WSP12268

• File Number: 8509
• Description: San Luis Valley
• State: CO
• Basin: Rio Grande
• Water Division: 3
• Date: 6/1/1987
• Title: Interim Task 5 Report Deep Well Testing & field Investigation - San Luis Valley Confined Aquifer Study - Phase 1
• Water Supply Pro - Doc Type: Report/Study

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1.0 INTRODUCTION

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c-) As part of the Phase IB studies for the San Luis Valley Confined Aquifer
Study, the study team of HRS Water Consultants, Inc., and Robert Moran, has
performed analyses of selected data sets from the San Luis Valley. These data
sets analyzed were part of several earlier (Phase IA) investigations for the
Confined Aquifer Study, The analyses performed were as follows:
1. Analysis of deep-well aquifer test data
2. Analysis of deep-well geophysical logs
3. Analysis of satellite imagery of the Valley

The aquifer test data analyzed were acquired during the summer of 1986 as
part of the Phase lA, Task 5 activities. Three deep confined aquifer wells
(the Hooper Pool Well, the Carroll Well, and the Owens Well) were tested at
that time. The Owens Well did not yield usable data, due to background noise
problems with constant use of the well. The Carroll Well and the Hooper Pool
Well yielded transmissivity estimates on the confined aquifer, but, due to
well construction, it is felt that the estimates are more representitive of
HSU-2 than of HSU-3.

Geophysical logs were run in the Hooper Pool Well, the Carroll Well, and
the Alamosa Geothermal Well. The logging probes could not penetrate below a
depth of about 280 feet in the Hooper Pool Well, due to the condition of the
well. The Carroll Well and the Alamosa Geothermal Well both were logged to
their total depths (2620 feet and 6075 feet, respectively). Both wells yielded
logs which have been useful in determining the hydrologic, lithologic, and
thermal properties of the confined aquifer.

Also included in this report is an interpretation of geological and
geophysical data from a new oil test well, No. 1-19 San Francisco Creek,
located about five miles south of Del Norte, The data from this new test well
were obtained through a data exchange agreement between the Colorado Water
Resources and Power Development Authority (through HRS Water Consultants,
Inc.) and Waggoner-Baldridge Energy Co. of Dallas, Texas.

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