FLOOD07727

• County: Jefferson
• Community: Arvada
• Stream Name: Ralston/Leyden Creek
• Basin: South Platte
• Title: Major Drainageway Planning
• Date: 8/1/1977
• Prepared For: Arvada
• Prepared By: UDFCD
• Contract/PO #: &&
• Floodplain - Doc Type: Floodplain Report/Masterplan

Figure I I 1-1 100 Year Storm Hydrographs, Ralston Creek at Mouth
Figure 111-2 Ralston Creek-Leyden Creek Discharge Profile, 100
Year Storm Master Plan Channel
Rainfall, Depth-Duration-Frequency Graphs:
HA-l Ralston Creek, East Rainfall luncorrected for area)
HA-2 Ralston Creek, East Rainfall (Corrected for 91 sq.mi.)
HA-3 Ralston Creek, East Rainfall (Corrected for 30 sq.mi.)
HA-4 Ralston Creek, Central Rainfal I (Corrected for 91
sq.mi, )
Ralston Creek, Central Rainfall (Corrected for 48
sq.mi.)
Ralston Creek, West Rainfal I (Corrected for 91 sq. mi.)
Ralston Creek, West Rainfa'll (Corrected for 48 sq. mi.)

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Table HA-l

Table HA-2

Table HA-3

Table HA-4

Table HA-S

Table HA-6

Table HA-7

Table IV-I
Table IV-2

Table IV-3

Table V-I
Table VI-l
Table VI-2
Table VI-3
Table VI-4
Table VI-S

Table VI-6
Table VII-l

Table IX-l
Table IX-2
Table IX-3

HA-S

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HA-6
HA-7

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LIST OF TABLES (Continued)

Ralston Creek Watershed, East Rainfall - Inches
(Uncorrected for Area)
Ralston Creek Watershed, East Rainfall - Inches
(Corrected for 91 sq.mi.)
Ralston Creek Watershed, East Rainfall - Inches
(Corrected for 30 sq. mi.)
Ralston Creek Watershed, Central Rainfall - Inches
(Corrected for 91 sq,mi.)
Ralston Creek Watershed, Central Rainfall - Inches
(Corrected for 48 sq. m i ,) ,
Ralston Creek Watershed, West Rainfall - Inches
(Corrected for 91 sq. mi.)
Ralston Creek Watershed, West Rainfall - Inches
(Corrected for 48 sq. mi.)
Typical Structural and Furnishing Values
Ralston Creek, Flood Damage Probability Distribution
Future Basin Development with Existing Channel
Based on 1976 Values
Leyden Creek, Flood Damage Probabi] ity Distribution
Future Basin Development with Existing Channel,
Based on 1976 Values
Alternatives Investigated
Unit Prices (January 1975)
Phase A, Annual Unit Costs for Operation and Maintenance
Phase A, Probable Annual Damages, Ralston Creek
Phase A, Probable Annual Damages, Leyden Creek
Structures to be removed from lOa-Year Future Flood
Plain to Achieve Building-free Flood Plain
Nonstructural Strategy Costs '
Combination Alternative, Recommended by Consultant in
Phase A Report. .
Unit Prices (Apri 1, 1976) .
Arvada Cost Breakdown, Ralston & Leyden Creeks
Jefferson County Cost Breakdown, Ralston & Leyden Creeks

LI ST OF FIGURES

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