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Home My WebLink AboutSite Certifications - 07/05/20070 STORMWATER RECEIVE® JUL 0 2 2007 July 2, 2007 Wes Lamarque City of Fort Collins-Stormwater 700 Wood St. P.O. Box 580 Fort Collins, CO 80522 Re: Hach Building -Stanton Creek 3`d Filing, Drainage Certification g Dear Wes, This is the drainage certification for.the site of the Hach Building -Stanton Creek 3rd Filing. LANDSCAPE ARCHITECTURE PLANNING ENGINEERING GRAPHIC DESIGN Attached is the drainage certification form, the as -built grading drawing, and the supporting drainage element calculations. The as -built survey was provided by King Surveyors. The drainage- elements are labeled respectively with the calculation work sheets in the as -built plan. The building finished floor elevation is slightly above the proposed FFE and the as -built grading provides sufficient positive drainage away from the building. Sincerely, 0 Jonathan F. Sweet, PE Project Engineer PE# 40341 f 153 WEST MOUNTAIN AVENUE FORT COLLINS, COLORADO 80524 P970.484.1921 F970.484.2443 INFOOJIMSELLDESIGN.COM JIMSELLDESIGN.COM 11 -1 DRAINAGE CERTIFICATION FORM Please fill out all applicable items in this certification form for single family, multi -family and commercial properties. Write "OK" for items checked or actual number checked in field. Use "N/An for items that are not applicable to the property that is being certified. A. Drainage facilities certification 1. Pond Certification 44 -volume verification a.topographic records and volume b.cross-sections and spot elevations -positive fall to pan -side slopes -invert elevation -spillway elevation -placement and size of riprap -side slopes _grading -orifice plate installation and size_ -compaction of berm -structural integrity of pond 2. Swales e,b.A.%-N A Z. Sw e.l-cs* - d 14- -location (are they within easement) -dimensions and cross-section verification -longitudinal slopes and side slopes -spot elevations -permanent erosion control measures (drop structures, riprap, etc....) -tie-in to pipes, pans, curbs, etc.... -weir size (elevations, size, opening, etc.) -available freeboard -landscaping infringement on swales 3. Pipes N(A -size and type -slopes (as -built and comparison to minimum 0.4% slope) -pipe capacity calculations if slopes are significantly altered -invert elevations -installation and backfill material -cover -encasement and clearance from other utility lines close by -joints 4. Concrete Pan Channels � C1., tj_t,A % - OIL -size -slope -super elevation -cross .section -thickness -elevations 5. Inlets -size and type -size of opening (or name of standard used) -grate elevation -invert elevation -box size 6. Cross pans - Gr.4. Lu_Q 6 Ob 3' -size -type -grade -elevation -cross-sectional depth -tie-in to curb and gutter 7. Culverts _ 1^Io, -size -type -invert elevation -headwalls 8. Underdrains A .size -type -cover -backf ill -geotextiles -cleanouts 9. Curb cuts - d\L -size -tie in to swale, pipe, etc... B. Certification of Grade Elevations Adjacent to Drainage Facilities: -minimum opening elevations -top of foundation elevations -comparison to 100 year WSEL's (Freeboard requirements and floodplain issues) Certification of Erosion Control Measure/ 1. \Permanent Measures: -Permanent vegetation (6" bare Control) -rXprap -ripYins ing -drons -sedsins/wate quality ponds -nets/blank s -mul 2. Temporar s- -mul -inlr ins allation ams -seeding and temporarXruvegetati,n -s' t fence D.Si Cleanup After Const-construction clean u -smoothing of ruts -reseeding E. Statement of Compliance 11dT cAAc.4&va a 5 . (,I281oa- and weeds under 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 redlined plans enclosed. Failure to properly disclose all known information could result in the rejection of this certification and prevent the release of any Stormwater Utility holds on Building Permits and/or Certificates of Occupancy. F. Signature and Stamp by a Colorado Registered Professional Engineer. Channel No. 1 (as of 7-2-07 Field Visit) Worksheet for Triangular Channel Project Description Worksheet Channel No. 1 (as of 7-2-07 Field Flow Element Triangular Channel Method Manning's Formula Solve For Discharge Input Data Mannings Coeffic 0.035 Slope 1.0215 ft/ft Depth 0.75 ft Left Side Slope 3.00 H : V Right Side Slope 3.00 H : V Results Discharge 5.27 cfs Flow Area 1.7 ft' Wetted Perimi 4.74 ft Top Width 4.50 ft Critical Depth 0.72 ft Critical Slope 0.0269 ft/ft Velocity 3.13 f/s Velocity Head 0.15 ft Specific Enerc 0.90 ft Froude Numb, 0.90 Flow Type 3ubcritical Nye t [. Gltic.w►+cl Au.l 1tt4-5 -CkeLa 4,o OP1. Z. Qlp 'l Yioo C' �?Ppl Arc l.5(o ats t 3•-32 ela 3. Mks .%" A V . ,meld vrs;+ ov% '7/Z fo1 41-Va Sala IAA! tisN+ C�wair' e'er V0�1� r.a�IN S IIA.��f �VIN:S. Project Engineer: Jim Sell Design Inc e:\...\dwg\record drawings\hatch asbuilt calcs.fm2 Jim Sell Design Inc FlowMaster v6.1 [614k) 07/02/07 12:21:40 PM ®Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 Chase No. 1 (Asbuilt) Worksheet for Rectangular Channel Project Description Worksheet Chase No. 1 (Asb Flow Element Rectangular Chan Method Manning's Forrnul, Solve For Discharge Input Data Mannings Coeffic 0.013 Slope 1.0050 ft/ft Depth 0.50 ft Bottom Width 1.00 ft Results Discharge 1.60 cis Flow Area 0.5 ft' Wetted Perimi 2.00 ft Top Width 1.00 ft Critical Depth 0.43 ft Critical Slope 0.0075 ft/ft Velocity 3.21 ft/s Velocity Head 0.16 ft Specific Enerc 0.66 ft Froude Numb, 0.80 Flow Type 3ubcritical riV+G t tJ Ir b,� v 'S -' A as �1� c6.�,,�t 1 � DP I Z. Q10 s 1.34 cls i Qto� 3.LZ ar+t 3. %T� Lln&As Imo, s Lw, eo�oc •�Y -�° cl:vcr �t,�v. o UM-4er d. w&-w- Ct J.�..- 0.w rove- &,1110 , NvAc U w: ii-t ov cr 3wp !-�.c We��lt J vv`%� 100 I r &%( awe.. Project Engineer: Jim Sell Design Inc e:\...\dwg\record drawings\hatch asbuilt calcs.fm2 Jim Sell Design Inc FlowMaster v6.1 [614k] 06/28/07 01:56:08 PM 0 Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 Chase No. 2 (Asbuilt) Worksheet for Rectangular Channel Project Description Worksheet Chase No. 2 (Asb Flow Element Rectangular Chan Method Manning's Formul. Solve For Discharge Input Data Mannings Coeffic 0.013 Slope 1.0183 Rift Depth 0.50 R Bottom Width 2.00 It Results Discharge 7.44 cfs Flow Area 1.0 ft' Wetted Perim( 3.00 ft Top Width 2.00 ft Critical Depth 0.75 ft Critical Slope 0.0057 ft/ft Velocity 7.44 ft/s Velocity Head 0.86 ft Specific Eneq 1.36 ft Froude Numbs 1.86 Flow Type supercritical 1 `Chess �s �+� i� 3:dewallt Gkwst � �L AP 3 , CA �. `t1u Sie1t...►r�1i. t1J•w� t (.�vi Sw��tit�1{ "Ala" Ala 11l X"- bc�w. Project Engineer: Jim Sell Design Inc eA... \dwg\record drawings\hatch asbuilt calcs.fm2 Jim Sell Design Inc FlowMaster v6.1 (614k] 06/28/07 01:55:58 PM 0 Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 Channel No. 2 (Asbuilt) Worksheet for Rectangular Channel Project Description Worksheet Channel No. 2 (Asb Flow Element Rectangular Chann Method Manning's Formula Solve For Discharge Input Data Mannings Coeffic 0.013 Slope 1.0500 ft/ft Depth 0.50 ft Bottom Width 2.00 ft Results Discharge 12.29 cis Flow Area 1.0 ft' Wetted Perimi 3.00 ft Top Width 2.00 ft Critical Depth 1.05 ft Critical Slope 0.0063 ft/ft Velocity 12.29 ft/s Velocity Head 2.35 ft Specific Enerc 2.85 ft Froude Numb 3.06 Flow Type supercritical ►kov e. , t..X� !?O 3 2• Qro� r• 3y cis 4cwa 3.38 C.4% C L&A VVV16-d b. w a K s..�cwl Coati �« 4-k. 4"a jar Project Engineer: Jim Sell Design Inc e:\...\dwg\record drawings\hatch asbuilt calcs.fm2 Jim Sell Design Inc FlowMaster v6.1 [614k] 06/28/07 01:56:41 PM ®Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 Chase No. 3 (Asbuilt) Worksheet for Rectangular Channel Project Description Worksheet Chase No. 3 (Asb Flow Element Rectangular Chan Method Manning's Forrnul. Solve For Discharge Input Data Mannings Coeffic 0.013 Slope 1.0141 ft/ft Depth 0.50 ft Bottom Width 2.00 ft Results Discharge 6.52 cfs Flow Area 1.0 ft' Wetted Perimi 3.00 ft Top Width 2.00 ft Critical Depth 0.69 ft Critical Slope 0.0056 ft/ft Velocity 6.52 ftfs Velocity Head 0.66 ft Specific Enerc 1.16 ft Froude Numb, 1.63 Flow Type >upercritical i% %W�t- cl.4.ace W S;AO—.06(k. e6v,ce) Z. 016 ! 0'.. = T, S8 1's t 1L C k\..Ori IL S or OEve.•vi%I 344Mu c-r 4y4 9,fee. �n� t 1., 4f106% etrloac, _ l 4r (0044, Project Engineer: Jim Sell Design Inc e:\...\dwg\record drawings\hatch asbuilt calcs.fm2 Jim Sell Design Inc FlowMaster v6.1 [614k] 06/28/07 01:55:46 PM 0 Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 Channel No. 3 (Asbuilt) Worksheet for Triangular Channel Project Description Worksheet Channel No. 3 (Asb Flow Element Triangular Channel Method Manning's Formula Solve For Discharge Input Data Mannings Coeffic 0.030 Slope I.0231 tuft Depth 0.30 ft Left Side Slope 10.00 H : V Right Side Slope 10.00 H : V Results Discharge 1.91 cis Flow Area 0.9 ft' Wetted Perimi 6.03 ft Top Width 6.00 ft Critical Depth 0.30 ft Critical Slope 0.0250 ft/ft Velocity 2.12 ft/s Velocity Head 0.07 ft Specific Enerc 0.37 ft Froude Numb. 0.96 Flow Type 3ubcritical d.V, C. a..,......%-c 1 C c.. d ti\ A e D? S, 3. 'tom s ....-1-X IL t�Vt! LoC 40 J..t..,� ry a,.�tst- ttv e-eL4 c t cl hk 4w awl ru< w, nw e t.v �►.,-� Project Engineer: Jim Sell Design Inc a:\ ..\dwgVecord drawings hatch asbuilt calcs.fm2 Jim Sell Design Inc FlowMaster v6.1 [614k] 06/28/07 01:56:30 PM 0 Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 Channel No. 4 (Asbuilt) Worksheet for Rectangular Channel Project Description Worksheet Channel No. 4 (Asb Flow Element Rectangular Chann Method Manning's Formula Solve For Discharge Input Data Mannings Coeffic 0.030 Slope 1.1300 tuft Depth 0.50 ft Bottom Width 1.00 ft Results Discharge 3.54 cfs Flow Area 0.5 ft' Wetted Perimi 2.00 ft Top Width 1.00 It Critical Depth 0.73 ft Critical Slope 0.0484 ft/ft Velocity 7.09 fits Velocity Head 0.78 ft Specific Enerc 1.28 ft Froude Numbs 1.77 Flow Type supercritical Vl.* A* . k. T1W4,i rs ko. CUhA £ G4�@.vvL f% a.4 VPL J,re�;,4� z• Ltd= 0.23 P-ts � ae,n for 2 Q100 = o.so �aS `z G ez !war 1 t i o vt Project Engineer: Jim Sell Design Inc eA... XdwgXrecord drawings\hatch asbuilt calcs.fm2 Jim Sell Design Inc FlowMaster v6.1 [614k] 06/28/07 01:56:19 PM ® Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 STORMWATER RECEIVED JUL 0 2 2007 July 2, 20,07 Wes Lamarque City of Fort Collins-Stormwater 700 Wood St. P.O. Box 580 Fort Collins, CO 80522 , Re: Hach Building -Stanton Creek 3'd Filing, Drainage Certification . Dear Wes, LANDSCAPE ARCHITECTURE '. PLANNING ENGINEERING GRAPHIC DESIGN This is the drainage certification for the site of the Hach Building -Stanton Creek 3'd Filing. Attached is the drainage certification form, the as -built grading drawing, and the supporting drainage element calculations. The as -built survey was provided by King Surveyors. The drainage -elements are labeled respectively with the calculation work sheets in the as -built plan. The building finished floor elevation is slightly above the proposed FFE and the as -built," provides sufficient positive drainage away from the building` / 0 Sincerely, f O t/C _ JA u,ct y �K&s IT Das fcka 5 C-, l icy 4,500 es-evo�. 2 nathau F Sweet, PE r o ect'En �� teS� �# 40341 1 � 1 4 all`Ooss<�e ri 153 WEST MOUNTAIN AVENUE FORT COLLINS, COLORADO 80524 P970.484.1921 V970.484.2443 INFOPJIMSELLDES.IGN.COM JIMSELLD. t4T,1 4A I I I I EX ROW 501 I PROPOSE rROW 57.; I I I X' WIDE NDS DRAIN CJANNEL—SEE NDS S EE—D DUAL 'ON RARI DETAILS SHEET IL �I ,- 1 JJJI 1 I I I 1 1 I 1 s�.w/tkv��6�v FWNN€L 1 SSDND 1\ 11� 13 1 I / ♦♦ I // ♦ � --^ I //,fig \\ ` } ♦ \- �— CHANNEL _p sculls ♦♦ — /'/Ur--.'—\. rWu. .-fq0• \I AND GCUURRB LID \♦♦ ♦ (� 1 \ \ O ] CAN \ FUTURE PARKI CV A / \ \ 1\ ` OYi`4NNED -'.♦ cE of ruaec, N0. ♦i 1W Eno coned `•� G`HANNEL \ i3— \�NO`.\S2 0 GUTTER _ ♦ _ - \p 11`40. 'A \ 21 CU / I•/OUTFALL CUTTER \7 CURB AND i / GUTTER INBF\MD AMID yK' ♦ 4g : ` ♦ \ I` \ \\ `\ � '• \ CURB MID - - - \ I ♦ \ \ FI�IVRE\ 1 \\ a i>v PAMT�+ I I ♦ 1 ♦, �, \ K9Iq I\ \ Pei9 1CF,4N bra �� I. _ .� �.�� ^♦_A��V __ - �V - .`F__. �\ `V I `\ `AF I I ! •,` i nb i \I `\Building`\ `\ `\ � `\ I \\ ENvelapeBl L\ \ I\,. E KIDS DUN DN CHNNANSEE SPEE-D DNDS 1 UILDING i \ 11 \\ --_ _ SpEE-0 DETAIL ON \ ROXIMATE 1 \ IJ 1 SRu� E DETALB \I . Pbi9323 \ 1 - 1 \ I \, E ♦\ -\\ ♦♦ i \ REMOVE ACCLYiS ANO REVIM.T: l \ 1 I. \ WITH ARXIIGLI WRB/ 1 \ AMID PARKWAY\ EX. ROW 85• 1 PROPOSED STANTON CREEK DRIVE I I ROW 89• F I\ CORD DRAWIN LarWrcaPe ArtAthelure, 0 10® 131 eiy.kml AKAKEng SCALE _ 1• ru. Asuvu u LEGEND ,. MITFAL CURB AND GUTTER —0.5% SLOPE LROW TB.00 X SPOT EEVATON CL-EX ABBREVIATIONS GB MADE REAK W CENTER(INE EX EDGE of CONCRETE EX EXIST FFE FINISH FLOOR ELEVATION R FLOVAUME HP HIGIIPOINT LP LOWPOINT DOA CODE OF ASPHALT TOS TOP OF, STEP BOS BOTTOM OF STEP AB AS -BOLT TOP TOP OFSLOPE TOE TOE OF! SLOPE RECORD DRAWING. NOTES I. AS -BUILT SURVEY SHOTSiCMAPLETED PRENWS TO SODDING AND LANDSCAPE BEDS. AS- ILT SHOTS ARE SHOWN NEXT TO THE CROSSED OUT DESIGN T. 2. CHANNEL #1 WAS FILLED N AFTER AS -BUILT TOPO WAS COMPLETED. SWALE WAS RE-EXCAVA D ON 6-29-07 MID FIELD CHECKED BY ENGINEER ON 7-2-07. 0 IFIED.FLOWIASTER OROSS,SECTION D:A'+1LY1fY9W1C£hC li +e:-v'(3 1 SIDE SLOPES, 0.75E DEEP). 3. ORIGMAL SOILS REPORT 61T SOILODIC STATED THAT THERE SHOULD City of Fod Collins, Colaratlo UTILITY PLAN Approval ArrawEo. Clow Dow CHECKEDBY �Nw Do CxECKEDE7 .�.Y DA, CHECKED BY cxecxe0 By Trr� r CHECKED BY w`_ s CALL UnuTY NOTFICAnaN CENTER OF COLORADO 1.800-92.2.1987 or 5348700m w... Z O 0 J D _ U M� O W LL 2 /„ Z U (Q =Za C LL m DO 0 Lu 7 Lu Lil r 9 U UZ Z ll i Z � z z F a a,N ..w..e o pt o fsfY'Fe^e'\b" i� iW1t Designed ac CAeCked in Date 7-2-07 Projeot / 250E 1 OF