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Home My WebLink AboutLot Certifications - 08/28/2015n PP a �S oo MERRICK° 0011 & COMPANY August 18, 2015 Mr. Dan Mogen City of Fort Collins Storm Water Utility 700 Wood Street Fort Collins, CO 80521 _-Re: -Grading and -Drainage Certification for the Landings HOA Pool House Renovation Dear Mr. Mogen, - - - We are - submitting for your review and approval an overall site certification of the constructed drainage facilities for the Landings Pool House renovation project. The construction of the ADA compliant sidewalk to the pool house and the public sidewalk along ------ Mariner Lane varied from the approved plans but the grading appears to be in general _--- - conformance with the approved plan. I understand that several unknown field conditions required the change in the site plan layout. A record survey conducted by King Surveyors on --------_ -- --- ---July' 301 2015--shows the location of the improvements constructed including the proposed - drainage facilities and grading asbuilts for this renovation project. Attached is the following: • The standard "Drainage Certification Form" used by the City of Fort Collins that provides a list of the various drainage items checked. A grading exhibit showing the proposed contours vs. the as -built contours for each pond. - Variations from -the -design were typical of those found on most construction projects of this - - - nature and had little to no impact on the proposed drainage structures. - -- While-onsite-we -also inspected the temporary erosion control measures which have been removed. Areas of grading were reseeded or sod had been installed. In conclusion, based on the record survey from King Surveyors the site has been constructed in general conformance to the approved plans. If you have any questions or comments, please contact me at 970.744.4717 or at michael.brake@merrick.com. Reviewed By: Michael Brake, PE-PLS Project Manager Fort C0111hS COMMERCIAL, MULTI -FAMILY AND SUBDIVISION CERTIFICATION FORM & CHECKLIST (Overall Site Drainage) Landings HOA Pool House Remodel (Project Name) August 18, 2015 (Date) (For Commercial or Multi -family, please list any applicable building permit numbers) Please fill in all applicable items in this Certification Form for Commercial, Multi -Family and Overall Single Family sites. A copy of the approved grading plan must be submitted with the as -built grading plan. (It is preferred to have the as -built elevations written in red next to the approved elevations) Use "OK" for items checked or actual numbers for items verified/surveyed in the field. Use "N/A" for items that are not applicable to the site that is being certified. Please provide an As -Built Redlined or Mylar drawing showing the following: A. Detention, Drainage Facilities, and Common Open Spaces 1. Pond Certification n/a Provide Topographic Records (grading certification with as —built spot elevations) and Volume = __ Verification Calculations. Show both the proposed and as -built elevations on the same plan sheet. n/a Provide Pond Cross -Sections and Spot Elevations (especially @ Pond Embankment and Pond Flow Line) n/a Positive Fall to Pan (if applicable) 0/a General Pond Grading including all Side -Slopes n/a Invert Elevation n/a Forebay Construction and Elevation n/a Spillway Weir (Location, Elevation, Height, Opening Width) n/a Placement and size of riprap or alternative permanent erosion control measures n/a Orifice Plate and/or Water Quality Outlet Structure Installation n/a Water Quality Capture Volume (Volume Required, Volume Provided and Water Surface Elevation) n/a Berm and Embankment Compaction Level n/a Subsurface Media for Water Quality Ponds and Swales 12/12/2014 Revision — Page 1 of 5 I 2. Swales n/a Location (are they within easement?) !/a Dimension and Cross -Section Verification n/a Longitudinal Slopes and Side -Slopes n/a Spot Elevations n/a permanent Erosion Control Measures (drop structures, riprap, lining) n/a Tie-in to Storm Lines, Pans, Curbs, or other appurtenances n/a Required Minimum Freeboard, Provided Freeboard n/a Landscaping Infringement on Flow Line? 3. Pipes n/a Size and Type n/a Slopes (As -Built and comparison to 0.4% Minimum) n/a Pipe Capacity Calculations (if slopes are significantly altered from design) . n/a Invert Elevations n/a Installation and Backfill n/a Cover n/a Encasement and Clearance from other nearby utility lines n/a Joints Type and construction 4. Concrete Pan Channels 17tO Size n/a Slope n/a Cross Section n/a Thickness n/a Elevations Cf Fort Collins 12/12/2014 Revision — Page 2 of 5 5. Inlets n/a Size and Type n/a Size of Opening (or name of Standard Detail used) n/a Grate Elevation n/a Invert Elevation n/a Box Size 6. Street Cross -Pans n/a Size n/a Type OLa Grade n/a Elevations n/a Cross -Sectional Depth n/a Tie-in to Curb and Gutter 7. Culverts n/a Size n/a Type n/a Invert Elevations n/a Headwalls or Wing Walls 8. Sub -Drains n/a .Size n/a — Type (Perforated/Solid) n/a Cover n/a Backfill Foi t Collins 12/12/2014 Revision — Page 3 of 5 e n/a Geo-Textile Liners n/a Clean -Outs 9. Curb Cuts n/a Size n/a Tie-in to Swale, Pipe or other appurtenances 10. Common Open Spaces X Overall grading contours of open spaces n/a Spot elevations adjacent to private lots (property corners) B. Low Impact Development (LID) Certification 1. LID Technique Specific Checklists (see attached) n/a permeable Interlocking Concrete Pavers (complete if technique utilized on site) n/a Bioretention Cells (complete if technique utilized on site) C. Grading Certification 1. Certification of Grade Elevations n/a Minimum Opening Elevations n/a — Top of Foundation Elevations n/a Comparison to 100-year Water Service Elevations n/a Comparison to Freeboard Elevations and Base Floodplain Elevations — BFE 2. Verification of Site Grading X Engineer to evaluate site grading compliance with the approved grading plan. X As -built elevations are to be redlined onto the approved grading plan sheet showing the as -built spot elevations next to the design spot elevations so compliance can be verified and documented. 12/12/2014 Revision — Page 4 of 5 t O Fort Collins D. Post -Construction Site Cleanup 1. Permanent BMP Measures x Construction Debris Clean -Up (In particular debris affecting the drainage) x Smoothing of Ruts in all Construction Areas X Reseeding of all Areas Affected by Construction Activities (Usually enforced by the City's Erosion Control Inspector but the engineer certifying the site needs to notify the contractor if areas are not seeded) E. Statement of Compliance This certification is signed and stamped and by signing this form the Engineer(s) attests that they have inspected the site and to the best of their knowledge the as -built conditions of the drainage facilities are as described in the above form and in the As -Built plans enclosed. Failure to properly disclose all known information could result in the rejection of this certification and prevent the release of any and all Stormwater Utility permit holds on Building Permits and/or Certificates of Occupancy within this development. F. Signature and Stamp by a Colorado Registered Professional Engineer Engineer's contact information: Michael Brake, PE-PLS — (Name) michael.brake@merrick.com (Email address) 970.744.4717 (Telephone number) Merrick and Company (Company Name) 1615 Foxtrail Drive, Suite 260 (Company Address) Loveland, CO 80538 8-18-2017 PE STAMP 12/12/2014 Revision — Page 5 of 5 Cftyof FOrtfins Construction Inspection Checklist for Permeable Interlocking Concrete Pavers NOT APPLICABLE Item/Activity Yes I No I N/A I Documentation/Submittal Requirements Excavation Post -excavation infiltration rates are consistent with design infiltration capacity (for "full or partial infiltration' designs) Impermeable Liner Impermeable liner meets design specifications Impermeable liner attached to concrete perimeter wall Impermeable liner is not exposed Any Penetrations of the impermeable liner have been sealed and checked for water -tightness. Concrete Cut -Off Wall Meets Specifications for: - Dimensions - Reinforcement - Footings Underdrain System Underdrain pipe is per design specifications At least one cleanout is provided per underdrain lateral Cleanout pipe is not perforated Cleanouts covers are installed and watertight Underdrain is NOT wrapped in geotextile fabric Underdrain orifice plate installed at outlet structure Underdrain integrity tested after backfilling using TV and/or water test Aggregate Base coarse (e.. #2/4) has 90% fractured faces Bedding coarse (e.. #89) is thoroughly washed Subbase materials are installed and compacted according to manufacturerspecifications Protection During Construction 12/12/2014 Revision — Page 1 of 2 PICP area is protected from construction site sediment, including runoff from the upstream catchment and construction equipment traffic. Close Out Upstream catchment is stabilized prior to diverting runoff into PICP system of Four/ �-rt`� 12/12/2014 Revision — Page 2 of 2 of FOB art` Coltins Construction Inspection Checklist for Bioretention Cells NOT APPLICABLE Item/Activity Yes I No I N/A Documentation/Submittal Requirements Excavation Heavy equipment did not travel over bioretention cell during excavation Bottom of cell was "ripped" after excavation Photograph before/after "ripping". Bottom of cell is flat and level Photograph Excavated area is protected/surrounded by sediment/runoff control BMPs during construction Photograph Inlet Inlet invert elevation is at least 3 inches above containment wall/berm Measure/record distance between inlet and top of containment wall berm Upstream catchment drains to inlet Foreba Forebay is installed according to design specifications Foreba y has flat, concrete bottom Outlet Structure/Overflow Outlet structure/overflow elevation is confirmed Measure/record distance from overflow to top of media filter Impermeable Liner Impermeable liner meets design specifications Impermeable liner attached to concrete perimeter wall Impermeable liner is not exposed Underdrain S stem Underdrain pipe is per design specifications At least one cleanout is provided per underdrain lateral Cleanout pipe is not perforated Cleanouts covers are installed and watertight Underdrain is NOT wrapped in geotextile fabric Underdrain orifice plate installed at outlet structure Underdrain integrity tested after backfilling using TV and/or water test 12/12/2014 Revision — Page I oft Filter Media Filter media composition is per design specifications Filter media was "machine mixed" by supplier prior to delivery Filter media installed flat and level Other Structural Com onents Containment wall/bean is continuous and level Landscaping Final landscaping does NOT include sod Final landscaping wood/rock mulch) is flat and level Vegetation is planted according to landscape design specifications Verify that weed barrier is not installed Temporary irrigation installed . -- — - If N/A, then verify that permanent irrigation is installed to establish/maintain vegetation Close Out Upstream catchment stabilized prior to diverting runoff into bioretention cell 12/ 12/2014 Revision — Page 2 of 2 --- __-- : PROTECT EXIST IRS EGA EXIST TIMBER (COORD RELOCAPON AS FETA IIING WALL NEEDEO)�TO BE REMOKD M AS \�EXIST SIDEWALK TO BE REMOOD PRO OR TREE J TO ICTOR PROTECTEXISTWATER- i0 CONSTRUCTION VALVE IN PLACE PROTECT EXIST _ \' PH RIM \-SAWCU E+l 1 SIDEWALK i- - NEAREST JOINT APPROX LOCATHON ASPHALT SPHALT EXIST CURB. CUTTER SAWCU7 & SIDEWALK TO BE REMOVED / So h LAKE 67 ^ - - / f 4 43l DEMOLITION PLAN III 17 E 10]09. A, II ) PFOPERTY CGRNER 'H,) PP. ♦IDE�MO R, R1OPEll II „III II^ I\ Il II, \\III rI I PR A / RASP - - FRCP ROD / REAIIGW. OVERALL SITE PLAN soLE rsD' r f EXIST 6flPCE J LANDSCAPES - 60uL0EF WWALL (HEIGHT VARIES) os� • SJEW LE FINISH 1"AADE SIDEWALK SECTION A•A '- LINE AND CURVE TABLE UNE/OUI BEARING/DELTA LENGTH 1083 L2 N12'20 17'W 1 31L3 N]7'3S 13'E 785 IMADIUS613]OI" C4 900000 IIDO' CS IB'28O' 615 L1 S83'5 5'E 1611" L4 50731. 44'W 951' 10. 00 99�65�X \ \ fie lbA6- 11 `I '1 1 1 1$ I YI ,\ aOa AB �PFOFDSEO POOL--' ( 1 1/ ExISPrvC POOL � I POOL BUILDINGCR ExI511NG---- HEADWALL TO (SEE ARCHHORAWNL`.� REMAIN ( l l 1 POOL B ILG rvE. \ N: 101D6.66 15EE TER N OF tN! GS FIF E:101]7.8\ 1 POOL AND POOL BJLD N.51 T-100 1 11 I 1, a WIDE CONC WA.n A 1 INTO POOL BUILDPI ENTFPN • -'A eT<B 1 1 lCO0R0 W/B_DL 11_11 RELOCATE ExlsT IRS -100 \ CONTROL BOX AS� I NECESS FT (CC TC r 100 s 5ai q0 1026U n...CPC - Ex15i EE i0 Bf PR TECiF➢ S WATER SEflMCE GRAIN �-i 4 5501_lCl L Pli ` N10.E4.]]_ :i50i-J� ''�'�� _�IWATEA SFRN('E / E 1022(148 - 1 N:10062 _ 1 A6 \ / 10000 9U. C102432 q 9 ROOF OVER HANG q �' (SEE ARCH pRAWING51 AS 5l- GONE >'.Y SW.. SISH AS A ' , u XOPCAPEO .fY � 'N^/ , - , -M AB LtSe RPH -9]sz AS BWIDEA WALL 97.29. m _ (HFJGHT VARIE$ 908 _�-yy •ram _ 9]IO AB -N AX HGFT IN -c 971 97 -, 4 97 7 54f -9'� _ dT0�T2�-�_ _- 9]Bi AS �` __ - - 9 1 -97BE / a 96 59 /� -.1 76 JPy$E TO 1 WATER - ERNLE AT EXISTING `k ."•` y APRROK LOCATION- E"T MH RIM fFP.OTECT IN PLACE) N:1W48 E:10311.59 / / PATCH EXIST ASPHALT RAMP (iFE DETAIL) METER --90_j FLRe!-OVER-/ CURB W/ ATTACH TT4 WALK X F IWJ 1 _ LU UC Exl�l ROLL-OVER- CJRB W/ ATTACHEL -PATCH EXIST Sa. M'y \ ACLT55 WALL \ ASPHALT (6e"MK<� A ♦` / RO JN� SS6fl AS AS SO fi .5 0 ----- ------------------------------ __ ---------- ____ CP-ID2 _- E:1026422 ♦..�� 4 GRADING & EROSION CONTROL PLAN TREE PROTECTION NOTES, A CDNTRXCTDF TO PPDIECT mEEE DEPICTED AND LIMIT DISTDRBANCE TO TREE IRUNF ANO RUCIS DURmG GFXMXc MVC I:.YSTUJCTI. FORT COLLINS BENCHMARKPRWLCI CAJOEMLAMBS OP[.AT1aui a R CITY MA K T CONCRETE NOTE, 1/2 OF FORT COLLINSOF(45-OO ON A CONCRETE CURB, LOCATED APPROXIMATELY 10 5 0 10 20 I/2 MILE SOUTH OF MORSETDOTH ROAD, WEST OF COLLEGE AVENUE AT THE A ALL CONCRETE SHALL INS 4D00 P9 AND ADHERE TO 1HE -- ENTRANCE TO BARNES AND NOBLE BOOKSTORE. IN THE NORTHEAST CORNER OF PEnN.Anarv9 OF THE LARIMER CININTT - OCKSTRUCTOry THEIR PARKING L07 SPEDFOATONS. CHAPTER 22, SECTOR A OF 22.41 ORIGINAL SCALE: 1 = 10 ELEV = 5036 7E BENCHMARK J2, CITI OF FORT COLLINS (2-97) APPROXIMATELY T50 FEET WEST OF 500 SKYSXIL LEGEND LANE, ON NORTHEAST WINGWALL OF THE FEEDER CANAL TO WARREN LAKE ELEV = 5002.63 EXISTING MINOR CONTOUR BENCHMARKS - — - ' — — EXISTING MAJOR CONTOUR III PROPOsED MINOR CONTO N R T 'R BENCHMARK, LOCAL ASSUMED DATUM CA 101 - BCD NAIL ELEVATION = 100.60 = 5004.95 IIAVD 88 NORTHING 10106.80 EASTNG 10137.66. BENCHMARK. LOCAL ASSUMED DATUM CP 102 - CHISELED 'X' IN CONCRETE ELEVATION - 96, 15 = 5000 50 NAV➢ 88 NORTHING 1000143 FASTING 10264.22. 5 95 - PROPOSED MAJDA CONTOURS -- ROw LAME EASEMENT PE]I� LANDSCAPES SOCUTI WALL ME, MATCH EXIST GRADE ( - - • ASSAIL] SPOT ELEVATON City of Fort conim, Colotvdo U I PLAN APPROVAL MPRDKI Z- -!5 cT1Fc.ru 6r. CHECKED .1 .9memw.I •Im., GHEc6m e<. 4. D j G Xir N far &Rxe.•IPA, Wm GHEE 1116 NA TV EPRAMP �Ph IGa OHELKE➢ 6 Embe _ 1>+HS « w=n su€ iamk' � c w0 j TFaaa Z w CYAT TU AT 0 C) U J OC y Q r IY9OO N W m � O U w 9 w z z z F a Z 0 DO a F oQ c0 3{ a O 7 _V) Z_O ZO Of ZW 00 cr Uj J Uj 6 ICIIOW xA1.siL b9IDW. SHEET 3 OF 5 Cellnael.ydudig. JOB No 3970301 Z N N E � m ARIS p a 2 IY IS Al ID LU O U 6 .pB N0: 99fi30t DATE artvmts FIELD ASBUILTS COMPLETED BY KING SLRVEY0R5 � f f Z ON JULY 30, 2015 E-151 SIGN TD 6E •• pq c'! F• S' fF RELCCAIEp yT ,—Fc01E:! E 5r Pz 1 PL>Lr Il,vI GFGI Ci Ei5 i _ DEMO EVGTf-'_ - CONC PAD---�r�__- JFL•.:EiI E'I$ FIRE D,NAAHI �� y ': A I11 PLACE file)DEMO —��- APE EXISAREA ��_ - \mot I AuoACAPE DER - - - o HEADER J�OEMO NRB k GUTTEP� L FL-EXST ROLL OAR- AIPPOI LOCATON CURS k GUTTER OF SA.L, 'TIP) DEMO CUPS/CUTTFF L ) SIOEWPIY FL A/ ROLL- GAP -- RB ow . ow �cuge w/ raEo wµx A/ARK q /u% �------�_-- ----- DEMOLITION PLAN SEE SHEET 3 T MR. -I � � �_� � � AB i— AR RA — BRA AIR � -%n e y • A l £i4C _l_ J i. A3 AW X � %91/.B_ b33 - RELOCATE E.I_ _ - n'GEN RAP WALE Ci 10 Ne, �I _ P RBWCE STOP Si,-N �\ .ee, ;VA—� - RWtPP SwµE ilOwLINE /- %oAB %SAB �_... -�—PLY D-: _ `k %9r AB_ 5' YIN. MD1N ` TIP _ __ _ ATTACH0 SIDE. ` MATCH EXIST fL (iwl ATCX EAST (SEE DETAL sXEFT s) .� I ` EPHALT SIGEWPLN CHPSE CONC / ' S MIN WIDTH PCCSS RdMP MATCH EXIST FL PI}AC5 SIDEWALK JI Pn TCX Ei15T F1£tiATOPS (TYP SEE DETAIL DRPIN PPN ($EE DETAIL �EAIST TREE (SEE DETAIL SHEET 5) _ -0 3 as.ALT SHEET s) SHEET 5) DRIPLNE (TIP) - 2 4, 4A/NFR ---" ------------- -._.. _______________'-- - (sp FC(µ NF / P-1 -ice • �I _ GRADING & EROSION CONTROL PLAN • A DCMo CUFB a ITTEP� GE 1..PR L; TT£F k DENALI 1 :7 1 17> B• %PEAB� —___ %rs s __ tam._ ACCESS RAMP MATCH EXIST FLU ELEVATON5 (TIP. SEE DETAIL SXEET 5) ------------ PATCH EXIST ASPHALT 0 • J� uWwWZO 2 NO u�pF tF Know what sbelow. Cell before you dig. i & ' iiC, z Z qp zJ "I :A'IAL 5 ALL i NOTE& I CAXDNG HE IH FRW BACY: OF A. H, BE 1 N 1 PRCOOSFD ACCESS RAYPS 10 YAIW r.snNG R 0-t'."p15 LEGEND - E<ISTNG MINOR CONTOUR 2 - ENSTNG MAJOR COHT.X. 9E PPCFO&CD MINOR CONTWRS N 95 PROPOSED Ma" CONTOURS A A N m 3 Y ----� ROW LINE o EASEMENT Lor LAOF AEBotT SPOT ELEVATION XX z O � Q_ F Q City of fort Collins, C.I..dO a0 Ad d U L PLAN i\F'PROVAL = O Arrorvm I T din _ t��L - - In V Z m A 0 Z a � i wMM sN, TLM a� z O W Z 00 ONEaoo e- s-I.MR.. ,IWr - — Z a: O .Eo er: _ pAiuk w, o.M J lil Cacao. er: T./u C16IXL. T._ DAM SHEET 4 OF 5 No 3970301 FIELD ELJILTS COMPI-ETED BY KNG SURVEYORS CMJ DULY 30, 2015 JOB Not. 3910505 DATE MM15 SNEET 20F2