WSP04853

• File Number: 8200.750
• Description: San Juan River General
• State: CO
• Basin: San Juan/Dolores
• Water Division: 7
• Date: 6/1/1987
• Author: Wheeler and Assoc
• Title: Documentation for La Plata River Hydrology Analysis - Historic and Virgin Flow Conditions - June 1986
• Water Supply Pro - Doc Type: Report/Study

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TABLE OF CONTENTS

Page

Summary .................................................................................. 1

USGS Records Used in the Analysis............................................ 3

Irrigated Areas. ............. ............ ........... ....................................................... ................ 4

Ditch Diversion Records........................ ..., ..............................,. 5

Historic Irrigation Depletion........................,..,.......................... 10

Description of River Segments Used in Hydrologic Analysis.......... 16
Calculation of Virgin Streamflow for La Plata River at Hesperus.. 18
Virgin Streamflow Calculations for La Plata River on Southern
U te Reservation....................................................................... 19

Comparison of Virgin and Historic Streamflow at Gage Near
Colorado-New Mexico State Line............................................... Z9

Appendix A - USGS Gage Record Summaries
Appendix B - Diversion Records
Appendix C - La Plata River Virgin Flows (Including Short-Term Runoff)
Appendix D - La Plata River Virgin Flows (Excluding Short-Term Runoff)

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