6" SS 6" SS 6" SS 6" SS 6" SS 6" SS 16" W 16" W 16" W 16" W 16" W 16" W 16" W 16" W 16" W 16" W 16" W 16" W 16" W 16" W 16" W 16" W 16" W 16" W 16" W 16" W 16" W E E E E E E E E E E E E E E E E E E E E E X X X X X X X X X X X X X X X X X X X X X X JEFFERSON STREET (70' PUBLIC R.O.W.) LI N D E N S T R E E T (1 0 0 ' P U B L I C R . O . W . ) UD UD UD UD UD DS DS DS DS DS DS DS DS DS DS DS DS DS DS 74.70 SUB 2.94 LF 15" PVC @ 0.20%78.5 8 EXISTING 6' WALK 74.69SUB 74.79 SUB 74.80 SUB 78.42 78.50 78 . 7 1 0. 2 % 14.76 LF 6" PVC @ 0.50% 4.64 LF 6" PVC @ 0.50% 0. 2 % 27.05 LF 6" PVC @ 0.50% 17.80 LF 6" PVC @ 0.50% 29.39 LF 6" PVC @ 0.50% 16.91 LF 6" PVC @ 0.50% 2.88 LF 6" PVC @ 0.20% 9.71 LF 6" PVC @ 0.50% 11.79 LF 6" PVC @ 1.27% 19.48 LF 6" PVC @ 0.50% 19.05 LF 6" PVC @ 0.50% 19.04 LF 6" PVC @ 0.50% 19.01 LF 6" PVC @ 0.5 0 % 19.05 LF 6" PVC @ 0.50% 19.01 LF 6" PVC @ 0.50% 28 . 5 8 L F 1 5 " P V C @ 0 . 2 0 % CORE & GROUT CONNECTION TO EX INLET A STA 10+00.00 INV. IN=4974.72 (NE) N: 131806.45 E: 195522.48 MONITORING WELL A1-W3 INV. OUT=4974.88 (SE) GRATE=4978.48 WATER QUALITY BASIN 1B STA 10+31.53 N: 131833.70 E: 195538.34 6"x6" TEE w/ 12"x6" REDUCER 1B-N3 INV. IN=4975.37 (NE) INV. IN=4975.37 (NW) INV. OUT=4975.37 (SE) 90° BEND 1B-N4 INV. IN=4975.43 (SW) INV. OUT=4975.43 (SE) 12"X6" TEE 1B-N2 INV. IN=4975.27 (NE) INV. IN=4975.27 (NW) INV. OUT=4975.27 (SE) DRAIN BASIN 1B-N2.1 INV. IN=4975.29 (NE) INV. OUT=4975.29 (SW) GRATE=4977.73 90° BEND 1B-N5 INV. IN=4975.51 (NW) INV. OUT=4975.51 (NE) FG=4976.05 6"x6" TEE 1B-N7 INV. IN=4975.68 (NW) INV. IN=4975.68 (NE) INV. OUT=4975.68 (SE) FG=4978.33 6"x6" TEE 1B-N9 INV. IN=4975.86 (NW) INV. IN=4975.86 (NE) INV. OUT=4975.86 (SE) FG=4978.19 6"x6" TEE 1B-N10 INV. IN=4976.01 (NW) INV. IN=4976.01 (NE) INV. OUT=4976.01 (SE) FG=4978.26 6"x6" TEE 1B-N11 INV. IN=4976.09 (NE) INV. IN=4976.09 (NW) INV. OUT=4976.09 (SE) FG=4978.29 6"x6" TEE 1B-N3.3 INV. IN=4975.56 (N) INV. IN=4975.56 (E) INV. OUT=4975.56 (W) FG=4976.10 45° BEND 1B-N3.5 INV. IN=4975.77 (NW) INV. OUT=4975.77 (S) FG=4976.31 DRAIN BASIN 1B-N3.6 INV. IN=4975.92 (NW) INV. IN=4975.92 (SW) INV. OUT=4975.92 (SE) FG=4977.44 DRAIN BASIN 1B-N3.7 INV. IN=4976.01 (NW) INV. IN=4976.01 (SW) INV. OUT=4976.01 (SE) GRATE=4977.48 DRAIN BASIN 1B-N3.8 INV. IN=4976.11 (NW) INV. IN=4976.11 (SW) INV. OUT=4976.11 (SE) GRATE=4977.52 DRAIN BASIN 1B-N3.9 INV. IN=4976.20 (NW) INV. IN=4976.20 (SW) INV. OUT=4976.20 (SE) GRATE=4977.62 DRAIN BASIN 1B-N3.10 INV. IN=4976.30 (NW) INV. IN=4976.30 (SW) INV. OUT=4976.30 (SE) GRATE=4977.73 DRAIN BASIN 1B-N3.11 INV. IN=4976.39 (NW) INV. IN=4976.39 (SW) INV. OUT=4976.39 (SE) GRATE=4977.73 DRAIN BASIN 1B-N3.12 INV. IN=4976.49 (SW) INV. OUT=4976.49 (SE) GRATE=4977.79 ECCENTRIC CONNECTION 1A STA 10+28.58 N: 131831.15 E: 195536.86 4.63 LF 6" PVC @ 0.50% DRAIN BASIN 1B-N12 INV. IN=4976.20 (NE) INV. OUT=4976.20 (SE) GRATE=4978.15 21.10 LF 6" PVC @ 0.50% 8.50 LF 6" PVC @ 0.50% 6"x6" TEE 1B-N8 INV. IN=4975.77 (NW) INV. IN=4975.77 (NE) INV. OUT=4975.77 (SE) FG=4978.15 17.77 LF 6" PVC @ 0.50% 6"x6" TEE 1B-N6 INV. IN=4975.64 (NW) INV. IN=4975.64 (NE) INV. OUT=4975.64 (SE) FG=4978.59 20.03 LF 6" PVC @ 0.50% DRAIN BASIN 1B-N2.2 INV. OUT=4975.39 (SW) GRATE=4977.73 DRAIN BASIN 1B-N3.1 INV. IN=4975.39 (NE) INV. OUT=4975.39 (SW) GRATE=4977.73 20 . 0 1 L F 6 " P V C @ 0 . 7 2 % DRAIN BASIN 1B-N3.2 INV. IN=4975.54 (E) INV. OUT=4975.54 (SW) GRATE=4977.73 4.81 LF 6" PVC @ 0.50% 90° BEND 1B-N1 INV. IN=4975.14 (NW) INV. OUT=4975.14 (SW) FG=4975.86 3.56 LF 12" PVC @ 0.50% 26.18 LF 12" PVC @ 0.50% 20.40 LF 12" PVC @ 0.50% 12.13 LF 6" PVC @ 0.50% 11.9 6 L F 6" P V C@ 1.3 1 % DRAIN BASIN 1B-N3.4 INV. IN=4975.61 (N) INV. OUT=4975.61 (S) GRATE=4977.74 48.28 LF 6" PERF. PVC @ 0.20% 6" PVC ROOF LEADER (TYP.) (SEE DETAIL 301/C502) 6" PVC ROOF LEADER (TYP.) (SEE DETAIL 301/C502) AREA OF POTENTIAL CONFLICT (SEE NOTE 13) 20.69 LF 6" PVC @ 0.50% INLINE DRAIN BASIN 1B-N3.3A INV. OUT=4975.66 (W) FG=4977.73 PROVIDE PVC LINER ALONG SOUTHERN EDGE OF VAULT SYSTEM 2' WIDE CONCRETE PAN WITH FL @ 1.3% ///////////////////////////////////////////////////////////////////// 4960 4965 4970 4975 4980 4985 4990 4960 4965 4970 4975 4980 4985 4990 9+50 10+00 11+00 EX I N L E T A ST A 1 0 + 0 0 . 0 0 FL . E L 4 9 7 6 . 7 ± IN V . I N 4 9 7 4 . 7 2 ( N E ) 2.94 LF 15" PVC @ 0.20% WA T E R Q U A L I T Y B A S I N 1 B ST A 1 0 + 3 1 . 5 3 RI M 4 9 7 8 . 5 ± IN V . I N 4 9 7 5 . 1 2 ( N W ) IN V . I N 4 9 7 5 . 1 2 ( N E ) IN V . O U T 4 9 7 4 . 7 8 ( S W ) EXISTING GROUND PROPOSED GROUND (S E E S T O R M T E C H D E S I G N B Y AD S F O R C O N T I N U A T I O N O F ST O R M A A N D A D D I T I O N A L IN F O R M A T I O N ) EC C E N T R I C C O N N E C T I O N 1 A ST A 1 0 + 2 8 . 5 8 IN V . I N 4 9 7 4 . 7 8 ( N E ) IN V . I N 4 9 7 4 . 7 8 ( N W ) IN V . O U T 4 9 7 4 . 7 8 ( S W ) 28.58 LF 15" PVC @ 0.20% No . Re v i s i o n s : By : Da t e : RE V I E W E D B Y : N. H a w s DE S I G N E D B Y : DR A W N B Y : SC A L E : PR O J E C T : 83 8 - 0 1 4 Sheet JE F F E R S O N A N D L I N D E N R E S T A U R A N T E N G I N E E R N G I E H T R O N R N 30 1 N o r t h H o w e s S t r e e t , S u i t e 1 0 0 Fo r t C o l l i n s , C o l o r a d o 8 0 5 2 1 ww w . n o r t h e r n e n g i n e e r i n g . c o m Ph o n e : 9 7 0 . 2 2 1 . 4 1 5 8 DA T E : AP R I L 2 8 , 2 0 1 7 of 16 04.28.17 C402 PL A N & P R O F I L E SU B G R A D E P L A N & S T O R M L I N E A A. R e e s e A. B o e s e 1" = 1 0 ' ( IN FEET ) 010 10 20 30 1 INCH = 10 FEET NORTH LEGEND: PROPOSED SUBGRADE SPOT ELEVATION 33.43 PROPOSED SUBGRADE SLOPES 2.0% EXISTING SPOT ELEVATION PROPOSED FINISHED GRADE SPOT ELEVATION 33.43 (33.43) SUB 8 BASE COURSE CONCRETE PAVEMENT SUB-BASE COURSE STORMTECH SC-310 CHAMBER NOT TO SCALE TYPICAL STORMTECH SC-310 DETENTION CHAMBER NOTE: 1.CONTRACTOR TO PROVIDE GEOTEXTILE FABRIC ON BOTTOM AND SIDES OF ALL CHAMBER DETENTION AREAS. 2.FINAL DESIGN AND LAYOUT OF STORMTECH CHAMBERS BY OTHERS. 6" SLOTTED PVC UNDERDRAIN 6" (MIN.) \A1;6" (MIN.) 16" MIN. VARIES (44" MIN.) 6" 16" VARIES (6" MIN.) STORM DRAIN LINE A PROFILE SCALE: VERT. 1"=5' HORIZ. 1"=50' EXISTING RIGHT OF WAY EXISTING WATER MAIN PROPOSED STORM DRAIN NOTES: THE SIZE, TYPE AND LOCATION OF ALL KNOWN UNDERGROUND UTILITIES ARE APPROXIMATE WHEN SHOWN ON THESE DRAWINGS. IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR TO VERIFY THE EXISTENCE OF ALL UNDERGROUND UTILITIES IN THE AREA OF THE WORK. BEFORE COMMENCING NEW CONSTRUCTION, THE CONTRACTOR SHALL BE RESPONSIBLE FOR LOCATING ALL UNDERGROUND UTILITIES AND SHALL BE RESPONSIBLE FOR ALL UNKNOWN UNDERGROUND UTILITIES. CONTRACTOR SHALL BE RESPONSIBLE FOR ANY NECESSARY FIELD LOCATES AND POTHOLING OF SUBSURFACE UTILITIES. ENGINEERING AND CITY SHALL BE NOTIFIED OF ANY POTENTIAL CONFLICTS. 3.MAINTAIN 10' HORIZONTAL AND 18" VERTICAL MINIMUM SEPARATION BETWEEN ALL SANITARY SEWER MAINS, WATER MAINS, AND SERVICES. 4.PIPE LENGTHS ARE CALCULATED FROM THE CENTER OF MANHOLES AND INLET BOX STRUCTURES. SPECIFIED LENGTH OF PIPE INCLUDES THE LAYING LENGTH OF FLARED END SECTIONS. 5.PRIVATE STORM SEWER MATERIAL MAY BE RCP, PVC OR HDPE. ALL 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. HDPE MUST BE SMOOTH WALLED INTERIOR. HDPE FITTINGS MAY BE USED FOR PVC INSTALLATIONS. ALL JOINTS SHALL BE 'WATERTIGHT' USING APPROPRIATE GASKETS OR JOINT WRAPS (PER ASTM C443 FOR RCP AND PER ASTM F477 / D3212 FOR PLASTIC PIPE). 6.REFER TO SHEET C504 FOR WATER QUALITY STRUCTURE DETAILS. 7.CONTRACTOR SHALL NOTIFY THE DESIGN ENGINEER AND THE CITY OF FORT COLLINS STORMWATER UTILITY A MINIMUM OF ONE WEEK IN ADVANCE SO AS TO ALLOW FOR FIELD OBSERVATION AND DOCUMENTATION OF THE FOLLOWING SYSTEM ITEMS IN THE PERMEABLE PAVER AREA: -SUBGRADE -INSTALLATION OF GEOTEXTILE FABRIC -INSTALLATION OF UNDERDRAIN -PLACEMENT AND COMPACTION OF FOUNDATION STONE -PLACEMENT OF CHAMBERS AND EMBEDMENT STONE 8.SUBGRADE AREAS ARE TO BE FIELD SURVEYED BY A LICENSED PROFESSIONAL. THE DESIGN ENGINEER MUST CONFIRM THE SUBGRADE ELEVATIONS AND DIMENSIONS PRIOR TO PLACEMENT OF GEOTEXTILE FABRIC, SUB-BASE, OR ANY OTHER MATERIAL. 9.THE CONTRACTOR SHALL, AT ALL TIMES DURING AND AFTER SYSTEM INSTALLATION, PREVENT SEDIMENT, DEBRIS, AND DIRT FROM ANY SOURCE FROM ENTERING THE CHAMBER SYSTEM. 10.GENERAL CONTRACTOR SHALL CONVENE A PRE-CONSTRUCTION MEETING TO ENSURE THAT ALL SUBCONTRACTORS HAVE AN UNDERSTANDING OF HOW THE VAULT SYSTEM IS INTENDED TO FUNCTION. CONTRACTOR SHOULD DISCUSS THE PROPOSED SEQUENCE OF CONSTRUCTION AND IDENTIFY ACTIVITIES THAT MAY REQUIRE PROTECTION OF THE SYSTEM. 11.THE CONTRACTOR SHOULD PROVIDE SLACK IN GEOTEXTILE FABRIC TO ENSURE PROPER INSTALLATION AND AGGREGATE PLACEMENT WITHOUT DAMAGE. PROVIDE SUFFICIENT SLACK SO THE FABRIC IS NOT TORN WHEN ROCK IS PLACED. IF TEARS ARE SEEN OR DISCOVERED, REPAIR THEM AS RECOMMENDED BY MANUFACTURER WITH NO LESS THAN 18 INCHES OF OVERLAP ON ALL SIDES OF THE TEAR. 12.SEE SHEETS C503-C504 AND PLANS BY ADS FOR ADDITIONAL DESIGN INFORMATION. 13.CONTRACTOR SHALL COORDINATE ANY NECESSARY TELEPHONE, CABLE AND ELECTRIC LOWERINGS (OR RE-ROUTING) WITH THE RESPECTIVE UTILITY PROVIDERS TO FACILITATE THE INSTALLATION OF THE PROPOSED STORM DRAIN AND UTILITY SERVICES. 14.VAULT LAYOUT SHOWN IN THESE PLANS IS FOR REFERENCE ONLY. FINAL VAULT LAYOUT AND DESIGN SHALL BE PER MANUFACTURER. CURRENT DESIGN AND SPECIFICATIONS PROVIDED BY ADS (ADS PROJECT #176511). 15.PLEASE REFER TO THE EROSION CONTROL PLAN SHEETS AND REPORT FOR TEMPORARY CONTROL MEASURES AND CONSTRUCTION SEQUENCEING IN ORDER TO PREVENT LOADING OF THE LID DRAINAGE FACILITY WITH SEDIMENT DURING CONSTRUCTION. 16.CONTRACTOR TO COORDINATE ALL ROOF LEADERS WITH THE ARCHITECTURAL AND PLUMBING PLANS PRIOR TO CONSTRUCTION OR ORDERING OF MATERIAL. IF A CONFLICT EXISTS, CONTRACTOR TO CONTACT THE ENGINEER. W G T E EXISTING STORM DRAIN EXISTING ELECTRIC EXISTING TELEPHONE EXISTING GAS S W PROPOSED SEWER SERVICE EXISTING SANITARY SEWER SS PROPOSED CURB & GUTTER PROPOSED WATER SERVICE W/ CURB STOP EASEMENT LINE PROJECT BOUNDARY PROPOSED UNDERDRAIN UD PROPOSED AREA DRAIN INLET 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 Know what's below. before you dig.Call R 1 ST O R M A , S U B D R A I N I N V E R T S & C O N N E C T I O N AL B 06 / 1 2 / 1 7 1 1 1 2 RE V I S E D G R A T E E L E V A T I O N S AL B 09 / 1 3 / 1 7 2 2 2 2 22222 2 77.6376.36 78.0976.2276.2776.27 77.5176.1276.1276.12 77.5076.0576.0576.05 GRATE=4977.3675.9775.9775.97 77.8075.8075.60 77.51 75.73 75.5975.6077.74 75.5075.5077.76 75.47 77.72 75.3275.32 74 . 6 6 76 . 6 2 78.49 74.94 18.8 19.1 19.6 19.7 20.7 5.0 0.54% 0.54% 75.6275.6275.62 9.5 1.9% 12.1 11.9 1.5% 1.5% 75.8075.80 0.4%0.4% 20 . 1 20.3 0.7%0. 5 % 3 GR A D I N G & D R A I N A G E R E C O R D D R A W I N G S FS W 01 / 0 3 / 1 8 THESE RECORD DRAWINGS, PRODUCED BY NORTHERN ENGINEERING SERVICES, INC., ARE BASED IN WHOLE, OR IN PART, UPON INFORMATION PROVIDED BY OTHERS. NORTHERN ENGINEERING SERVICES, INC. ASSUMES NO LIABILITY FOR THE ACCURACY OR COMPLETENESS OF THIS INFORMATION. RECORD DRAWING 76.2177.98 76.21 74 . 8 0 75 . 1 8 75 . 1 8 0.4%0.4% 74 . 7 9 74 . 7 9 74 . 7 9 0.4 % 0.4% 75.1975.19 75.3075.3075.3075.4075.4075.40 75.4675.46 75.5375.5375.6675.6675.6675.7975.7975.79 75.7075.7075.7075.8875.8875.8876.0276.0276.02 76.1076.1076.10 0.4% 0.4% 0.4% 2.2% 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 UNLESS SPECIFIED, ALL INLETS ARE VERIFIEDAS INSTALLED PER THE APPROVED DESIGNDRAWINGS. INLET NOT INSTALLED INLET NOT INSTALLED