WSP11979

• File Number: 8200.766
• Description: Gunnison River - Gunnison River Basin Planning Model
• State: CO
• Basin: Gunnison
• Water Division: 4
• Date: 8/1/1996
• Author: BOR
• Title: East River Water Supply and Water Quality Study - Final Report
• Water Supply Pro - Doc Type: Report/Study

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EAST RIVER WATER SUPPLY & WATER QUALITY STUDY

Table of Contents

Page No.

STUDY BACKGROUND ........................................ i

CHAPTER 1 - Gather Existing Information .......................... 1

INTRODVCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SUMMARY OF INFORMATION GATHERED ..................,... 2

Surface Water .................................... 2
Describe existing facilities . . , . . . . . . . . . , .. ........ 2
Obtain streamflow records ....................... 3
Provide water rights tabulation. . . . . . . . . . . . . . . . . . . . . 4
Obtain SCS aerial photos & soil interpretation .,.....,.. 4
Describe present/future water allocation
and administration practices . . . . . . . . . . . . . . . . . . 4
Identify NPDES discharge permits . . . . . . . . . . . . . . . . . . . 5
Obtain existing information on non-point sources ...,. , . . 6
Obtain WQ data/studies .............,........... 7
Obtain standards for stream waste water loadings ....,. 34
Obtain WQ standards from EPA/CWQCC . . . . . . . . . . . ., 34
Obtain Water Supply Studies , . . . . . . . . . . . . . . . . . . . . 34

Groundwater .......,............................ 37
Identify all well permits . . , . . . . , . . . . . . , . . . . . . , . .. 37
Obtain geology & aquifer studies .,................ 37
Obtain West Slope Aquifer Study . . . . . . . . . . . . . . . . .. 38
Obtain groundwater quality studies. . . . . . . . . . . . . . . .. 38
Identify all septic tank permits . . . . . . . . . , . . . . . . . . .. 38
Natural Systems . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . ., 39

Water Usage ..................................., 45
Describe existing population ..................... 45
Obtain historical diversion records ................. 45
Estimate existing use (diversion & CU) by type of use . . .. 46
Describe use for instream, wildlife
& recreational purposes . . . . . . , . . . . . . . . . . . . . 46

CHAPTER 2 - Define Water Supply and Water Quality Needs ............ 47
INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , .. 47
DESCRIPTION OF STUDY AREA AND WATER USE. . . . . . , . . . . . . . , 49

General .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 49