FLOOD09052

• County: Routt
• County: Moffat
• Basin: Yampa/White
• Title: Dam Failure Floodplain Information for the Yampa River Downstream of Stagecoach Reservoir
• Date: 12/1/1989
• Prepared For: Moffat County / Routt County
• Prepared By: CWCB
• Floodplain - Doc Type: Flood Documentation Report

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LIST OF TABLES

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1. Yampa River Flood Hydrology................... 2
2. Valley Cross Section Input Data for DWR Model.. 20

3. Results of DWR Model .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .... 24

4. Stagecoach Dam Failure Analysis ............... 26
5.. Results of NWS Model .................................... '. .. .. .. .. .. .... 28

6. Comparison of Results for Flood Discharges .... 30

7. Comparison of Results for Flood Depths ........ 30

8. Flood Data for Emergency Action Plans ......... 31

LIST OF FIGURES

Unit Runoff vs Basin Area ..~...................... 3

Project Location Map ............................................................ 5

Profile Along Axis of (Stagecoach) Dam ............ 6

Stagecoach Dam .................................................. ~ .. .. .. .. .. .. .. .. .. .. 7

Area-Capacity Table ............................... 8

Area-Capaci ty Curves .......................................... ~ .. .. .. .. .. .. .. .. 8

Jet Flow Gate Discharge Rating Curve .............. 9

Lake Catamount Dam ................................11

Yampa River Profile ............................... 13

Valley Cross Sections ............................. 15

Reach Diagram No.1............................... 18

Reach Diagram No.. 2 .............................................................. 19

Inflow-Outflow Hydrographs for Lake Catamount ..... 22

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