BOARD00550

• Board Meeting Date: 3/29/1999
• Description: WSP Section - Rio Grande Basin Issues - Rio Grande Decision Support System - Status Report
• Board Meetings - Doc Type: Memo

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STATE OF COLORADO

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Colorado Water Conservation Board
Department of Natural Resources
1313 Sherman Street
Denver, Colorado 80203
Phone: [phone],3441
FAX: [phone],4474

Bill Owens
Governor

MEMORANDUM

GregE. Walcher
Executive Director, DNR
Peter H. Evans
Director, CWeB

TO: Colorado Water Conservation Board Members

FROM: Randy Seaholm, Interstate Streams Investigations Section f(flK

DATE: March 24, 1999

SUBJECT: Agenda Item 20c, March 29-30, 1999, Board Meeting --
Rio Grande Basin Issues:
Rio Grande Decision Support System - Status Report

INTRODUCTION

The Board is in the first year of a three-year $4,960,000 effort to design and build the Rio Grande
Decision Support System. An expenditure of $2,000,000 was authOJ;ized for year 1 work. Six
contractors have been employed to do the development work during the year 1.

STATUS

The status of work under each of the contracts is as follows:

1. Groundwater (Contractor HRS Consulting)
HRS has selected the GMS visualization tool for use in the groundwater modeling effort. This
package has been tested and the summary memorandum required to document completion of
Task 1 submitted. Work on Task 2 has been initiated and the State's San Luis Valley
Groundwater Model (SL V -GWM) provided to HRS. The A WDI transcripts have been reviewed
and a summary memorandum of the technical issues prepared. A review of the SL W-GWM has
begun. Work on the Task S-Sensitivity Analysis and Task 7-Hydrogeologic Data Review and
Database Development has also begun.

2, Groundwater (uSGS Joint Funding Agreement)
The USGS is geophysically logging the existing confmed aquifer observation well network
under this agreement. Also, the USGS has been asked to look at enhancements to the
MODFLOW groundwater model and a preliminary Scope-of-Work for this task has been
provided.