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HomeMy WebLinkAboutCivilSection OCTOBER 2021 SITE PLAN APPLICATION HW#1086.018 Civil Section Prepared By: 190 NORTHSTAR LANE BOZEMAN, MT 59718 406-570-3676 www.headwatersmt.net THE RIDGE LOT 7A      190 NORTHSTAR LANE  BOZEMAN, MT  59718   406‐581‐5730  www.headwatersmt.net                                                                Page 1 of 1  Table of Contents  Lot 7a  Site Plan               Tab 1 Cover Letter  Tab 2 CIL Water Rights, Traffic Information, Water & Sewer Calculations, PUD Parking Plan  Tab 3  Civil Sheets   Tab 4  Blank     Tab 5  Soil Data     Tab 6  Existing Plat and Easements  Tab 7  Stormwater Memo, Existing Stormwater Design Report   Tab 8  Construction Management Plan                                                  H:\1086\018\DOCS\Site Plan\1_TOC.doc         190 NORTHSTAR LANE  BOZEMAN, MT  59718   406‐581‐5730  www.headwatersmt.net                                                                Page 1 of 8    Tab 1  Cover Letter       190 NORTHSTAR LANE  BOZEMAN, MT  59718   406‐581‐5730  www.headwatersmt.net                                                                Page 1 of 2  October 6, 2021    City of Bozeman Community Development  20 East Olive Street  Bozeman, MT 59771    Re:  The Ridge Lot 7A  Site Plan Submittal   TBD Fallon St.    Dear Planner,    Please find attached the civil section of the Site Plan Submittal for Lot 7A, as shown on the Amended Plat of  The Ridge Athletic Club Subdivision (J‐465‐A). The proposed project consists of one commercial building,  occupied by one business. The parking lot pavement has already been constructed with the PUD. This letter  summarizes the civil section of the Site Plan Submittal    Planning  1. The project will be completed in one phase.   2. The total floor space of the building is 6,000 square feet, which will be occupied by a chiropractic  office.   3. The site is zoned R‐O, and the max building height is 50 feet, with a roof pitch less than 3:12.  4. The parking calculations and Parking Site Plan submitted with the PUD show 20 parking stalls for Lot  7A, including 2 ADA spaces. There is 1 additional parking spot on Fallon St., and 3 spots on Ravalli St  along the boundary of the lot. The business occupying the building will be a chiropractic office. City  of Bozeman UDC requires 4 spaces per full‐time doctor, plus 1 space per additional full‐time  employee (FTE), so the office has capacity for 5 full‐time doctors and 1 FTE, or other doctor/FTE  combinations that stay at 21 required spaces or less. The PUD Parking Site Plan is included in Tab 1.  5. Digital copies of the current plat are attached in Tab 6.     Engineering  1. The existing regional retention storm pond is proposed to be utilized. The retention pond meets the  requirement of the first 0.5 inch of rainfall to be infiltrated. The Stormwater Design Report  submitted for the PUD in 2017, by C&H Engineers, is included in Tab 7. Also included is a Storm  Water Memo and accompanying calculations for the proposed building.  2. Snow Storage was considered with the PUD. One snow storage area northwest of the proposed  building is shown on the civil drawings.  3. A construction management plan is included in Tab 8.    Water Rights  1. Calculations for the cash in lieu of water rights were sent to Griffin Nielsen. The calculations are  included in Tab 2.    Water & Wastewater  190 Northstar Lane, Bozeman, MT 59718                  (406) 581‐5730                 www.headwatersmt.net                         Page 2 of 2  1. The certified peak hour sewer as well as average and max day domestic water usage is included in  Tab 2.  2. No fire service lines are necessary for the proposed building. If fire service lines are discovered to be  necessary as part of review by the fire department, plans will be completed by a Professional  Engineer.  3. No water wells are proposed with this project.    Transportation  1. The drive access was approved and constructed with the PUD.  2. Using the ITE Trip Generation calculator as estimated 11.03 trips per day per 1000 sf of commercial  building space. Traffic calculations are included in Tab 2.    Utility Plan  1. Existing PUE is shown and noted. Existing and proposed electric, gas, communications, water, sewer  and storm are shown on sheet C‐2.    Grading and Drainage Plan  1. Existing contours are shown at 0.5’ intervals on sheet C‐3.  2. The regional storm pond is the only drainageway in the area. Flow directions are shown using  arrows.    Site Plan  1. Existing infrastructure, setbacks, sidewalks, and existing conditions are shown on sheet C‐1.    Lighting Plan and Details  1. The parking lot lighting plan was approved with the PUD.   2. A photometric plan for the exterior building lights is included with the plan set. The entrance to the  building is illuminated at 5 ft‐candles, and the 1 ft‐candle isometric line does not leach past the  property line.    Parkland Requirements  1. No parkland is proposed, per the approved PUD.     If you have any questions or comments, please contact me at 406‐570‐3676.    Sincerely,     _____                                            Garrett Schultz, P.E.                                                       Headwaters Engineering, Inc.                                                                                                                            H:\1086\018\DOCS\Site Plan\0.1‐cover letter_Lot 7A.doc  190 Northstar Lane, Bozeman, MT 59718                  (406) 581‐5730                 www.headwatersmt.net                           Tab 2  CIL Water Rights, Traffic Information, Water & Sewer Calcs, PUD Parking Plan  Cash In‐Lieu of Water Rights Calculations The Ridge Lot 7A 8/31/2021 Commercial Number of Units 1 Commercial Units Area 6000 sf Demand 0.0000183 AF/yr/sf Total Yearly Demand 0.1098 AF Cash In‐Lieu $6,000 $/AF Commercial Cash In Lieu of Water Rights $659 Irrigation Irrigation Use from Landscape Plan 2526 gallons per week 18 weeks of Irrigation 45468 gallons per year Yearly Irrigation Water 0.14 acre‐feet per year Cash In‐Lieu $6,000 $/AF Irrigation Cash In Lieu of Water Rights $840 Total Cash In‐Lieu of Water Rights $1,499      190 NORTHSTAR LANE  BOZEMAN, MT  59718   406‐581‐5730  www.headwatersmt.net                                                                Page 1 of 1    September 1, 2021    The Ridge Lot 7A  Traffic Calculations      Below are the average daily trips and peak hour trips as calculated use the 8th edition of the ITE Trip  Generation Report.    Office = 11.03 ADT per 1000 sf     Office = 6,000 sf    Office = 6,000sf/1000 x 11.03 ADT = 66 ADT    Total Proposed ADT = 66 ADT    The proposed 66 ADT is less than the planned ADT per the PUD.    If you should have any questions, please do not hesitate to contact me at 406‐570‐3676      Sincerely,     ________________                                                    _                                              Garrett Schultz, P.E.                                                       Headwaters Engineering, Inc.                                              H:\1086\018\DOCS\Site Plan\Concept Review\Reference\traffic summary.doc       190 NORTHSTAR LANE  BOZEMAN, MT  59718   406‐581‐5730  www.headwatersmt.net                                                                Page 1 of 1  The Ridge   Lot 7A of Amended Plat of the Ridge Athletic Club Subdivision    Sanitary Sewer Usage    The proposed project includes roughly 6,000 square feet of commercial space on approximately 0.264 acres.  Utilizing the wastewater flow for Industrial from Table V‐2 of the City of Bozeman Design Regulations, the  estimated commercial flow is 1,200 gallons per acre per day.     Average Commercial Daily Flowrate = 1,200 gal/acre/day x 0.264 acres = 316.8 gpd  Total Average Daily Sewer Flow = 316.8 gpd    The total estimated population includes the commercial equivalent of 25 people (13 gpd per employee per  DEQ Circular 4). The total population of 25 people yielded a peaking factor of 4.37. The peaking factor, PF, was  calculated by the following formula, where P = population (thousands):           PF = 18 + P0.5                4 + P0.5    Using peak hour factor of 4.37 and adding the City’s infiltration allowance of 150 gallons per acre per day  resulted in a combined peak hourly flowrate of 1,740 gpd.     Peak Hourly Flowrate = ADF x PHF + 150 gpd/acre   Peak Hourly Flowrate = 316.8 + 316.8 x 4.37 + 150 gpd x 0.264 ac = 1,740 gpd      Water Usage  The proposed project includes roughly 6,000 square feet of commercial space on approximately 0.264 acres.   Utilizing a commercial rate of 10,000 gallons per 1,000 square foot of commercial area per year results in 0.12  gpm. Using the City’s max day flow factor of 2.3, results in a maximum daily demand of 0.276 gpm. Multiplying  the average daily flow by the City’s peak hour factor of 3, results in a peak hour demand of 0.36 gpm. Local  landscape watering is included in the empirical data.     The building is not equipped with fire sprinklers.     Average Commercial Daily Flowrate = 10,000 gallons per year /1,000 square feet x 6,000 sf / 365 days=   164 gpd = 0.11 gpm      Total Daily Flowrate = 0.11 gpm   Maximum Hour Flowrate = ADF x 3 = 0.11 gpm x 3 = 0.34 gpm  Maximum Daily Flowrate = ADF x 2.3 = 0.12 gpm x 2.3 = 0.262 gpm x 60 min x 24 hr = 378 gpd      Calculations completed by Garrett Schultz, P.E.    H:\1086\018\DOCS\Site Plan\Concept Review\Reference\water ‐sewer usage.doc  E E E E NORTHREF. SITE PARKING PLAN RIDGE PUD FINAL PLAN 01/29/2018 190 Northstar Lane, Bozeman, MT 59718                  (406) 581‐5730                 www.headwatersmt.net                             Tab 3  Civil Sheets  190 Northstar Lane, Bozeman, MT 59718                  (406) 581‐5730                 www.headwatersmt.net                           Tab 4  Blank  190 Northstar Lane, Bozeman, MT 59718                  (406) 581‐5730                 www.headwatersmt.net                           Tab 5  Soil Data  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 Gallatin County Area, MontanaNatural Resources Conservation Service September 1, 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 Gallatin County Area, Montana.......................................................................13 457A—Turner loam, moderately wet, 0 to 2 percent slopes.......................13 Soil Information for All Uses...............................................................................15 Soil Properties and Qualities..............................................................................15 Water Features...............................................................................................15 Depth to Water Table...................................................................................15 References............................................................................................................20 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 50 5 7 8 3 0 50 5 7 8 4 0 50 5 7 8 5 0 50 5 7 8 6 0 50 5 7 8 7 0 50 5 7 8 8 0 50 5 7 8 9 0 50 5 7 9 0 0 50 5 7 9 1 0 50 5 7 9 2 0 50 5 7 9 3 0 50 5 7 9 4 0 50 5 7 9 5 0 50 5 7 8 3 0 50 5 7 8 4 0 50 5 7 8 5 0 50 5 7 8 6 0 50 5 7 8 7 0 50 5 7 8 8 0 50 5 7 8 9 0 50 5 7 9 0 0 50 5 7 9 1 0 50 5 7 9 2 0 50 5 7 9 3 0 50 5 7 9 4 0 50 5 7 9 5 0 492400 492410 492420 492430 492440 492450 492460 492470 492480 492490 492400 492410 492420 492430 492440 492450 492460 492470 492480 492490 45° 40' 30'' N 11 1 ° 5 ' 5 1 ' ' W 45° 40' 30'' N 11 1 ° 5 ' 4 7 ' ' W 45° 40' 26'' N 11 1 ° 5 ' 5 1 ' ' W 45° 40' 26'' N 11 1 ° 5 ' 4 7 ' ' W N Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 12N WGS84 0 30 60 120 180Feet 0 5 10 20 30Meters Map Scale: 1:618 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: Gallatin County Area, Montana Survey Area Data: Version 24, Jun 4, 2020 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Sep 10, 2012—Nov 12, 2016 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 457A Turner loam, moderately wet, 0 to 2 percent slopes 0.9 100.0% Totals for Area of Interest 0.9 100.0% 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 Gallatin County Area, Montana 457A—Turner loam, moderately wet, 0 to 2 percent slopes Map Unit Setting National map unit symbol: 56tb Elevation: 4,300 to 5,200 feet Mean annual precipitation: 15 to 19 inches Mean annual air temperature: 39 to 45 degrees F Frost-free period: 90 to 110 days Farmland classification: Prime farmland if irrigated Map Unit Composition Turner and similar soils:85 percent Minor components:15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Turner Setting Landform:Stream terraces Down-slope shape:Linear Across-slope shape:Linear Parent material:Alluvium Typical profile A - 0 to 6 inches: loam Bt - 6 to 12 inches: clay loam Bk - 12 to 26 inches: clay loam 2C - 26 to 60 inches: very gravelly loamy sand Properties and qualities Slope:0 to 2 percent Depth to restrictive feature:More than 80 inches Drainage class:Well drained Capacity of the most limiting layer to transmit water (Ksat):Moderately high to high (0.57 to 1.98 in/hr) Depth to water table:About 48 to 96 inches Frequency of flooding:None Frequency of ponding:None Calcium carbonate, maximum content:15 percent Maximum salinity:Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Low (about 5.4 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated): 3e Hydrologic Soil Group: B Ecological site: R044BB032MT - Loamy (Lo) LRU 44B-B Hydric soil rating: No Minor Components Meadowcreek Percent of map unit:5 percent Landform:Stream terraces Custom Soil Resource Report 13 Down-slope shape:Linear Across-slope shape:Linear Ecological site:R044XS359MT - Subirrigated (Sb) 15-19" p.z. Hydric soil rating: No Beaverton Percent of map unit:5 percent Landform:Alluvial fans, stream terraces Down-slope shape:Linear Across-slope shape:Linear Ecological site:R044XS354MT - Shallow to Gravel (SwGr) 15-19" p.z. Hydric soil rating: No Turner Percent of map unit:5 percent Landform:Stream terraces Down-slope shape:Linear Across-slope shape:Linear Ecological site:R044XS355MT - Silty (Si) 15-19" p.z. Hydric soil rating: No Custom Soil Resource Report 14 Soil Information for All Uses Soil Properties and Qualities The Soil Properties and Qualities section includes various soil properties and qualities displayed as thematic maps with a summary table for the soil map units in the selected area of interest. A single value or rating for each map unit is generated by aggregating the interpretive ratings of individual map unit components. This aggregation process is defined for each property or quality. Water Features Water Features include ponding frequency, flooding frequency, and depth to water table. Depth to Water Table "Water table" refers to a saturated zone in the soil. It occurs during specified months. Estimates of the upper limit are based mainly on observations of the water table at selected sites and on evidence of a saturated zone, namely grayish colors (redoximorphic features) in the soil. A saturated zone that lasts for less than a month is not considered a water table. This attribute is actually recorded as three separate values in the database. A low value and a high value indicate the range of this attribute for the soil component. A "representative" value indicates the expected value of this attribute for the component. For this soil property, only the representative value is used. 15 16 Custom Soil Resource Report Map—Depth to Water Table 50 5 7 8 3 0 50 5 7 8 4 0 50 5 7 8 5 0 50 5 7 8 6 0 50 5 7 8 7 0 50 5 7 8 8 0 50 5 7 8 9 0 50 5 7 9 0 0 50 5 7 9 1 0 50 5 7 9 2 0 50 5 7 9 3 0 50 5 7 9 4 0 50 5 7 9 5 0 50 5 7 8 3 0 50 5 7 8 4 0 50 5 7 8 5 0 50 5 7 8 6 0 50 5 7 8 7 0 50 5 7 8 8 0 50 5 7 8 9 0 50 5 7 9 0 0 50 5 7 9 1 0 50 5 7 9 2 0 50 5 7 9 3 0 50 5 7 9 4 0 50 5 7 9 5 0 492400 492410 492420 492430 492440 492450 492460 492470 492480 492490 492400 492410 492420 492430 492440 492450 492460 492470 492480 492490 45° 40' 30'' N 11 1 ° 5 ' 5 1 ' ' W 45° 40' 30'' N 11 1 ° 5 ' 4 7 ' ' W 45° 40' 26'' N 11 1 ° 5 ' 5 1 ' ' W 45° 40' 26'' N 11 1 ° 5 ' 4 7 ' ' W N Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 12N WGS84 0 30 60 120 180Feet 0 5 10 20 30Meters Map Scale: 1:618 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 Rating Polygons 0 - 25 25 - 50 50 - 100 100 - 150 150 - 200 > 200 Not rated or not available Soil Rating Lines 0 - 25 25 - 50 50 - 100 100 - 150 150 - 200 > 200 Not rated or not available Soil Rating Points 0 - 25 25 - 50 50 - 100 100 - 150 150 - 200 > 200 Not rated or not available 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: Gallatin County Area, Montana Survey Area Data: Version 24, Jun 4, 2020 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Sep 10, 2012—Nov 12, 2016 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 17 Table—Depth to Water Table Map unit symbol Map unit name Rating (centimeters)Acres in AOI Percent of AOI 457A Turner loam, moderately wet, 0 to 2 percent slopes 183 0.9 100.0% Totals for Area of Interest 0.9 100.0% Custom Soil Resource Report 18 Rating Options—Depth to Water Table Units of Measure: centimeters Aggregation Method: Dominant Component Component Percent Cutoff: None Specified Tie-break Rule: Lower Interpret Nulls as Zero: No Beginning Month: January Ending Month: December Custom Soil Resource Report 19 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 20 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 21 190 Northstar Lane, Bozeman, MT 59718                  (406) 581‐5730                 www.headwatersmt.net                           Tab 6  Existing Plat and Easements  190 Northstar Lane, Bozeman, MT 59718                  (406) 581‐5730                 www.headwatersmt.net                           Tab 7  Stormwater Memo, Existing Stormwater Design Report  190 Northstar Lane, Bozeman, MT 59718                  (406) 581‐5730                 www.headwatersmt.net                         Page 2 of 4   Introduction  The Ridge Lot 7A is part of the Ridge Subdivision PUD. A Stormwater Design Report for the PUD was  submitted by C&H Engineers in 2017. The site plan for Lot 7A includes one commercial building,  matching the PUD. The building is proposed to be single‐level.     The lot is 0.2637 acres, as shown on Amended Plat J‐465‐A for the Ridge Athletic Club Subdivision.  The existing lot is in the SW ¼ Section 10, T2S, R5E, PMM in Bozeman, Gallatin County, Montana. The  lot is currently vacant and zoned R‐O.    The 2017 Stormwater Design Report accounted for development on Lot 7A. However, there is a  small increase of impervious area proposed with the Site Plan for Lot 7A. This memo outlines the  ability of the existing storm water facilities to handle the storm runoff from Lot 7A, including the  small increase in impervious area. The storm water plan follows the design standards set forth by  the City of Bozeman in Design Standards and Specifications Policy, March 2004 and subsequent  addenda.     Storm Water Runoff  Storm water runoff from the project will be conveyed via surface flow in catch curb and gutters to  three proposed storm sewer curb inlets, then on to Retention Pond #1 to the north. Lot 7A  comprises parts of Drainage Area 1 and Drainage Area 2, shown on the Appendix A Map in the  Stormwater Design Report. In the Design Report, Drainage Area 1 included 7,339 square feet of  impervious area, and Drainage Area 2 included 26,785 square feet of impervious area. Due to the  final building design being slightly different from the planned footprint, the actual impervious area in  Drainage Area 1 will be approximately 7,699 square feet, which is 360 square feet greater than  planned. Drainage Area 2 remains at 26,785 square feet of impervious area, as planned. See the  Drainage Area Map in Appendix A of the Storm Water Design Report and the Site Plan for details.    Storm Sewer Facilities  Storm sewer facilities were designed for the 25‐year storm using Manning’s equation. Time to  concentration, contributing area, and weighted C factors were calculated in the Design Report. The  weighted C factors have been adjusted with the revised impervious area, and the runoff was re‐ calculated as shown below:    Drainage Area 1  o Proposed Impervious Area: 7,699 sf  o Impervious Area included in Design Report: 7,339 sf  o Additional Impervious Area to account for: 360 sf  o Proposed Landscaped Area: 6,115 sf  o Landscaped area included in Design Report: 6,475 sf    Gutter Capacity  o Original C Factor from Design Report: 0.6  o Revised C Factor: 0.62 (0.95 x 7,699 + 0.2 x 6,115 / 13,814)  o Q = CIA = .62 x 9.33 x 0.32 = 1.85 cfs required gutter capacity  o Provided Gutter Capacity per Appendix B of the Design Report Calculations = 4.76 cfs  o The gutter has more than enough capacity for the small increase in impervious area    190 Northstar Lane, Bozeman, MT 59718                  (406) 581‐5730                 www.headwatersmt.net                         Page 3 of 4  Pipe #1  o Required Pipe capacity per calculations above: 1.85 cfs  o Available Pipe Capacity per attached FlowMaster calculations: 5.93 cfs  o The 12” PVC has more than enough capacity for the small increase in impervious area    Pipe #1A  o Revised C Factor: 0.74 (0.95 x 34,485 + 0.2 x 13,656 / 48,141)  o Q = CIA = .74 x 3.92 x 1.11 = 3.21 cfs required pipe capacity  o Available Pipe Capacity per attached FlowMaster calculations: 9.79cfs  o The 15” PVC has more than enough capacity for the small increase in impervious area    Pipe #1B  o Revised C Factor: 0.68 (0.95 x 63,787 + 0.2 x 34,961 / 98,748)  o Q = CIA = .68 x 3.92 x 2.27 = 6.08 cfs required pipe capacity  o Available Pipe Capacity per attached FlowMaster calculations: 13.65 cfs  o The 18” PVC has more than enough capacity for the small increase in impervious area    Retention Pond  Retention Pond #1 was sized according to the City of Bozeman Design Standards, to capture the  entire volume of the 10‐year, 2‐hour storm event.    Retention Pond #1  o Revised C Factor: 0.54 (0.95 x 63,787 + 0.2 x 77,037 / 140,824)  o Q = CIA = .54 x 0.41 x 3.23 = 0.71 cfs runoff  o Required Volume for 10‐year, 2‐hour storm = 5,146 cf (0.71 cfs x 60 sec/min x 60 min/hr x 2  hr)  o Available Volume in Retention Pond #1 = 5,800 cf per the design report  o Retention Pond #1 has more than enough capacity to store the 10‐year, 2‐hour storm, even  with the small increase in impervious area    Conclusion  Storm water analysis and calculations indicate that the proposed storm water management plan for  the Ridge Lot 7A project is adequate to safely convey the 10‐year, 25‐year, and 100‐year storm  events while satisfying state and local regulations for peak attenuation and stormwater storage.   Furthermore, the proposed first floor elevations for the structures are all above the estimated 100‐ year Base flood Elevation as determined by Headwaters Engineering.    Appendix A—Calculations  12” PVC Capacity Calcs  15” PVC Capacity Calcs  18” PVC Capacity Calcs     List of References   City of Bozeman Design Standards and Specifications Policy, March 2004, and all addenda.  The Ridge, LLC Subdivision Design Report – (2017 C&H)              H:\1086\018\DOCS\Site Plan\Stormwater Memo_Ridge 7A.doc  190 Northstar Lane, Bozeman, MT 59718                  (406) 581‐5730                 www.headwatersmt.net                         Page 4 of 4        Appendix A  Calculations                                                                                          Project Description Friction Method Manning Formula Solve For Discharge Input Data Roughness Coefficient 0.010 Channel Slope 0.01640 ft/ft Normal Depth 1.00 ft Diameter 1.00 ft Results Discharge 5.93 ft³/s Flow Area 0.79 ft² Wetted Perimeter 3.14 ft Hydraulic Radius 0.25 ft Top Width 0.00 ft Critical Depth 0.95 ft Percent Full 100.0 % Critical Slope 0.01423 ft/ft Velocity 7.55 ft/s Velocity Head 0.89 ft Specific Energy 1.89 ft Froude Number 0.00 Maximum Discharge 6.38 ft³/s Discharge Full 5.93 ft³/s Slope Full 0.01640 ft/ft Flow Type SubCritical GVF Input Data Downstream Depth 0.00 ft Length 0.00 ft Number Of Steps 0 GVF Output Data Upstream Depth 0.00 ft Profile Description Profile Headloss 0.00 ft Average End Depth Over Rise 0.00 % Normal Depth Over Rise 100.00 % Downstream Velocity Infinity ft/s 12" PVC 9/24/2021 2:43:34 PM Bentley Systems, Inc. Haestad Methods Solution CenterBentley FlowMaster V8i (SELECTseries 1) [08.11.01.03] 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 2of1Page GVF Output Data Upstream Velocity Infinity ft/s Normal Depth 1.00 ft Critical Depth 0.95 ft Channel Slope 0.01640 ft/ft Critical Slope 0.01423 ft/ft 12" PVC 9/24/2021 2:43:34 PM Bentley Systems, Inc. Haestad Methods Solution CenterBentley FlowMaster V8i (SELECTseries 1) [08.11.01.03] 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 2of2Page Project Description Friction Method Manning Formula Solve For Discharge Input Data Roughness Coefficient 0.010 Channel Slope 0.01360 ft/ft Normal Depth 1.25 ft Diameter 1.25 ft Results Discharge 9.79 ft³/s Flow Area 1.23 ft² Wetted Perimeter 3.93 ft Hydraulic Radius 0.31 ft Top Width 0.00 ft Critical Depth 1.18 ft Percent Full 100.0 % Critical Slope 0.01176 ft/ft Velocity 7.98 ft/s Velocity Head 0.99 ft Specific Energy 2.24 ft Froude Number 0.00 Maximum Discharge 10.53 ft³/s Discharge Full 9.79 ft³/s Slope Full 0.01360 ft/ft Flow Type SubCritical GVF Input Data Downstream Depth 0.00 ft Length 0.00 ft Number Of Steps 0 GVF Output Data Upstream Depth 0.00 ft Profile Description Profile Headloss 0.00 ft Average End Depth Over Rise 0.00 % Normal Depth Over Rise 100.00 % Downstream Velocity Infinity ft/s 15" PVC 9/24/2021 2:44:33 PM Bentley Systems, Inc. Haestad Methods Solution CenterBentley FlowMaster V8i (SELECTseries 1) [08.11.01.03] 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 2of1Page GVF Output Data Upstream Velocity Infinity ft/s Normal Depth 1.25 ft Critical Depth 1.18 ft Channel Slope 0.01360 ft/ft Critical Slope 0.01176 ft/ft 15" PVC 9/24/2021 2:44:33 PM Bentley Systems, Inc. Haestad Methods Solution CenterBentley FlowMaster V8i (SELECTseries 1) [08.11.01.03] 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 2of2Page Project Description Friction Method Manning Formula Solve For Discharge Input Data Roughness Coefficient 0.010 Channel Slope 0.01000 ft/ft Normal Depth 1.50 ft Diameter 1.50 ft Results Discharge 13.65 ft³/s Flow Area 1.77 ft² Wetted Perimeter 4.71 ft Hydraulic Radius 0.38 ft Top Width 0.00 ft Critical Depth 1.37 ft Percent Full 100.0 % Critical Slope 0.00871 ft/ft Velocity 7.73 ft/s Velocity Head 0.93 ft Specific Energy 2.43 ft Froude Number 0.00 Maximum Discharge 14.69 ft³/s Discharge Full 13.65 ft³/s Slope Full 0.01000 ft/ft Flow Type SubCritical GVF Input Data Downstream Depth 0.00 ft Length 0.00 ft Number Of Steps 0 GVF Output Data Upstream Depth 0.00 ft Profile Description Profile Headloss 0.00 ft Average End Depth Over Rise 0.00 % Normal Depth Over Rise 100.00 % Downstream Velocity Infinity ft/s 18" PVC 9/24/2021 3:13:34 PM Bentley Systems, Inc. Haestad Methods Solution CenterBentley FlowMaster V8i (SELECTseries 1) [08.11.01.03] 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 2of1Page GVF Output Data Upstream Velocity Infinity ft/s Normal Depth 1.50 ft Critical Depth 1.37 ft Channel Slope 0.01000 ft/ft Critical Slope 0.00871 ft/ft 18" PVC 9/24/2021 3:13:34 PM Bentley Systems, Inc. Haestad Methods Solution CenterBentley FlowMaster V8i (SELECTseries 1) [08.11.01.03] 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 2of2Page r \ " \ D E S I G N R E P O R T S T O R M W A T E R M A N A G E M E N T T H E R I D G E , L L C P r e p a r e d f o r : T h e R i d g e , L L C 4 3 2 5 F a l l e n S t r e e t , B o z e m a n , M T 5 9 7 1 8 P r e p a r e d b y : C & H E n g i n e e r i n g a n d S u r v e y i n g , I n c . 1 0 9 1 S t o n e r i d g e D r i v e , B o z e m a n , M T 5 9 7 1 8 ( 4 0 6 ) 5 8 7 - 1 1 1 5 P r o j e c t N u m b e r : 1 6 9 8 1 S e p t e m b e r 2 0 1 7 n n I N T R O D U C T I O N T h e p r o p o s e d R i d g e , L L C m o d i f i c a t i o n s w i l l e x t e n d T h e R i d g e , L L C p a r k i n g l o t w e s t t o R a v a l l i S t r e e t / F a l l o n S t r e e t i n t e r s e c t i o n . S t o r m w a t e r m n o f f f r o m t h e p r o j e c t w i l l b e c o n v e y e d v i a s u r f a c e f l o w i n c a t c h c u r b a n d g u t t e r t o t h r e e p r o p o s e d s t o r m s e w e r c u r b i n l e t . T h e p r o p o s e d i n l e t s f l o w t o a p r o p o s e d r e t e n t i o n p o n d t o t h e n o r t h o f t h e p r o p o s e d p a r k i n g l o t . A d r a i n a g e a r e a m a p i n i n c l u d e d i n A p p e n d i x A . C a l c u l a t i o n s f o r t h e c o n t r i b u t i n g d r a i n a g e a r e a s ( t o t a l a r e a , w e i g h t e d C f a c t o r , a n d t i m e o f c o n c e n t r a t i o n ) a r e i n c l u d e d i n A p p e n d i x B - D . S T O R M S E W E R F A C I L I T I E S D E S I G N S t o r m s e w e r f a c i l i t i e s w e r e s i z e d f o r t h e 2 5 - y r s t o r m u s i n g M a n n i n g ' s E q u a t i o n . F o r e a c h i n l e t , t h e c o n t r i b u t i n g a r e a , w e i g h t e d C f a c t o r , a n d t i m e t o c o n c e n t r a t i o n w e r e c a l c u l a t e d ( s e e A p p e n d i x B ) . T h e s e v a l u e s w e r e i n p u t i n t o M a n n i n g ' s E q u a t i o n t o c h e c k c a p a c i t y a n d f l o w c h a r a c t e r i s t i c s f o r i n l e t s a n d s t o r m d r a i n p i p e s . T h e S t o r m S e w e r S u m m a r y R e p o r t i s i n c l u d e d i n A p p e n d i x C . R E T E N T I O N P O N D D E S I G N P o n d s h a v e b e e n s i z e d a c c o r d i n g t o C i t y o f B o z e m a n D e s i g n S t a n d a r d s . R e t e n t i o n p o n d s a r e s i z e d t o c a p t u r e t h e e n t i r e v o l u m e o f t h e 1 0 - y e a r , 2 - h o u r s t o r m e v e n t . R e t e n t i o n P o n d # 1 R e t e n t i o n P o n d # 1 i s l o c a t e d j u s t n o r t h o f t h e p r o p o s e d p a r k i n g l o t . I t r e c e i v e s r u n o f f f r o m D r a i n a g e A r e a s 1 , 2 a n d 3 , t o t a l i n g 3 . 2 3 a c r e s . R u n o f f f r o m D r a i n a g e A r e a 1 i s c a p t u r e d i n t h e p r o p o s e d s t o r m i n l e t 1 , l o c a t e d s o u t h w e s t o f t h e L o t 9 . F r o m t h i s p o i n t , t h e m n o f f w i l l f l o w i n t o a n 1 2 " P V C p i p e t h a t w i l l c o n v e y m n o f f t o s t o n n i n l e t 1 A , l o c a t e d s o u t h o f L o t 9 . R u n o f f f r o m D r a i n a g e A r e a 2 w i l l a l s o b e c a p t u r e d i n t h e p r o p o s e d s t o r m i n l e t 1 A . F r o m t h i s p o i n t , t h e m n o f f w i l l f l o w i n t o a 1 5 " P V C p i p e t h a t w i l l c o n v e y t h e m n o f f t o s t o r m i n l e t 1 B , l o c a t e d s o u t h w e s t o f t h e p r o p o s e d r e t e n t i o n p o n d . R u n o f f f r o m D r a i n a g e A r e a 3 w i l l a l s o b e c a p t u r e d i n t h e p r o p o s e d s t o r m i n l e t I B . F r o m t h i s p o i n t , t h e r u n o f f w i l l f l o w i n t o a n 1 8 " P V C p i p e t h a t w i l l c o n v e y t h e r u n o f f t o t h e p r o p o s e d r e t e n t i o n p o n d . T h e r e q u i r e d p o n d v o l u m e w a s c a l c u l a t e d t o b e 5 , 1 3 2 c u b i c f e e t . T h e p r o p o s e d p o n d i s d e s i g n e d t o s t o r e 5 , 8 0 0 c u b i c f e e t o f w a t e r . I n t h e c a s e o f l a r g e r s t o r m s b e y o n d t h e p o n d ' s c a p a c i t y t o c a p t u r e a n d i n f i l t r a t e , t h e p o n d w i l l o v e r t o p a n d f l o w n o r t h i n t o a n o v e r f l o w s w a l e t h a t w i l l c o n v e y t h e w a t e r t o t h e e x i s t i n g r e t e n t i o n p o n d . S u p p o r t i n g c a l c u l a t i o n s f o r t h e r e q u i r e d p o n d v o l u m e c a n b e f o u n d i n A p p e n d i x D . n n O f f s i t e F l o w D r a i n a g e A r e a # E X f l o w s t o t h e e x i s t i n g c u r b c u t o n t h e n o r t h w e s t s i d e o f t h e e x i s t i n g R i d g e p a r k i n g l o t . T h i s s t o r m w a t e r c u r r e n t l y d r a i n s t o t h e e x i s t i n g r e t e n t i o n p o n d # 1 t o t h e n o r t h w e s t o f t h e e x i s t i n g R i d g e p a r k i n g l o t . T h e p r o p o s e d c h a n g e s t o t h i s d r a i n a g e a r e a i n c l u d e r e m o v i n g 1 6 , 4 8 4 s q u a r e f e e t o f l a n d s c a p e a n d r e p l a c i n g i t w i t h 1 5 , 9 3 8 s q u a r e f e e t o f h a r d s c a p e , a n d 2 , 9 5 0 s q u a r e f e e t o f l a n d s c a p e . T h e a d d i t i o n a l r e q u i r e d c a p a c i t y o f t h e p o n d t o a c c o m m o d a t e t h i s d e c r e a s e i n l a n d s c a p e a r e a w a s c a l c u l a t e d t o b e 8 4 3 c u b i c f e e t . I n o r d e r t o p r o v i d e a d e q u a t e p o n d v o l u m e t o s t o r e t h i s i n c r e a s e i n r u n o f f , t h e e x i s t i n g r e t e n t i o n p o n d w i l l b e e x p a n d e d t o t h e s o u t h t o a d d 1 , 0 3 0 c u b i c f e e t o f s t o r a g e . S e e a p p e n d i x D f o r s u p p o r t i n g c a l c u l a t i o n s . D r a i n a g e A r e a # E X 2 f l o w s t o t h e e x i s t i n g r e t e n t i o n p o n d # 3 i n t h e s o u t h w e s t c o m e r o f t h e R a v a l l i S t / F e r g u s o n A v e i n t e r s e c t i o n . T h i s p o n d w a s o r i g i n a l l y s i z e d i n 2 0 0 6 , w i t h a c o n t r i b u t i n g a r e a o f 1 . 5 7 a c r e s . O r i g i n a l l y , t h e a m o u n t o f h a r d s c a p e r o o f a r e a w a s u n d e r e s t i m a t e d f o r f u t u r e d e v e l o p m e n t , s o t h e p o n d w a s r e s i z e d t o a c c o m m o d a t e t h i s i n c r e a s e d r o o f a r e a . T h e o r i g i n a l p o n d v o l u m e w a s c a l c u l a t e d t o b e 2 , 1 2 1 c u b i c f e e t . W i t h t h e i n c r e a s e d h a r d s c a p e a r e a , t h e p o n d v o l u m e w a s c a l c u l a t e d t o b e 2 , 6 6 9 c u b i c f e e t . T h e p o n d w a s o r i g i n a l l y i n s t a l l e d w i t h a v o l u m e o f 8 , 1 2 5 c u b i c f e e t a n d t h e r e f o r e w i l l h a v e a d e q u a t e c a p a c i t y t o h o l d t h e a d d i t i o n a l r u n o f f . n n A P P E N D I X A D R A I N A G E A R E A M A P - / - I 0 ^ u ^ C t ^ I i I I : " I S I T r ^ 1 s n § » . 1 ) 1 r f ^ I : I s ' i i o - a I ; I a | § M ^ j ^ - k i - ^ 8 i I 1 i s I ! I I I g 3 R ^ } 1 ^ » - ^ . i - i - u U — & J i - S ^ - , I C ^ S 4 I S r s i g e s / / " ' - — s ! t e ^ ^ \ E f e S : 5 : l i t i l s ? | * - ? p i f i - f } j » • * , - V _ _ ^ — = J U a — A ; - ' - . . ; . r ^ < - i i i , ^ t ' . s c a ' A . - ^ ' ^ - - a u u - • < — S - = A - < s t - \ X t ^ : ^ " l ^ \ Y ' ^ h ^ y " ~ T ^ . ^ - r t ^ " ] , | t = s . ^ s . Q 1 1 i n y h f f l i l l l i f t I I 1 i L 2 ^ J 1 1 T l § i ^ i ) ^ — i ^ J J ! I ' ^ s , I S n . ^ ^ ^ ^ n ' ^ n J ^ ' / ^ x \ : ' m / » ' ^ ^ \ w ; ^ / / • • ; > / S 5 B ^ , , n , Q r n ^ j s n ^ s f 7 I . — i l l - . r S A s £ : ^ \ / / ? / , • • \ / s * f e / e > 5 / ^ ' - g , - s s \ ^ - a g S . s ^ s s / ^ £ / / i S S f e i 8 i t e f c a s i . h s 1 ° / s / " , 2 f t • » / S i < / / I - \ ® 1 ^ a 7 8 i / ! . a a / " / I - s n i o I I J J J I t S i M ! j S L 1 J " I 1 ^ @ l l i l l ^ l l i l j t i l l i l t i l l I , £ n n A P P E N D I X B D R A I N A G E A R E A C A L U L A T I O N S 0 n D r a i n a g e A r e a # 1 1 . C a l c u l a t e A r e a a n d W e i g h t e d C F a c t o r / \ r e a C * C o n t r i b u t i n g A r e a C ( f t 2 ) A r e a R O W H a r d s c a p e 0 . 9 5 7 3 3 9 6 9 7 2 R O W L a n d s c a p e 0 . 2 6 4 7 5 1 2 9 5 O S / P a r k 0 . 2 0 0 L o w - M e d R e s i d e n t i a l 0 . 3 5 0 0 D e n s e R e s i d e n t i a l 0 . 5 0 0 C o m m e r c i a l N e i g h b o r h o o d 0 . 6 0 0 C o m m e r c i a l D o w n t o w n 0 . 8 0 0 I n d u s t r i a l 0 . 8 0 0 T o t a l A = A r e a ( a c r e s ) C = W e i g h t e d C F a c t o r 1 3 8 1 4 8 2 6 7 0 . 3 1 7 1 0 . 6 0 2 . C a l c u l a t e T c ( T i m e t o C o n c e n t r a t i o n ) T c O v e r l a n d F l o w T c = 1 . 8 7 ( 1 . 1 - C C f ) D 1 / 2 / S 1 / 3 S = S l o p e o f B a s i n ( % ) C = R a t i o n a l M e t h o d R u n o f f C o e f f i c i e n t C f = F r e q u e n c y A d j u s t m e n t F a c t o r D = L e n g t h o f B a s i n ( f t ) T c O v e r l a n d F l o w ( m i n u t e s ) T c G u t t e r F l o w T c = L / V / 6 0 V = ( 1 . 4 8 6 / n ) R 2 r a S 1 / 2 n = M a n n i n g s C o e f f i c i e n t R = H y d r a u l i c R a d i u s A / P ( f t ) S = s l o p e ( % ) L = l e n g t h o f g u t t e r ( f t ) V = m e a n v e l o c i t y ( f t / s ) T c G u t t e r F l o w ( m i n u t e s ) = T c T o t a l = 2 . 3 5 0 . 9 5 1 . 1 7 7 . 9 2 1 . 2 4 S t o r m R e t u r n ( y r s ) 2 t o 1 0 1 1 t o 2 5 2 6 t o 5 0 5 1 t o 1 0 0 C f 1 1 . 1 1 . 2 1 . 2 5 r 0 . 0 1 3 0 . 1 3 1 . 6 4 % 0 ( 0 . 1 5 ' b e l o w t o p o f c u r b ) f e 3 . 8 4 f f i » 0 . 0 0 r 1 ^ 4 3 . C a l c u l a t e F l o w ( R a t i o n a l F o r m u l a ) n 0 Q = C I A C = W e i g h t e d C F a c t o r l = 0 . 7 8 T c - 0 6 4 ( i n / h r ) A = a r e a ( a c r e s ) Q = R E Q U I R E D G U T T E R C A P A C I T Y ( c f s ) 0 . 6 0 ( c a l c u l a t e d a b o v e ) ( 2 5 - y r 9 . 3 3 s t o r m ) 0 . 3 2 ( c a l c u l a t e d a b o v e ) ( a s s u m i n g n o c a r r y 1 . 7 7 f l o w ) P R O V I D E D G U T T E R C A P A C I T Y 1 . C a l c u l a t e G u t t e r C a p a c i t y @ 0 . 1 5 ' B e l o w T o p o f C u r b Q = ( 1 . 4 8 6 / n ) A R 2 r a S 1 / 2 n = M a n n i n g s C o e f f i c i e n t A = A r e a ( f t 2 ) P = W e t t e d p e r i m e t e r ( f t ) R = H y d r a u l i c R a d i u s A / P ( f t ) S = s l o p e ( % ) 0 . 0 1 3 1 . 2 4 9 . 2 3 0 . 1 3 1 . 6 4 % ( 0 . 1 5 ' b e l o w t o p o f c u r b ) ( 0 . 1 5 ' b e l o w t o p o f c u r b ) ( 0 . 1 5 ' b e l o w t o p o f c u r b ) Q = P R O V I D E D G U T T E R C A P A C I T Y ( c f s ) B 4 . 7 6 ! n n D r a i n a g e A r e a # 2 1 . C a l c u l a t e A r e a a n d W e i g h t e d C F a c t o r A r e a C * C o n t r i b u t i n g A r e a C ( f t 2 ) A r e a R O W H a r d s c a p e 0 . 9 5 2 6 7 8 5 2 5 4 4 6 R O W L a n d s c a p e 0 . 2 7 5 4 2 1 5 0 8 O S / P a r k 0 . 2 0 0 L o w - M e d R e s i d e n t i a l 0 . 3 5 0 0 D e n s e R e s i d e n t i a l 0 . 5 0 0 C o m m e r c i a l N e i g h b o r h o o d 0 . 6 0 0 C o m m e r c i a l D o w n t o w n 0 . 8 0 0 I n d u s t r i a l 0 . 8 0 0 T o t a l A = A r e a ( a c r e s ) 0 . 7 8 8 0 C = W e i g h t e d C F a c t o r 0 . 7 9 2 . C a l c u l a t e T c ( T i m e t o C o n c e n t r a t i o n ) T c O v e r l a n d F l o w T c = 1 . 8 7 ( 1 . 1 - C C f ) D 1 / 2 / S 1 / 3 S = S l o p e o f B a s i n ( % ) C = R a t i o n a l M e t h o d R u n o f f C o e f f i c i e n t C f = F r e q u e n c y A d j u s t m e n t F a c t o r D = L e n g t h o f B a s i n ( f t ) T c O v e r l a n d F l o w ( m i n u t e s ) T c G u t t e r F l o w T c = L A / / 6 0 V = ( 1 . 4 8 6 / n ) R 2 / 3 S 1 / 2 n = M a n n i n g s C o e f f i c i e n t R = H y d r a u l i c R a d i u s A / P ( f t ) S = s l o p e ( % ) L = l e n g t h o f g u t t e r ( f t ) V = m e a n v e l o c i t y ( f t / s ) T c G u t t e r F l o w ( m i n u t e s ) = 3 4 3 2 7 2 6 9 5 ^ , 2 . 1 1 0 . 7 1 1 . 1 8 3 . 5 4 . 2 4 0 . 0 1 3 0 . 1 3 1 . 3 6 % 1 2 0 3 . 5 0 0 . 5 7 r i S t o r m I R e t u r n ( y r s ) 2 t o 1 0 j 1 1 t o 2 5 2 6 t o 5 0 5 1 t o 1 0 0 C f 1 1 . 1 1 . 2 1 . 2 5 ( 0 . 1 5 ' b e l o w t o p o f c u r b ) 0 n T c T o t a l = 3 . C a l c u l a t e F l o w ( R a t i o n a l F o r m u l a ) Q = C I A C = W e i g h t e d C F a c t o r l = 0 . 7 8 T c - 0 6 4 ( i n / h r ) A = a r e a ( a c r e s ) Q = R E Q U I R E D G U T T E R C A P A C I T Y ( c f s ) 4 . 8 2 0 . 7 9 ( c a l c u l a t e d a b o v e ) ( 2 5 - y r 3 . 9 2 s t o r m ) 0 . 7 9 ( c a l c u l a t e d a b o v e ) ( a s s u m i n g n o c a r r y 2 . 4 2 f l o w ) P R O V I D E D G U T T E R C A P A C I T Y 1 . C a l c u l a t e G u t t e r C a p a c i t y @ 0 . 1 5 ' B e l o w T o p o f C u r b Q = ( 1 . 4 8 6 / n ) A R 2 / 3 S 1 / 2 n = M a n n i n g s C o e f f i c i e n t A = A r e a ( f t 2 ) P = W e t t e d p e r i m e t e r ( f t ) R = H y d r a u l i c R a d i u s A / P ( f t ) S = s l o p e ( % ) 0 . 0 1 3 1 . 2 4 9 . 2 3 0 . 1 3 1 . 3 6 % ( 0 . 1 5 ' b e l o w t o p o f c u r b ) ( 0 . 1 5 ' b e l o w t o p o f c u r b ) ( 0 . 1 5 ' b e l o w t o p o f c u r b ) Q = P R O V I D E D G U T T E R C A P A C I T Y ( c f s ) " 4 . 3 4 ^ n n D r a i n a g e A r e a # 3 1 . C a l c u l a t e A r e a a n d W e i g h t e d C F a c t o r A r e a C * C o n t r i b u t i n g A r e a C ( f t 2 ) A r e a R O W H a r d s c a p e 0 . 9 5 2 9 3 0 2 2 7 8 3 7 R O W L a n d s c a p e 0 . 2 6 3 3 8 1 1 2 6 7 6 O S / P a r k 0 . 2 0 0 L o w - M e d R e s i d e n t i a l 0 . 3 5 0 0 D e n s e R e s i d e n t i a l 0 . 5 0 0 C o m m e r c i a l N e i g h b o r h o o d 0 . 6 0 0 C o m m e r c i a l D o w n t o w n 0 . 8 0 0 I n d u s t r i a l 0 . 8 0 0 T o t a l A = A r e a ( a c r e s ) 2 . 1 2 7 7 C = W e i g h t e d C F a c t o r 0 . 4 4 2 . C a l c u l a t e T c ( T i m e t o C o n c e n t r a t i o n ) T c O v e r l a n d F l o w T c = 1 . 8 7 ( 1 . 1 - C C f ) D 1 / 2 / S 1 / 3 S = S l o p e o f B a s i n ( % ) C = R a t i o n a l M e t h o d R u n o f f C o e f f i c i e n t C f = F r e q u e n c y A d j u s t m e n t F a c t o r D = L e n g t h o f B a s i n ( f t ) T c O v e r l a n d F l o w ( m i n u t e s ) T c G u t t e r F l o w T c = L A / / 6 0 V = ( 1 . 4 8 6 / n ) R 2 / 3 S 1 / 2 n = M a n n i n g s C o e f f i c i e n t R = H y d r a u l i c R a d i u s A / P ( f t ) S = s l o p e ( % ) L = l e n g t h o f g u t t e r ( f t ) V = m e a n v e l o c i t y ( f t / s ) 9 2 6 8 3 4 0 5 1 3 1 . 7 8 0 . 8 7 1 . 1 9 1 . 8 2 . 0 4 0 . 0 1 3 0 . 1 3 1 . 1 6 % 2 0 3 N 3 . 2 3 S t o r m R e t u r n ( y r s ) 2 t o 1 0 1 1 t o 2 5 2 6 t o 5 0 5 1 t o 1 0 0 C f 1 1 . 1 1 . 2 1 . 2 5 ( 0 . 1 5 ' b e l o w t o p o f c u r b ) n 0 T c G u t t e r F l o w ( m i n u t e s ) = T c T o t a l = 1 . 0 5 3 . 0 9 3 . C a l c u l a t e F l o w ( R a t i o n a l F o r m u l a ) Q = C I A C = W e i g h t e d C F a c t o r l = 0 . 7 8 T c - 0 6 4 ( i n / h r ) A = a r e a ( a c r e s ) Q = R E Q U I R E D G U T T E R C A P A C I T Y ( c f s ) 0 . 4 4 ( c a l c u l a t e d a b o v e ) ( 2 5 - y r 5 . 2 1 s t o r m ) 1 . 3 2 ( c a l c u l a t e d a b o v e ) ( a s s u m i n g n o c a r r y 3 . 0 0 f l o w ) P R O V I D E D G U T T E R C A P A C I T Y 1 . C a l c u l a t e G u t t e r C a p a c i t y @ 0 . 1 5 ' B e l o w T o p o f C u r b Q = ( 1 . 4 8 6 / n ) A R 2 / s S 1 / 2 n = M a n n i n g s C o e f f i c i e n t A = A r e a ( f t 2 ) P = W e t t e d p e r i m e t e r ( f t ) R = H y d r a u l i c R a d i u s A / P ( f t ) S = s l o p e ( % ) Q = P R O V I D E D G U T T E R C A P A C I T Y ( c f s ) 0 . 0 1 3 1 . 2 4 9 . 2 3 0 . 1 3 1 . 1 6 % ( 0 . 1 5 ' b e l o w t o p o f c u r b ) ( 0 . 1 5 ' b e l o w t o p o f c u r b ) ( 0 . 1 5 ' b e l o w t o p o f c u r b ) 4 . 0 0 N o t e : G u t t e r c a p a c i t y a r e a w a s m o d i f i e d t o i n c l u d e o n l y c o n t r i b u t i n g a r e a t o t h a t s t r e t c h o f g u t t e r , w h i c h w a s c a l c u l a t e d t o b e 1 . 3 2 a c r e s . n 0 A P P E N D I X C S T O R M S E W E R F A C I L I T I E S C A L C U L A T I O N S n n P i p e # 1 R E Q U I R E D C A P A C I T Y 1 . C a l c u l a t e A r e a a n d W e i g h t e d C F a c t o r c * C o n t r i b u t i n g A r e a C A r e a ( f t 2 ) A r e a R O W H a r d s c a p e 0 . 9 5 7 3 3 9 6 9 7 2 R O W L a n d s c a p e 0 . 2 6 4 7 5 1 2 9 5 O S / P a r k 0 . 2 0 0 L o w - M e d R e s i d e n t i a l 0 . 3 5 0 0 D e n s e R e s i d e n t i a l 0 . 5 0 0 C o m m e r c i a l N e i g h b o r h o o d 0 . 6 0 0 C o m m e r c i a l D o w n t o w n 0 . 8 0 0 I n d u s t r i a l 0 . 8 0 0 T o t a l A = A r e a ( a c r e s ) C = W e i g h t e d C F a c t o r 1 3 8 1 4 8 2 6 7 0 . 3 1 7 1 0 . 6 0 2 . C a l c u l a t e R a i n f a l l I n t e n s i t y ( D u r a t i o n = M a x T c f r o m C o n t r i b u t i n g D r a i n a g e A r e a s ) i = 0 . 7 8 x - 0 6 4 ( 2 5 - y r S t o r m , F i g . 1 - 3 , C O B D e s i g n S t a n d a r d s ) x = s t o r m d u r a t i o n ( h r s ) / ' = r a i n f a l l i n t e n s i t y ( i n . / h r . ) 3 . C a l c u l a t e 2 5 - y r P o n d O u t f l o w R a t e Q = C i A C = R a t i o n a l M e t h o d R u n o f f C o e f f i c i e n t i = r a i n f a l l i n t e n s i t y ( i n . / h r . ) A = A r e a ( a c r e s ) 0 . 0 2 ( D A # 1 ) 9 . 3 3 0 . 6 0 ( c a l c u l a t e d a b o v e ) 9 . 3 3 ( c a l c u l a t e d a b o v e ) 0 . 3 2 ( c a l c u l a t e d a b o v e ) Q = 2 5 - y r P i p e F l o w R a t e ( c f s ) • \ . 7 7 n n P i p e # 1 A R E Q U I R E D C A P A C I T Y 1 . C a l c u l a t e A r e a a n d W e i g h t e d C F a c t o r c * C o n t r i b u t i n g A r e a C A r e a ( f t 2 ) A r e a R O W H a r d s c a p e 0 . 9 5 3 4 1 2 5 3 2 4 1 8 R O W L a n d s c a p e 0 . 2 1 4 0 1 6 2 8 0 3 O S / P a r k 0 . 2 0 0 L o w - M e d R e s i d e n t i a l 0 . 3 5 0 0 D e n s e R e s i d e n t i a l 0 . 5 0 0 C o m m e r c i a l N e i g h b o r h o o d 0 . 6 0 0 C o m m e r c i a l D o w n t o w n 0 . 8 0 0 I n d u s t r i a l 0 . 8 0 0 T o t a l A = A r e a ( a c r e s ) C = W e i g h t e d C F a c t o r 4 8 1 4 1 3 5 2 2 2 1 . 1 0 5 2 0 . 7 3 2 . C a l c u l a t e R a i n f a l l I n t e n s i t y ( D u r a t i o n = M a x T c f r o m C o n t r i b u t i n g D r a i n a g e A r e a s ) i = 0 . 7 8 x - 0 6 4 ( 2 5 - y r S t o r m , F i g . 1 - 3 , C O B D e s i g n S t a n d a r d s ) x = s t o r m d u r a t i o n ( h r s ) / = r a i n f a l l i n t e n s i t y ( i n . / h r . ) 3 . C a l c u l a t e 2 5 - y r P o n d O u t f l o w R a t e Q = C i A C = R a t i o n a l M e t h o d R u n o f f C o e f f i c i e n t i = r a i n f a l l i n t e n s i t y ( i n . / h r . ) A = A r e a ( a c r e s ) 0 . 0 8 ( D A # 2 ) 3 . 9 2 0 . 7 3 ( c a l c u l a t e d a b o v e ) 3 . 9 2 ( c a l c u l a t e d a b o v e ) 1 . 1 1 ( c a l c u l a t e d a b o v e ) Q = 2 5 - y r P i p e F l o w R a t e ( c f s ) 3 . 1 7 n n P i p e # 1 B R E Q U I R E D C A P A C I T Y 1 . C a l c u l a t e A r e a a n d W e i g h t e d C F a c t o r c * C o n t r i b u t i n g A r e a C A r e a ( f t 2 ) A r e a R O W H a r d s c a p e 0 . 9 5 6 3 4 2 7 6 0 2 5 6 R O W L a n d s c a p e 0 . 2 3 5 3 2 1 7 0 6 4 O S / P a r k 0 . 2 0 0 L o w - M e d R e s i d e n t i a l 0 . 3 5 0 0 D e n s e R e s i d e n t i a l 0 . 5 0 0 C o m m e r c i a l N e i g h b o r h o o d 0 . 6 0 0 C o m m e r c i a l D o w n t o w n 0 . 8 0 0 I n d u s t r i a l 0 . 8 0 0 T o t a l A = A r e a ( a c r e s ) C = W e i g h t e d C F a c t o r 9 8 7 4 8 6 7 3 2 0 2 . 2 6 6 9 0 . 6 8 2 . C a l c u l a t e R a i n f a l l I n t e n s i t y ( D u r a t i o n = M a x T c f r o m C o n t r i b u t i n g D r a i n a g e A r e a s ) i = 0 . 7 8 x - 0 6 4 ( 2 5 - y r S t o r m , F i g . 1 - 3 , C O B D e s i g n S t a n d a r d s ) x = s t o r m d u r a t i o n ( h r s ) / = r a i n f a l l i n t e n s i t y ( i n . / h r . ) 3 . C a l c u l a t e 2 5 - y r P o n d O u t f l o w R a t e Q = C i A C = R a t i o n a l M e t h o d R u n o f f C o e f f i c i e n t i = r a i n f a l l i n t e n s i t y ( i n . / h r . ) A = A r e a ( a c r e s ) 0 . 0 8 ( D A # 2 ) 3 . 9 2 0 . 6 8 ( c a l c u l a t e d a b o v e ) 3 . 9 2 ( c a l c u l a t e d a b o v e ) 2 . 2 7 ( c a l c u l a t e d a b o v e ) Q = 2 5 - y r P i p e F l o w R a t e ( c f s ) 6 . 0 5 n n A P P E N D I X D P O N D S I Z I N G C A L C U L A T I O N S n n R e t e n t i o n P o n d # 1 R E Q U I R E D V O L U M E 1 . C a l c u l a t e A r e a a n d W e i g h t e d C F a c t o r c * C o n t r i b u t i n g A r e a C A r e a ( f t 2 ) A r e a R O W H a r d s c a p e 0 . 9 5 6 3 4 2 7 6 0 2 5 6 R O W L a n d s c a p e 0 . 2 7 7 3 9 7 1 5 4 7 9 O S / P a r k 0 . 2 0 0 L o w - M e d R e s i d e n t i a l 0 . 3 5 0 0 D e n s e R e s i d e n t i a l 0 . 5 0 0 C o m m e r c i a l N e i g h b o r h o o d 0 . 6 0 0 C o m m e r c i a l D o w n t o w n 0 . 8 0 0 I n d u s t r i a l 0 . 8 0 0 T o t a l C = W e i g h t e d C F a c t o r 0 . 5 4 2 . C a l c u l a t e R e q u i r e d V o l u m e Q = C I A V = 7 2 0 0 Q C = W e i g h t e d C F a c t o r 0 . 5 4 I = i n t e n s i t y ( i n / h r ) 0 . 4 1 A = A r e a ( a c r e s ) 3 . 2 3 Q = r u n o f f ( c f s ) 0 . 7 1 V = R E Q U I R E D V O L ( f t 3 ) 5 1 3 2 1 4 0 8 2 4 7 5 7 3 5 ( 1 0 y r , 2 h r s t o r m ) n n R e t e n t i o n P o n d # E X ( P o s t - C o n s t r u c t i o n ) R E Q U I R E D V O L U M E 1 . C a l c u l a t e A r e a a n d W e i g h t e d C F a c t o r c * C o n t r i b u t i n g A r e a C A r e a ( f t 2 ) A r e a H a r d s c a p e 0 . 9 5 1 5 9 4 0 1 5 1 4 3 L a n d s c a p e 0 . 2 2 9 5 1 5 9 0 O S / P a r k 0 . 2 0 0 L o w - M e d R e s i d e n t i a l 0 . 3 5 0 0 D e n s e R e s i d e n t i a l 0 . 5 0 0 C o m m e r c i a l N e i g h b o r h o o d 0 . 6 0 0 C o m m e r c i a l D o w n t o w n 0 . 8 0 0 I n d u s t r i a l 0 . 8 0 0 T o t a l C = W e i g h t e d C F a c t o r 0 . 8 3 2 . C a l c u l a t e R e q u i r e d V o l u m e Q = C I A V = 7 2 0 0 Q C = W e i g h t e d C F a c t o r 0 . 8 3 I = i n t e n s i t y ( i n / h r ) 0 . 4 1 A = A r e a ( a c r e s ) 0 . 4 3 Q = r u n o f f ( c f s ) 0 . 1 5 V = R E Q U I R E D V O L ( f t 3 ) 1 0 6 6 1 8 8 9 0 1 5 7 3 3 ( 1 0 y r , 2 h r s t o r m ) N o t e : T h i s v o l u m e i s t h e r e q u i r e d v o l u m e f r o m o n l y t h e a d d i t i o n a l d e v e l o p m e n t , n o t t h e e n t i r e d r a i n a g e a r e a . n n R e t e n t i o n P o n d # E X ( P r e - C o n s t r u c t i o n ) R E Q U I R E D V O L U M E 1 . C a l c u l a t e A r e a a n d W e i g h t e d C F a c t o r c * C o n t r i b u t i n g A r e a C A r e a ( f t 2 ) A r e a H a r d s c a p e 0 . 9 5 0 0 L a n d s c a p e 0 . 2 1 6 4 8 4 3 2 9 7 O S / P a r k 0 . 2 0 0 L o w - M e d R e s i d e n t i a l 0 . 3 5 0 0 D e n s e R e s i d e n t i a l 0 . 5 0 0 C o m m e r c i a l N e i g h b o r h o o d 0 . 6 0 0 C o m m e r c i a l D o w n t o w n 0 . 8 0 0 I n d u s t r i a l 0 . 8 0 0 T o t a l C = W e i g h t e d C F a c t o r 0 . 2 0 2 . C a l c u l a t e R e q u i r e d V o l u m e Q = C I A V = 7 2 0 0 Q C = W e i g h t e d C F a c t o r 0 . 2 0 I = i n t e n s i t y ( i n / h r ) 0 . 4 1 A = A r e a ( a c r e s ) 0 . 3 8 Q = r u n o f f ( c f s ) 0 . 0 3 V = R E Q U I R E D V O L ( f t 3 ) 2 2 3 1 6 4 8 4 3 2 9 7 ( 1 0 y r , 2 h r s t o r m ) N o t e : T h i s v o l u m e i s t h e r e q u i r e d v o l u m e f r o m o n l y t h e p r e - d e v e l o p e d l a n d s c a p e , n o t t h e e n t i r e d r a i n a g e a r e a . n n R e t e n t i o n P o n d # E X 2 ( O r i g i n a l C o n t r i b u t i n g A r e a s ) R E Q U I R E D V O L U M E 1 . C a l c u l a t e A r e a a n d W e i g h t e d C F a c t o r c * C o n t r i b u t i n g A r e a C A r e a ( f t 2 ) A r e a R O W H a r d s c a p e 0 . 9 5 2 3 4 7 7 2 2 3 0 3 R O W L a n d s c a p e 0 . 2 0 0 O S / P a r k 0 . 2 4 4 9 6 4 8 9 9 3 L o w - M e d R e s i d e n t i a l 0 . 3 5 0 0 D e n s e R e s i d e n t i a l 0 . 5 0 0 C o m m e r c i a l N e i g h b o r h o o d 0 . 6 0 0 C o m m e r c i a l D o w n t o w n 0 . 8 0 0 I n d u s t r i a l 0 . 8 0 0 T o t a l C = W e i g h t e d C F a c t o r 0 . 4 6 2 . C a l c u l a t e R e q u i r e d V o l u m e Q = C I A V = 7 2 0 0 Q C = W e i g h t e d C F a c t o r 0 . 4 6 I = i n t e n s i t y ( i n / h r ) 0 . 4 1 A = A r e a ( a c r e s ) 1 . 5 7 Q = r u n o f f ( c f s ) 0 . 2 9 E x i s t i n g P o n d V o l u m e = 8 , 1 2 5 V = R E Q U I R E D V O L ( f t 3 ) 2 , 1 2 1 6 8 4 4 1 3 1 2 9 6 ( 1 0 y r , 2 h r s t o r m ) N o t e : T h i s v o l u m e i s t h e o r i g i n a l d e s i g n v o l u m e f r o m 2 0 0 6 , w h i c h s l i g h t l y u n d e r e s t i m a t e d t h e f u t u r e h a r d s c a p e ( r o o f ) a r e a . n 0 R e t e n t i o n P o n d # E X 2 ( N e w C o n t r i b u t i n g A r e a s ) R E Q U I R E D V O L U M E 1 . C a l c u l a t e A r e a a n d W e i g h t e d C F a c t o r c * C o n t r i b u t i n g A r e a C A r e a ( f t 2 ) A r e a R O W H a r d s c a p e 0 . 9 5 3 4 2 6 5 3 2 5 5 1 R O W L a n d s c a p e 0 . 2 0 0 O S / P a r k 0 . 2 3 4 1 7 6 6 8 3 5 L o w - M e d R e s i d e n t i a l 0 . 3 5 0 0 D e n s e R e s i d e n t i a l 0 . 5 0 0 C o m m e r c i a l N e i g h b o r h o o d 0 . 6 0 0 C o m m e r c i a l D o w n t o w n 0 . 8 0 0 I n d u s t r i a l 0 . 8 0 0 T o t a l C = W e i g h t e d C F a c t o r 0 . 5 8 2 . C a l c u l a t e R e q u i r e d V o l u m e Q = C I A V = 7 2 0 0 Q C = W e i g h t e d C F a c t o r 0 . 5 8 I = i n t e n s i t y ( i n / h r ) 0 . 4 1 A = A r e a ( a c r e s ) 1 . 5 7 Q = r u n o f f ( c f s ) 0 . 3 7 E x i s t i n g P o n d V o l u m e = 8 , 1 2 5 V = R E Q U I R E D V O L ( f t 3 ) 2 , 6 6 9 6 8 4 4 1 3 9 3 8 7 ( 1 0 y r , 2 h r s t o r m ) I N S P E C T I O N A N D M A I N T E N A N C E F O R S T O R M W A T E R M A N A G E M E N T F A C I L I T I E S T h e P r o p e r t y O w n e r s A s s o c i a t i o n s h a l l b e r e s p o n s i b l e f o r t h e m a i n t e n a n c e o f t h e s t o r m w a t e r d r a i n a g e f a c i l i t i e s w i t h i n t h e R i d g e A t h l e t i c C l u b C a m p u s . S t o r m W a t e r F a c i l i t i e s : 1 . D r a i n a g e s w a l e s s l o p e t o w a r d r e t e n t i o n a n d d e t e n t i o n p o n d s t o c o l l e c t s t o r m w a t e r r u n o f f a n d c h a n n e l i t t o t h e r e t e n t i o n o r d e t e n t i o n p o n d . 2 . R e t e n t i o n P o n d s c o l l e c t s t o r m w a t e r r u n o f f a n d s t o r e t h e w a t e r u n t i l i t e v a p o r a t e s a n d / o r i n f i l t r a t e s i n t o t h e g r o u n d . 3 . D e t e n t i o n p o n d s c o l l e c t s t o r m w a t e r r u n o f f w h i l e a l l o w i n g s o m e w a t e r t o d r a i n t o a n o t h e r l o c a t i o n . 4 . C u l v e r t s a r e p i p e s w h i c h c h a n n e l s t o r m w a t e r f r o m d i t c h e s o r s w a l e s u n d e r r o a d s . 5 . P i p e N e t w o r k s c o n v e y s t o r m w a t e r t o d i f f e r e n t d i s c h a r g e l o c a t i o n s u n d e r g r o u n d . 6 . I n l e t s a r e f a c i l i t i e s w h e r e s t o r m w a t e r m n o f f e n t e r s a p i p e n e t w o r k . I n l e t s i n c l u d e s t o r m w a t e r m a n h o l e s a n d d r a i n s . 7 . C a t c h B a s i n s a r e s u m p s t y p i c a l l y l o c a t e d d i r e c t l y b e l o w s t o r m w a t e r i n l e t s a n d a l l o w s e d i m e n t t o s e t t l e b e f o r e s t o r m w a t e r e n t e r s t h e p i p e n e t w o r k . 8 . O u t l e t s a r e p o i n t s w h e r e s t o r m w a t e r e x i t s a p i p e n e t w o r k . 9 . D r y w e l l s a r e u n d e r g r o u n d s t o r m w a t e r c o l l e c t i o n f a c i l i t i e s t h a t c o l l e c t a n d t e m p o r a r i l y s t o r e r u n o f f f r o m r o o f t o p s a n d l a n d s c a p e d a r e a s b e f o r e a l l o w i n g s t o r m w a t e r t o i n f i l t r a t e i n t o t h e g r o u n d . P o s t C o n s t r u c t i o n I n s p e c t i o n : 1 . O b s e r v e d r a i n t i m e i n r e t e n t i o n p o n d s f o r a s t o r m e v e n t a f t e r c o m p l e t i o n o f t h e f a c i l i t y t o c o n f i r m t h a t t h e d e s i r e d d r a i n t i m e h a s b e e n o b t a i n e d . I f e x c e s s i v e l y s l o w i n f i l t r a t i o n r a t e s a r e o b s e r v e d t h e n e x c a v a t e a m i n i m u m 5 f t b y 5 f t d r a i n t o n a t i v e g r a v e l s ( o r n a t i v e w e l l - d r a i n i n g m a t e r i a l ) a n d b a c k f i l l w i t h w e l l - d r a i n i n g m a t e r i a l ( p i t - r u n ) . 2 . O b s e r v e t h a t d r y w e l l s , c a t c h b a s i n s , a n d o u t l e t s t r u c t u r e s a r e c l e a r o f a n y m a t e r i a l o r o b s t r u c t i o n s i n t h e d r a i n a g e s l o t s . I n s p e c t t h e s e s t r u c t u r e s t o i n s u r e p r o p e r d r a i n a g e f o l l o w i n g a s t o r m e v e n t . I m m e d i a t e l y i d e n t i f y a n d r e m o v e o b j e c t s r e s p o n s i b l e f o r c l o g g i n g i f n o t d r a i n i n g p r o p e r l y . S e m i - A n n u a l I n s p e c t i o n : 1 . C h e c k r e t e n t i o n p o n d s a n d d r y w e l l s t h r e e d a y s f o l l o w i n g a s t o r m e v e n t e x c e e d i n g ' / 4 i n c h o f p r e c i p i t a t i o n . F a i l u r e f o r w a t e r t o p e r c o l a t e w i t h i n t h i s t i m e p e r i o d i n d i c a t e s c l o g g i n g o r p o o r - d r a i n i n g s o i l s . C l e a r a n y c l o g s a n d r e p l a c e a n y p o o r - d r a i n i n g s o i l s w i t h w e l l - d r a i n i n g g r a v e l y s o i l s . 2 . C h e c k f o r g r a s s c l i p p i n g s , l i t t e r , a n d d e b r i s i n d r a i n a g e s w a l e s , c a t c h b a s i n s , d r y w e l l s , c u l v e r t s a n d r e t e n t i o n p o n d s . F l u s h a n d / o r v a c u u m d r y w e l l s o r s t o r m w a t e r p i p e s i f e x c e s s i v e m a t e r i a l i s o b s e r v e d i n t h e f a c i l i t i e s . S t a n d a r d M a i n t e n a n c e : 1 . R e m o v e s e d i m e n t a n d o i l / g r e a s e f r o m r e t e n t i o n p o n d s a n d d e t e n t i o n 2 . I n s p e c t a n d r e m o v e d e b r i s f r o m d r a i n a g e s w a l e s , c a t c h b a s i n s , d r y w e l l s , a n d r e t e n t i o n p o n d s . U s e a v a c u u m t r u c k t o c l e a n c a t c h b a s i n s a n d d r y w e l l s . 3 . M o n i t o r h e a l t h o f v e g e t a t i o n a n d r e v e g e t a t e a s n e c e s s a r y t o m a i n t a i n f u l l v e g e t a t i v e c o v e r . 4 . I n s p e c t f o r t h e f o l l o w i n g i s s u e s : d i f f e r e n t i a l a c c u m u l a t i o n o f s e d i m e n t , d r a i n t i m e , s i g n s o f p e t r o l e u m h y d r o c a r b o n c o n t a m i n a t i o n ( o d o r s , o i l s h e e n i n p o n d w a t e r ) , s t a n d i n g w a t e r , t r a s h a n d d e b r i s . S e d i m e n t a c c u m u l a t i o n : I n m o s t c a s e s , s e d i m e n t f r o m a r e t e n t i o n p o n d d o e s n o t c o n t a i n t o x i n s a t l e v e l s p o s i n g a h a z a r d o u s c o n c e r n . H o w e v e r , s e d i m e n t s s h o u l d b e t e s t e d f o r t o x i c a n t s i n c o m p l i a n c e w i t h c u r r e n t d i s p o s a l r e q u i r e m e n t s a n d i f l a n d u s e s i n t h e d r a i n a g e a r e a i n c l u d e c o m m e r c i a l o r i n d u s t r i a l z o n e s , o r i f v i s u a l o r o l f a c t o r y i n d i c a t i o n s o f p o l l u t i o n a r e n o t i c e d . S e d i m e n t s c o n t a i n i n g h i g h l e v e l s o f p o l l u t a n t s s h o u l d b e d i s p o s e d o f i n a c c o r d a n c e w i t h a p p l i c a b l e r e g u l a t i o n s a n d t h e p o t e n t i a l s o u r c e s o f c o n t a m i n a t i o n s h o u l d b e i n v e s t i g a t e d a n d c o n t a m i n a t i o n p r a c t i c e s t e r m i n a t e d . The Ridge Lot 7A  Fallon St.      Storm Water Facilities Operation & Maintenance Manual    Overview   The onsite Owners Association is responsible for maintenance of all of the onsite Storm Water Facilities, sidewalk  chases, curb cuts, storm structures, and storm swales per the submitted Design Report for Stormwater Management of  the Ridge, LLC.        190 Northstar Lane, Bozeman, MT 59718                  (406) 581‐5730                 www.headwatersmt.net                           Tab 8  Construction Management Plan                                                                                                     190 NORTHSTAR LANE  BOZEMAN, MT  59718   406‐581‐5730  www.headwatersmt.net                                                                Page 1 of 1  September 29, 2021    The Ridge Lot 7A – Construction Management Plan     The applicant plans to construct the building all at once, with no phasing. Site grading and parking lots have already  been constructed. The Contractor will construct the building, followed by landscaping. Garbage and materials will be  managed throughout the duration of construction. Below is a description of the Construction Management Plan.    PHASE 1  1. Site grading  Already completed.    2. Infrastructure Installation  Already completed.    3. Parking Lot   Already completed.    4. Building Pad Construction  Waste material from the foundation digout will be hauled and disposed of off site. Suitable fill for the building  base and sub‐base will be trucked in as needed.     5. Building Construction  During the construction of the building, a 20‐30 cubic yard dumpster will be on site to manage the waste  generated by the buildings. A portable toilet will be on site during all phases of construction. The building  materials will be stored in the staging area during construction.    6. General Management  During this phase of construction, the site will be accessed by the paved parking lot access roads. The entire  parking lot has already been paved, allowing for an all‐weather staging/construction area.    The existing hydrant on the southwest corner of the property will be utilized for any firefighting needs. The  construction accesses shall also remain open to allow a secondary access for the EMS services.        It is the owner’s intention that the building will not be started until funding is completely secured to ensure that a  partial building is not constructed.       H:\1086\018\DOCS\Site Plan\Concept Review\Reference\construction management plan.doc  8 S S 8 S S 8 SS 8 SS 8 S S 8 W E E E E E T T T E E E E E E E E E T T G G G G G G G G / / / / / / / / / ////// / / / / / / /// /// /// ///////// / / / / / / //////////// /// ////////////////// / / / / / / / / / ///////// / / / / / / / / / / / / / / / / / / / / / /// /// /// ///////// / / / / / / / / / / / / / / / / / / / / / /// ////// / / / /// /// /// / / / / / / / / / /// / / / / / / / / / / / / /// / / / / / / / / / /// /// /// / / / / / / / / / /////////////// / / / /////////////// 12 W 12 W / / / / / / / / / / / / / / / / / / ////// /// /// / / / / / / / / / / / / / / / / / / / / / ////// S D S D S D S D E SSWSGT11"X17": 1"= 40 ft NGRAPHIC SCALE1 inch = ft.0( IN FEET )102020 2 0 H:\1086\018\ACAD\SHEETS\CM-1_CONSTRUCTION MANAGEMENT PLAN.dwg Plot Date: 10/1/2021 5:55 PM H E A D W A T E R S P R O J E C T N U M B E R D R A W I N G N U M B E R D R A W N B Y : D A T E : 2 0 2 1 V E R I F Y S C A L E T H E S E P R I N T S M A Y B E R E D U C E D . L I N E B E L O W M E A S U R E S O N E I N C H O N O R I G I N A L D R A W I N G . M O D I F Y S C A L E A C C O R D I N G L Y © H E A D W A T E R S E N G I N E E R I N G , I N C . R E V I S I O N D A T E : 1 9 0 N O R T H S T A R L A N E , B O Z E M A N , M T 5 9 7 1 8 H E A D W A T E R S M T . N E T 4 0 6 - 5 8 1 - 5 7 3 0 P R O J E C T L O C A T I O N M O N T A N A B O Z E M A N 1 0 / 0 1 / 2 1 G P S C O N S T R U C T I O N M A N A G E M E N T P L A N T B D F A L L O N S T . T H E R I D G E L O T 7 A 1 0 8 6 . 0 1 8 C M - 1 S U B J E C T P R O P E R T Y L O T 7 A 0 . 2 5 A C R E S 15' FRONT SETBACK EXISTINGRESIDENCE E X I S T I N G C O M M E R C I A L B U I L D I N G R I D G E C A M P U S P R O P E R T Y O W N E R S A S S O C . P R I V A T E C O M M O N A R E A # 1 - A & 2 & S H A R E D P A R K I N G A R E A 1 0 . 0 5 A C R E S G A L L A T I N V A L L E Y H E A L T H & F I T N E S S G R O U P L O T 2 A 0 . 2 8 A C R E S STILLWATERCREEK DR. T O F E R G U S O N A V E . EXISTING FIRE HYDRANT E X I S T I N G C O M M E R C I A L B U I L D I N G EXISTINGRESIDENCE R A V A L L I S T . 60 ' R O W 1 5 ' F R O N T S E T B A C K 5 ' S I D E S E T B A C K 5' S I D E S E T B A C K EXISTIN G RESIDEN C E E X I S T I N G P A R K I N G L O T E X I S T I N G P A R K I N G L O T EXISTING 5' SIDEWALK P R O P E R T Y B O U N D A R Y B U I L D I N G 1 E X I S T I N G T R A S H E N C L O S U R E S P E R P U D D R A W I N G S B U I L D I N G F O O T P R I N T , T Y P P R O P O S E D A C U N I T 10 5 . 0 0 ' E X I S T I N G R E T E N T I O N P O N D 105.06' 1 1 1 . 1 5 ' CONSTRUCTION NOTES:1. CONSTRUCTION TRAFFIC WILL LEAVE THE SITE THROUGH FALLON ST. ANDTHEN TRAVEL TO FERGUSON AVE.EXISTING LIGHTFALLON ST.(60' R.O.W.)LEGENDUNDERGROUND ELECTRIC SEWER PIPEWATER SERVICE LINEEASEMENT OR SETBACK AS LABELEDUNDERGROUND GAS LINEUNDERGROUND COMMUNICATION LINE EXISTING CONTOURS 0.5' INTERVAL4" IRRIGATION CONDUITPROPOSED SIDEWALK EXISTING CURB AND SIDEWALK EXISTING 5' BOULEVARD SIDEWALK 107.64'37' TBC TO TBC 7 . 0 ' 7' 7 . 0 ' E X I S T I N G L I G H T 1 ON-STREET SPACE (7'X24')3 ON-STREET SPACES (7'X24') E X I S T I N G S T O R M I N L E T E X I S T I N G S T O R M I N L E T E X I S T I N G S T O R M I N L E T EXISTING 12' PUE PERMINOR SUB 365 3 0 C Y D R O L L O F F D U M P S T E R TOPSOIL STOCKPILE AREA M A T E R I A L S T A G I N G A R E A F E N C I N G T O C O N T A I N D E B R I S C O N S T R U C T I O N R E S T R O O M