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SIT AND STAY DOG BAR - PDP210016 - SUBMITTAL DOCUMENTS - ROUND 2 - DRAINAGE REPORT
1880 Fall River Drive / Suite 200 / Loveland, CO 80538 O 970.461.7733 / olsson.com August 17, 2022 City of Fort Collins Stormwater Engineering 281 North College Avenue Fort Collins, CO 80522 RE: 1524 N College Ave Dog Day-Care & Bar, PDR210009, Round Number Wes Lamarque: This memo is being submitted as a summary of the stormwater drainage design for the Dog Daycare & Bar located at 1524 N College Ave. The purpose of this memo is to verify the design of the project meets the analysis and intent of the Dry Creek Master Drainage Plan and the “Final Drainage Report for COUNTRY CLUB CORNERS 6th FILING” (Master Report) dated February 4, 2000 by Futura Engineering. A portion of the Master Report are included with this memo. Site Description The project site is located at 1524 North College Avenue, Lot 3 of Country Club Corners Six Filing. The project site is approximately 95,369 square feet or 2.19 acres and the lot is currently vacant. The property is bordered by a multi-tenant commercial building to the north, Firehouse car wash and vacant parcel to the west, and the Health District Family Clinic to the south. The primary access to the proposed development will be from the existing private drive which intersects with College Avenue between Burger King and First National Bank. Secondary points of access will extend from Bristlecone Drive to the south and Willox Ln to the north. Existing ground cover on site consists mostly of short pastured/lawn and native grasses. The proposed improvements for this site include a building with parking and landscaping, potable water and wastewater service connections, and grading and drainage improvements. Generally, the site slopes from northeast to southwest with average slopes of 2% to 4%. Soils within the property classify as Hydrologic Soil Group C according to the Custom Soil Resource Report included with this memo. The property is in Flood Zone X according to FEMA. Drainage Design The conceptual drainage design for the site has been completed in accordance with the City of Fort Collins Stormwater Criteria Manual. Runoff from the building roof will be collected and conveyed in roof drains and discharged into underground detention basins located in the yard to the northeast of the building and the landscape area to the south of the building. The runoff from the parking and landscape areas will be captured within curb and landscape inlets and 1880 Fall River Drive / Suite 200 / Loveland, CO 80538 O 970.461.7733 / olsson.com conveyed to two underground detention areas to the north and south via storm sewer pipes before being discharged at a rate no greater than the historic 2-year runoff rate of 0.2 cfs/acre. Detention requirements will be met with underground Stormtech MC-3500 stormwater tanks located under the southern dog park area and near the northeast corner of the building. These stormwater tanks include isolator rows which will capture the first flush volume and release stormwater through geotextile fabric complying with LID requirements. Runoff generated on-site will be routed to the detention pond via storm sewer, and runoff from the northern portion of the site will routed into inlets and routed via storm sewer. In the Dry Creek Basin the two-year historic release rate is 0.2 cfs/acre, therefore the Stormtech underground storage tanks will provide the required 19,234 cf of stormwater runoff, this volume was found using the modified FAA model. The LID bmps will treat 92% of the new impervious areas one site, approximately 56,664 sf of area will be provided to be treated by isolator rows out of 61,609 sf of total impervious area added. No rain gardens or pervious pavers will be designed for this site. Storm Sewer System Design A private storm sewer system is proposed for the site to safely convey stormwater away from the building to the detention pond. Per the Drainage Plan basin B-2 runoff will be captured via storm sewer and routed to a Stormtech stormwater underground tank system. The Stormtech system will have 84 chambers and 10 isolator rows for water quality, refer to attached calculations. The runoff generated within basin B-1 will be captured via landscape inlets and roof drains and will be routed via storm sewer to a Stormtech stormwater underground tank system with 19 chambers and 3 isolator rows. Again, refer to attached calculations. Water Quality Water quality treatment to meet the LID requirement is being provided by isolator rows in the Stormtech underground tank systems to the north and to the south. Basin 1 will capture 525 cf of water quality volume and basin 2 will capture 2100 cf of water volume which are both greater than the required WQCV per equation 7-1 found in the stormwater criteria manual assuming a 40-hour drain time. Any area not being already captured by the Stormtech isolator rows will be treated downstream by the NEECO pond. Attachments: 1. Vicinity Map 2. Custom Soil Resource Report 3. Impervious Area Calculations 4. FAA method Detention Calculations 5. Drainage Plan 1880 Fall River Drive / Suite 200 / Loveland, CO 80538 O 970.461.7733 / olsson.com If you have any questions or need additional information, please contact us. Sincerely, Cole Schuster, Ryan Banning, PE Assistant Engineer Technical Leader 1880 Fall River Drive / Suite 200 / Loveland, CO 80538 O 970.461.7733 / olsson.com REPORT CERTIFICATION I hereby certify that this report for the final drainage design of Commercial Lot 1 was prepared by me, or under my direct supervision, in accordance with the provisions of the City of Loveland Storm Drainage Criteria for the owners thereof. Ryan Banning, P.E. State of Colorado No. 44329 © 2021 Microsoft Corporation © 2021 Maxar ©CNES (2021) Distribution Airbus DS © 2021 TomTom PROJECT LOCATION VICINITY MAP SCALE: 1"=500' 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, ColoradoNatural Resources Conservation Service September 21, 2021 Preface Soil surveys contain information that affects land use planning in survey areas. They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment. Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/ portal/nrcs/main/soils/health/) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center (https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil Scientist (http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/? cid=nrcs142p2_053951). Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require 2 alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. 3 Contents Preface....................................................................................................................2 How Soil Surveys Are Made..................................................................................5 Soil Map..................................................................................................................8 Soil Map................................................................................................................9 Legend................................................................................................................10 Map Unit Legend................................................................................................11 Map Unit Descriptions.........................................................................................11 Larimer County Area, Colorado......................................................................13 73—Nunn clay loam, 0 to 1 percent slopes.................................................13 References............................................................................................................15 4 How Soil Surveys Are Made Soil surveys are made to provide information about the soils and miscellaneous areas in a specific area. They include a description of the soils and miscellaneous areas and their location on the landscape and tables that show soil properties and limitations affecting various uses. Soil scientists observed the steepness, length, and shape of the slopes; the general pattern of drainage; the kinds of crops and native plants; and the kinds of bedrock. They observed and described many soil profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The profile extends from the surface down into the unconsolidated material in which the soil formed or from the surface down to bedrock. The unconsolidated material is devoid of roots and other living organisms and has not been changed by other biological activity. Currently, soils are mapped according to the boundaries of major land resource areas (MLRAs). MLRAs are geographically associated land resource units that share common characteristics related to physiography, geology, climate, water resources, soils, biological resources, and land uses (USDA, 2006). Soil survey areas typically consist of parts of one or more MLRA. The soils and miscellaneous areas in a survey area occur in an orderly pattern that is related to the geology, landforms, relief, climate, and natural vegetation of the area. Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform. By observing the soils and miscellaneous areas in the survey area and relating their position to specific segments of the landform, a soil scientist develops a concept, or model, of how they were formed. Thus, during mapping, this model enables the soil scientist to predict with a considerable degree of accuracy the kind of soil or miscellaneous area at a specific location on the landscape. Commonly, individual soils on the landscape merge into one another as their characteristics gradually change. To construct an accurate soil map, however, soil scientists must determine the boundaries between the soils. They can observe only a limited number of soil profiles. Nevertheless, these observations, supplemented by an understanding of the soil-vegetation-landscape relationship, are sufficient to verify predictions of the kinds of soil in an area and to determine the boundaries. Soil scientists recorded the characteristics of the soil profiles that they studied. They noted soil color, texture, size and shape of soil aggregates, kind and amount of rock fragments, distribution of plant roots, reaction, and other features that enable them to identify soils. After describing the soils in the survey area and determining their properties, the soil scientists assigned the soils to taxonomic classes (units). Taxonomic classes are concepts. Each taxonomic class has a set of soil characteristics with precisely defined limits. The classes are used as a basis for comparison to classify soils systematically. Soil taxonomy, the system of taxonomic classification used in the United States, is based mainly on the kind and character of soil properties and the arrangement of horizons within the profile. After the soil 5 scientists classified and named the soils in the survey area, they compared the individual soils with similar soils in the same taxonomic class in other areas so that they could confirm data and assemble additional data based on experience and research. The objective of soil mapping is not to delineate pure map unit components; the objective is to separate the landscape into landforms or landform segments that have similar use and management requirements. Each map unit is defined by a unique combination of soil components and/or miscellaneous areas in predictable proportions. Some components may be highly contrasting to the other components of the map unit. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The delineation of such landforms and landform segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, onsite investigation is needed to define and locate the soils and miscellaneous areas. Soil scientists make many field observations in the process of producing a soil map. The frequency of observation is dependent upon several factors, including scale of mapping, intensity of mapping, design of map units, complexity of the landscape, and experience of the soil scientist. Observations are made to test and refine the soil-landscape model and predictions and to verify the classification of the soils at specific locations. Once the soil-landscape model is refined, a significantly smaller number of measurements of individual soil properties are made and recorded. These measurements may include field measurements, such as those for color, depth to bedrock, and texture, and laboratory measurements, such as those for content of sand, silt, clay, salt, and other components. Properties of each soil typically vary from one point to another across the landscape. Observations for map unit components are aggregated to develop ranges of characteristics for the components. The aggregated values are presented. Direct measurements do not exist for every property presented for every map unit component. Values for some properties are estimated from combinations of other properties. While a soil survey is in progress, samples of some of the soils in the area generally are collected for laboratory analyses and for engineering tests. Soil scientists interpret the data from these analyses and tests as well as the field-observed characteristics and the soil properties to determine the expected behavior of the soils under different uses. Interpretations for all of the soils are field tested through observation of the soils in different uses and under different levels of management. Some interpretations are modified to fit local conditions, and some new interpretations are developed to meet local needs. Data are assembled from other sources, such as research information, production records, and field experience of specialists. For example, data on crop yields under defined levels of management are assembled from farm records and from field or plot experiments on the same kinds of soil. Predictions about soil behavior are based not only on soil properties but also on such variables as climate and biological activity. Soil conditions are predictable over long periods of time, but they are not predictable from year to year. For example, soil scientists can predict with a fairly high degree of accuracy that a given soil will have a high water table within certain depths in most years, but they cannot predict that a high water table will always be at a specific level in the soil on a specific date. After soil scientists located and identified the significant natural bodies of soil in the survey area, they drew the boundaries of these bodies on aerial photographs and Custom Soil Resource Report 6 identified each as a specific map unit. Aerial photographs show trees, buildings, fields, roads, and rivers, all of which help in locating boundaries accurately. Custom Soil Resource Report 7 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. 8 9 Custom Soil Resource Report Soil Map 4495170449519044952104495230449525044952704495290449531044951704495190449521044952304495250449527044952904495310493700 493720 493740 493760 493780 493800 493700 493720 493740 493760 493780 493800 40° 36' 31'' N 105° 4' 28'' W40° 36' 31'' N105° 4' 23'' W40° 36' 26'' N 105° 4' 28'' W40° 36' 26'' N 105° 4' 23'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84 0 35 70 140 210 Feet 0 10 20 40 60 Meters Map Scale: 1:779 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 15, Jun 9, 2020 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Aug 11, 2018—Aug 12, 2018 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 10 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 73 Nunn clay loam, 0 to 1 percent slopes 2.3 100.0% Totals for Area of Interest 2.3 100.0% 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 11 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 12 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 13 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 14 References American Association of State Highway and Transportation Officials (AASHTO). 2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition. American Society for Testing and Materials (ASTM). 2005. Standard classification of soils for engineering purposes. ASTM Standard D2487-00. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife Service FWS/OBS-79/31. Federal Register. July 13, 1994. Changes in hydric soils of the United States. Federal Register. September 18, 2002. Hydric soils of the United States. Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric soils in the United States. National Research Council. 1995. Wetlands: Characteristics and boundaries. Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U.S. Department of Agriculture Handbook 18. http://www.nrcs.usda.gov/wps/portal/ nrcs/detail/national/soils/?cid=nrcs142p2_054262 Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service, U.S. Department of Agriculture Handbook 436. http:// www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053577 Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. http:// www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053580 Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control, Wetlands Section. United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of Engineers wetlands delineation manual. Waterways Experiment Station Technical Report Y-87-1. United States Department of Agriculture, Natural Resources Conservation Service. National forestry manual. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/ home/?cid=nrcs142p2_053374 United States Department of Agriculture, Natural Resources Conservation Service. National range and pasture handbook. http://www.nrcs.usda.gov/wps/portal/nrcs/ detail/national/landuse/rangepasture/?cid=stelprdb1043084 15 United States Department of Agriculture, Natural Resources Conservation Service. National soil survey handbook, title 430-VI. http://www.nrcs.usda.gov/wps/portal/ nrcs/detail/soils/scientists/?cid=nrcs142p2_054242 United States Department of Agriculture, Natural Resources Conservation Service. 2006. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/? cid=nrcs142p2_053624 United States Department of Agriculture, Soil Conservation Service. 1961. Land capability classification. U.S. Department of Agriculture Handbook 210. http:// www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052290.pdf Custom Soil Resource Report 16 COMPOSITE PERCENT IMPERVIOUSNESS B-1 NORTH SIDE 0.09 0.03 - 0.20 0.31 0.45 0.56 37.6% B-2 HELD BY TANKS 0.78 0.46 - 0.70 1.94 0.66 0.83 62.4% 0 0 - - - - - #DIV/0! #DIV/0! TOTAL 2.25 0.63 0.79 59.0% EX-1 Existing Site Conditions 0.280 - - 2.26 2.54 0.24 0.30 28.3% 0 0 - - - - - TOTAL 2.54182964 0.24 0.30 28.3% B-1 NORTH SIDE 3741 1320 0 8497 13558 37.6% B-2 HELD BY TANKS 33877 20247 0 30285 84408 62.4% EX-1 Existing Site Conditions 12,202 0 0 98,521 110,722 28.3% COMPOSITE PERCENT IMPERVIOUSNESS B1 North Area 0.03 0.16 - 0.29 0.47 0.49 0.62 49.3% B2 South Area 0.87 0.14 0.10 0.60 1.71 0.69 0.86 69.1% TOTAL 2.18 0.65 0.74 64.8% EX-1 Ex Paving Area 0.022 - - 0.32 0.34 0.20 0.25 8.4% TOTAL 0.34 0.20 0.25 8.4% DIFF (SF) B1 North Area 1,240 6,801 0 12,546 20,587 49.3% B2 South Area 38,066 6,023 4,366 26,050 74,505 69.1% 75% of imp area B1 1,240 6,801 15,440 7399.25 75%-(ROOF+Paveing) Percent ImperviousnessC2 C100 Basin Name Basin Description Paved 100% (acres) Building 90% (acres) Gravel 40% (acres) Landscape 2% (acres) Percent ImperviousnessPaved 100% (acres) Building 90% (acres) Landscape 2% (acres) Gravel 40% (acres)C100C2 Total Area (SF) Basin Name Basin Description Total Area (ac) Total Area (ac) Basin Name Basin Description Paved 100% (SF) Building 90% (SF) Gravel / Pavers 40% (SF) Landscape 2% (SF)Percent Imperviousness Basin Name Basin Description Paved 95% (SF) Building 95% (SF)Gravel 50% (SF)Landscape 20% (SF) Total Area (SF)Percent Imperviousness Basin Name Basin Description Paved 100% (acres) Building 90% (acres) UG Detention 100% (SF) Landscape 2% (acres) Total Area (ac)C2 C100 Percent Imperviousness Basin Name Basin Description Paved 100% (acres) Building 90% (acres) Gravel 40% (acres) Landscape 2% (acres) Total Area (ac)C2 C100 Percent Imperviousness Basin Name Basin Description Paved 95% (SF) Building 95% (SF) UG Detention 100% (SF) Landscape 20% (SF) Total Area (SF)Percent Imperviousness acres cfs ft 1 3 4 1 2 1 1 1 1 2 3 ISOLATOR: FAA: STORMTECH: Enter selected chamber type fom drop down Enter selected chamber type fom drop down Intensity tables are available in hidden cells on the left. WQ intensity values are equal to 1/2 the 2-year storm values note MWB 8/17/2022 Prepared By: INSTRUCTIONS: PROJECT: Max Allowable Release Rate: 0.09 49.29% Base of Stone Elevation: 4975.51 0.4929 % IMP: C (minor): PROJECT PARAMETERS Project Name: Dog Park Bar Date: Project Number : 021-04575 Client: Basin Name: B1 WSEL's: Use ADS Stage-Storage spreadsheet for LID and 100-YR systems Paste rows from ADS into tables for WQCV and 100-YR Locate stages on either side of required volumes 0.4726Area: Enter Project name, project number, client, basin name, date, and initials Enter project area, C minor, and percent impervious from Rational Method for the compsite basins to be detained Enter maximum allowable release rate ORIFICE: Enter selected chamber type fom drop down 2 Enter base of stone elevation for system Enter orifice diameter (use inch and fraction method in cell equation) WQCV: Select WQCV drain time from drop down 100 0.09 1 1/4 in 1 1/4 inches 0.009 sf 0.610 MC-3500 60.0 in 0.09 cfs 1 0.00 0.00 2 2.50 0.21 3 5.00 0.42 4 7.50 0.63 5 10.00 0.83 6 12.50 1.04 7 15.00 1.25 8 17.50 1.46 9 20.00 1.67 10 22.50 1.88 11 25.00 2.08 12 27.50 2.29 13 30.00 2.50 14 32.50 2.71 15 35.00 2.92 16 37.50 3.13 17 40.00 3.33 18 42.50 3.54 19 45.00 3.75 20 47.50 3.96 21 50.00 4.17 22 52.50 4.38 23 55.00 4.58 24 57.50 4.79 25 60.00 5.00 If the outlet from the detention basin is under free outfall, the effective head is measured from the centroid of the orifice to the upstream water surface elevation. If the downstream jet or orifice is submerged, then the effective head is the difference in elevation between the upstream and downstream water surfaces. For square-edged, uniform orifice entrance conditions, a discharge coefficient of 0.61 should For rough-edged orifice entrance conditions, a discharge coefficient of 0.4 should be used. 0.00 0.08 0.08 0.05 0.04 0.04 0.03 0.03 0.02 0.07 0.06 0.06 0.09 0.09 0.09 0.09 0.09 0.06 0.05 0.05 Stage (in ) Stage (ft ) Outlet Release Rate (cfs ) 0.08 0.08 0.07 0.07 0.07 ResultsInput Variables Design Storm : Selected Chamber Height = Selected Chamber Type = Orifice Area = Orifice Diameter = PROPOSED ORIFICE RELEASE RATE : PROPOSED ORIFICE DIAMETER :Max. Allowable Release Rate = Orifice Coefficient = Client:0 Basin Name:B1 ORIFICE RATING CURVE: OUTLET STRUCTURE ORIFICE SIZING FOR 100-YEAR STORM Project Name:Dog Park Bar Date: 8/17/2022 Project Number :021-04575 Prepared By: MWB 0.204 in A = 0.473 acres V = 0.0097 ac-ft 420.63 cu. ft i = a = DRAIN TIME WQCV = 49.29% CITY OF FORT COLLINS (COFC) CALCULATION FOR: WATER QUALITY CAPTURE VOLUME (WQCV) 40 hr 1.00 Date: Prepared By: Basin Name: Client: Project Number : Project Name: B1 0 021-04575 Dog Park Bar MWB 8/17/2022 1 2 3 4 5 6 7 8 9 10 11 12 13 14Total Required WQ Volume [FCSCM Method] (cf)Flow WQ (cfs)Chamber TypeChamber Volume (cf)Chamber + Aggregate Volume (cf)Chamber Release Rate (cfs)Minimum No. of Chambers [FCSCM]Total Release Rate (cfs)Total Required WQ Volume [FAA Method] (cf)Minimum No. of Chambers [FAA]Minimum No. of ChambersTotal Chamber Volume (cf)Total Installed System Volume (cf)B1 420.63 0.332 MC-3500109.9175.00.03630.108 99.20 13 329.70 525SC-740MC-4500 MC-3500 SC-310 SC-160LP30.060.045.016.012.051.0100.0 77.0 34.0 25.00.350GPM/SF85.448.3 86.0 85.4 85.41 CF = 7.481GAL30.2 33.5 46.0 20.2 14.81 GALLON = 0.134CF 45.9106.5109.914.76.91 GPM = 0.002CFS74.9162.6175.031.015.00.024 0.026 0.036 0.016 0.012542CONTENTS:1FLOOR AREA (SF)INSTALLED LENGTH (IN)WIDTH (IN)HEIGHT (IN)CHAMBER DIMENSIONSFLOW RATE / CHAMBER (CFS) - ROW 3CHAMBER/AGGREGATE VOLUME (CF) - ROW 2CHAMBER VOLUME (CF) - ROW 11/2 of the 2-year developed flow rate for the basin. *FLOW RATE BASED ON 1/2 OF NOV 07 QMAX IN FIGURE 17 OF UNH TESTING REPORTFLOW RATE*CHAMBER FLOW RATE CONVERSION (GPM/SF TO CFS)STORMTECH CHAMBER DATA914131211103Greater number of required chambers through the two metods (Column 8 versus Column 11)Number of chambers required to provide required FAA storage volume stored within the chamber only (no aggregate storage); Rounded upRequired WQCV per FAA Method (based on Flow WQ and Total Release Rate) System volume includes total number of chambers, plus surrounding aggregate. This must meet or exceed the FCSCM Method required WQ VolumeVolume provided within the chambers only (no aggregate storage). This must meet or exceed the FAA Method required WQ VolumeRequired WQCV per FCSCM Equation 7-2Project Name and/or Vault IDRelease rate per chamber times the minimum number of chambers required through the FCSCM MethodNumber of chambers required to provide full WQCV within total installed system, including aggregate; Rounded UpRelease rate per chamber, limited by flow through geotextile with accumulated sediment (Selected Chamber Parameter from ROW 3)Voulme includes chamber and void spaces (40%) in surrounding aggregate (Selected Chamber Parameter from ROW 2)Volume within the chamber only, not accounting for void spaces in surrounding aggregate (Selected Chamber Parameter from ROW 1)Chamber Type Selection876COLUMN:CITY OF FORT COLLINS (COFC) SIZING CALCUALTIONS FOR LID SYSTEMS: ISOLATOR ROW CHAMBERS WITHIN ADS STORMTECH SYSTEMBasin Name:B1Project Name: Dog Park BarProject Number : 021-04575CHAMBER CONFIGURATION PARAMETERSFCSCM MethodFAA METHODRESULTSBasin Name:Client:0Prepared By: MWBDate: 8/17/2022 WQ 0.49 1.00 * C = 0.49 8.00 min 0.473 acres Max Release Rate* =0.108 cfs Time (min ) Time (sec ) Intensity (in/hr ) Inflow Flowrate (cfs ) Inflow Volume (ft 3 ) Outflow Volume (ft 3 ) Storage Volume (ft 3 ) Storage Volume (ac-ft ) 0 0 0.000 0.00 0 0 0 0 5 300 1.425 0.33 100 32 67 0.00 10 600 1.105 0.26 154 65 90 0.00 15 900 0.935 0.22 196 97 99 0.00 20 1200 0.805 0.19 225 129 96 0.00 25 1500 0.715 0.17 250 161 88 0.00 30 1800 0.650 0.15 273 194 79 0.00 35 2100 0.585 0.14 286 226 60 0.00 40 2400 0.535 0.12 299 258 41 0.00 45 2700 0.495 0.12 311 290 21 0.00 50 3000 0.460 0.11 321 323 -1 0.00 55 3300 0.435 0.10 334 355 -21 0.00 60 3600 0.410 0.10 344 387 -43 0.00 65 3900 0.385 0.09 350 420 -70 0.00 70 4200 0.365 0.09 357 452 -95 0.00 75 4500 0.345 0.08 362 484 -122 0.00 80 4800 0.330 0.08 369 516 -147 0.00 85 5100 0.315 0.07 374 549 -174 0.00 90 5400 0.305 0.07 384 581 -197 0.00 95 5700 0.290 0.07 385 613 -228 -0.01 100 6000 0.280 0.07 391 645 -254 -0.01 105 6300 0.270 0.06 396 678 -282 -0.01 110 6600 0.260 0.06 400 710 -310 -0.01 115 6900 0.255 0.06 410 742 -332 -0.01 120 7200 0.245 0.06 411 775 -364 -0.01 Input Variables Design Storm C = Results ac-ft0.00 ft399.20 WQ Volume: Detention Required *DETERMINED BY ISOLATOR ROW PARAMETERS Tc = A = Dog Park Bar CITY OF FORT COLLINS (COFC) MODIFIED FAA METHOD: REQUIRED DETENTION VOLUME Date: 8/17/2022Project Name: Project Number :021-04575 Client: Basin Name:B1 0 Prepared By: MWB 100-year 0.49 1.25 * C = 0.62 8.00 min 0.473 acres Max Release Rate* =0.09 cfs Time (min ) Time (sec ) Intensity (in/hr ) Inflow Flowrate (cfs ) Inflow Volume (ft 3 ) Outflow Volume (ft 3 ) Storage Volume (ft 3 ) Storage Volume (ac-ft ) 0 0 0.00 0.00 0 0 0 0 5 300 9.95 2.897 869 28 841 0.02 10 600 7.72 2.248 1349 56 1293 0.03 15 900 6.52 1.898 1709 84 1625 0.04 20 1200 5.60 1.631 1957 112 1845 0.04 25 1500 4.98 1.450 2175 140 2035 0.05 30 1800 4.52 1.316 2369 168 2201 0.05 35 2100 4.08 1.188 2495 196 2299 0.05 40 2400 3.74 1.089 2614 224 2390 0.05 45 2700 3.46 1.007 2720 252 2468 0.06 50 3000 3.23 0.941 2822 280 2542 0.06 55 3300 3.03 0.882 2912 308 2604 0.06 60 3600 2.86 0.833 2998 336 2662 0.06 65 3900 2.72 0.792 3089 364 2725 0.06 70 4200 2.59 0.754 3167 392 2776 0.06 75 4500 2.48 0.722 3250 420 2830 0.06 80 4800 2.38 0.693 3326 448 2879 0.07 85 5100 2.29 0.667 3401 476 2925 0.07 90 5400 2.21 0.644 3475 504 2971 0.07 95 5700 2.13 0.620 3535 532 3004 0.07 100 6000 2.06 0.600 3599 560 3039 0.07 105 6300 2.00 0.582 3669 588 3081 0.07 110 6600 1.94 0.565 3728 616 3113 0.07 115 6900 1.89 0.550 3797 644 3154 0.07 120 7200 1.84 0.536 3858 672 3186 0.07 100-year Input Variables Design Storm Tc = Results Required CITY OF FORT COLLINS (COFC) MODIFIED FAA METHOD: REQUIRED DETENTION VOLUME Project Name:Dog Park Bar Date: Client:0 Basin Name:B1 8/17/2022 Project Number :021-04575 Prepared By: MWB *DETERMINED BY ORIFICE PARAMETERS Detention Volume: 3185.92 ft3 0.07 ac-ft A = C = 1 2 3 4 5 6 7 8 9 100-Year Required Volume (cf ) Chamber Type Chamber Volume (cf ) Chamber + Aggregate Volume (cf ) Chamber Release Rate (cfs ) Minimum No. of Chambers Total Chamber Volume (cf ) Total Installed System Volume (cf ) B1 3185.9 MC-3500 109.9 175.0 0.036 19 2088.10 3325 COLUMN: 1 2 3 4 5 6 7 8 9 SC-740 MC-4500 MC-3500 SC-310 30.0 60.0 45.0 16.0 51.0 100.0 77.0 34.0 85.4 48.3 86.0 85.4 30.2 33.5 46.0 20.2 45.9 106.5 109.9 14.7 74.9 162.6 175.0 31.0 0.024 0.026 0.036 0.016 0.350 GPM/SF 1 CF = 7.481 GAL 1 GALLON = 0.134 CF 1 GPM = 0.002 CFS *FLOW RATE BASED ON 1/2 OF NOV 07 QMAX IN FIGURE 17 OF UNH TESTING REPORT FLOW RATE / CHAMBER (CFS) - ROW 3 14.8 6.9 CHAMBER FLOW RATE CONVERSION (GPM/SF TO CFS) FLOW RATE* 15.0 0.012 FLOOR AREA (SF) CHAMBER VOLUME (CF) - ROW 1 CHAMBER/AGGREGATE VOLUME (CF) - ROW 2 CITY OF FORT COLLINS (COFC) SIZING CALCUALTIONS FOR EXTENDED DETENTION SYSTEMS: ADS STORMTECH SYSTEM FOR 100-YR STORM STORAGE VOLUME Chamber Type Selection Required 100-year storm volume per COFC Modified FAA Method Project Name and/or Vault ID CONTENTS: Basin Name: COFC Modified FAA Method RESULTS Project Name:Dog Park Bar Date: 8/17/2022 021-04575 MWB 85.4 Volume within the chamber only, not accounting for void spaces in surrounding aggregate (Selected Chamber Parameter from ROW 1) Client:0 Basin Name:B1 CHAMBER CONFIGURATION PARAMETERS INSTALLED LENGTH (IN) System volume includes total number of chambers, plus surrounding aggregate. Volume provided within the chambers only (no aggregate storage). Number of chambers required to provide full 100-year storm event storage volume within total installed system, including aggregate; Rounded Up Release rate per chamber, limited by flow through geotextile with accumulated sediment (Selected Chamber Parameter from ROW 3) CHAMBER DIMENSIONS 12.0 WIDTH (IN) HEIGHT (IN) SC-160LP Project Number : 25.0 Prepared By: Voulme includes chamber and void spaces (40%) in surrounding aggregate (Selected Chamber Parameter from ROW 2) STORMTECH CHAMBER DATA 4975.51 ft 420.63 cf 4976.53 ft 3185.92 cf 4978.50 ft 3 MC-3500 Chambers Height of System Incremental Single Incremental Total Incremental Stone Incremental Ch & St Cumulative Chamber Stage (inches) (cubic feet) (cubic feet) (cubic feet) (cubic feet) (cubic feet) (feet) 31 0.95 11.41 14.27 25.68 900.96 2.58 30 1.07 12.89 13.68 26.57 875.28 2.50 Volume of :420.63 cf 1.02 ft 19 MC-3500 Chambers Height of System Incremental Single Incremental Total Incremental Stone Incremental Ch & St Cumulative Chamber Stage (inches) (cubic feet) (cubic feet) (cubic feet) (cubic feet) (cubic feet) (feet) 35 0.16 6.84 53.76 60.61 3134.08 2.92 34 0.28 11.84 51.76 63.60 3073.47 2.83 Volume of :3185.92 cf 2.99 ft * Project Number :021-04575 Prepared By: MWB WATER SURFACE ELEVATION LEVELS: FOR WQCV AND 100-YR STORM Project Name:Dog Park Bar Date: 8/17/2022 WQCV Client:0 Basin Name:B1 Input Variables Results Base of Stone Elev. = Req. WQCV Volume = Req. 100-Yr Volume = WQCV WSEL = 100-Yr WSEL = See included ADS StormTech Stage-Storage spreadsheets for full Stage-Storage of the design systems. 100-Year Volume Provided By: Volume Provided By: Per ADS StormTech Stage-Storage for designed system: Per ADS StormTech Stage-Storage for designed system: will be met at Stage: will be met at Stage: WQCV will be met between these two stages: 100-Year Volume will be met between these two stages: acres cfs ft 1 3 4 1 2 1 1 1 1 2 3 WSEL's: Use ADS Stage-Storage spreadsheet for LID and 100-YR systems Paste rows from ADS into tables for WQCV and 100-YR Locate stages on either side of required volumes 1.71Area: Enter Project name, project number, client, basin name, date, and initials Enter project area, C minor, and percent impervious from Rational Method for the compsite basins to be detained Enter maximum allowable release rate ORIFICE: Enter selected chamber type fom drop down 2 Enter base of stone elevation for system Enter orifice diameter (use inch and fraction method in cell equation) WQCV: Select WQCV drain time from drop down PROJECT PARAMETERS Project Name: Dog Park Bar Date: Project Number : 021-04575 Client: Basin Name: B2 MWB 8/17/2022 Prepared By: INSTRUCTIONS: PROJECT: Max Allowable Release Rate: 0.34 69.07% Base of Stone Elevation: 4973.88 0.6907 % IMP: C (minor): ISOLATOR: FAA: STORMTECH: Enter selected chamber type fom drop down Enter selected chamber type fom drop down Intensity tables are available in hidden cells on the left. WQ intensity values are equal to 1/2 the 2-year storm values note 100 0.34 2 1/2 in 2 1/2 inches 0.034 sf 0.610 MC-3500 45.0 in 0.32 cfs 1 0.00 0.00 2 1.88 0.16 3 3.75 0.31 4 5.63 0.47 5 7.50 0.63 6 9.38 0.78 7 11.25 0.94 8 13.13 1.09 9 15.00 1.25 10 16.88 1.41 11 18.75 1.56 12 20.63 1.72 13 22.50 1.88 14 24.38 2.03 15 26.25 2.19 16 28.13 2.34 17 30.00 2.50 18 31.88 2.66 19 33.75 2.81 20 35.63 2.97 21 37.50 3.13 22 39.38 3.28 23 41.25 3.44 24 43.13 3.59 25 45.00 3.75 Client:0 Basin Name:B2 ORIFICE RATING CURVE: OUTLET STRUCTURE ORIFICE SIZING FOR 100-YEAR STORM Project Name:Dog Park Bar Date: 8/17/2022 Project Number :021-04575 Prepared By: MWB ResultsInput Variables Design Storm : Selected Chamber Height = Selected Chamber Type = Orifice Area = Orifice Diameter = PROPOSED ORIFICE RELEASE RATE : PROPOSED ORIFICE DIAMETER :Max. Allowable Release Rate = Orifice Coefficient = 0.27 0.26 0.26 0.25 0.24 0.20 0.19 0.17 Stage (in ) Stage (ft ) Outlet Release Rate (cfs ) 0.32 0.32 0.31 0.30 0.29 If the outlet from the detention basin is under free outfall, the effective head is measured from the centroid of the orifice to the upstream water surface elevation. If the downstream jet or orifice is submerged, then the effective head is the difference in elevation between the upstream and downstream water surfaces. For square-edged, uniform orifice entrance conditions, a discharge coefficient of 0.61 should For rough-edged orifice entrance conditions, a discharge coefficient of 0.4 should be used. 0.00 0.29 0.28 0.16 0.15 0.13 0.11 0.09 0.07 0.23 0.22 0.21 0.271 in A = 1.710 acres V = 0.0463 ac-ft 2017.80 cu. ft CITY OF FORT COLLINS (COFC) CALCULATION FOR: WATER QUALITY CAPTURE VOLUME (WQCV) 40 hr 1.00 Date: Prepared By: Basin Name: Client: Project Number : Project Name: B2 0 021-04575 Dog Park Bar MWB 8/17/2022 i = a = DRAIN TIME WQCV = 69.07% 1 2 3 4 5 6 7 8 9 10 11 12 13 14Total Required WQ Volume [FCSCM Method] (cf)Flow WQ (cfs)Chamber TypeChamber Volume (cf)Chamber + Aggregate Volume (cf)Chamber Release Rate (cfs)Minimum No. of Chambers [FCSCM]Total Release Rate (cfs)Total Required WQ Volume [FAA Method] (cf)Minimum No. of Chambers [FAA]Minimum No. of ChambersTotal Chamber Volume (cf)Total Installed System Volume (cf)B2 2017.80 1.683 MC-3500109.9175.00.036120.430 624.56 612 1318.80 2100SC-740MC-4500 MC-3500 SC-310 SC-160LP30.060.045.016.012.051.0100.0 77.0 34.0 25.00.350GPM/SF85.448.3 86.0 85.4 85.41 CF = 7.481GAL30.2 33.5 46.0 20.2 14.81 GALLON = 0.134CF 45.9106.5109.914.76.91 GPM = 0.002CFS74.9162.6175.031.015.00.024 0.026 0.036 0.016 0.012Client:0Prepared By: MWBDate: 8/17/2022876COLUMN:CITY OF FORT COLLINS (COFC) SIZING CALCUALTIONS FOR LID SYSTEMS: ISOLATOR ROW CHAMBERS WITHIN ADS STORMTECH SYSTEMBasin Name:B2Project Name: Dog Park BarProject Number : 021-04575CHAMBER CONFIGURATION PARAMETERSFCSCM MethodFAA METHODRESULTSBasin Name:Greater number of required chambers through the two metods (Column 8 versus Column 11)Number of chambers required to provide required FAA storage volume stored within the chamber only (no aggregate storage); Rounded upRequired WQCV per FAA Method (based on Flow WQ and Total Release Rate) System volume includes total number of chambers, plus surrounding aggregate. This must meet or exceed the FCSCM Method required WQ VolumeVolume provided within the chambers only (no aggregate storage). This must meet or exceed the FAA Method required WQ VolumeRequired WQCV per FCSCM Equation 7-2Project Name and/or Vault IDRelease rate per chamber times the minimum number of chambers required through the FCSCM MethodNumber of chambers required to provide full WQCV within total installed system, including aggregate; Rounded UpRelease rate per chamber, limited by flow through geotextile with accumulated sediment (Selected Chamber Parameter from ROW 3)Voulme includes chamber and void spaces (40%) in surrounding aggregate (Selected Chamber Parameter from ROW 2)Volume within the chamber only, not accounting for void spaces in surrounding aggregate (Selected Chamber Parameter from ROW 1)Chamber Type SelectionFLOW RATE / CHAMBER (CFS) - ROW 3CHAMBER/AGGREGATE VOLUME (CF) - ROW 2CHAMBER VOLUME (CF) - ROW 11/2 of the 2-year developed flow rate for the basin. *FLOW RATE BASED ON 1/2 OF NOV 07 QMAX IN FIGURE 17 OF UNH TESTING REPORTFLOW RATE*CHAMBER FLOW RATE CONVERSION (GPM/SF TO CFS)STORMTECH CHAMBER DATA914131211103FLOOR AREA (SF)INSTALLED LENGTH (IN)WIDTH (IN)HEIGHT (IN)CHAMBER DIMENSIONS542CONTENTS:1 WQ 0.69 1.00 * C = 0.69 9.00 min 1.710 acres Max Release Rate* =0.430 cfs Time (min ) Time (sec ) Intensity (in/hr ) Inflow Flowrate (cfs ) Inflow Volume (ft 3 ) Outflow Volume (ft 3 ) Storage Volume (ft 3 ) Storage Volume (ac-ft ) 0 0 0.000 0.00 0 0 0 0 5 300 1.425 1.68 505 129 376 0.01 10 600 1.105 1.31 783 258 525 0.01 15 900 0.935 1.10 994 387 607 0.01 20 1200 0.805 0.95 1141 516 625 0.01 25 1500 0.715 0.84 1267 645 621 0.01 30 1800 0.650 0.77 1382 775 607 0.01 35 2100 0.585 0.69 1451 904 547 0.01 40 2400 0.535 0.63 1517 1033 484 0.01 45 2700 0.495 0.58 1579 1162 417 0.01 50 3000 0.460 0.54 1630 1291 339 0.01 55 3300 0.435 0.51 1695 1420 275 0.01 60 3600 0.410 0.48 1743 1549 194 0.00 65 3900 0.385 0.45 1773 1678 95 0.00 70 4200 0.365 0.43 1811 1807 3 0.00 75 4500 0.345 0.41 1834 1936 -103 0.00 80 4800 0.330 0.39 1871 2066 -195 0.00 85 5100 0.315 0.37 1897 2195 -297 -0.01 90 5400 0.305 0.36 1945 2324 -378 -0.01 95 5700 0.290 0.34 1952 2453 -500 -0.01 100 6000 0.280 0.33 1984 2582 -598 -0.01 105 6300 0.270 0.32 2009 2711 -702 -0.02 110 6600 0.260 0.31 2027 2840 -813 -0.02 115 6900 0.255 0.30 2078 2969 -891 -0.02 120 7200 0.245 0.29 2083 3098 -1015 -0.02 B2 0 Prepared By: MWB Dog Park Bar CITY OF FORT COLLINS (COFC) MODIFIED FAA METHOD: REQUIRED DETENTION VOLUME Date: 8/17/2022Project Name: Project Number :021-04575 Client: Basin Name: Input Variables Design Storm C = Results ac-ft0.01 ft3624.56 WQ Volume: Detention Required *DETERMINED BY ISOLATOR ROW PARAMETERS Tc = A = 100-year 0.69 1.25 * C = 0.86 9.00 min 1.710 acres Max Release Rate* =0.32 cfs Time (min ) Time (sec ) Intensity (in/hr ) Inflow Flowrate (cfs ) Inflow Volume (ft 3 ) Outflow Volume (ft 3 ) Storage Volume (ft 3 ) Storage Volume (ac-ft ) 0 0 0.00 0.00 0 0 0 0 5 300 9.95 14.690 4407 97 4310 0.10 10 600 7.72 11.398 6839 194 6645 0.15 15 900 6.52 9.626 8663 291 8373 0.19 20 1200 5.60 8.268 9921 388 9533 0.22 25 1500 4.98 7.352 11028 485 10544 0.24 30 1800 4.52 6.673 12012 582 11430 0.26 35 2100 4.08 6.024 12650 679 11971 0.27 40 2400 3.74 5.522 13252 776 12476 0.29 45 2700 3.46 5.108 13792 872 12920 0.30 50 3000 3.23 4.769 14306 969 13337 0.31 55 3300 3.03 4.473 14762 1066 13696 0.31 60 3600 2.86 4.222 15201 1163 14037 0.32 65 3900 2.72 4.016 15661 1260 14401 0.33 70 4200 2.59 3.824 16060 1357 14703 0.34 75 4500 2.48 3.661 16476 1454 15022 0.34 80 4800 2.38 3.514 16866 1551 15315 0.35 85 5100 2.29 3.381 17243 1648 15595 0.36 90 5400 2.21 3.263 17619 1745 15874 0.36 95 5700 2.13 3.145 17925 1842 16083 0.37 100 6000 2.06 3.041 18248 1939 16309 0.37 105 6300 2.00 2.953 18602 2036 16566 0.38 110 6600 1.94 2.864 18903 2133 16771 0.39 115 6900 1.89 2.790 19253 2230 17024 0.39 120 7200 1.84 2.717 19559 2327 17232 0.40 *DETERMINED BY ORIFICE PARAMETERS Detention Volume: 17232.33 ft3 0.40 ac-ft A = C = 8/17/2022 Project Number :021-04575 Prepared By: MWB 100-year Input Variables Design Storm Tc = Results Required CITY OF FORT COLLINS (COFC) MODIFIED FAA METHOD: REQUIRED DETENTION VOLUME Project Name:Dog Park Bar Date: Client:0 Basin Name:B2 1 2 3 4 5 6 7 8 9 100-Year Required Volume (cf ) Chamber Type Chamber Volume (cf ) Chamber + Aggregate Volume (cf ) Chamber Release Rate (cfs ) Minimum No. of Chambers Total Chamber Volume (cf ) Total Installed System Volume (cf ) B2 17232.3 MC-3500 109.9 175.0 0.036 99 10880.10 17325 COLUMN: 1 2 3 4 5 6 7 8 9 SC-740 MC-4500 MC-3500 SC-310 30.0 60.0 45.0 16.0 51.0 100.0 77.0 34.0 85.4 48.3 86.0 85.4 30.2 33.5 46.0 20.2 45.9 106.5 109.9 14.7 74.9 162.6 175.0 31.0 0.024 0.026 0.036 0.016 0.350 GPM/SF 1 CF = 7.481 GAL 1 GALLON = 0.134 CF 1 GPM = 0.002 CFS SC-160LP Project Number : 25.0 Prepared By: Voulme includes chamber and void spaces (40%) in surrounding aggregate (Selected Chamber Parameter from ROW 2) STORMTECH CHAMBER DATA 85.4 Volume within the chamber only, not accounting for void spaces in surrounding aggregate (Selected Chamber Parameter from ROW 1) Client:0 Basin Name:B2 CHAMBER CONFIGURATION PARAMETERS INSTALLED LENGTH (IN) System volume includes total number of chambers, plus surrounding aggregate. Volume provided within the chambers only (no aggregate storage). Number of chambers required to provide full 100-year storm event storage volume within total installed system, including aggregate; Rounded Up Release rate per chamber, limited by flow through geotextile with accumulated sediment (Selected Chamber Parameter from ROW 3) CHAMBER DIMENSIONS 12.0 WIDTH (IN) HEIGHT (IN) CITY OF FORT COLLINS (COFC) SIZING CALCUALTIONS FOR EXTENDED DETENTION SYSTEMS: ADS STORMTECH SYSTEM FOR 100-YR STORM STORAGE VOLUME Chamber Type Selection Required 100-year storm volume per COFC Modified FAA Method Project Name and/or Vault ID CONTENTS: Basin Name: COFC Modified FAA Method RESULTS Project Name:Dog Park Bar Date: 8/17/2022 021-04575 MWB *FLOW RATE BASED ON 1/2 OF NOV 07 QMAX IN FIGURE 17 OF UNH TESTING REPORT FLOW RATE / CHAMBER (CFS) - ROW 3 14.8 6.9 CHAMBER FLOW RATE CONVERSION (GPM/SF TO CFS) FLOW RATE* 15.0 0.012 FLOOR AREA (SF) CHAMBER VOLUME (CF) - ROW 1 CHAMBER/AGGREGATE VOLUME (CF) - ROW 2 4973.88 ft 2017.80 cf 4980.09 ft 17232.33 cf 4996.18 ft 12 MC-3500 Chambers Height of System Incremental Single Incremental Total Incremental Stone Incremental Ch & St Cumulative Chamber Stage (inches) (cubic feet) (cubic feet) (cubic feet) (cubic feet) (cubic feet) (feet) 31 0.95 11.41 14.27 25.68 900.96 2.58 30 1.07 12.89 13.68 26.57 875.28 2.50 Volume of :2017.80 cf 6.21 ft 99 MC-3500 Chambers Height of System Incremental Single Incremental Total Incremental Stone Incremental Ch & St Cumulative Chamber Stage (inches) (cubic feet) (cubic feet) (cubic feet) (cubic feet) (cubic feet) (feet) 35 0.16 6.84 53.76 60.61 3134.08 2.92 34 0.28 11.84 51.76 63.60 3073.47 2.83 Volume of :17232.33 cf 22.30 ft * See included ADS StormTech Stage-Storage spreadsheets for full Stage-Storage of the design systems. 100-Year Volume Provided By: Volume Provided By: Per ADS StormTech Stage-Storage for designed system: Per ADS StormTech Stage-Storage for designed system: will be met at Stage: will be met at Stage: WQCV will be met between these two stages: 100-Year Volume will be met between these two stages: WQCV Client:0 Basin Name:B2 Input Variables Results Base of Stone Elev. = Req. WQCV Volume = Req. 100-Yr Volume = WQCV WSEL = 100-Yr WSEL = Project Number :021-04575 Prepared By: MWB WATER SURFACE ELEVATION LEVELS: FOR WQCV AND 100-YR STORM Project Name:Dog Park Bar Date: 8/17/2022 LOT 1 COUNTRY CLUB CORNERS 6TH FILING 47,579 SF LOT 3 COUNTRY CLUB CORNERS 6TH FILING 110,722 SF LOT 2 COUNTRY CLUB CORNERS 6TH FILING 47,546 SF LOT 2 COUNTRY CLUB CORNERS 5TH FILING PRIVATE PARKING LOT REVISIONSNO.REV.DATEREVISIONS DESCRIPTIONproject no.: approved by: checked by: drawn by: drawing no.: QA/QC by: date: OLSSON ASSUMES NO RESPONSIBILITY FOR EXISTING UTILITY LOCATIONS (HORIZONTAL OR VERTICAL). THE EXISTING UTILITIES SHOWN ON THIS DRAWING HAVE BEEN PLOTTED FROM THE BEST AVAILABLE INFORMATION. IT IS HOWEVER THE RESPONSIBILITY OF THE CONTRACTOR TO FIELD VERIFY THE LOCATION OF ALL UTILITIES PRIOR TO THE COMMENCEMENT OF ANY CONSTRUCTION ACTIVITIES.www.olsson.comTEL 970.461.7733Suite 200Loveland, CO 805381880 Fall River Drive, DUNCAN DOG PARK DEVELOPMENTCONSTRUCTION DOCUMENTSFORT COLLINS, CO2021021-04575 CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU DIG, GRADE, OR EXCAVATE FOR THE MARKING OF UNDERGROUND MEMBER UTILITIES. CALL UTILITY NOTIFICATION CENTER OF COLORADO Know what'sbelow. before you dig.Call R 07.23.2021 706.30.2021TOWN APPROVED PERMIT SET006.30.2021 DRAINAGE PLANSJD JD RB RB C_DRN01_02104575.dwg ----of C 13.0 REVISIONSNO.REV.DATEREVISIONS DESCRIPTIONproject no.: approved by: checked by: drawn by: drawing no.: QA/QC by: date: OLSSON ASSUMES NO RESPONSIBILITY FOR EXISTING UTILITY LOCATIONS (HORIZONTAL OR VERTICAL). THE EXISTING UTILITIES SHOWN ON THIS DRAWING HAVE BEEN PLOTTED FROM THE BEST AVAILABLE INFORMATION. IT IS HOWEVER THE RESPONSIBILITY OF THE CONTRACTOR TO FIELD VERIFY THE LOCATION OF ALL UTILITIES PRIOR TO THE COMMENCEMENT OF ANY CONSTRUCTION ACTIVITIES. NOTE THIS DOCUMENT HAS BEEN RELEASED BY OLSSON ASSOCIATES ONLY FOR REVIEW BY REGULATORY AGENCIES AND OTHER PROFESSIONALS, AND IS SUBJECT TO CHANGE. THIS DOCUMENT IS NOT TO BE USED FOR CONSTRUCTION.www.olsson.comTEL 970.461.7733Suite 200Loveland, CO 805381880 Fall River Drive, UTILITY PLANS FORLOT 3, COUNTRY CLUB CORNERS 6TH FILINGFORT COLLINS, CO2022021-04575 CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU DIG, GRADE, OR EXCAVATE FOR THE MARKING OF UNDERGROUND MEMBER UTILITIES. CALL UTILITY NOTIFICATION CENTER OF COLORADO Know what'sbelow. before you dig.Call R 08.17.2022 10SIT AND STAY DOG BARofDRAINAGE PLANCS CS RB RB C_DRN01_02104575.dwg 10 10 LID TABLE