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HomeMy WebLinkAboutDrainage Reports - 03/11/2004Final Apprc,•t,: d hep1ja MOP"MY OF FORT A:OUIN ■ FINAL DRAINAGE REPORT The Shops at Rigden Farm Ft. Collins, Colorado Prepared for: Wyatt and Associates, Inc. 1865 South Pearl Street Denver, CO 80210 Prepared by: Kimley-Horn and Associates, Inc. 950 Seventeenth St. Suite 1050 Denver, CO 80202 067831002 October,2003 CKimley-Hom and Associates, Inc. C Kimley-Horn and Associates, Inc, FINAL DRAINAGE REPORT The Shops at Rigden Farm Ft. Collins, Colorado Prepared for: Wyatt and Associates, Inc. 1865 South Pearl Street Denver, CO 80210 Prepared by: Kimley-Horn and Associates, Inc. 950 Seventeenth St. Suite 1050 Denver, CO 80202 061111/02 October, 2003 Mtrdey-Ham and Associates, Inc. Final Drainage Report The Shops at Rigden Farm ENGINEER'S CERTIFICATION...............................................................................................................1 ' VICINITY MAP (NOT TO SCALE)...........................................................................................................2 GENERAL LOCATION AND DESCRIPTION........................................................................................3 LOCATION.................................................................................................................................................3 DESCRIPTIONOF PROPERTY................................................................................................................3 DRAINAGE BASINS AND SUB-BASINS..................................................................................................4 MAJOR BASIN DESCRIPTION................................................................................................................4 SUB -BASIN DESCRIPTION......................................................................................................................4 BasinsCI —CIO, 0C1-0C4.................................................................................................................5 BasinsBI B11, 0B1-0B11...............................................................................................................5 BasinsAl A3, 0AI-0A4.................................................................:.................................................5 DRAINAGE DESIGN CRITERIA...............................................................................................................5 REGULATIONS.........................................................................................................................................5 HYDROLOGICALCRITERIA...................................................................................................................5 HYDRAULICCRITERIA...........................................................................................................................6 WAIVER/VARIANCE FROM CRITERIA.................................................................................................6 EROSIONCONTROL..................................................................................................................................6 DUSTABATEMENT........................................................................................................................................7 MAINTENANCE.........................................................................................................:.............................. •.....7 WETLAND PRESERVATION AND MITIGATION................................................................................7 CONCLUSIONS............................................................................................................................................8 COMPLIANCE WITH STANDARDS........................................................................................................8 DRAINAGECONCEPT..............................................................................................................................8 REFERENCES..............................................................................................................................................9 APPENDIX A — HYDROLOGIC COMPUTATIONS...............................................................................1 APPENDIX B — HYDRAULIC COMPUTATIONS...................................................................................2 Kimley-Horn and Associates, Inc. Final Drainage Report The Shops at Rigden Farm ENGINEER'S CERTIFICATION I hereby attest that this report for the final drainage design of The Shops at Rigden Farm was prepared by me, or under my direct supervision, in accordance with the provisions of the City of ' Fort Collins Storm Drainage Design Criteria for the responsible parties thereof. I understand that the City of Fort Collins does not and shall not assu • for drainage facilities designed by others. o�p00 REGI, . AY • Q R�• " 36252 ­4 NAl E��\ Carter R. Farley, P.E. ' Registered Professional Engineer ' State of Colorado No. 36252 M Kimley-Horn ' 1 and Associates, Inc. Final Drainage Report The Shops at Rigden Farm t IVICINITY MAP NOTTO SCALE\ s� $ 'xa' 4 ...... "_.: — &t� �......_,,. ,., /.. .�...«_. a., .. ... $«_• '' .:m'`�b......,.3` ... Eli— 26....m MULBERRY ST x — O m > in D �n n m PROSPECT RD. i 287 m z A SITE DRAKE RD 25 7 CUSTER DR`0 FRICZEN FARMS ARMS HORSE TOOTH RD HARMONY DR VICINITY MAP z❑Kimley-Horn and Associates, Inc. Final Drainage Report The Shops at Rigden Farm ■ (GENERAL LOCATION AIV�D DESCRIPTION a `�'i'r^' 'xt `�' ' `�' LOCATION The Shops at Rigden Farm is located in a part of the northwest quarter of Section 29, TS 7 N, R66W of the 60' Principal Meridian. This site is more particularly located in the southeast corner of Timberline Road and Drake Road. This site is part of the Overall Development plan for the Rigden Farm O.D.P prepared by JR Engineering dated November, 1999. This overall development plan is part of the "Foothills Basin (Basin G) Master Drainage Plan" by Resource Consultants, Inc. (1981). This site was further designed by the Final Drainage and Erosion Control Report for Rigden Farm — Filing Six by JR Engineering dated February 8, 2002. There is an existing drainage swale through the site within a drainage easement. The on -site easement will be vacated while the off -site portion will remain. The existing flows from this channel will be hard -piped within the proposed storm sewer with The Shops at Rigden Farm Filing Eight development and outlet at the east side of Illinois Drive. DESCRIPTION OF PROPERTY The Shops at Rigden Farms is 10.88 acres. Existing groundcover consists of native weeds and grasses along with cultivated fields. The soil conditions consist of 1-5 feet of man -placed fill overlaying 5 to 16 feet of lean clay with sand to lean sandy clay. Groundwater is encountered at approximate depths of 12 to 15 '/z feet below the ground surface. The site is located within Zone X of FIRM map of Larimer County community —panel number 080101.0193 E. The north portion of the site generally slopes to the southeast to the existing drainage swale. The lower (south) portion of the site drains to the northeast to the same drainage swale. The site is zoned Neighborhood Commercial and the development will be in general compliance with the Ft. Collins design criteria and construction standards. The Shops at Rigden Farm is a proposed commercial development that shall include a King Soopers grocery store along with a variety of retail shops, restaurants and parking. A public ' stormwater system shall be constructed within the site to service these developments. The surrounding developments are a multi -use project that will include other commercial, single- and multi -family residential, open space, and a community center. There will be no onsite detention ponds to collect the onsite runoff. The required detention per the City of Ft. Collins is included as part of the overall drainage plan for the entire Rigden Farm development. The Shops at Rigden Farm will comply with the Overall Development Plan provided by JR Engineering (November, 1999) and the Final Drainage and Erosion Control Report for Rigden Farm — Filing Six. ❑�� Kimley-Horn 3 � and Associates, Inc. Final Drainage Report The Shops at Rigden Farm IIDRAINAGE BASINS ANDTSUB MAJOR BASIN DESCRIPTION The Shops at Rigden Farm is approximately 14 acres before ROW dedication. It is located Reach 2 of the Foothill Drainage Basin which is part of the "Foothills Basin (Basin G) Master Drainage Plan". Proposed drainage of this development shall follow the existing patterns closely. The site has been graded to drain into three separate major basins (Basins SB-1, SB-2, and SB-3) within the site. The three basins have been divided to duplicate basins proposed in the Final Drainage and Erosion Control Report for Rigden Farm — Filing Six. • SB_1 Major Basin SB-1 will include approximately 3.6 acres of onsite runoff, which includes some offsite flows that drain into the system. The flows from this basin will be routed via storm sewer to a storm sewer stub being designed by JR Engineering at the intersection of Limon Dr and Illinois Dr. This storm system will outlet into a proposed stormwater system within Drake Street. The flows will then be routed into pond 216 of the Overall Drainage Plan for Rigden Farm, which outfalls in the Cache La Poudre River. SW2 Major Basin SB-2 will include approximate 8.4 acres of onsite drainage as well as street flows from the Timberline Road and an existing clay drain tile line. The onsite runoff from this major basin will outlet into an existing drainage swale to the east of the site. This swale will be improved to an existing outlet pipe that will connect into a series of water quality ponds that is part of the Overall Drainage Plan for Rigden Farm. In particular, the ponds will be number 212, 217, and 218 of the report by JR Engineering. These ponds will outfall into the Foothills Regional pond that connects to the Fossil Creek Reservoir Inlet Ditch (FCRID) SB-3 Major Basin SB-3 will include approximate 2.0 acres. The runoff within this basin will be collected into a proposed onsite drainage system that will outfall into an existing storm system south of Custer Drive. The stormwater system south of Custer Drive is not detained as per the "Foothills Basin Drainage Master Plan". This undetained runoff will outfall into the Foothills Regional Channel and the FCRID.. SUB -BASIN DESCRIPTION The Shops at Rigden Farm will be increasing the imperviousness of the area. This increase in imperviousness has been addressed in the design of the site. The Overall Drainage Plan and Rigden Farm Filing Six produced by JR Engineering have accounted for in this development with offsite detention ponds in various locations within the overall Rigden Farm development. These ponds will release at a controlled release rate and will allow the sediments to settle out prior to releasing into the appropriate channels to the FCRID. CMIlKim and Associates, Inc. Final Drainage Report The Shops at Rigden Farm Basins CI—C10, OC1—OC4 These basins include the northern one third of the site and make up the Major Basin SB-1. These sub -basins include the King Soopers building and the connected retail buildings. Also included within this basin are the northern portions of Illinois Drive. These basins will collect the runoff from the roofs of the above mentioned buildings and the parking/access areas to the north of the building. These flows will be routed via storm drain as mentioned in major basin SB-1 description. Basins B1—B11, OB1—OB11 These basins include the middle one third of the site and comprise Major Basin SB-2. These sub - basins include the parking lot, Timberlane Road flows, existing clay tile, and one retail building. The runoff from these basins will be collected and routed to an existing drainage swale directly east of the site. The swale will have an outlet that routes the flows to a series of water quality ponds per the Rigden Farm Filing Six drainage report. Basins Al—A3, OA1—OA4 These basins include the southern one third of the site and make up the Major Basin SB-3. These sub -basins include the parking lot and the future buildings that are to be determined. The runoff from these basins will be collected and routed to an existing drainage catch basin at the northwest corner of Custer Drive and proposed Illinois Drive. ;DRAINAGE DESIGN:CRITERIA ��_� ' .. .�� � REGULATIONS The proposed storm drainage system within this development is in general compliance with the Storm Drainage Design Criteria and Construction Standards —Updated April-1999. This development has also referenced the Overall Drainage Plan for Rigden Farm O.D.P., as prepared by JR Engineering dated November, 1999 and the Final Drainage and Erosion Control Report — Filing Six — Updated February 2002. Supplementing the aforementioned codes, Urban Drainage Flood Control District Volumes 1, 2 and 3 have been applied in the layout and design of the stormwater system, the erosion control, and best management practices. HYDROLOGICAL CRITERIA Based upon the Storm Drainage Design Criteria and Construction Standards, this commercial development is required to design for the 10-year and 100-year storm frequencies. This site was designed to be in compliance with the findings of Final Drainage and Erosion Control Report — Filing Six. That drainage report rerouted a number of basins from the ODP Drainage Plan. By prorating the findings in the Filing Six report to match the site boundaries of Rigden Eighth, it was determined that there were 9.69 (CA) acres allotted to this site for discharge to the Rigden Six/ODP system. Based on our analysis of the site using Ft. Collins standards, there are 9.84 (CA) acres from basins SB-1 and SB-2 (B and C basins) flowing into the Rigden Six system. The remaining portion of the Rigden Eight site, basin SB-3 (A basin) accounts for 1.83 (CA) acres. This acreage is less than the allotment by the original ODP Drainage Report of 2.46 (CA) acres. ❑_"Kimley-Horn 5 and Associates, Inc. Final Drainage Report The Shops at Rigden Farm The Rational Method was utilized in the design of the system. The Rational Method is as follows: Q=CIA Q = Flows in cubic feet per second (cfs) C = Coefficient of runoff established by City of Ft. Collins I = Rainfall intensity — established by City of Ft. Collins IDF Curves A = Area of basins (acres) Commercial runoff coefficients were utilized in calculating the flows of the basins of The Shops at Rigden Farm. Time of concentration and runoff calculations for developed flows can be found in the Appendix. HYDRAULIC CRITERIA The stormwater system is required to be designed to convey the 10-year rainfall. We have reviewed the site and provided stormwater system that has been sized to accept the 100-year event with minimal ponding within the parking lot. The layout and capacities of this system have been input into Stormcad to verify the capacity of the pipes and the hydraulic grade line. See these calculations in the Appendix. WAIVERIVARIANCE FROM CRITERIA No waivers or variances from the Criteria are required. EROSION d NO TROL ��` � � ...�. .. _ ,T ..x. �t'.is. _ ;..'..>' � �' 4.TssaK. rz..,.,... �'.?'$u@� tx , - �u--,14 ',,� ' Erosion control for The Shops at Rigden Farm has been designed per Section 2.2.2.2 and Section 8 of the Storm Drainage Design Criteria and Construction Standards of the City of Fort Collins, Colorado, dated May 1984. Erosion control was established by Final Drainage and Erosion Control Report, dated February 2002. Stormwater quality and erosion control measures have been also addressed by applying Best Management Practices in general accordance with Urban Drainage Volume 3. The site will be constructed during spring to early fall. The site erosion control plan has been established to minimize the runoff due to snow melt, wind, and rainfall erosion. The measures are designed to limit the overall sediment yield increase due to construction, as required by the City of Fort Collins. The stormwater inlets shall have straw bales placed around them until the area is paved, and then rock gravel filters (inlet protection) shall be installed to prevent the fines from entering the system. Silt fence shall be placed on the perimeter of the site. Stabilized, gravel construction entrances, per the Final Drainage and Erosion Control Report, shall be placed at the northern and southern entrances to the site and shall have a base material consisting of 6" coarse aggregate. ❑KImIA%Horn and Associates, Inc. Final Drainage Report The Shops at Rigden Farm The outlots that are to be developed in the future shall have surface roughening done to them and then shall be seeded and mulched as a permanent measure. Landscaping shall be installed in the islands within the parking lot as permanent measure. Permanent stabilization, according to Final Drainage and Erosion Control Report, shall be provided. "A vegetative cover shall be established within one and one-half years on disturbed areas and soil stockpiles not otherwise permanently stabilized. Vegetation shall not be considered established until a ground cover is achieved which is demonstrated to be mature enough to control soil erosion to the satisfaction of the City Inspector and to survive severe weather conditions." There are two existing swales to the east of the proposed development. One is located in the northeast corner of the site and the other is toward the middle of the site. The proposed drainage swale to the middle east of the site will be re -graded to drain from the proposed onsite drainage system. The outlet will have a concrete flared -end section with riprap to dissipate the flows into the Swale. A cutoff wall will be included to reduce scour. The re -graded swale will have straw bales located within the bottom of the swale to minimize erosion. Permanent erosion control ■ measures include re -vegetation of the native seed to protect the integrity of the drainage channel. DUSTABATEMENT Per the Final Drainage and Erosion Control Report, "During the performance of the work required by these specifications or any operations appurtenant thereto, whether on right-of-way provided by the City or elsewhere, the Contractor shall famish all labor, equipment, materials, and means required. The Contractor shall carry out proper efficient measures wherever and as necessary to reduce dust nuisance, and to prevent dust nuisance that has originated from his operations from damaging crops, orchards, cultivated fields, and dwellings, or causing nuisance to persons. The Contractor will be held liable for any damage resulting from dust originating from his operations under these specifications on right-of-way or elsewhere." MAINTENANCE Per the Final Drainage and Erosion Control Report, "All temporary and permanent erosion and sediment control practices must be maintained and repaired as needed to assure continued performance of their intended function. Straw bale dikes or silt fences will require periodic replacement. Sediment traps (behind straw bale barriers) shall be cleaned when accumulated sediments equal approximately one-half of trap storage capacity. Maintenance is the responsibility of the developer." Erosion control effectiveness, rainfall performance calculations and a construction schedule are provided in Appendix L, per the Final Drainage and Erosion Control Report — Filing Six. NTT LAND_PRESERVATION AND,MITIGATION Not applicable to this project. ❑�❑ Kimley-Horn 7 � and Associates, Inc. Final Drainage Report The Shops at Rigden Farm ■ .CONCLUSIONS x f h : s s t 1 ' COMPLIANCE WITH STANDARDS The Shops at Rigden Farm is in general compliance with City criteria for storm water design. Being a part of the Foothills Drainage Basin has been taken into account with the design of the system for this development and is in general compliance with its concepts. Urban Drainage Flood Control District Manuals Volume 1, 2 and 3 have been utilized in the placement of best management practices and design of the stormwater system regarding imperviousness and runoff coefficients. ' DRAINAGE CONCEPT The stormwater system shall help control the drainage of the downstream system. This development fits within the general design and criteria put forward in the Overall Drainage Plan for the Rigden Farm O.D.P and Final Drainage and Erosion Control Report — Filing Six. rWjjK1 and Associates, Inc. Final Drainage Report The Shops at Rigden Farm REFERENCES: Final Drainage and Erosion Control Report: Rigden Farm — Filing Six, JR Engineering, Revised February 8, 2002. Overall Drainage Plan For Ridden Farm, JR Engineering. November, 1999. Storm Drainage Design Criteria and Construction Standards, May, 1984. (Including Supplements from April, 1999). Urban Storm Drainage Criteria Manual, Volumes 1.2 and 3, Urban Drainage and Flood Control District, Denver, CO. March 2001. Kimley-Horn 9 ❑Wriand Associates, Inc. Preliminary Drainage Report ' The Shops at Rigden Farm Y IWO, 0,0 Ott", * V2� zt �xt e, r 4� Inv: 3 NATIONAL FLOOD' 1WRANCE PROGRAM FIRM" - 7 FLOOD: INSURANCE RATE MAP ARIMER COUNTY, COLORADO (UNINCORPORATED AREAS) ELEVATION RE06 .ELEVATION MARK M-Nevo) Ftm Is At ft�m wsaof oil City of Fort Collins Rainfall Intensity -Duration -Frequency Table for using the Rational Method (5 minutes — 30 minutes) Figure 3-1a.. 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Q � n a ..1 6 x m � F+ c pq G a'�„YP C r C 'N C C „ O C G O {� S .. h gi m m m ro m m m m m m m w m m a v�Di Zo" .a.� ro m m m m m m U O O O O O O O - C O O O O O O O G O C O C O C O G O G O O p V y F 0 O vpi O vi o Sri O h o h o h O o vi Sri 0 0 vi vi vi 0 vi O vi O vi vi r �o �c n vi j�jLC O (� O O O C O O O G O �v}i mo ' q O m m ry q YI P. Q r S n n Y VI q ON q -0N a O O O C G G O O O O O O O O C O C O O o 0 0 0 o c c = o 0 0 0 0 0 o c o o c o o c o c o o c o � P O O O o O 0 0 0 a N ry N N N N N N 0 ONgV C"z 6 6- 8 ' Preliminary Drainage Report The Shops at Rigden Farm ' f - 2Q G(I;-7CO11APUT��IIQN`�� MlMe Base pp / --------------------- -- ---- --_ ,, f � i S�- Sow i4 ,,,:---- III 1!� it iriliIllIll -----------------------_1-----------------------�I_______ ___— - x---- ------ JR Engineering 2620 E. Prospect Rd., Ste. 190 Fort Collins, CO 8525 LOCATION: Rigden JJ PROJECT NO: 9164.12 and 9164.15 COMPUTATIONS BY: A So -and DATE: 7�a� M MC f Recommended Runoff Coefficients from Table 3-3 of City of Fort Collins Design Criteria Recommended % Impervious from Urban Storm Drainage Criteria Manual Streets, parking lots (asphalt): 0.95 10( Sidewalks (concrete): 0.95 96 Lawns (flat Q%, sandy soil): 0.10 0 General multi -famfy area: 0.85 70 General single-familyarea: 0.85 55 General uommerdcal area: 0.85 90 SU89ASIN TOTAL I TOTAL SIDEWALK. PAVED LANDSCAPI MULTI- SINGLE- COMMER. RUNOFF % bESIGNATION AREA AREA AREA. AREA AREA FAMILY FAMILY AREA COEFF. Impervious (aa) (sq.ft) (sq.ft) (sq.ft) (sq.ft) (IMIA) (sgJt) (sq.ft) (C) �-- os-1 2.19 95,548 7.348 47473 11,726 0 0 0 0.58 56 OS-I+OS•2 4.16 181.378 4348 44473 41,726 0 0 85,830 0.71 72 OS-21 1.97 85.830 0 e 85.830 0 0 0 0.10 0 0S3 6.55 285, 195 0 0 0 0 0 285,195 0.8.5 90 0", 6.55 265, 195 O 0 285,195 0 0 0 0.10 0 OS-4 2.41 105.117 0 0 0 0 0 105,117 0.85 90 OS-4• 2.41 1019,117 0 0 105,117 0 0 0 0.10 0 OS-5 3.11 135.452 0 0 0 0 0 135,452 0.85 90 OSS' 3.11 135,452 0 0 134452 0 0 0 0.10 0 OS6' 0.76 33,031 0 0 33,031 0 0 0 0.10 0. OS-7 1.14 49,810 0 0 0 0 0 49,810 0.85 90 Os-7• 1.14 49,810 0 0 49.810 0 0 0 0.10 0 03.8 0-16 11,429 0 0. 0 0 11,429 0 0.65 55 OS-9 1.02 44.522 0 0 0 0 44.522 0 0.65 55 OS-10. 0.67 29,087 0 0 0 0 29,087 0. 0.65 M OS-11 1.33 58,140 0 0 0 0 58,140 0 0.65 55 ' OS-12 0.55 23,779 0 1 0 0 0 23,779 0 0.65 55 OS-13 4.4118Z251 40,464 22,328 0 129.459 1 0 0.65 5e OS•14 2.14 91319 21,238 - 10,918 0 31,162 0 0./8 41 OS-15 1.02 44.539 10,026 0 0 34,513 0 0.72 65 OS-16 1.06 48,139 10.426 0 0 35,713 0 0.72 65 OS-17 0.87 37,901 23.508 0 0 14,393 0 0.64 83 08-18 IA2 79476 49,294 0 0 30.182 0 0.84 83 OS-19 1.73 75.348 f0,394 0 55,939 0 9,013 0 0.28 20 R-115a 1.4a 64.481 16,240 0 0 46241 0 0.73 66 R-123 0.82 .35,812 0 35,812 0 0 0 0.10 0 R-124 2.62 114.161 30,000 84,161 . 0 0 0 0.32 28 R-125 0.80 34,782 10,782 24,000 0 0 0 0.36 31 11 basn r+mes: basin 119 from Rigden Farm Filing One Is encompassed If basins OS-13, OS-14 and 173. 9asings RI15a to R-125 are from Filing One. The numbers for these basins are from the Filing One report. Equations - Calculated C coefficients $ % Impervious are area weighted C=F(Ci Af)/At Ci = runoff coefficient for spedfic area, Al Ai = areas of surface with runoff coefficient of Ci n = number of different surfaces to consider 9164Row.lds Page 5 -famfy area: 0.85 70 General single-familyarea: 0.85 55 General uommerdcal area: 0.85 90 SU89ASIN TOTAL I TOTAL SIDEWALK. PAVED LANDSCAPI MULTI- SINGLE- COMMER. RUNOFF % bESIGNATION AREA AREA AREA. AREA AREA FAMILY FAMILY AREA COEFF. Impervious (aa) (sq.ft) (sq.ft) (sq.ft) (sq.ft) (IMIA) (sgJt) (sq.ft) (C) �-- os-1 2.19 95,548 7.348 47473 11,726 0 0 0 0.58 56 OS-I+OS•2 4.16 181.378 4348 44473 41,726 0 0 85,830 0.71 72 OS-21 1.97 85.830 0 e 85.830 0 0 0 0.10 0 0S3 6.55 285, 195 0 0 0 0 0 285,195 0.8.5 90 0", 6.55 265, 195 O 0 285,195 0 0 0 0.10 0 OS-4 2.41 105.117 0 0 0 0 0 105,117 0.85 90 OS-4• 2.41 1019,117 0 0 105,117 0 0 0 0.10 0 OS-5 3.11 135.452 0 0 0 0 0 135,452 0.85 90 OSS' 3.11 135,452 0 0 134452 0 0 0 0.10 0 OS6' 0.76 33,031 0 0 33,031 0 0 0 0.10 0. OS-7 1.14 49,810 0 0 0 0 0 49,810 0.85 90 Os-7• 1.14 49,810 0 0 49.810 0 0 0 0.10 0 03.8 0-16 11,429 0 0. 0 0 11,429 0 0.65 55 OS-9 1.02 44.522 0 0 0 0 44.522 0 0.65 55 OS-10. 0.67 29,087 0 0 0 0 29,087 0. 0.65 M OS-11 1.33 58,140 0 0 0 0 58,140 0 0.65 55 ' OS-12 0.55 23,779 0 1 0 0 0 23,779 0 0.65 55 OS-13 4.4118Z251 40,464 22,328 0 129.459 1 0 0.65 5e OS•14 2.14 91319 21,238 - 10,918 0 31,162 0 0./8 41 OS-15 1.02 44.539 10,026 0 0 34,513 0 0.72 65 OS-16 1.06 48,139 10.426 0 0 35,713 0 0.72 65 OS-17 0.87 37,901 23.508 0 0 14,393 0 0.64 83 08-18 IA2 79476 49,294 0 0 30.182 0 0.84 83 OS-19 1.73 75.348 f0,394 0 55,939 0 9,013 0 0.28 20 R-115a 1.4a 64.481 16,240 0 0 46241 0 0.73 66 R-123 0.82 .35,812 0 35,812 0 0 0 0.10 0 R-124 2.62 114.161 30,000 84,161 . 0 0 0 0.32 28 R-125 0.80 34,782 10,782 24,000 0 0 0 0.36 31 11 basn r+mes: basin 119 from Rigden Farm Filing One Is encompassed If basins OS-13, OS-14 and 173. 9asings RI15a to R-125 are from Filing One. The numbers for these basins are from the Filing One report. Equations - Calculated C coefficients $ % Impervious are area weighted C=F(Ci Af)/At Ci = runoff coefficient for spedfic area, Al Ai = areas of surface with runoff coefficient of Ci n = number of different surfaces to consider 9164Row.lds Page 5 basn r+mes: basin 119 from Rigden Farm Filing One Is encompassed If basins OS-13, OS-14 and 173. 9asings RI15a to R-125 are from Filing One. The numbers for these basins are from the Filing One report. Equations - Calculated C coefficients $ % Impervious are area weighted C=F(Ci Af)/At Ci = runoff coefficient for spedfic area, Al Ai = areas of surface with runoff coefficient of Ci n = number of different surfaces to consider 9164Row.lds Page 5 in p A W N O 0 W J W A W Z j/ymr Z A A � (n O N O N vOi S A W I.t N IU + N O m O w co $ $ V W g A N fJ N N Ul N , p W q A co a N n fJ ++ O O N+ N+ O N O O O+ O A+ tT g r W 0 A O W g N V ro mJ + W N NON O 01 W g:j+ J v W m (� W 3 0 0 0 0 0 0 0 0 00000000000000000000 �= nm �W J V m W ape 1p1pJJ J j A 0 0 0 0 0 (y� 0 N O O O N g W O q q q q q m 01 4i Na2 a O C C G O M G O G O C G _ O O C C G N O G G to C O O O C fll N N++ q++++ PIN L f0 A A A V N W J tJN m+ W 'Cl A O f0 N V OD A IJ O N GI q W N Q _m q ++++ o 0 o+000bo+ _.+000000000+o a2 v C 101 a 3 A 0 0 0 o 0J 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 imics 0 0 p c (aI (T 61 ( o w g o ccceabccg�$333�wSeccoo W W +m a 0) 'm J�' �° m W g m m m m W m g q m W m m q W m m b 0 O N O N O + + + O + + + + + N N O O + + + + O + + + + N + q 6 WN N O mmm NV q q O N mq W + O O dKIWIP'l WpWNNqtWT r o S mmO tOn P O W 0 WV d O W P f + tH V O W N A W+ N O O m 0 Oe A O g W W q q q Q Y IJ m W W V A 0 m 0 A V q 10 W W i0 t!1 G f0 Y q A A Cl C A C F{� III law! N O � O � E Oe Oo � � m O+e mpIqWAmf m q ID O � � N t0)� + � p r W Z 5 om + + A W (o q WN+ N N N+ ++ N N iJ W W.. M. m 0 P A ip Ci ip m WE intl� W W P W Jm W 0 L. O IJ + O + g V O W N 0 N N+ V N N N++ O O W 0 W g O q q q (T q q A A IJ Ge W (p V P N m 0 4 V N 41 fJ OI fT fD V fll G 0 G tT iJ G G W G A. fp P M>40o8 f17 .3p zz^� O O z y QI R 2 I JR Engineering 2620 E. Prospect Rd., Ste. 190 Fort Collins, CO 80525 RATIONAL METHOD PEAK RUNOFF (City of Fort Collins,10-Yr Storm) { LOCATION: Rigden II ' PROJECT NO: 9164.12 and 9164.15 COMPUTATIONS BY: B. Strand DATE: 7/25/01 ' 10 yr storm, Cf = 1.00 DIRECT RUNOFF Design Tributary ' Point Sub -basin 1 10 ' 102 2 102+204 103 3 103+205 ' 4 104 105 6 106 7 107 ' 6 108 9 109 110 10 110+206 2 0. tc 8.5 4.64 6.19 '-• III 0.78 0.67 11.5 3.59 1.88 11 111+208 0.99 0.70 11.5 3.59 247 112 . 1.47 0.66 12.3 3.48 3.39 i 12 J 112+209 1.86 0.70 123 3.48 4.50 13 113. 255 0.67 125 3.46 5.86 - 114 2.23 0.31 7.7 420 2.91 14 114, 202, 203. 0S-4' 5.90 0.33 11.4 3.60 8.92 ' 14d 114,202,203,OS-4,OS-3 1244. 0.75 f 129 3.41 1 31.75 0-1 OS-1' 219 0.58 9.9 3.81 4.84 OS-1+OS-2 4.16 0.71 124 3.47 10.21 ' OS-2' 1.97 0.10 33.7 204 0.40 OS-3 6.55 0.85 .. 10.3 3.76 20.94 - OS3' 6.55 0.10 37.3 1.91 1.25 ' 0-4 OS-4 241 0.85 5.8 421 9.41 OS-4- 241 0.10 21.2 .266 0.84 OS-5 3.11 0.85 7.8 4.18 11.05 O&W 3.11 0.10 32:7 208 0.65 ' OSa' 0.76 0.10 42.6 1.76 0.13 OS-7 1.14 0,85 5.0 4.87 4.73 OS•7' 1.14 0.10 24.3 2.47 0.28 0-7 ' 0.7' 095, OS-7 OS-13, OS-5-7 425 15.72 0.85 0.17 8.3 31.2 4.08 214 14.76 5.60 Q=ClCw tt "� ' 91"'ftw.xts Design Potrd 0 = peak discharge (cfs) C = runoff coefficient Ct = frequency adjustment factor i = rainfall intensity (in/hr) from City of Fort Collins IDF curve (4/16/99) A = drainage area (acres) t = 41.44 1 (10+ tc)e'7p71 .11.05 0.65 0.13 4.73 0.28 14.76 15' Type R Inlet JR Engineering 2620 E. Prospect Rd, ste. t9D Fort Coffins. CO $0525 RATIONAL METHOD PEAK RUNOFF (City of Fort Collins,100•Yr Storm) LOCATION: Rigden II PROJECT NO: 9164.12 and 9164.15 COMPUTATIONS BY: B. Strand DATE: 7/25/01 100 yr storm, Cf = 1.25 �DIRECT l R OFF CARRY OVER TOTAL REMARKS ee. Are, A CC( to 1 0(too) from ((100) 0(100Ho( Point Oestgn. (ae) (min) Qnfir) (ds) oewr Point (oh) (as) 2M 0.34 On 6.0 9.05 .296 3.0 224 224 0.31 1 0.81 1 &0 9.96 2.47 2.5 5' Type R Intel 225 225 029 0.94 6.0 9.95 2.67 2.7 F Type R We( 226 0.32 0.82 1 5.0 9.76 2.55 2.8 227 029 0.94 5.0 9.li5 2.71 27 2� 228 0.44 0.85 5.3 9.60 356 169,170,230 14.06 17.6 10' Type R Mkt 229 229 In 0.94 10.6 7.59 1323 132 10' Type R Inlet 230 230 1.40 0.94 7A 6.87 11.37 0-19 3.72 15.1 Single Combo We( 0 = peak discharge (efs) C = runoff coeffident I = rainfall intensity (inlhr) from City of Fort Collins IDF curve (4116/99) A = drainage area (acres) 1- 84.682 / (16. tcf 14 91Bd0ow:rds ya�vT' DRAINAGE SUMMARY TABLE Design Tributary siArea C (2) C (10) C (iool to (z) tc (to) t0 (100) Q(2)tot Q(10)tot 8ub-0asin G(100)tot ORAIWiOE Point STRUCTURE (ac) (min) (min) (min) (c1s) ICU) (a AMMARK, M � os 5' 3.11 0.10 0.00 0.19 327 0.0 321 0,4 0.00 1.7 OS4t• 0.78 0.f0 0.00 0.13 121 0.0 41.6 0.2 0.00 0.3 OS 7 1.14 0.85 0.00 1.00 5.0 0.0 5.0 2.8 0.00 11.1 06•T 1.14 0.10 0.00 0.13 24.3 0.0 23.8 0-2 0.00 0.7 )", 0S•7 426 0.85 0.00 1.00 8S 0.0 8.B 18.1 0.00 88.7 •13, 0S-5.7 1&72 0.17 0.00 021 312 0.0 90.8 3.3 0.00 14.4 0S-8 0.28 0.85 WA 0.81 fi.0 WA 8.0 OS WA 2.1 OS49 1.02 0.85 WA 0.81 8 5 WA fi.0 1.7 WA 8.3 OS•10 0.07 0.8 IIIIIIII�08 0..1 5.0 WA 5.0 12 WA 54 05-11 . 5.0 WA 5.0 25 WA 10.8 05-12 0.65 0.65 WA 0.81 5.0 WA 5.0 1.0 WA 4.4 0S-13 4.41 0.65 WA 0.61 10.5 WA 9.0 82 WA 29.0 0S•14 2.14 0.48 WA 0.60 18.6 WA 1b.4 1.8 WA 82 05-16 1.02 .0.72 WA 0.90 6.0 N/A 5.0 21 WA 9.1 05-16 1,08 0.72 WA 0.B0 5.0 WA S.0 22 WA 9b OS-17 O.B7 0.84 WA 1.00 6.9 WA 5.0 19 WA 8.7 OS-18 1.82 0.84 WA 1.00 6.0 WA 5.0 ' 42 WA 182 OS-19 1.73 1 020 WA 0.35 172 WA 17-2 09 WA 3.7 Page 4 ' Preliminary Drainage Report The Shops at Rigden Farm '�IDE:B- HYDRO, L�IN1 &> 0 Y LZ d 8Z d e-d cc m LL N c m V v CD CD i �ma 0m om_ c L° o Nco CO V3 yvo ?%o H m� ro to n 05 0 N M 0yy 0M N n O '6 m 0 y t0 N N tp V N n i N O v O OD O CD 0 r0- 11 O n M N O �.00'0 M N m�N > C N N N N N N N 0 O) 0) O W of O) o) o) S J a a a a d a a a a j c Ln n O N N N r0 f0 r• co O 7 0? M M e( ,0 m 06 n r: r: r, r� P.: W -0 E TU' J N N N N N N N N N o) O) O Of 0) D) 13i O 0 d d d d d V d d a m m N O N 000 N O O m .-. lox O 01 O� O O N N N N N N M M y—� OOOOOOOMO 0 0 0 0 00 00 0 0 v O C O O C C O 6 0 U m 4 .V Mrnaornrnv0 V) d M e{ M N M N (D W m O �l .- O f'i O M O 0 M V' ¢>-0v jq N M r` co co M N Q Q ¢ QcU� to It O -1 N 0 000000oZZ ¢ ¢ C C C'4D O 01 m Cn O O O O O O O O Z Z 0 m v m 0_K U co v N M 0o a M Q Q f0 N y Q U rD N O 'ItN O Z Z 0 6 0 0 0 06 C O E O M O N r` 0 0 O N N" M tD f0 lO c V r- 0 N M O M 0" J I-- E C O ONi N OOD 007 (NO NW m m A !D O rD N 00 N rD N r0 m _—ru CA CA CA 0) CA ci CA O) ci a d It v a 7 a 7 '7 c r` O O rr N, CO t: O f0 W d N O N N N M N 0 �p ^ f0 rn 00 m m N N N N c>> N N N N N N N N N 3cm rnaDrnrnrnmrnmrn O w V v v v a V v v V c o 3z Q f? c? 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(.0 CP r%oft (.0 U.) C5 cf) a) E Q E Mo. :3 .j 0 LO N 0 M cc LL C 0-0 '0 CD cl LO M co 0 T to 0 c 0 a 0 2 V■ 'N ^ /O CO I..L V V ON • ■ �.�• • ■ V E E MENNIMIg Co.. Of in O O O O O O O O O O 06 I` ' c qI ti ti C � C 62 �O i '. tf •— O �j>oNQ W C M W ��� . NO — ■ ■ .JDr.Jco(/� m E o Y U) a m N to N n NN 4 Fa E C N LL C cc m d D D a �ma DO y C N O V 0�o c E cn •y-Do �o m. � O O �r r ~N a) 0) HMO 0 0) -� ..tea; SEE Jil�fn � O LO N M 0) Urnqt /1• � i i[ • • E J �(n O O O O O O O O O O O O O O m = •� OO I` N r V 7600 CO .. > >MNO cc 0) co 0 N 0-CO NO JD0Jfn(A N m w N O O Z N O v a �a E� Op i (D U m E o Y N c c W w f a 0 Lb 0 N i m D 0 0 cU U C Fw E C N C c m m a: m n. f2DID _c .. N N co cc cEr� Y � O i O A i \O F- 6 Final Drainage Report The Shops at Rigden Farm , „ APPENDIX,C 'EROSION CONTROL WORKSHEETS Kimley-Horn M and Associates, Inc. I I I RIGDEN FARM 8th FILING THE SHOPS AT RIGDEN FARMS RAINFALL PERFORMANCE STANDARD EVALUATION Project: Rigden Farm 8th Filing STANDARD FORM A Completed By: DJM Date: 12/09/2003 Developed Erodibility Asb Lsb Ssb Ai'Li Ai'Si Lb Sb PS Subbasin Zone (AC) (FT) N (FT) N N Al Moderate 0.56 130 2.0 72.8 1.1 A2 Moderate 0.48 170 2.0 81.6 1.0 A3 Moderate 0.52 230 1.3 119.6 0.7 OA1 Moderate 0.24 205 2.0 49.2 0.5 OA2 Moderate 0.19 195 2.0 37.1 0.4 OA3 Moderate 0.03 65 2.0 2.0 0.1 OA4 Moderate 0.07 80 2.0 5.6 0.1 131 Moderate 1.67 330 2.6 551.1 4.3 B2 Moderate 0.39 165 1.1 64.4 0.4 B3 Moderate 0.12 120 2.0 14.4 0.2 B4 Moderate 0.86 200 2.0 172.0 1.7 B5 Moderate 0.19 90 2.0 17.1 0.4 B6 Moderate 0.83 190 2.0 157.7 1.7 B7 Moderate 0.57 190 2.0 108.3 1.1 B8 Moderate 0.32 140 2.0 44.8 0.6 B9 Moderate 0.24 140 3.4 33.6 0.8 B10 Moderate 0.15 110 2.0 16.5 0.3 B11 Moderate 0.08 140 1.3 11.2 0.1 OB1 Moderate 1.44 600 2.0 864.0 2.9 OB2 Moderate 0.57 350 1.1 199.5 0.6 OB3 Moderate 0.21 100 2.5 21.0 0.5 OB4 Moderate 0.16 150 1.0 24.0 0.2 OB5 Moderate 0.27 200 0.7 54.0 0.2 OB6 Moderate 0.04 60 2.5 2.4 0.1 OB7 Moderate 0.04 60 2.9 2.4 0.1 OB8 Moderate 0.26 80 3.7 20.8 1.0 OB9 Moderate 0.20 150 4.9 30.0 1.0 OB10 Moderate 0.01 40 2.0 0.4 0.0 OB11 Moderate 0.03 50 2.0 1.5 0.1 C1 Moderate 0.04 50 2.0 2.0 0.1 C2 Moderate 0.03 40 2.0 1.2 0.1 C3 Moderate 0.27 110 2.0 29.7 0.5 C4 Moderate 1:53 150 0.8 229.5 1.2 C5 Moderate 0.21 150 4.0 31.5 0.8 C6 Moderate 0.09 70 3.6 6.3 0.3 C7 Moderate 0.10 80 2.0 8.0 0.2 C8 Moderate 0.18 110 2.0 19.8 0.4 C9 Moderate 0.09 90 3.0 8.1 0.3 C10 Moderate 0.61 130 2.0 79.3 1.2 OC1 Moderate 0.23 130 2.0 29.9 0.5 OC2 Moderate 0.23 120 2.0 27.6 0.5 OC3 Moderate 0.06 70 2.0 4.2 0.1 OC4 Moderate 0.02 40 2.0 0.8 0.0 UD1 Moderate 0.29 80 2.0 23.2 0.6 UD2 Moderate 0.08 140 2.0 11.2 0.2 TOTAL 1 1 14.80 1 1 1 3291.2 1 29.1 222.4 1 2.0 1 79.6% Asb = Sub -basin Area Lsb = Sub -basin flow path length Lb = Average flow path length = sum (Ai"Li)/sum(Ai) Ssb = Sub -basin slope Sb = Average slope = sum (Ai'Si)/sum(Ai) JOB NO.: 067831002 CADocuments and SettingsWaniel.madrugaWy DocumentslBookl I gO Z LL Q J Z J L D j m �¢t_m zo Wz aid (7 w V FtS X W f0 t701NAb Nl70AN0NNbbO�bb NO�NYNbb0010-0ly 0 0 0 O N O N O � N -No N O NO)b O N O W W O 00. O O O N O O O O O O O O O O O O 66.6 O O O O O O O O N O O O O O O O O O O O O N 09 Q N 0 Q W G Z Q FO m X XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX �bAyNY i a m W AbOb�bbb�yTy b N N O m N b 0 d 0 ObNN Y A� O ydy N 0 �OWO�O+Oqq��0Y000)gOq � m b m m W O� O N 0 0 0 �y�ybpp 0 OAl t7 0 1pppl1 pl N m=bmAmOAA N m m� m 0g 0 n LL W 8 bNbbb�Nd�-NybbbbdNbbt+l�(��MN�b��NOI N o N •- O O O N OI O b Y N N O b N 0 0 N 0 0 0 0 �-MAbbbmdNOl 0 b 0 0 �- O N 0 b�-YY 0 0 0 0 (p 0 O O O O o o O 0 0 0 0 0 o 0 o o 0 0 o 0 do 0 o o C o 6 6 6 0 0 0 0 0 0 0 6 6 6 6 0 0 Z Ti LL c LL m Z W Y p06bAANNOO�OIA NdbbyyA�bAYYbO�NdNAll N N 0 0 0 0 N �O10 In N O b01�NNbNbb 0 O b N N 0 0 0 O C C O O C — G O O O O O 00000 O O — O O0 O O G C O C o C O O � N LL J m z y m X x m N N y »F 8 0 m E m & p" V O N y� F W� X XXX XXX X X X X X X XXx 0 J LL O h lxx W � W F N z is w — `o �0 <a xxxxxxxxx xxxxx X xx xxxxxxxx x x xxxxx Wr ww a NO UU c OE 0 OW �D 0000 0o0 oo9go b b SbbbY G N 0 0 A O N N ]�Oe000�0 LL g0000 O o a W c O W �n000000bo Q U 'o ...... O 0 .. LL JL O K O C 02 UQ� y� WZ W O A W A � 8o,CoRp F�qR: N OOt7AAmN0�01 m m O) N O O b N A f9ANdbbyA�bAYYbO�Md b b N N �. O d YJ N. N O O N N 0 0 0 ON b o Z¢jNOM0000 TNJJWOQ b W ] �m € a 3 ma C- Q N00000co.O0000000000� NW0p N NO OoNNO0V 00 00NO0N00 cq m o c o o0000�lo-00NOdNN0 000000 < �m my � � N J e0 oa a�<mg _ mmm'm mmmmm'�1°mm'm mm ^m mmmmci Fi IIc5II8c"i�� ao cII Do F � �N 0000 mm00000000000 0000» 0 p RIGDEN FARM 8th FILING THE SHOPS AT RIGDEN FARM CONSTRUCTION SEQUENCE Project: Rigden Farm 8th Filing Completed By: DJM STANDARD FORM C DATE: 12/09/2003 Indicate by use of a bar line or symbols when erosion control measures will be installed. Major modifications to an approved schedule may require submitting a new schedule for approval by the City Engineer. YEAR MONTH 2004 1 2 3 4 5 6 7 8 9 10 11 12 Demolition Grading Wind Erosion Control: Soil Roughing Perimeter Barrier Additional Barriers Vegetative Methods Soil Sealant Other Rainfall Erosion Control Structural: Sediment Trap/Basin Inlet Filters Straw Barriers Silt Fence Barriers Sand Bags Bare Soil Preparation Contour Furrows Terracing Ash halt/Concrete Paving Other Ve atative: Permanent Seed Planting Mulching/Sealant Temporary Seed Planting Sad Installation Nettin s/Mats/Blankets Other STRUCTURES: INSTALLED BY: MAINTAINED BY: VEGATATION/MULCHING CONTRACTOR: DATE SUBMITTED: APPROVED BY CITY OF FORT COLLINS ON: JOB NO.: 067831002 G:LLand_DeN67831002_King_Soopers_Rigden_Farmstadrrin0minagelErosion ControlAs RIGDEN FARM 8th FILING THE SHOPS AT RIGDEN FARM EROSION CONTROL OPINION OF PROBABLE COST Erosion Control Measures Item Description jUnits I Unit Cost lQuantity ITotal Cost 1 Temporary Seed & Mulch Acre $655.00 0.85 $556.75 2 Silt Fence LF $3.00 3250 $9,750.00 3 Gravel Construction Entrance Each $500.00 2 $1,000.00 4 Inlet Protection Each $250.00 30 $7,500.00 5 Straw Bales LF $3.25 120 1390.00 6 Sediment Trap I Each 1 $500.001 0 $0.00 COST $19,196.75 Citv Reseedina Cost for Total Site Area Item Description jUnits I Unit Cost lQuantity ITotal Cost 1 Reseed/Mulch I Acre 1 $615.001 10.881 $6,691.20 COST $6,691.20 SECURITY DEPOSIT 196.75 JOB NO.: 067831002 C:\Documents and Settings\daniel.madruga\My Documents\Book1 COMPLETED BY: DJM E 4 " C 121 —3 , an av i E A)f------------ 1\\ Ilr 0.09 1 , f _5 1 � 1 KING SOGPERSH] 1 O.Oa 1 h1 1 1 1 1 I � 1 JI C P w 1 ]l0 1 1 � -.. I 1 � 1 I • • f _A I �_1 I 1 RRTAMB Y-9PO4, , l I E 1 1 _-__.� • �_ ,CC 1 019 1 on �1 1 1 [�y 1 1 1 4 • Ed I • I I r 1 t taT i A i 1Z OB 6 i OB o. � � 0 1 o.aa °°• r e F 1 / x 1 i 1 • B 7 1 I 1 1 '.Q I OSJ as 1 1 1 1 1 1 � 1 I 1 1 I 1 r, - 1 ,. 1 � ♦T 3 9 0 9 6 1 `_ FIRSTBANK , i o.6e 1 1 6 3Po f I 1 a1z 1 - A 1 n `. 1 OB-2 i %A 1 os6 �1 057 B 2 A 3 q 04 , 1 J ' an 1 LOT] _1 _ T _�' 1 `i 1 UTUREPAD IT IURLPAD I 1 OB-3 i Oz1 ° 1MEE 'JD 1 1 1' 0z °'____ . 1 1 1 I 1 I _ 1 _ 1 • CUSTER DRIVE -- -- • 1 RETAILC _ . 1 ¢ 6 1 B 9 1 1 0 p — 1 {0 T I ' FUTURFPAD E LOTI J d ---T- 1 1 D, 1 •.1 1 ♦ 1 j DI RE PAD LOT SUMMARY RUNOFF TABLE • SUMMARY RUNOFF TABLE I {cl F.r a a• 3 " I 4OCa o.Oz °� I • " a • • • • No was., K •.aa ja•L iaauia6� LIMON DRIVE i 1 OA-2 moo FOXrt W X MO utFA NC 1 COEFFICIENT 1 EutlIIO COEFFIGFN YEAN COE IA EN (NEYEAN) i (IONCENTRATION RVNOFF 16YEDN RUNOFF 1 1 eor UMYEAJE 0] 00 ON an 00 s0 1.1) u x A6 5] ON ON 60 1 Cal m. O.Es am IN 60 la tm 5 TAG O» 0» aN Ow ON Iw a ON am N an °W ° oW ON ON 032 m 6 e 061 e0 ea s 0.6] 0n E. 21 to ON I W s0 O.N Ed 11 N ON on s0 u N Dee 091 s0 1 o IN 13 m G sa 0 m aN aN so 351 ve $10 14 m 057 O IS a ME O W so 2» « .ea sN is a ME am so 154 Em 16 M ox oN s0 104 1e Na o otl oM s0 0.51 ON oN Bit o» o1e 0.« ]1 0.13 D.« 024 to w1 1« a.n a.n 0 a e.• 491 5.10 CoDID 0.57 0.74 a.n 0 w at 161 1.0 337 oN Ox+ aM ae1 0IN OY a IN n 0It an ON 0Q 072 aN 0n ON o.N 1NE am aN ] o m ] On ON ON 0.7 012 a ]O M 0" O» ON 0 ad so 110 IN 1 n 0» ON aN ON ON Im » + OD+ an a0 ow 00 oN » R aN aN Om » ao an cis a.m0 19 CIE am ON m Cx ON 0.15 016 0 19 Ed 00 am ON 9] Q o9 031 1 N OW » PIP IN ON O.N W M n: e A Cs Ox+ 1 on I » e1 0. s 120 » ON ON ON oW 0.e2 ON Ad 0 0 ON ON 1L0 a es 00 076 9 CA 0 B O.N ON 1 0 111u » 1W » C10 aI0 aN s0 1.W e0 CC1 ® ON ON sa Oe] 1 ax a.N LN 60 ON aJ DCs aN Na au as AD w+ a» a.ace ee LEGEND - A BAN DESIGNALM A B=AREA IN ACRES B a C-COMPOSITE RUNOFF COEFFICIENTS (10YR) D D-COMPOSITE RUNOFF COEFFICIENTS (100YR) EQ E=DESIGN POINT DESIGNATION BASIN BOUNDARY NORTH GRAPHIC SCALE a 1'EET I I rch 60 It L 1 = EXISTING CONTOUR UTILITY PLAN APPROVAL \1 , OA-4 1 yQ 007 °m - STORM MANHOLE 1m 6 - A ` STORM INLET CIECIt®BM --- CALL UTILITY NOPFlCAPON -:- ®� CENTER OF COLORADO S� Date OA 3 cIECR®Bry PROJECT a an ws 0 �GPTMT,a1ad 53 6700 NNaIR Date O6J631001 02 -67 It CIECIt® B! DRIVING NAME uLL 1 u wautrt 'IT° c� De1e 6000RN ce uwuw ui ne°iA`Age" uOXu u1 NNE CHECX® Br. _ D.i1P C12at 56 --_ —DRA-ROAD - - - F - 0 - of NORTH GRAPHIC SCALE TR s ) o I eKe . m tt z NOT _ DIN OR Ed y U se D O ..eP �R z w �_ LL > N_ .� $S 0 A O U 3 LEGEND: v ? a O 8 a - .• N Y " SILT FENCE ¢ $, u .. . LIMON DRIVE ,_. --_- STORM DRAIN i A EXISTING CONTOUR ttz ROW 9`o e .10 PROPOSED CONTOUR x If CONSTRUCTION ENTRANCE Y UT SIP INLET PROTECTION 4 i c Gi DP _Iv s IOWA DRIVE IS A rNTu•e NOTv Q CONTROL OL OR OWA MIA Q95B STRAW BALE BARRIER `c E T e[ .00FFSs[o AT A ®®®®® MULCHING C: IF v u,ry on,e ® C w LP D —V SEEDING Lo LOW EIGHT 3 ,.m LL I D 6 V N W I - w P em m I \ LP w me DRW a aw ' � �. RIP -RAP 01T5 Q mm o 0 I T �j° __ Z LL a J '.i Z od 'j LL LLJ U, qa J F� _ n rOto0 F ( aoC9mo t I �MiZ 0z �Fzp I aa°Ov LL T,o Z, ZuZ -�U L. _,. Q cn P cD fn p �= w P IP Q - GE .I City of Fort Collins, Colorado UTILITY PLAN APPROVAL Iv -P ARNYBT - Ir JI CAI -- JI J 1 L, T jCHEOKEI aN tc6 u Date CUSTER DRIVE CALL UTILITY NORIICARON cica®en �— Date CENTER OF COLORA➢O �`1-800-922-1987 0 ®�''O. PROJECT mei Dem REJECTN OR K4-670010 CHECNED of � Dade DRAWING NAME ®""` s2CECP ae ON nGWUE GYED(E3BP Awfa JILTED Date C13oT 56