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HomeMy WebLinkAboutDrainage Reports - 12/12/19949 n U uTnzrms sow Consulting Engineers'and Surveyors December 7, 1994 Mr. Basil Harridan Stormwater Utility City of Fort Collins P.O. Box 580 Fort Collins, CO 80522 Dear Basil: The Saturn automobile dealer located at the southeast corner of South College Avenue and Foothill Parkway desires to make an addition to his building. The proposed building addition is 1177 sqaure feet, and the net addition of hard surface will be 835 square feet. This site is located at the northwest corner of the Foothills Fashion Mall and is in the Foothill Drainage Basin. The site is platted as Tract D of Southmoor Village, Fifth Filing. The site is labeled Empire Savings on the included map of the Foothills Fashion Mall Expansion Storm Drainage. The site is located within Areas 12 and 16 on this storm drainage map. The Storm Drainage Report for the Foothills Fashion Mall Expansion used a C factor of 1.0 for Area 12, and a C factor of 0.95 for Area 16 to calculate the developed runoff quantities from these two areas. Therefore, the maximum runoff quantity from these areas was used for the design of the drainage facilities through the Foothills Fashion Mall. The addition to the Saturn building will not increase runoff quantities or volumes over those used for design. Runoff from the site drains on the surface to Foothills Parkway where it enters existing inlets and pipes. The pipe system carries water to the east side of Stanford Road, where it enters a drain ditch that runs to the Southmoor Village regional detention pond, located on the west side of Lemay Avenue. The inlets along Foothills Parkway will overflow during a 100 year storm and this overflow, which will include the additional runoff generated by the Saturn addition, will flow east through surface flow paths provided across the Foothills Fashion Mall Expansion. This surface flow goes through a small detention pond which was constructed in 1989 by the Foothills Fashion Mall Expansion. The capacity of this pond, per a 1989 certification survey, is 17,002 cubic feet, and the required volume was 15,782 cubic feet, leaving an excess volume of 1,220 cubic feet. In 1990 when the Empire Savings building was changed to the Saturn dealership, additional paving was constructed. This additional paving generated 405 cubic feet of runoff which drains to the detention pond, thus reducing its excess volume to 815 cubic feet. James H. Stewart and Associates, Inc. 103 S. Meldrum Street P.O. Box 429 Ft. Collins, CO 80522 303/482-9331 Fax 303/482-9382 December 7, 1994 Page 2 i The proposed addition to the existing Saturn building will generate 150 cubic feet of additional runoff during a 100 year storm. This 150 cubic feet of additional runoff can be handled by the existing detention pond's 815 cubic feet of excess capacity. The 100 year runoff from the existing Saturn site, per the 1990 drainage report, is 4.37 cfs, and the 100 year runoff from the Saturn site with the proposed building addition is 4.47 cfs. This additional runoff of 0.10 cfs will have negligible impact on downstream drainage facilities. Included in the appendix is a copy of the 1990 Saturn drainage report. Also included is a copy of the 1987 Storm Drainage Report for the Foothills Fashion Mall Expansion, and a plan of the small detention pond constructed by the Foothills Fashion Mall Expansion in 1989. During construction, the area where the new addition is located will be stripped and the concrete foundation will be constructed immediately, so any bare soil exposure will be brief. A silt fence shall be installed along the existing curb on the downstream side of the construction. This silt fence location is shown on the enclosed map of the Addition. The silt fence shall remain in place as long as there is bare soil. The contractor shall be required to clean off all debris and mud tracked onto pavement. All erosion control must comply with City Criteria. The cost of the silt fence will be approximately $200.00. Therefore, the minimum erosion control collateral of $1,000.00 will be required. Sincerely, v(/l �•�,: GIST Eett•0�, Phillip I. Robinson Vice President 2 *i 450 rsc y, enclosures �" "" Tt fif n U No Text � o J 'ten -70 N Cui >Q z (Vol LU O \ r \ F-- 3NIl MOk! 0 \�wIr G Steel orWoodPost—\ /--FiIterFabric Backl=illed Trench Filter Fa6ric Attach Securely to Post .Steel or Wood Post Compacted Backfill Runoff �� Illllll V I Approximately I'/ 111� L= Ipnlp= 4' x4' Trench 10 MIN. llll =II mr= L' IulUll SECTION VIEW General Notes: 1. The maximum tributary area is limited to 0.25 acres per 100 feet of fence. 2. Inspect and repair fence after each storm event. Remove sediment when one half the height of the fence has been filled. Removed sediment shall • be deposited in an area tributary to a sediment basin or other filtering measure. SILT FENCE CITY OF FORT COLLINS, COLORADO STORMWATER UTILITY APPROVED BY: DATE: REVISIONS: D-2 p FIGURE 6.7 STEWART&OLSSOCIATES 103 S. PH 482-93 DRF X F4882 9 COLLINS, CO 80521 Consulting Engineers and Surveyors • f By: PIP, Date: /O 6 q Client: /✓�� r� cy Sheet No. of l Project: dAi4;on fo Sa ur-n Ps 13Ui)di Li yL" f00'i^11//vl0 Subject: 15-Y0rY+ N IDrar a.'e I I ' IG - r-- 1,in l'i P GC N� r��1F,D = 4a1uMe� enl r �„c' 151 _ 1 r J yr_s)o/. , �0) s)lZ/6 c_F•- cFcAavu)I(l'os)(i.�;)(o.itJ(e,oi4z, ccF %�D1716IV, .l zvNa'FF I I! i l l50'fF I i I!j �IIII�! I i I s,7EI17N! ! av1 Lb /✓C ! fiDDI?1a.✓ I..j.lil toy 'sf>Lc� I o.713 f1c' �o✓s�- rcc =' jo:¢3a�Ac �q)Vr o.o/►: 0.�945 AEI orcti._I ,O.125S,hct el,!/)7.=; 0,I23t.Ac i �o me 4 j0.NBG. 0.0 Yk C' +(o,i23(IVal zo-f(0'oz0.7/G' III f1 i 0'.7/ 3 !! l0 7f6 i_ _ ca f�,o, i _Li i 0,70 JIC�.I :�or �h�'o6'sI l Saivr� si rr� cc. I,!I { , I vr�0'lLvl0. )o� o' i-iit S I r �t �- � 1, i� � � , 0. vrr si�e I sr; 1 Y90 ;rc�or'� _ �c�z= Ilo.7v)izI s(0.717) l;-Z,S- I I I C��u jC0.7v�(¢.9 (0-7/3) - 2-zU Q, _:_ �tZi)�0/77 (1 C0,7/3)I I¢.3711:141 />70i� OTj.�71 oofEFSeti/ 'S1 1 I e l l i 0.7/O(z.� tv¢ ir�.1.2� G1` 1 _ (0.7/O( 7)(u17h3)i� l ¢.47!G• s , I i I I 9 0 r� L • STEWART&011,SSOCIATES Consulting Engineers and Surveyors November 6, 1989 Mr, Glen Schlueter Storm Water Utility City of Fort Collins P. 0. Box 580 Fort Collins, Colorado 80522 Dear Glen: I have surveyed the finish grade'elevations of the storm water detention pond located at the east edge of Tracts Four and Five of the Foothills Fashion Mall Expansion. This pond is just west of Stanford Road, and is .shown on Sheet 12 of 18 of the Utility Plans for the Foothills Fashion Mall Expansion Phase II. The planned outlet grate elevation was 4995.00, and the surveyed elevation is 4995.08. The overflow spillway elevation was planned to be 4997.40, and is surveyed as 4997.24. The required volume is 15782 cubic feet, and the revised plan volume of the pond was 17400 cubic feet. The volume I have calculated from our survey made November 6, 1989, is 17002 cubic feet. This as -built volume of 17002 cubic feet is less than the planned volume of 17400 cubic feet, .but it is quite a bit greater than the required volume of 15782 cubic feet; therefore, the pond is adequately constructed. Please call if you have any questions. Sincerely, Phillip I. Robinson, P.E. & L.S. Vice President jrr cc: Mr. Mike Herzig, City of Fort Collins Development Coordinator Mr. Ron Young, Everwest Partnership James H. Stewart and Associates, Inc. 214 N. Howes Street PO. Box 429 Ft. Collins, CC 80522 E DRAINAGE REPORT Im SATURN OF FORT COLLINS P.U.D. STEWART & ASSOCIATES, INC. • JULY 19, 1990 STEWART&&SSOCIATES Consulting Engineers and Surveyors July 19, 1990 Mr. Glen Schlueter, Storm Water Utility City of Fort Collins P 0 Box 580 Fort Collins, CO 80522 Dear Glen: This is the storm drainage report for Saturn of Fort Collins P.U.D. The site is for a proposed automobile dealership at the Southeast corner of South College Avenue and Foothills Parkway..' The site contains 0.713 acres and is zoned Highway Business. The building was previously occupied by Commercial Federal Savings and Loan. The site is located in the Foothills Drainage Basin. It was included in the Storm Drainage Study for the Foothills Fashion Mall Expansion prepared by Stewart and Associates, Inc. dated July 20, 1987. The Saturn of Fort Collins P.U.D. was a part of Area 12 and a part of Area 16 of the Fashion Mall Study. The proposed P.U.D. has only minor changes to the site plan as related to storm drainage runoff quantities. Approximately 1000 square feet of asphalt paving is being added on the West side of the building. Also, approximately 1200 square feet of turfstone is being added for automobile display on the East side of the building. The runoff coefficient for the existing site is 0.66 and the runoff coefficient for the proposed P.U.D. increases to 0.70. The impervious area increases by 3.2% and the turfstone area is 3.9%... The 2 year runoff increases by 0.07 c.f.s. and the 100 year runoff increases by 0.25 c.f.s. when the increase in impervious area takes place. This increase in flows increases the volume of runoff in the 2 year storm by 200 cubic feet and in the 100 year storm by 405 cubic feet. The detention pond that was built at the Northwest corner of vacated Foothills Parkway and Stanford Road has 1220 cubic feet greater detention capacity than required according to a letter from Phillip I. Robinson to you dated November 6, 1989. The additional volume in the detention pond will accomodate the 405 cubic feet. In the Foothills Mall Expansion study Areas 12 and 16 used a runoff coefficient of 1.0 and 0.95 respectfully to determine runoff. The North i of the proposed P.U.D. is located in Area 12 and its runoff flows to an existing inlet in the South curb of Foothills Parkway. The South z of the proposed P.U.D. is located in Area 16 and its runoff flows to an existing inlet at the Northerly most corner of the Sears front parking lot. James H. Stewart and Associates, Inc. 214 N. Howes Street PO. Box 429 Ft. Collins, CO80522 303/482-9331 • Saturn of Fort Collins P.U.D. Storm Drainage Report July 19, 1990 Page.2 Since the calculations for Areas 12 and 16 were made using the H.B. zoning coefficient of runoff and the actual coefficient for the existing site and proposed site are significantly less, we are requesting that no onsite detention be required. Likewise we are requesting that no basin fees be assessed. The Fashion Mall storm drainage system was determined in the Expansion study to be able to handle the runoff from Areas 12 and 16 and that runoff will not be exceeded by this proposal. The runoff calculations and the site plan and the Drainage Plan for the Foothills Fashion Mall are included as a part of this report. If you have any questions regarding the report or the requests for no onsite detention or basin fees, please call. Sincerely, ��,• A. awry<° Richard A. Rutherford, P.E. & L.S. ',, �P. �IST4 �/ President �� ^'t�•,0 lkk 5028 .0, o„- , SUBJECT _1A=l1,Pti1iL— 11�I��_G(i L1".!1t!„c`. pY_ �/ZrDATE17 —p Up--------------- --- SHEET NO.-------- -___ PROJECT • AREA pF ,I1rE = 0.7/3 Ac.. Z 0A/,UG - //,�R .ZMpEKvlous AfzEA = 0,4-07Ac, 57.101, C—X/sT/.Vc PGgv,oL,./ A eEA = O.3 o&,,l,. ¢Z,9 EXisTi,vG C xIJ 4 (0.4Z9 x O.z) = 0,6,6 a =MPE2 VIovf .f�2 Eq = 0,•430 60.3% �2oPoJ'Et� TV eF570,Vt A2E,o1 PE Q VI.OI%l E•y O, Z SS ss• d PRopoJe D = (01 t,03x 1) 4 .034Y 0•5) i- (D-�"8 x 0,2) = 0.70 US/ A76 �v= /0 MiU, S=Z.Z% L= 2PO ppop. -( zye = 0.70 X 2..5 x 0.7/3 I.zs c• F1. " Q loyk. = 0,70 x 4,4-Y 0,1/3 - ?•zo c•F,d, c� IOU 0,70 X 7 R 0,713 = 4.37 c.. F•S , GXIJ7'. Q zy7L = 0• 6 X Z•S x 0.7/ 3 _ 1.19 Q /0 ye O, G(, x 4-9- x 0. 7/3 = 2.07 F. s. Q /ooye = /.LSA6.6,4 X 7X 0, l/3 = 4-./Z c•FJ. 6%I&T. VOLUME 1oyp, = G)t�rr VOLuMS /00YR foPofED Vo Lume /p Yc PP-opwcD V0LUAIL /ooye O,GSX 0.L6X0.713X/80X(,0 3303 Gv.FT, / • OS X /. 2.S X 0, 66 X 0.7/3 X 18 D Y. 6 0 = 6 G 70 c u. F 7- p,(,SA 0.70 Y,0.7/_ y%8o Xco _ 3503 tu.=r• 0,'70 X 0,712Y, !9OX60 = 7075 Gu, r T I /OY,<s. 1/0LUxle:-:: Sn cn;9fij� :. Zno • CJ STEWART& SSOCATES Consulting Engineers and Surveyors STORM DRAINAGE REPORT FOOTHILLS FASHION MALL EXPANSION The Foothills Fashion Mall Expansion is located east of South College Avenue to Stanford Road and south of Swallow Road to Monroe Drive. The mall was constructed in 1973, and storm drains were constructed in the thalweg of the Foothills Basin. Most of the run—off from the Mall area goes to this storm drain. A portion of the drainage from the area south of Monroe Drive goes to Warren Lake. •Detention has been provided at Lemay Avenue for the Southmoor Village Subdivisions, which cover most of the Mall. The Arena area south of Monroe Drive drains to Warren Lake. Through an agreement between Mitchell and the Warren Lake Company, all drainage from the Arena area can be carried directly to Warren Lake. There is, however, a small area (2.04 acres) lying south of Monroe Drive which will not drain to Warren Lake and which apparently was not included in the Southmoor Village detention calculations. Detention quantity calculations for this 2.04 acres is shown on page 3 of this report. This 2.04 acres is to be paved as a part of the parking lot and will drain north through the Mall drain pans. We are providing a temporary detention pond for this added run—off in the parking lot at the southwest corner of Foothills Parkway and Stanford. There is an existing inlet at this point, and a berm will be constructed in the landscaped area to provide the necessary detention volume. Calculations for this are shown on page 9 of this report. A permanent detention pond to hold the volume required shall be constructed in the green area proposed at the northwest corner of Foothills Parkway and Stanford. This permanent pond will hold the required detention volume as per the calculations for Area 2 on page 5 of this report. There will be no significant changes in the existing drainage patterns along the Foothills Parkway area of the Mall. Also, there is no offsite contribution to this area. The Monroe drainage will be changed some by the construction of the parking lot and by the elimination of the west to east drain pan across Stanford Road. The 2.04 acre unpaved area now lying south of Monroe will be paved and will drain through the parking lot pan. The unpaved area at the present time probably does not drain due to the fact this is an isolated high point surrounded by curbs and raised pavement. The south half of existing Monroe Drive and one acre of the Chisholm site now drains across Stanford to the east in a pan at the south side of Monroe. This pan is to be eliminated and the water will be routed from the Stanford —Monroe intersection into the Mall drain pan running north along the west side of Stanford. Cross Sections and flow James H. Stewart and Associates, Inc. 214 N. Howes Street P.O. Box 429 Ft. Collins. C080522 3031482.9331 —I— • calculations for this pan are shown -on page 11 of this report. There are no off -site run-off contributions to the Monroe Drive area. College Avenue and the Larimer County No.. 2 Ditch stop the 100 year ,flow from the west. The run-off from the east half of College Avenue drains into the site on Foothills Parkway and on the north flow line of East Monroe, and is picked up by catch basins at the Larimer County No. 2 canal and over the existing 54 inch drain. The only part of the drainage from College Avenue which will be changed by this project is the flow onto the north flow line of East Monroe. Originally this flow (from 0.5 acres) went across Monroe to the south in a drain pan, and then into the Larimer County No. 2 Canal. The offsite street improvements require the removal of this drain pan, and so we have turned the drainage around the corner onto Monroe, and then through the Mall parking lot drainage system. The 0.5 acres is very small conpared to the total south parking lot drainage, and its affect on the overall drainage is insignificant. The attached map shows the Foothills Mall, Foothills Square and Arena areas. The contours shown on the map are finish contours. Also shown are existing and proposed storm drains. The new storm drains consist of an 18 inch line at the east end of the Foothills East area, relocation of 18 inch drain line under Mervyn's, a new 18 inch overflow line along the north side of Mervyn's, and some lines from the new catch basins to be constructed along Foothills Parkway. The map shows drainage sub basins, for which the drainage calculations are shown on the following calculations sheets. The area is divided into 18 sub basins which are shown and numbered on the attached map. Calculations for these basins are shown on the following calculation sheets. The area which drains south to the Horsetooth-Stanford intersection is 2.8 acres in size. We propose that this area drain in the west gutter of Stanford to the catch basins at the northwest corner of the intersection. This drainage quantity, gutter capacity and catch basin capacity are calculated on page 12 of this report. In conclusions, after doing the calculations, familiarizing myself with the site and going through previous drainage plans, I feel the Expansion of the Foothills Fashion Mall will make negligable changes on the downstream drainage. There are no off -site flows which will have any affect. The Foothills Parkway area (Phase II) all drains directly into the storm drainage system, therefore all potential drainage problems are easily solved in this area. The south parking lot, Phase I, has had problems in the past of the pavement deteriorating due to an asphalt drain swale on a fairly flat slope. The new plan proposes this drainage to be in a concrete drive and in concrete gutters and pans. Also the slope of the asphalt has been made steeper to create better flow to the' concrete swales. -2- !- COMPUTATIONS STEWART&ASSOCIATES CcnsuJfin3ErY3hwersaixi Surveyors 214 N. Howes St. Ft. Collins, CO 80521 (303) 482-9331 Date Z17-!G 6--Z Client: Sheet No. -3 - of 12 Chkd By: -Date Project: F00406- Subject — —S G ce Cc4cuJo�;^0i^-f n Wd 141 -J- Vr_- 1> '0 eci -3 /,Z 7:3 0 -711 70 34q-0 2-1 3 -J COMPUTATIONS STEWART&ASSOCiATES Corisulfing Fngineersand Surveyors (c;, r L/ h 47 64 214 N. Howes St. Ft. Collins, CO 80521 (303)482-9331 Pig —Date Client: —Sheet No. o! By: — Date Subject 1-5- Project: _00r�_h i 7_e (11h ex S47 r? 10 n? 1� 46 J rl inki: p lime :#-n v's 4- 1>e! r'e i aL c does n�1 j C) U n: er ;,tl e, r­ �/vnce�j S (f 0" 7 tfJoc<;�d710, T)-,/j t-IV d ter 0 tl> e 17 bui 11`45 1 C Ili 1p, COMPUTATIONS STEWART&ASSOCIATES Caistilting Er 3ineersard Surveyors 214 N. Howes St. Ft. Collins, CO 80521 (303) 482-9331 R Date _Z&C�1(9 7., Client: Sheet No. 5- of 11kd By: -Date Project: Feva-bith Pc? TJ7io'n' A4)) Subject S+o r_r'"\ D rG c n -5() b - 73c?s -J C. 1;'n, t CJr r "4 4-, ? 116) c- (J )il- 7, ti tz J i /,2r re C. a. 4-0 0-10 6 1) 1-7) 1 f: TI?is is C'Ce Th 1�' F I p 7 2,04- C, s i 1 r4-.:2- C_'r_ e +Ie rc� 111 If 41 ; vv)-f I, ck L/IJ v CIC Ai r to Z. ; 4i- Z- I; i LZ 1'Z 1 2 OOK/4- C.) L! CD li L+ W I l_..� C/ 0 • This. 0 : 0 L/K1 I 1 1 40 year so 44 4-4 � L'IlIl Tie 2- el cf S jl� Will Le�(l I CshLo 45 e 7Y'f "i COMPUTATIONS STEWART$ASSOCIATES Co is IWY3 Ery3ineers and Surveyors 214 N. Howes St:Ft. Collins, CO 80521 (303) 482-9331 DateClient:-✓ERwE'Si Sheet No. 6 of I2 dBy: Date Project: FUrrN)iils FCcS,,`)%G,, /14oi( �GnJiOM Subject r"Cr I nc>G e SihS 3}rec.I 2� 10.�9� I%4c� I G'fu c0 ct's Tbis; bASI:'. P'Q. Grl U I ifC! !/Z o f! tJ e VJc, C C;i ta.a i; j i I; I of e �✓ a�. ,l I ! 1 II I li I .I% ! I`LG• 4 .0 )I� i7)iL.j,7I. (11� `j CAST 1 {CIS 1ctre;.;C inle�%...wkrd�! '� I, I in �� a l ISI Ike I tlP�bcc�!i-�c�.rn clvS� e He 1 sad. -I_.. i :-I �C !o #5 /r��=� f. IIlkov ) e IS �xSs Qr4., ill.11 Iio�tC �eXl j70 ri I ! # It GlR i=(•yf)G2�� ��6,� I %S.4! c.��S I' I I � I r E iZ.,j l�Is ;is ie� 'I I �ri a�cl b itie !�rw4{i,Iit/ram I r,r!cl cei er%�r jn�lv(di pscd Io cij Ypr. The cTnea� ! 1 I ch x- n� I ^(i� there I ctrC I U al�ec` ! rid ! G�v�st'I'SI I f� a'i.^IG�,c�+._ IS1 hiJ iNleff drvgsi IrN40el /gkinil> ! 5'¢I Trcil0 1' ci4) sf rJFylrcp, The i�le� will( ic6rt� 5 3¢. � e o�e'i over l l�� 1olr! j i COMPUTATIONS STEWART&ASSOCIATES CanuRing Erv3ineersand Surveyors 214 N. Howes St. Ft. Collins, CO 80521 (303) 482.9331 Ppl Date 7 24(57 Client: F\/F_IZ L�/F_ S / Sheet No. _ 7 of ) Z hkd By: -Date' Project Feo h,W/s Fc-c on Me)( I=>(�parnSJUh Subject Sf o r"'� nrPiea I rt G��—1 J (/7� - 11i3GZ Sl n f #77 /fir` ! /;7�', G��Z _ 'G1.4 � j.qs)� �z.Z�i l�'�� -� 19;• d G-�s ! I � ! i I � � I i CJ Ti7is arecy qs �c11 � rt%1~'S )' 0 drtN�w�G�y.1 ICE drr, 0ns 4(1 i 1jC'i l ¢ �i vr� (h le I i- . I ,• ,I (�z G/�F C C2,I•�i � `l i... G�11 I. i I .i -. i i � j t r . � I9(1 ` 1 ,tI r IS II r. f�.I 0t1 rfe-� lU � SCE !n Pw( cl--`..._ Q n !rl S i q /�rec� aic I i L 1U .«r n CD%GI,nSI6 p0 n..©o/le' Gjw := G//? iC•9s) ��.•�( 1 � S) l� i Qwv �CI� '� ioVeir o� �0. �.! i C J �I,)��71,�i,�), I Thit ctr o I cks�i awl t�F r✓ 1 v Ar'ec.; '1z/ TAe G1 r0 GciC' 11��v}✓j �ilI.t�fS of•w, I v%yect�'l75 <%a�✓� IiIG �b;� .9� c��i 1'c p!c`^� cVnstr�JC. �' /S' GGt7iCZ basi �, wr��cl '. �i'll !.. p Ui iEr— up! Q-0.9 ��S wl;i til i,S j au foie IUI r. s}jr.nl a..� till l(ia e„�Sp��lp0 rovecgo- t�/lJ Qw i. �ci� (•Ys�C�4- 4Ko,q) � 3 8 ; ��s I ! I I � i _ � his ar is • �h ndrtr, wek%� !off Aceµ�G!(1 i f rk..lo I ..ia� � i� 47l0W t I 1 e , ' GtSlrr ;a'T j -i'�P ii�7�e.o��e!`!. l't �"�Gi v1' CP.I -T�Pl•�Iil Ll G' over-P0 ✓ i info �i is }�dsih Frog f�sC�s' 4 I6' C,��J il.� %m�i oule�-�Iow ' r he /UU Z .3 cFS vi fch wee I •a �cti iu .f s hS fro , A PA: 2` 10 'w1'iz s � oiai :v✓ 4; 9 e�J. i T�'is' wl�i! ir�rG'vl'Irr "I ..., - STEWART&ASSOCIATES COMPUTATIONS Consulting En3ineers and Surveyors 214 N. Howes St. Ft. Collins, CO 80521 (303) 482.9331 PIR Date / IO 7 Client: F�/FR wES r Sheet No._d—of I Z ChkdBy: Date Project: F0047W/1' F-a07i(LI ME11 Job No. E2cp6ns%oh Subject —.I>acl /is (11 II. .II`.._._b_.. j ..,,1 1 ! ! dv f cj ! r2. sh1 1IeI%- �! f0 I S _7I_I ! ! es .. ( .. ._ 1� i.. �i` on I I .-I l 1 o;�/ SI e 03c �� P to Tc. 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Collins, CO 80521 (303) 482-9331 Date Client: .E�/�1>z�✓FSi SheetNo._�L_of 1Z Chkd By: Date Project: FGZ7Tl7 i/IIS >Lct s h 1""0'^ Q 6I �Klr� gnSJy ti Subject S o i �i�t i na c� ( �(/p B as -( -,A S) COMPUTATIONS STEWART&ASSOCIATES CcHmdlin3 Erv3ineersancl Surveyors 214 N. Howes St. Ft. Collins, CO 80521 (303) 482-9331 )Ef 7-', Date 20 Client: Ly> R I✓;rS T Sheet No. 0 of ! Z By: Date Subject Project: i) S(1b —23ctsi ns r'ovlr�c#rAr-fU)�,1 !!IJ�i;i;� rGri c e�c i sir n51 I 'a�rd c%nia re' l!aii i r'fi carry 9.G Ic>Gs !beforerotler jo l CpCIA icpp Vol ff J Iljlli� ! ! will j rnc.{i... lex•.SI�-i"�� ce!. I T', eXis':S eJ IoVei- o:�l ,�( m Z>,�l... d}eleo, illl, ;�►' ,;i;l( � ! � �� I I I J.... i IG 'GI CY:IU(i L�GI.0 /•i = C.9n ! CIl 4)�;G.�) jC I��. C;•7 � i ZG.�C yes � •�t 9� e Fc j i I j �✓II( jfil '�ISI-�� L. �� Q Gi.F�1 C %te.�-�Jclls, Ir7U Th r I.7;rrig( 4sl pi l lob'. 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I / S VERS THAT �EOrme Nn oo `:� ' i Vj's 00 NOT G10749 - NE STORM SCWEaf OR STaEGTY d'.jS.. I I oLL ,wvv TRAc,(GD ONTO N F I tRUG ON SH i 1 /I OFF AT�TMFEYTHE F_niv OF FLNC / y MHO 115'-tl•OIRIGI➢E EACH E AONST m H. [If1 \ 0 .e'� n TOV N GRgp[ • o \ wORK Dill! ', o < �/ ° �! _ .[ . D F 1�1 W <l.l :' � die A•d) w[D ..�� ^AA _____ � F; y � .�JjI I � VI _ 9f \`� \ oi.. tiz t~�O �I/ CUTLERULT (Od4['� ..✓ / `� ti a \`\\ oo n ^ ekNi A SEE 4DCTAIL ON d[ET )4� T —_--------L _ ... O� j ^' _ -\ .� �R F��. a I kE.7/ Ta 6 cfs U,n a ``� 4� } /I / OUTLET TO 6E L.AnID$ 0 l O I DE1[NTruN FoREA TD o ��� Za• s- AND MAINTAINED D✓ OwNEa i IF _ ` F T O#uP OF OO p4LS FP S^b UnI MALL - � I _i� NwL Oc PoND' 97.E � ° REct ,wc VIREU VOLVE g791 �. W OR i ��\ y<.S - \\\ {11 eR _� , I oar6lnlAL Fueq VOwAE - III I ooU [V ry] w l REVISSO Po^D VOLVM[= /711.00 1,L om Zil"" o '�' SEE SHEET 16 FOR CATCH BASIN �' l P, / % CONSTRUCTION DETAILS s �' a/ NEW STORM DRAIN ELEVATIONS � �I .w z e 0 N .. C.S.o- 96.4 inlet invert IEI•' _ 960 scum invert 18" 93.77 tbwllne 6o"RCP - �,i': � \ \ 41sr C'• ' I 2.76 %trade i ^HRie' / �• /� C.BQR 972 inlet invert Jet 2. v i� vv Y 9north 18.H O ' / DO %grade O C.B& 96.0 inlet Invert Is" Z Q 92 Z mouth 1 lS" X 0- 922 ( grade M.H. d d 1.30%grade W ED V I '� dOTE `IV CUR65 L Q Q, <:i \ G� NAVa PoSIT/Je17 DRAIN?GE E,O Q REVISION NO .- _ Z REVISED LOCATION OF gJ`I JNLFV Lf Q Q V• ♦ ` l IN OISTII ION FOND c V [ E,�. I II ] ae"n" FIr[ wAs F oNP rn De �p MIOA[R THAN 340vN ON oR GIN.aL -_ ¢ Oo> z Q SQ Q \ LZ Z O a III MAY CO. �1 L; /l it [1 rLTY ��+, �OVAI rr z Z +� 44 c �.e T/< i Ill °wo MATCH LINE I� r / - .Lu• LI II L� MCI ...ore \ 12 of 18