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HomeMy WebLinkAboutReports - Final Drainage - 06/03/2025 PRELIMINARY DRAINAGE AND EROSION CONTROL REPORT for BANK OF AMERICA 2413 S. College Avenue Fort Collins, CO 80525 Prepared For: NELSON 906 W McDermott Dr Allen, TX 75013 Contact: Harry Koutsis Prepared By: Langan Engineering and Environmental Services, LLC 300 Union Boulevard, Suite 405 Lakewood, CO 80228 G. Robert Adams, PE, CPESC Professional Engineer License No. 51524 June 3, 2025 Project No. 532045801 As p h a l t , Co n c r e t e , Ro o f t o p Gr a v e l La w n s , Cl a y e y S o i l , Av g S l o p e 2- 7 % 0.95 0.50 0.25 X-01 0.002 0.004 0.014 0.020 0.37 X-02 0.95 0.05 0.03 1.03 0.91 X-03 0.06 0.04 0.10 0.67 X-04 0.28 0.01 0.006 0.30 0.92 X-05 0.33 0.01 0.05 0.39 0.85 0.00 1.626 0.07 0.14 1.84 0.88 PRE-DEVELOPED COMPOSITE RUNOFF COEFFICIENTS Dr a i n a g e A r e a Nu m b e r To t a l A r e s (a c r e s ) Co m p o s i t e R u n o f f Co e f f i c i e n t 𝑊𝑄𝐶𝑉=𝑎(0.91𝑖− 1.19𝑖+ 0.78𝑖) 𝐼 𝑉=𝑊𝑄𝐶𝑉 12 𝐴× 1.2 United States Department of Agriculture A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants Custom Soil Resource Report for Larimer County Area, Colorado Bank of America, 2413 S College Ave, Fort Collins, CO 80525 Natural Resources Conservation Service April 24, 2025 Soil Map The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. Also presented are various metadata about data used to produce the map, and a description of each soil map unit. 5 6 Custom Soil Resource Report Soil Map 44 8 9 3 5 0 44 8 9 3 6 0 44 8 9 3 7 0 44 8 9 3 8 0 44 8 9 3 9 0 44 8 9 4 0 0 44 8 9 4 1 0 44 8 9 4 2 0 44 8 9 4 3 0 44 8 9 4 4 0 44 8 9 4 5 0 44 8 9 3 5 0 44 8 9 3 6 0 44 8 9 3 7 0 44 8 9 3 8 0 44 8 9 3 9 0 44 8 9 4 0 0 44 8 9 4 1 0 44 8 9 4 2 0 44 8 9 4 3 0 44 8 9 4 4 0 44 8 9 4 5 0 493400 493410 493420 493430 493440 493450 493460 493470 493400 493410 493420 493430 493440 493450 493460 493470 40° 33' 20'' N 10 5 ° 4 ' 4 0 ' ' W 40° 33' 20'' N 10 5 ° 4 ' 3 7 ' ' W 40° 33' 17'' N 10 5 ° 4 ' 4 0 ' ' W 40° 33' 17'' N 10 5 ° 4 ' 3 7 ' ' W N Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84 0 25 50 100 150 Feet 0 5 10 20 30 Meters Map Scale: 1:524 if printed on A portrait (8.5" x 11") sheet. Soil Map may not be valid at this scale. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Larimer County Area, Colorado Survey Area Data: Version 19, Aug 29, 2024 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jul 2, 2021—Aug 25, 2021 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Custom Soil Resource Report 7 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 73 Nunn clay loam, 0 to 1 percent slopes 1.3 100.0% Totals for Area of Interest 1.3 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. Custom Soil Resource Report 8 An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha-Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. Custom Soil Resource Report 9 Larimer County Area, Colorado 73—Nunn clay loam, 0 to 1 percent slopes Map Unit Setting National map unit symbol: 2tlng Elevation: 4,100 to 5,700 feet Mean annual precipitation: 14 to 15 inches Mean annual air temperature: 48 to 52 degrees F Frost-free period: 135 to 152 days Farmland classification: Prime farmland if irrigated Map Unit Composition Nunn and similar soils:85 percent Minor components:15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Nunn Setting Landform:Terraces Landform position (three-dimensional):Tread Down-slope shape:Linear Across-slope shape:Linear Parent material:Pleistocene aged alluvium and/or eolian deposits Typical profile Ap - 0 to 6 inches: clay loam Bt1 - 6 to 10 inches: clay loam Bt2 - 10 to 26 inches: clay loam Btk - 26 to 31 inches: clay loam Bk1 - 31 to 47 inches: loam Bk2 - 47 to 80 inches: loam Properties and qualities Slope:0 to 1 percent Depth to restrictive feature:More than 80 inches Drainage class:Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water (Ksat):Moderately low to moderately high (0.06 to 0.20 in/hr) Depth to water table:More than 80 inches Frequency of flooding:None Frequency of ponding:None Calcium carbonate, maximum content:7 percent Maximum salinity:Nonsaline (0.1 to 1.0 mmhos/cm) Sodium adsorption ratio, maximum:0.5 Available water supply, 0 to 60 inches: High (about 9.1 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: C Ecological site: R067BY042CO - Clayey Plains Hydric soil rating: No Custom Soil Resource Report 10 Minor Components Heldt Percent of map unit:10 percent Landform:Terraces Landform position (three-dimensional):Tread Down-slope shape:Linear Across-slope shape:Linear Ecological site:R067BY042CO - Clayey Plains Hydric soil rating: No Wages Percent of map unit:5 percent Landform:Terraces Landform position (three-dimensional):Tread Down-slope shape:Linear Across-slope shape:Linear Ecological site:R067BY002CO - Loamy Plains Hydric soil rating: No Custom Soil Resource Report 11 SITE LOCATION ME ± 5020.40TI ME ± 5019.00TC ME ± 5018.60TP ME ± 5019.30TC ME ± 5018.80TP ME ± 5018.95TC ME ± 5018.55TP ME ± 5018.50TP ME ± 5021.60TP ME ± 5021.60TC ME ± 5021.10TP ME ± 5020.05TPME ± 5020.45TPME ± 5020.85TPME ± 5021.25TP ME ± 5017.85TI 5019.00TC 5018.50TP 5019.85TC 5019.35TP 5019.30TC 5018.80TP 5019.30TC 5018.80TP 5018.65TC 5018.15TP ME ± 5019.10TC ME ± 5018.60TP ME ± 5018.60TP 5019.00TC 5018.50TP 5018.80TC 5018.30TP 5020.70TP 5021.20TC 5020.70TP 5021.55TC 5021.05TP 5021.55TC 5021.05TP 5022.00FF 5021.95TP 5021.95FG 5019.85TC 5019.35TP 5022.00FF 5022.00FF 5022.00FF 5022.00FF 5022.00FF 5021.85TP 5021.95TP 5021.85TC 5021.35TP 5021.90TC 5021.40TP 5021.35TC 5020.85TP ME ± 5022.00TP ME ± 5022.00TP ME ± 5021.00TP 5019.85TI ME ± 5020.50TC ME ± 5020.00TP ME ± 5018.35TP 5020.00TC 5019.50TP 5021.35TC 5020.85TP 5021.25TC 5020.75TP 5021.90TC 5021.40TP 5021.70TP 5021.65TP 5021.20TP 5021.15TP 5022.90TC 5021.40TP 5020.75TP 5021.90TC 5021.40 TP 5021.55TC 5021.05TP 5021.50TC 5020.00TP5021.60TC 5021.10TP 5021.35TC 5020.85TP 5021.30TP 5022.00TC 5021.50TP 5021.50TC 5021.00TP 5021.80TC 5021.30TP 5021.65TC 5021.15TP 5021.55TC 5021.05TP 5021.00TP 5020.95TP 5021.05TP 5021.55TP 5021.50TP 5020.70TP 5021.20TP 5021.45TP 5021.50TP 5021.25TP ME ± 5020.00FG 5021.70TP 5021.50TP 20' DR A I N A G E EASE M E N T (REC E P T I O N N O . 20240 0 3 9 3 2 5 ) HANDICAP PARKING SIGNS CONSTRUCTION FENCE 20' PEDESTRIAN ACCESS & UTILITY EASEMENT (RECEPTION NO. 20240039325) 11' PUBLIC R.O.W. (RECEPTION NO. 20240039325) SOUTH COLLEGE SHOPS(STUCCO SIGN) DUMPSTER 20 ' E M E R G E N C Y AC C E S S E A S E M E N T & A C C E S S E A S E M E N T BO O K 1 9 4 6 , P A G E 7 5 7 8.5' 8.9' 8.7' 9.0' 3.4' BRICK WALL AREA UNDER CONSTRUCTION 1" WIDE STUCCO WALL 15 ' U T I L I T Y E A S E M E N T (R E C E P T I O N N O . 2 0 2 3 0 0 3 5 9 9 5 ) 24' PUBLIC R.O.W. (RECEPTION NO. 20230035995) 30' PUBLIC ACCESS EASEMENT (RECEPTION NO. 20230035995) INCA CUSTOMER PARKING ONLY SIGNS 24' RECIPROCAL EASEMENT AGREEMENT TO DILLON COMPANIES LLC (RECEPTION NO. 20230020881) 17.5' EMERGENCY ACCESS EASEMENT & ACCESS EASEMENT (RECEPTION NO. 20240039325) 22' UTILITY EASEMENT (RECEPTION NO. 20240039325) 6' UTILITY EASEMENT (BOOK 1462, PAGE 890) 15' PSC UTILITY EASEMENT (BOOK 1946, PAGE 757) 30' DRAINAGE EASEMENT (RECEPTION NO. 20110028622) 15' UTILITY EASEMENT (BOOK 1462, PAGE 890) 5' UTILITY EASEMENT (RECEPTION NO. 98073456) (RECEPTION NO. 98073456) 1.7'x1.7' COLUMN 1.7'x1.7' COLUMN 1.7'x1.7' COLUMN 1.7'x1.7' COLUMN 1.7'x1.7' COLUMN 1.7'x1.7' COLUMN CUT-OFF PIPE W/ELECTRICAL BOX TREE STUMP GROUND LIGHT 31 ' E M E R G E N C Y AC C E S S E A S E M E N T & A C C E S S E A S E M E N T (R E C E P T I O N N O . 2 0 2 4 0 0 3 9 3 2 5 ) 9' U T I L I T Y E A S E M E N T (R E C E P T I O N N O . 2 0 2 3 0 0 3 5 9 9 5 ) RAMPRAMP RAMP RA M P RA M P HANDICAP RAMP RAMP BENCH BIKE RACK 6' UTILITY EASEMENT (BOOK 1462, PAGE 890) CONCRETE SIDEWALK GRAVEL GRAVEL BUILDING FOOTPRINT AT GROUND LEVEL BUILDING EAVE/OVERHANG 6' U T I L I T Y E A S E M E N T BO O K 1 4 5 1 , P A G E 7 0 1 5.0' (RECEPTION NO. 770323) 32.0' 15.0' 37' UTILITY EASEMENT (RECEPTION NO. 20240039325) 49 ' 27.0' 5.0'32.0' 5.0'21.0' 26.0' 502 1 5019 50 1 9 5019 5018 5019 5018 5019 5019 5021 50 2 1 50 2 2 502 2 5022 5022 5021 502 2 50 2 2 50 2 1 5023 5020 50 2 0 50 2 0 50 2 0 50 2 0 50 2 0 5020 5025 50 2 5 5019 20' DR A I N A G E EASE M E N T (REC E P T I O N N O . 20240 0 3 9 3 2 5 ) HANDICAP PARKING SIGNS CONSTRUCTION FENCE 20' PEDESTRIAN ACCESS & UTILITY EASEMENT (RECEPTION NO. 20240039325) 11' PUBLIC R.O.W. (RECEPTION NO. 20240039325) SOUTH COLLEGE SHOPS(STUCCO SIGN) DUMPSTER 20 ' E M E R G E N C Y AC C E S S E A S E M E N T & A C C E S S E A S E M E N T BO O K 1 9 4 6 , P A G E 7 5 7 8.5' 8.9' 8.7' 9.0' 3.4' BRICK WALL AREA UNDER CONSTRUCTION 1" WIDE STUCCO WALL 15 ' U T I L I T Y E A S E M E N T (R E C E P T I O N N O . 2 0 2 3 0 0 3 5 9 9 5 ) 24' PUBLIC R.O.W. (RECEPTION NO. 20230035995) 30' PUBLIC ACCESS EASEMENT (RECEPTION NO. 20230035995) INCA CUSTOMER PARKING ONLY SIGNS 24' RECIPROCAL EASEMENT AGREEMENT TO DILLON COMPANIES LLC (RECEPTION NO. 20230020881) 17.5' EMERGENCY ACCESS EASEMENT & ACCESS EASEMENT (RECEPTION NO. 20240039325) 22' UTILITY EASEMENT (RECEPTION NO. 20240039325) 6' UTILITY EASEMENT (BOOK 1462, PAGE 890) 15' PSC UTILITY EASEMENT (BOOK 1946, PAGE 757) 30' DRAINAGE EASEMENT (RECEPTION NO. 20110028622) 15' UTILITY EASEMENT (BOOK 1462, PAGE 890) 5' UTILITY EASEMENT (RECEPTION NO. 98073456) (RECEPTION NO. 98073456) 1.7'x1.7' COLUMN 1.7'x1.7' COLUMN 1.7'x1.7' COLUMN 1.7'x1.7' COLUMN 1.7'x1.7' COLUMN 1.7'x1.7' COLUMN CUT-OFF PIPE W/ELECTRICAL BOX TREE STUMP GROUND LIGHT 31 ' E M E R G E N C Y AC C E S S E A S E M E N T & A C C E S S E A S E M E N T (R E C E P T I O N N O . 2 0 2 4 0 0 3 9 3 2 5 ) 9' U T I L I T Y E A S E M E N T (R E C E P T I O N N O . 2 0 2 3 0 0 3 5 9 9 5 ) RAMPRAMP RAMP RA M P RA M P HANDICAP RAMP RAMP BENCH BIKE RACK 6' UTILITY EASEMENT (BOOK 1462, PAGE 890) CONCRETE SIDEWALK GRAVEL GRAVEL BUILDING FOOTPRINT AT GROUND LEVEL BUILDING EAVE/OVERHANG 6' U T I L I T Y E A S E M E N T BO O K 1 4 5 1 , P A G E 7 0 1 5.0' (RECEPTION NO. 770323) 32.0' 15.0' 37' UTILITY EASEMENT (RECEPTION NO. 20240039325) 49 ' 27.0' 5.0'32.0' 5.0'21.0' 26.0' 502 1 5019 50 1 9 5019 5018 5019 5018 5019 5019 5021 50 2 1 50 2 2 502 2 5022 5022 5021 502 2 50 2 2 50 2 1 5023 5020 50 2 0 50 2 0 50 2 0 50 2 0 50 2 0 5020 5025 50 2 5 5019 ME ± 5020.40TI ME ± 5019.00TC ME ± 5018.60TP ME ± 5019.30TC ME ± 5018.80TP ME ± 5018.95TC ME ± 5018.55TP ME ± 5018.50TP ME ± 5021.60TP ME ± 5021.60TC ME ± 5021.10TP ME ± 5020.05TPME ± 5020.45TPME ± 5020.85TPME ± 5021.25TP ME ± 5017.85TI 5019.00TC 5018.50TP 5019.85TC 5019.35TP 5019.30TC 5018.80TP 5019.30TC 5018.80TP 5018.65TC 5018.15TP ME ± 5019.10TC ME ± 5018.60TP ME ± 5018.60TP 5019.00TC 5018.50TP 5018.80TC 5018.30TP 5020.70TP 5021.20TC 5020.70TP 5021.55TC 5021.05TP 5021.55TC 5021.05TP 5022.00FF 5021.95TP 5021.95FG 5019.85TC 5019.35TP 5022.00FF 5022.00FF 5022.00FF 5022.00FF 5022.00FF 5021.85TP 5021.95TP 5021.85TC 5021.35TP 5021.90TC 5021.40TP 5021.35TC 5020.85TP ME ± 5022.00TP ME ± 5022.00TP ME ± 5021.00TP 5019.85TI ME ± 5020.50TC ME ± 5020.00TP ME ± 5018.35TP 5020.00TC 5019.50TP 5021.35TC 5020.85TP 5021.25TC 5020.75TP 5021.90TC 5021.40TP 5021.70TP 5021.65TP 5021.20TP 5021.15TP 5022.90TC 5021.40TP 5020.75TP 5021.90TC 5021.40 TP 5021.55TC 5021.05TP 5021.50TC 5020.00TP5021.60TC 5021.10TP 5021.35TC 5020.85TP 5021.30TP 5022.00TC 5021.50TP 5021.50TC 5021.00TP 5021.80TC 5021.30TP 5021.65TC 5021.15TP 5021.55TC 5021.05TP 5021.00TP 5020.95TP 5021.05TP 5021.55TP 5021.50TP 5020.70TP 5021.20TP 5021.45TP 5021.50TP 5021.25TP ME ± 5020.00FG 5021.70TP 5021.50TP 20' D R A I N A G E EASE M E N T (REC E P T I O N N O . 20240 0 3 9 3 2 5 ) CONSTRUCTION FENCE 20' PEDESTRIAN ACCESS & UTILITY EASEMENT (RECEPTION NO. 20240039325) 11' PUBLIC R.O.W. (RECEPTION NO. 20240039325) SOUTH COLLEGE SHOPS(STUCCO SIGN) 20 ' E M E R G E N C Y AC C E S S E A S E M E N T & A C C E S S E A S E M E N T BO O K 1 9 4 6 , P A G E 7 5 7 8.5' 8.9' 8.7' 9.0' 3.4' AREA UNDER CONSTRUCTION 15 ' U T I L I T Y E A S E M E N T (R E C E P T I O N N O . 2 0 2 3 0 0 3 5 9 9 5 ) 24' PUBLIC R.O.W. (RECEPTION NO. 20230035995) 30' PUBLIC ACCESS EASEMENT (RECEPTION NO. 20230035995) 24' RECIPROCAL EASEMENT AGREEMENT TO DILLON COMPANIES LLC (RECEPTION NO. 20230020881) 23' PEDESTRIAN ACCESS EASEMENT (RECEPTION NO. 98073456) 17.5' EMERGENCY ACCESS EASEMENT & ACCESS EASEMENT (RECEPTION NO. 20240039325) 22' UTILITY EASEMENT (RECEPTION NO. 20240039325) 6' UTILITY EASEMENT (BOOK 1462, PAGE 890) 15' PSC UTILITY EASEMENT (BOOK 1946, PAGE 757) 30' DRAINAGE EASEMENT (RECEPTION NO. 20110028622) 15' UTILITY EASEMENT (BOOK 1462, PAGE 890) 5' UTILITY EASEMENT (RECEPTION NO. 98073456) 30' SANITARY SEWER EASEMENT (RECEPTION NO. 98073456) 0.7'x1.8' COLUMN 0.7'x1.7' COLUMN 0.7'x1.7' COLUMN CUT-OFF PIPE W/ELECTRICAL BOX TREE STUMP GROUND LIGHT 31 ' E M E R G E N C Y AC C E S S E A S E M E N T & A C C E S S E A S E M E N T (R E C E P T I O N N O . 2 0 2 4 0 0 3 9 3 2 5 ) 9' U T I L I T Y E A S E M E N T (R E C E P T I O N N O . 2 0 2 3 0 0 3 5 9 9 5 ) RAMPRAMP RAMP RA M P RA M P RAMP BENCH 6' UTILITY EASEMENT (BOOK 1462, PAGE 890) CONCRETE SIDEWALK 6' U T I L I T Y E A S E M E N T BO O K 1 4 5 1 , P A G E 7 0 1 5.0' 20' UTILITY EASEMENT (RECEPTION NO. 770323) 32.0' 15.0' 37' UTILITY EASEMENT (RECEPTION NO. 20240039325) 49 ' 27.0' 5.0'32.0' 5.0'21.0' 26.0' 502 1 5019 50 1 9 5019 5018 5019 5018 5019 5019 5021 50 2 1 50 2 2 502 2 5022 5022 5021 502 2 50 2 2 50 2 1 5023 5020 50 2 0 50 2 0 50 2 0 50 2 0 50 2 0 5020 5025 50 2 5 5019 PROPOSED BANK OF AMERICA (REFER TO ARCH PLANS) ONE-STORY ±4,240 SF CG (GENERAL COMMERCIAL) 4 12 LANE 1BYPASS DO NOT ENTER 4 20' D R A I N A G E EASE M E N T (REC E P T I O N N O . 20240 0 3 9 3 2 5 ) CONSTRUCTION FENCE 20' PEDESTRIAN ACCESS & UTILITY EASEMENT (RECEPTION NO. 20240039325) 11' PUBLIC R.O.W. (RECEPTION NO. 20240039325) SOUTH COLLEGE SHOPS(STUCCO SIGN) 20 ' E M E R G E N C Y AC C E S S E A S E M E N T & A C C E S S E A S E M E N T BO O K 1 9 4 6 , P A G E 7 5 7 8.5' 8.9' 8.7' 9.0' 3.4' AREA UNDER CONSTRUCTION 15 ' U T I L I T Y E A S E M E N T (R E C E P T I O N N O . 2 0 2 3 0 0 3 5 9 9 5 ) 24' PUBLIC R.O.W. (RECEPTION NO. 20230035995) 30' PUBLIC ACCESS EASEMENT (RECEPTION NO. 20230035995) 24' RECIPROCAL EASEMENT AGREEMENT TO DILLON COMPANIES LLC (RECEPTION NO. 20230020881) 23' PEDESTRIAN ACCESS EASEMENT (RECEPTION NO. 98073456) 17.5' EMERGENCY ACCESS EASEMENT & ACCESS EASEMENT (RECEPTION NO. 20240039325) 22' UTILITY EASEMENT (RECEPTION NO. 20240039325) 6' UTILITY EASEMENT (BOOK 1462, PAGE 890) 15' PSC UTILITY EASEMENT (BOOK 1946, PAGE 757) 30' DRAINAGE EASEMENT (RECEPTION NO. 20110028622) 15' UTILITY EASEMENT (BOOK 1462, PAGE 890) 5' UTILITY EASEMENT (RECEPTION NO. 98073456) 30' SANITARY SEWER EASEMENT (RECEPTION NO. 98073456) 0.7'x1.8' COLUMN 0.7'x1.7' COLUMN 0.7'x1.7' COLUMN CUT-OFF PIPE W/ELECTRICAL BOX TREE STUMP GROUND LIGHT 31 ' E M E R G E N C Y AC C E S S E A S E M E N T & A C C E S S E A S E M E N T (R E C E P T I O N N O . 2 0 2 4 0 0 3 9 3 2 5 ) 9' U T I L I T Y E A S E M E N T (R E C E P T I O N N O . 2 0 2 3 0 0 3 5 9 9 5 ) RAMPRAMP RAMP RA M P RA M P RAMP BENCH 6' UTILITY EASEMENT (BOOK 1462, PAGE 890) CONCRETE SIDEWALK 6' U T I L I T Y E A S E M E N T BO O K 1 4 5 1 , P A G E 7 0 1 5.0' 20' UTILITY EASEMENT (RECEPTION NO. 770323) 32.0' 15.0' 37' UTILITY EASEMENT (RECEPTION NO. 20240039325) 49 ' 27.0' 5.0'32.0' 5.0'21.0' 26.0' 502 1 5019 50 1 9 5019 5018 5019 5018 5019 5019 5021 50 2 1 50 2 2 502 2 5022 5022 5021 502 2 50 2 2 50 2 1 5023 5020 50 2 0 50 2 0 50 2 0 50 2 0 50 2 0 5020 5025 50 2 5 5019 Date Description No. Revisions © 2 0 2 5 L a n g a n www.langan.com 300 Union Boulevard, Suite 405 Lakewood, CO 80228 T: 303.262.2000 Langan Engineering and Environmental Services, LLC GRAPHIC SCALE FEET04020 1" = 20' THESE PLANS ARE SUBJECT TO REVIEW & APPROVAL BY JURISDICTIONAL ENTITIES. Know what's below. before you dig.Call R LEGEND IMPERVIOUS SURFACE IMPERVIOUS COVERAGE Total Area 49,360 SF Existing Condition 40,758 SF (82.57%) Proposed Condition 40,739 SF (82.53%) *Proposed condition removes 19 SF of impervious area EXISTING PROPOSED 20' D R A I N A G E EASE M E N T (REC E P T I O N N O . 20240 0 3 9 3 2 5 ) HANDICAP PARKING SIGNS CONSTRUCTION FENCE 20' PEDESTRIAN ACCESS & UTILITY EASEMENT (RECEPTION NO. 20240039325) 11' PUBLIC R.O.W. (RECEPTION NO. 20240039325) SOUTH COLLEGE SHOPS(STUCCO SIGN) DUMPSTER 20 ' E M E R G E N C Y AC C E S S E A S E M E N T & A C C E S S E A S E M E N T BO O K 1 9 4 6 , P A G E 7 5 7 26' UTILITY EASEMENT (RECEPTION NO. 20240039325) 8" WIDE BLOCK 8" WIDE BLOCK 8.5' 8.9' 8.7' 9.0' 3.4' BRICK WALL AREA UNDER CONSTRUCTION 1" WIDE STUCCO WALL 15 ' U T I L I T Y E A S E M E N T (R E C E P T I O N N O . 2 0 2 3 0 0 3 5 9 9 5 ) 24' PUBLIC R.O.W. (RECEPTION NO. 20230035995) 30' PUBLIC ACCESS EASEMENT (RECEPTION NO. 20230035995) 20' UTILITY EASEMENT (RECEPTION NO. 20230035995) INCA CUSTOMER PARKING ONLY SIGNS 37' UTILITY EASEMENT (RECEPTION NO. 20240039325) 24' RECIPROCAL EASEMENT AGREEMENT TO DILLON COMPANIES LLC (RECEPTION NO. 20230020881) 20' UTILITY EASEMENT (RECEPTION NO. 20230020879) 17.5' EMERGENCY ACCESS EASEMENT & ACCESS EASEMENT (RECEPTION NO. 20240039325) 22' UTILITY EASEMENT (RECEPTION NO. 20240039325) 6' UTILITY EASEMENT (BOOK 1462, PAGE 890) 15' PSC UTILITY EASEMENT (BOOK 1946, PAGE 757) 30' DRAINAGE EASEMENT (RECEPTION NO. 20110028622) 15' UTILITY EASEMENT (BOOK 1462, PAGE 890) 5' UTILITY EASEMENT (RECEPTION NO. 98073456) (RECEPTION NO. 98073456) 0.7'x1.8' COLUMN 0.7'x1.7' COLUMN 0.7'x1.7' COLUMN 1.7'x1.7' COLUMN 1.7'x1.7' COLUMN 1.7'x1.7' COLUMN 1.7'x1.7' COLUMN 1.7'x1.7' COLUMN 1.7'x1.7' COLUMN CUT-OFF PIPE W/ELECTRICAL BOX TREE STUMP GROUND LIGHT 31 ' E M E R G E N C Y AC C E S S E A S E M E N T & A C C E S S E A S E M E N T (R E C E P T I O N N O . 2 0 2 4 0 0 3 9 3 2 5 ) 15 ' B I C Y C L E P E D E S T R I A N AC C E S S E A S E M E N T (R E C E P T I O N N O . 9 8 0 7 3 4 5 6 ) 9' U T I L I T Y E A S E M E N T (R E C E P T I O N N O . 2 0 2 3 0 0 3 5 9 9 5 ) RAMPRAMP RAMP RA M P RA M P HANDICAP RAMP RAMP BENCH BIKE RACK 6' UTILITY EASEMENT (BOOK 1462, PAGE 890) CONCRETE SIDEWALK GRAVEL GRAVEL BUILDING FOOTPRINT AT GROUND LEVEL BUILDING EAVE/OVERHANG 6' U T I L I T Y E A S E M E N T BO O K 1 4 5 1 , P A G E 7 0 1 6' U T I L I T Y E A S E M E N T (B O O K 1 4 6 2 , P A G E 8 9 0 ) 5.0' 20' UTILITY EASEMENT (RECEPTION NO. 770323) 32.0' 15.0' 37' UTILITY EASEMENT (RECEPTION NO. 20240039325) 49 ' 27.0' 5.0'32.0' 5.0'21.0' 26.0' 502 1 5019 50 1 9 5019 5018 5019 5018 5019 5019 5021 50 2 1 50 2 2 502 2 5022 5022 5021 502 2 50 2 2 50 2 1 5023 5020 50 2 0 50 2 0 50 2 0 50 2 0 50 2 0 5020 5025 50 2 5 5019 5022 5021 5020 5019 5019 5018 5022 5022 502 3 50 2 2 50 2 1 50 2 0 50 1 9 50 1 9 50 1 8 50 1 8 5022 502 2 X-02 1.03 9.3 X-03 0.10 0.7 X-05 0.39 3.3 X-04 0.30 2.7 X-01 0.02 0.1 Date Description No. Revisions © 2 0 2 5 L a n g a n www.langan.com 300 Union Boulevard, Suite 405 Lakewood, CO 80228 T: 303.262.2000 Langan Engineering and Environmental Services, LLC GRAPHIC SCALE FEET04020 1" = 20' THESE PLANS ARE SUBJECT TO REVIEW & APPROVAL BY JURISDICTIONAL ENTITIES. Know what's below. before you dig.Call R LEGEND ACRES BASIN NAME 100 YR FLOW (CFS) DRAINAGE BASIN DRAINAGE AREA EXISTING FLOW ARROW X-00 1.00 5.00 PRE-DEVELOPMENT DRAINAGE AREA CALCULATIONS Drainage Area Designation Drainage Area Runoff Coefficient Time of Concentration 2-Year Rainfall Intensity (I2) 2-Year Peak Discharge (Q2) 10-Year Rainfall Intensity (I10) 10-Year Peak Discharge (Q10) 100-Year Rainfall Intensity (I100) 100-Year Peak Discharge (Q100) -(ac)"C"(min)(in/hr)(cfs)(in/hr)(cfs)(in/hr)(cfs) X-01 0.02 0.37 5 2.85 0.0 4.87 0.0 9.95 0.1 X-02 1.03 0.91 5 2.85 2.7 4.87 4.6 9.95 9.3 X-03 0.10 0.67 5 2.85 0.2 4.87 0.3 9.95 0.7 X-04 0.30 0.92 5 2.85 0.8 4.87 1.3 9.95 2.7 X-05 0.39 0.85 5 2.85 1.0 4.87 1.6 9.95 3.3 Total 1.84 4.6 7.9 16.1 Note: Calculations based on the Rational Method: Q = C*I*A; Intensities taken from Fort Collins Stormwater Criteria Manual 5019 5019 5019 5021 5021 5021 50 2 0 5021 502 1 5018 5020 5019 50 2 1 5020 5020 ST PROPOSED BANK OF AMERICA (REFER TO ARCH PLANS) ONE-STORY ±4,240 SF CG (GENERAL COMMERCIAL) FFE = 5022 VAN LANE 1BYPASS DO NOT ENTER NO PARKING CONSTRUCTION FENCE SOUTH COLLEGE SHOPS(STUCCO SIGN) 8" WIDE BLOCK 8" WIDE BLOCK 8.5' 8.9' 8.7' 9.0' 3.4' AREA UNDER CONSTRUCTION 0.7'x1.8' COLUMN 0.7'x1.7' COLUMN 0.7'x1.7' COLUMN CUT-OFF PIPE W/ELECTRICAL BOX TREE STUMP GROUND LIGHT RAMPRAMP RAMP RA M P RA M P RAMP BENCH CONCRETE SIDEWALK 5.0' 32.0' 15.0' 49 ' 27.0' 5.0'32.0' 5.0'21.0' 26.0' 502 1 5019 50 1 9 5019 5018 5019 5018 5019 5019 5021 50 2 1 50 2 2 502 2 5022 5022 5021 502 2 50 2 2 50 2 1 5023 5020 50 2 0 50 2 0 50 2 0 50 2 0 50 2 0 5020 5025 50 2 5 5019 5022 5021 5020 5019 5019 5018 5022 5022 502 3 50 2 2 50 2 1 50 2 0 50 1 9 50 1 9 50 1 8 50 1 8 5022 502 2 DA-2 1.02 9.0 DA-3 0.08 0.4 DA-5 0.29 2.7 DA-4 0.43 4.0 DA-1 0.02 0.1 Date Description No. Revisions © 2 0 2 5 L a n g a n www.langan.com 300 Union Boulevard, Suite 405 Lakewood, CO 80228 T: 303.262.2000 Langan Engineering and Environmental Services, LLC GRAPHIC SCALE FEET04020 1" = 20' THESE PLANS ARE SUBJECT TO REVIEW & APPROVAL BY JURISDICTIONAL ENTITIES. Know what's below. before you dig.Call R LEGEND ACRES BASIN NAME 100 YR FLOW (CFS) DRAINAGE BASIN DRAINAGE AREA PROPOSED FLOW ARROW DA-00 1.00 5.00 POST-DEVELOPMENT DRAINAGE AREA CALCULATIONS Drainage Area Designation Drainage Area Runoff Coefficient Time of Concentration 2-Year Rainfall Intensity (I2) 2-Year Peak Discharge (Q2) 10-Year Rainfall Intensity (I10) 10-Year Peak Discharge (Q10) 100-Year Rainfall Intensity (I100) 100-Year Peak Discharge (Q100) -(ac)"C"(min)(in/hr)(cfs)(in/hr)(cfs)(in/hr)(cfs) DA-1 0.02 0.27 5 2.85 0.0 4.87 0.0 9.95 0.1 DA-2 1.02 0.88 5 2.85 2.6 4.87 4.4 9.95 9.0 DA-3 0.08 0.51 5 2.85 0.1 4.87 0.2 9.95 0.4 DA-4 0.43 0.94 5 2.85 1.1 4.87 1.9 9.95 4.0 DA-5 0.29 0.93 5 2.85 0.8 4.87 1.3 9.95 2.7 Total 1.84 4.61 7.87 16.1 Note: Calculations based on the Rational Method: Q = C*I*A; Intensities taken from Fort Collins Stormwater Criteria Manual 5019 5019 5019 5021 5021 5021 50 2 0 5021 502 1 5018 5020 5019 50 2 1 5020 5020 PROPOSED BANK OF AMERICA (REFER TO ARCH PLANS) ONE-STORY ±4,240 SF CG (GENERAL COMMERCIAL) FFE = 5022 VANNO PARKING 20' D R A I N A G E EASE M E N T (REC E P T I O N N O . 20240 0 3 9 3 2 5 ) CONSTRUCTION FENCE 20' PEDESTRIAN ACCESS & UTILITY EASEMENT (RECEPTION NO. 20240039325) 11' PUBLIC R.O.W. (RECEPTION NO. 20240039325) SOUTH COLLEGE SHOPS(STUCCO SIGN) 20 ' E M E R G E N C Y AC C E S S E A S E M E N T & A C C E S S E A S E M E N T BO O K 1 9 4 6 , P A G E 7 5 7 26' UTILITY EASEMENT (RECEPTION NO. 20240039325) 8" WIDE BLOCK 8" WIDE BLOCK 8.5' 8.9' 8.7' 9.0' 3.4' AREA UNDER CONSTRUCTION 15 ' U T I L I T Y E A S E M E N T (R E C E P T I O N N O . 2 0 2 3 0 0 3 5 9 9 5 ) 24' PUBLIC R.O.W. (RECEPTION NO. 20230035995) 30' PUBLIC ACCESS EASEMENT (RECEPTION NO. 20230035995) 20' UTILITY EASEMENT (RECEPTION NO. 20230035995) 37' UTILITY EASEMENT (RECEPTION NO. 20240039325) 24' RECIPROCAL EASEMENT AGREEMENT TO DILLON COMPANIES LLC (RECEPTION NO. 20230020881) 20' UTILITY EASEMENT (RECEPTION NO. 20230020879) 23' PEDESTRIAN ACCESS EASEMENT (RECEPTION NO. 98073456) 17.5' EMERGENCY ACCESS EASEMENT & ACCESS EASEMENT (RECEPTION NO. 20240039325) 22' UTILITY EASEMENT (RECEPTION NO. 20240039325) 6' UTILITY EASEMENT (BOOK 1462, PAGE 890) 15' PSC UTILITY EASEMENT (BOOK 1946, PAGE 757) 30' DRAINAGE EASEMENT (RECEPTION NO. 20110028622) 15' UTILITY EASEMENT (BOOK 1462, PAGE 890) 5' UTILITY EASEMENT (RECEPTION NO. 98073456) 30' SANITARY SEWER EASEMENT (RECEPTION NO. 98073456) 0.7'x1.8' COLUMN 0.7'x1.7' COLUMN 0.7'x1.7' COLUMN CUT-OFF PIPE W/ELECTRICAL BOX TREE STUMP GROUND LIGHT 31 ' E M E R G E N C Y AC C E S S E A S E M E N T & A C C E S S E A S E M E N T (R E C E P T I O N N O . 2 0 2 4 0 0 3 9 3 2 5 ) 15 ' B I C Y C L E P E D E S T R I A N AC C E S S E A S E M E N T (R E C E P T I O N N O . 9 8 0 7 3 4 5 6 ) 9' U T I L I T Y E A S E M E N T (R E C E P T I O N N O . 2 0 2 3 0 0 3 5 9 9 5 ) RAMPRAMP RAMP RA M P RA M P RAMP BENCH 6' UTILITY EASEMENT (BOOK 1462, PAGE 890) CONCRETE SIDEWALK 6' U T I L I T Y E A S E M E N T BO O K 1 4 5 1 , P A G E 7 0 1 6' U T I L I T Y E A S E M E N T (B O O K 1 4 6 2 , P A G E 8 9 0 ) 5.0' 20' UTILITY EASEMENT (RECEPTION NO. 770323) 32.0' 15.0' 37' UTILITY EASEMENT (RECEPTION NO. 20240039325) 49 ' 27.0' 5.0'32.0' 5.0'21.0' 26.0' 502 1 5019 50 1 9 5019 5018 5019 5018 5019 5019 5021 50 2 1 50 2 2 502 2 5022 5022 5021 502 2 50 2 2 50 2 1 5023 5020 50 2 0 50 2 0 50 2 0 50 2 0 50 2 0 5020 5025 50 2 5 5019 ST 0+0 0 0+7 5 0+ 0 0 0+ 3 6 0+ 0 0 1+ 0 0 2+00 2+22 0+0 0 0+3 8 0+0 0 1+00 2+ 0 0 3+ 0 0 3+ 8 9 12" C M P @ 1 . 0 0 % LAT - 1 . 0 24" CMP @ 1.31% STRM-1 24 " C M P @ 1 . 3 1 % ST R M - 1 24" C M P @ 1 . 3 1 % STR M - 1 24" CMP @ 1.31% STRM-1 12 " C M P @ 1 . 0 0 % LA T - 1 . 1 12" C M P @ 1 . 0 0 % LAT- 1 . 2 12 " C M P @ 1 . 0 0 % LA T - 1 . 2 12" C M P @ 1 . 0 0 % LAT - 1 . 2 . 1 SEE DETAIL OF THIS INLET AND EXISTING PUBLIC STORM INFRASTRUCTURE TO THE LEFT, THIS SHEET EXISTING PUBLIC 30" RCP @ ±0.45% EXISTING PUBLIC 15" RCP @ ±0.45% STA. 0+00.00 ~ STRM-1 INSTALL 45° WYE FL 24" = 5011.11 STA. 2+22.03 ~ LAT-1.2 INSTALL 5' CURB INLET FL 12" = 5016.20 STA. 3+89.11 ~ STRM-1 REMOVE EXISTING GRATED LID AND REPLACE WITH ENCLOSED LID FL 24" = 5016.19 STA. 0+38.44 ~ LAT-1.2.1 INSTALL 5' CURB INLET FL 12" = 5015.69 STA. 1+32.61 ~ LAT-1.2 INSTALL STORM MANHOLE FL 12" = 5015.31 FL 12" = 5015.31 FL 12" = 5015.31 STA. 0+36.28 ~ LAT-1.1 PRESERVE EXISTING GRATE INLET. MATCH EXISTING INVERT & RIM ELEVATIONS FL 12" = 5015.24 STA. 0+00.00 ~ LAT-1.1 CONNECT TO UNDERGROUND FILTRATION BASIN FL 12" = 5014.88 STA. 1+66.48 ~ STRM-1 INSTALL 45° BEND FL 24" = 5013.28 STA. 1+23.92 ~ STRM-1 INSTALL 45° BEND FL 24" = 5012.73 STA. 0+74.71 ~ LAT-1.0 CONNECT TO UNDERGROUND FILTRATION BASIN FL 12" = 5012.41 STA. 0+41.83 ~ STRM-1 INSTALL 45° WYE FL 24" = 5011.66 STA. 0+08.91 ~ STRM-1 INSTALL 45° BEND FL 24" = 5011.23 STA. 0+00.00 ~ LAT-1.2 CONNECT TO UNDERGROUND FILTRATION BASIN FL 12" = 5013.98 EXISTING 24" CMP @ ±0.40% Date Description No. Revisions © 2 0 2 5 L a n g a n www.langan.com 300 Union Boulevard, Suite 405 Lakewood, CO 80228 T: 303.262.2000 Langan Engineering and Environmental Services, LLC GRAPHIC SCALE FEET04020 1" = 20' ** NOTICE TO CONTRACTORS - TOPOGRAPHIC SURVEY ** TOPOGRAPHIC INFORMATION TAKEN FROM A TOPOGRAPHIC SURVEY PERFORMED BY LANGAN ENGINEERING AND ENVIRONMENTAL SERVICES, LLC.. THE CONTRACTOR SHALL NOTIFY THE ENGINEER IMMEDIATELY, IN WRITING, OF ANY DISCREPANCIES OR OMISSIONS TO THE TOPOGRAPHIC INFORMATION. THE CONTRACTOR(S) SHALL BE RESPONSIBLE FOR CONFIRMING THE LOCATION (HORIZONTAL/VERTICAL) OF ANY BURIED CABLES, CONDUITS, PIPES, AND STRUCTURES (STORM SEWER, SANITARY SEWER, WATER, GAS, TELEVISION, TELEPHONE, ETC.) WHICH IMPACT THE CONSTRUCTION SITE. THE CONTRACTOR(S) SHALL NOTIFY THE OWNER AND ENGINEER IF ANY DISCREPANCIES ARE FOUND BETWEEN THE ACTUAL CONDITIONS VERSUS THE DATA CONTAINED IN THE CONSTRUCTION PLANS. ANY COSTS INCURRED AS THE RESULT OF NOT CONFIRMING THE ACTUAL LOCATION (HORIZONTAL/VERTICAL) OF SAID CABLES, CONDUITS, PIPES, AND STRUCTURES SHALL BE BORNE BY THE CONTRACTOR. ADDITIONALLY, THE CONTRACTOR(S) SHALL NOTIFY THE OWNER AND ENGINEER IF ANY ERRORS OR DISCREPANCIES ARE FOUND ON THE CONSTRUCTION DOCUMENTS (PS&E), WHICH NEGATIVELY IMPACT THE PROJECT. THE ENGINEER AND OWNER SHALL BE INDEMNIFIED OF PROBLEMS AND/OR COST WHICH MAY RESULT FROM CONTRACTOR'S FAILURE TO NOTIFY ENGINEER AND OWNER. THESE PLANS ARE SUBJECT TO REVIEW & APPROVAL BY JURISDICTIONAL ENTITIES. THE CONTRACTOR IS SPECIFICALLY CAUTIONED THAT THE LOCATION AND/OR ELEVATION OF ANY EXISTING UTILITIES AS SHOWN ON THESE PLANS ARE BASED ON RECORDS OF THE VARIOUS UTILITY COMPANIES, THE GOVERNING MUNICIPALITY, AND WHERE POSSIBLE, MEASUREMENTS TAKEN IN THE FIELD. THE INFORMATION PROVIDED IS NOT TO BE RELIED ON AS BEING EXACT OR COMPLETE. THE CONTRACTOR MUST CALL THE APPROPRIATE UTILITY COMPANY AT LEAST 48 HOURS BEFORE ANY EXCAVATION TO REQUEST EXACT FIELD LOCATION OF UTILITIES. IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR TO RELOCATE ALL EXISTING UTILITIES WHICH CONFLICT WITH THE PROPOSED IMPROVEMENTS SHOWN ON THESE PLANS. **NOTICE TO CONTRACTORS - UTILITIES** !!!CAUTION!!! EXISTING OVERHEAD & UNDERGROUND UTILITIES IN THE VICINITY. VERIFY LOCATION OF EXISTING UNDERGROUND UTILITIES BY VACUUM EXCAVATION OR OTHER POTHOLING TECHNIQUES.Know what's below. before you dig.Call R LEGEND PROPOSED STORM LINE PROPOSED STORM CENTERLINE PROPOSED CURB INLET FL FLOWLINE TI TOP OF INLET REMOVE EXISTING 24" CMP IMAGE ABOVE SOURCED FROM THE "EXTENSION OF K-MART PLAZA" PLANS SEALED BY PHILLIP I. ROBINSON 04/15/1974 5019 5019 5019 5021 5021 5021 5020 50 2 0 5021 502 1 5018 5020 5019 50 2 1 PROPOSED BANK OF AMERICA (REFER TO ARCH PLANS) ONE-STORY ±4,240 SF CG (GENERAL COMMERCIAL) 20' D R A I N A G E EASE M E N T (REC E P T I O N N O . 20240 0 3 9 3 2 5 ) CONSTRUCTION FENCE 20' PEDESTRIAN ACCESS & UTILITY EASEMENT (RECEPTION NO. 20240039325) 11' PUBLIC R.O.W. (RECEPTION NO. 20240039325) SOUTH COLLEGE SHOPS(STUCCO SIGN) 20 ' E M E R G E N C Y AC C E S S E A S E M E N T & A C C E S S E A S E M E N T BO O K 1 9 4 6 , P A G E 7 5 7 26' UTILITY EASEMENT (RECEPTION NO. 20240039325) 8" WIDE BLOCK 8" WIDE BLOCK 8.5' 8.9' 8.7' 9.0' 3.4' AREA UNDER CONSTRUCTION 15 ' U T I L I T Y E A S E M E N T (R E C E P T I O N N O . 2 0 2 3 0 0 3 5 9 9 5 ) 24' PUBLIC R.O.W. (RECEPTION NO. 20230035995) 30' PUBLIC ACCESS EASEMENT (RECEPTION NO. 20230035995) 20' UTILITY EASEMENT (RECEPTION NO. 20230035995) 37' UTILITY EASEMENT (RECEPTION NO. 20240039325) 24' RECIPROCAL EASEMENT AGREEMENT TO DILLON COMPANIES LLC (RECEPTION NO. 20230020881) 20' UTILITY EASEMENT (RECEPTION NO. 20230020879) 23' PEDESTRIAN ACCESS EASEMENT (RECEPTION NO. 98073456) 17.5' EMERGENCY ACCESS EASEMENT & ACCESS EASEMENT (RECEPTION NO. 20240039325) 22' UTILITY EASEMENT (RECEPTION NO. 20240039325) 6' UTILITY EASEMENT (BOOK 1462, PAGE 890) 15' PSC UTILITY EASEMENT (BOOK 1946, PAGE 757) 30' DRAINAGE EASEMENT (RECEPTION NO. 20110028622) 15' UTILITY EASEMENT (BOOK 1462, PAGE 890) 5' UTILITY EASEMENT (RECEPTION NO. 98073456) 30' SANITARY SEWER EASEMENT (RECEPTION NO. 98073456) 0.7'x1.8' COLUMN 0.7'x1.7' COLUMN 0.7'x1.7' COLUMN CUT-OFF PIPE W/ELECTRICAL BOX TREE STUMP GROUND LIGHT 31 ' E M E R G E N C Y AC C E S S E A S E M E N T & A C C E S S E A S E M E N T (R E C E P T I O N N O . 2 0 2 4 0 0 3 9 3 2 5 ) 15 ' B I C Y C L E P E D E S T R I A N AC C E S S E A S E M E N T (R E C E P T I O N N O . 9 8 0 7 3 4 5 6 ) 9' U T I L I T Y E A S E M E N T (R E C E P T I O N N O . 2 0 2 3 0 0 3 5 9 9 5 ) RAMPRAMP RAMP RA M P RA M P RAMP BENCH 6' UTILITY EASEMENT (BOOK 1462, PAGE 890) CONCRETE SIDEWALK 6' U T I L I T Y E A S E M E N T BO O K 1 4 5 1 , P A G E 7 0 1 6' U T I L I T Y E A S E M E N T (B O O K 1 4 6 2 , P A G E 8 9 0 ) 5.0' 20' UTILITY EASEMENT (RECEPTION NO. 770323) 32.0' 15.0' 37' UTILITY EASEMENT (RECEPTION NO. 20240039325) 49 ' 27.0' 5.0'32.0' 5.0'21.0' 26.0' 502 1 5019 50 1 9 5019 5018 5019 5018 5019 5019 5021 50 2 1 50 2 2 502 2 5022 5022 5021 502 2 50 2 2 50 2 1 5023 5020 50 2 0 50 2 0 50 2 0 50 2 0 50 2 0 5020 5025 50 2 5 5019 ST EXISTING PUBLIC 30" RCP @ ±0.45% PROPOSED PROPRIETARY UNDERGROUND FILTRATION BASIN EXISTING CMP @ ±0.40% PROPOSED CURB INLET TO FILTRATION BASIN PROPOSED GRATE INLET TO FILTRATION BASIN PROPOSED GRATE INLET TO FILTRATION BASIN PROPOSED 45° WYE CONNECTION TO EXISTING PUBLIC 30" RCP EXISTING STORM GRATE TO BE CONVERTED TO MANHOLE AND OFFSITE TRIBUTARY AREA TO BYPASS THE PROPOSED WATER QUALITY SYSTEM Date Description No. Revisions © 2 0 2 5 L a n g a n www.langan.com 300 Union Boulevard, Suite 405 Lakewood, CO 80228 T: 303.262.2000 Langan Engineering and Environmental Services, LLC GRAPHIC SCALE FEET04020 1" = 20' LEGEND PROPOSED STORM LINE PROPOSED STORM CENTERLINE PROPOSED CURB INLET WQ/LID SUMMARY TRIBUTARY CATCHMENT AREA UPSTREAM 1.84 AC WQCV REQUIRED 2,222 CU FT WQCV PROVIDED .0 2,500 5,0001,250 Feet SPRING CREEK BASIN MANAGEMENT PROPOSED CONDITION BMP MAP Ov e r l a n d T r a i l Co l l e g e A v e Co l l e g e A v e Harmony Rd Horsetooth Rd Prospect Rd Prospect Rd Sh e i l d s S t Taft Hill Rd Taft Hill Rd Sheilds St Drake Rd Lem ay Ave Timberline Rd Colorado State University Lemay Ave Parkwood Lake !( !( !(!(!( !( !( Union Pacific RR Burlington Northern RR Burlington Northern RR Warren Lake Horsetooth Reservoir College Lake Lake Sherwood Spring Canyon Park Pond (Optional) • Retrofit Existing Pond To Accomodate Water Quality Volume Kensington Pond • Retrofit Existing Pond To Accomodate Water Quality Volume Proposed CSU Ropes Pond • Construct Pond To Accomodate Water Quality Volume Proposed Edora Pond • Construct Pond To Accomodate Water Quality Volume CSU Vet Hospital Pond • Retrofit Existing Pond To Accomodate Water Quality Volume Woodwest Detention Pond • Construct Proprietary Mechanical BMP At Pond Outlet. Wagon Wheel Pond (Optional) • Retrofit Existing Pond To Accomodate Water Quality Volume Rossborough Park Pond • Install Water Quality Outlet To Accomodate Water Quality Volume Proposed Taft and Horsetooth Pond • Construct Pond To Accomodate Water Quality Volume Proposed Centre Ave Pond • Construct Pond To Accomodate Water Quality Volume !( !( #### !( ## ## ## ## ## ## ## Proposed Stream Restoration and Habitat Improvements Legend ##Proposed Water Quality Pond Proposed BMP Basin Type Flood Control Only Water Quality Only WQ Not Evaluated Water Drains Into Irrigation System Undeveloped Area Flood Control and Water Quality Proprietary Mechanical BMP!( Proposed Improvement Spring Creek Basin Proposed Stream Restoration and Habitat Improvements SITE LOCATION SITE LOCATION