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<br />TABLE OF CONTENTS
<br />
<br />LETTER OF TRANSMITTAL
<br />
<br />SECTION I - EXECUTIVE SUMMARY
<br />Urban Drainage and Flood Control District
<br />Recommended Solution
<br />Ra ls ton Creek . . . . . . . . . ,
<br />Leyden Creek . . . , . . . . . .
<br />Appendix to Section I, Phase A Summary
<br />
<br />SECTION II - BASIN DESCRIPTIONS
<br />Upper Ralston Creek Basin .,.,
<br />Lower Ralston Creek Basin (Rural) . .
<br />Lower Ralston Creek Basin (Urbanized)
<br />Leyden Creek
<br />Van Bibber Creek
<br />Geologic Setting
<br />
<br />SECTION I II - HYDROLOGICAL SUMMARY
<br />General ' . . . .
<br />Rainfall Patterns. . .
<br />Infiltration . . . , .
<br />Determination of Design Flows - MITCAT
<br />Ralston Creek Flood Hydrology
<br />Appendix to Section I II, Hydrologic Data
<br />
<br />SECTION IV - FLOOD PLAINS AND FLOOD DAMAGES
<br />Flood Plains
<br />Flood Damages . . . . . . . . . . . , . .
<br />
<br />SECTION V - PHASE A ALTERNATIVES
<br />
<br />SECTION VI - PHASE A BENEFIT/COST ANALYSIS
<br />General . . . . . .
<br />Secondary Benefits . . , . .
<br />Intangible Benefits. . . , .
<br />Flood Damages of Alternatives
<br />Flood PIa in Acq u is i t ion , , .
<br />Irrigation Structures
<br />Nonstructural Strategy Costs
<br />
<br />SECTION VII - PHASE A RECOMMENDATIONS AND PHASE B SPECIFIC DIRECTION
<br />
<br />SECTION VIII - PHASE B MASTER PLAN
<br />General Comments ......
<br />Typical Master Plan Improvements
<br />The Master Plan .,'....
<br />Ralston Creek from Clear Creek to Grandview Avenue - Station
<br />0+00 to 9+00 . . . . . , . . , . , . .' .......
<br />Ralston Creek from Above Grandview Avenue to Above Pierce Street
<br />S ta t ion 9+00 to 60+00 . . , . . . . , . . . . . . . . . . . , . .
<br />
<br />..
<br />
<br />SECTION VI II (Continued)
<br />Ralston Creek from Above Pierce Street to Below State Highway
<br />12 I - S ta t ion 60+00 to 70+00 . . . . , . . . . . . . . . . .
<br />Ralston Creek from Below State Highway 121 to AbOve Wadsworth
<br />Boulevard - Station 70+00 to 95+00 . . . . . . . . . . . . .
<br />Ralston Creek from Above Wadsworth Boulevard to Below Garrison
<br />Street - Station 95+00 to 140+00 ..., , . . . . , .
<br />Ralston Creek from Below Garrison Street to Below Brooks Drive
<br />Station 140+00 to 152+00 . . . . . . . . . .
<br />Ralston Creek From Below Brooks Drive to Above Lee Street -
<br />Station 152+00 to 202+00 ..,........... V" 1-5
<br />Ralston Creek from Above Lee Street to Below Oak Street - Station
<br />202+00 to 230+00 . , . , . . . . . . . . . . . . . . . .
<br />Ralston Creek from Below Oak Street to Below Simms Street -
<br />Stat ion 230+00 to 265+00 . . , ., ....,..,
<br />Ralston Creek from Below Simms Street to Xenon Street - Station
<br />265+00 to 303+00 ,.' . . . . . . . . . . , .. .... VIII-5
<br />Ralston Creek from Xenon Street to Indiana Street - Station 306+00
<br />to 384+00 ..,...........,.'......,. V 111-6
<br />Ralston Creek from Indiana Street to Quaker Street - Station 384+00
<br />to 444+00 '....'..., - . . . , . , .. .... V" 1-6
<br />Ralston Creek from Quaker Street roState Highway 93 - Station
<br />444+00 to 578+60,. ..',.",.......
<br />Leyden Creek Within the City Limits of Arvada - Station 0+00
<br />to 44+00. . . . . . . . . . . . . . . . , . . . , . . .
<br />Leyden Creek from the Arvada City Limits to Above Alkire Street
<br />Stat ion 44+00 to 92+00 ... , . . . , . . . . . . . , . , .
<br />Leyden Creek from Above Alkire Street to Below Leyden Lake -
<br />Stat ion 92+00 to 155+00 . . , . , . . , . , . . . . . .
<br />Leyden Creek at Leyden Lake - Station 155+00 to 195+00
<br />Leyden Creek from the Church Ditch to Above the Town of Leyden
<br />Station 195+00 to 230+00 .... ....
<br />Leyden Creek from Above the Town of Leyden to State Highway 93 -
<br />Stat ion 230+00 to 371+50 ..".,... . . . .
<br />
<br />Structures to be Removed from High Hazardous Floodway' .1-2
<br />Bridges to be Replaced or Improved for Impelementation
<br />of Master PI"n
<br />Summary of Cost Breakdown, Arvada and Jefferson County
<br />Ralston and Leyden Creeks.
<br />Upper Basin Parameters
<br />Lower (Urbanized) Basin Parameters
<br />Lower (Rural) Basin Parameters. .
<br />100-Year Peak Flow Summary Present Conditions
<br />100-Year Peak Flow Summary - Future Basin Conditions
<br />
<br />TABLE OF CONTENTS (Continued)
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<br />Page
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<br />1-1
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<br />1-2
<br />1-3
<br />1-4
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<br />I 1-1
<br />I I-I
<br />I I -I
<br />I I -I
<br />I 1- 2
<br />I 1-2
<br />I 1-2
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<br />" I - I
<br />111-]
<br />" I -I
<br />I I I-I
<br />II 1-2
<br />111-2
<br />II 1-5
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<br />IV-l
<br />IV-l
<br />I V-l
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<br />V-1
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<br />VI-l
<br />VI-I
<br />VI-l
<br />VI-3
<br />VI-3
<br />VI-3
<br />VI-3
<br />V 1- 3
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<br />SECTION IX - MASTER PLAN COST ESTIMATE
<br />
<br />SECTION X - MASTER PLAN DRAWINGS AND FLOODWAY TABLES
<br />Appendix to Section X
<br />
<br />LIST OF TABLES
<br />
<br />V II -1
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<br />Table 1-1
<br />Table !-2
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<br />V" 1- I
<br />V 111-1
<br />VI " -I
<br />VIII-3
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<br />Table 1-3
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<br />VIII-3
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<br />Table 11-1
<br />Table 11-2
<br />Table 11-3
<br />Table 111-1
<br />Table 111-2
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<br />VIII-3
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<br />Paqe
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<br />V 111-4
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<br />VIII-4
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<br />VIII-4
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<br />VIII-4
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<br />VIII-5
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<br />V 111-5
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<br />V I "-6
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<br />VIII-6
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<br />VIII-6
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<br />VIII-7
<br />VIII-7
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<br />VI I 1-7
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<br />VIII-7
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<br />I X-l
<br />X-l
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<br />. 1-3
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<br />1-4
<br />. 11-1
<br />. "-1
<br />'11-2
<br />'11 1-2
<br />'111-2
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<br />./
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