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Last modified
1/26/2010 10:12:26 AM
Creation date
10/5/2006 5:00:47 AM
Metadata
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Template:
Floodplain Documents
County
El Paso
Community
Colorado Springs
Basin
Arkansas
Title
The City of Colorado/Springs/El Paso County Drainage Criteria Manual
Date
11/1/1986
Prepared By
Colorado Springs
Floodplain - Doc Type
Educational/Technical/Reference Information
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<br />II <br /> <br />i <br /> <br />il <br />:1 <br />jl <br />I <br />,I <br />il <br /> <br />f <br /> <br />:1 <br />, <br />I <br /> <br />Iii <br />il <br />il <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />channels, stonn sewer grading plan, catch basins, culverts and other <br />hydraulics will be located and sized to meet requirements of the initial <br />and major drainage system. Soil reports should also be included with the <br />PDR (see submittal requirements in Chapter 4). <br /> <br />Final Drainage Report - The purpose of a Final Drainage Report (FDR) is to <br />analyze all drainage features of the proposed development in the detail <br />necessary to complete construction plans for all project drainage <br />structures, including grading details and street grades, and offsite <br />facilities as applicable. <br /> <br />THE CITY DF CDLDRADO SPRINGS AND EL PASO COUNTY (CITY/COUNTY) DRAINAGE <br />PLANNING PROCESS REQUIRE DESIGNERS OF STORM WATER DRAINAGE FACILITIES <br />WITHIN THE RESPECTIVE JURISDICTIONAL BOUNDARIES TO FOLLOW THE PLANNING AND <br />DESIGN GUIDELINES PRESENTED HEREIN. THE RESPECTIVE AND RELEVANT DETAILS <br />OF A DRAINAGE INVESTIGATION(S) WILL BE DEPENDENT UPON THE LEVEL OF STUDY <br />REQUIRED, i.e., DRAINAGE BASIN PLANNING STUDY, MASTER DEVELOPMENT DRAINAGE <br />PLAN, PRELIMINARY DESIGN REPORT OR FINAL DESIGN REPORT. <br /> <br />1.2.3 Drainage Systems <br /> <br />Every urban area has two separate and distinct drainage systems, whether <br />or not they are actually planned for and designed. One is the initial <br />system, and the other is the major system. To provide for an orderly <br />urban growth, reduce costs to future generations, and prevent loss of life <br />and major property damage, both systems must be pl anned and properly <br />engineered. <br /> <br />Initial Stonn Provisions - The initial storm drainage system is necessary <br />to reduce street maintenance costs, to provide protection against <br />frequently occurring sto.rm runoff, to help design and implement an orderly <br />urban system, and to provide convenience to the urban residents. The <br />initial drainage system cannot economically carry major runoff, though the <br />major drainage system can provide for the 100-year storm runoff. Storm <br />sewer systems consisting of underground pipes are a part of initial storm <br />drainage systems. A well-planned major drainage system can reduce the <br />need for stonn sewer systems. <br /> <br />Major Storm Provisions - In addition to providing the storm drainage <br />facilities for the initial storm runoff, provisions shall be taken to <br />JIltO] .,.hi"'~~"'._i!lt~1f8llIage and loss of Hfe' f-or . tftelOO"!~eir..iWt!l . <br />rl.ll:l.oU. Such provisions are known as the major drainage system. Where <br />the iOO-year storm is not selected for design purposes, _,~j;."..j;,fte" <br />1Q,Q,~,~tQ!;lll.,iAaJl'_1rI\la&tlga.ted and ade~uate overflow facilities will <br />be provided. <br /> <br />THE CITY/COUNTY DRAINAGE POLICY REQUIRES ALL NEW DEVELOPMENT TO. INCLUDE <br />......... . PL."..;l~1.!~R, DESIGN AND CONSTRUCTION OF INITIAL ~ <br />. IN ACCORDANCE WITH THE CRITERIA PRESENTEtr'ilrRtnr:""""~" <br />, __3j:..-~'O' <br /> <br />1-6 <br />
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