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Sat, Dec. 07

Prescott Valley's test wells 'wildly exceeding' hopes

PRESCOTT VALLEY – It looks like the town's drilling of six exploratory wells on the Point Of Rocks and Granite Dells Ranch will not be in vain.

At the Feb. 19 work study session, Public Works Director Larry Tarkowski told Town Council members that the wells, which are a part of the North Well Field Project, were "wildly exceeding the original expecta-tions."

On Wednesday, Tarkowski said that drilling is complete on three wells, and one of them has a water yield of 1,000 gallons per minute (gpm). The expected yield for the wells was 500 gpm.

Tarkowski said it appears that the third hole, which they haven't tested yet, will have a yield similar to 1,000 gpm. Also, he said, that the town's most substantial discovery is that they found about 100 to 200 feet of volcanic formation.

Tarkowski, who said that he expected some volcanic layers, called the discovery "a very pleasant surprise." In this region, he said, volcanic layers are usually the most prolific zones for water.

These wells are for study purposes only. Tarkowski said that a permanent well on the property would run at about 700 gpm to "treat the aquifer gently."

The fourth well should be complete within two weeks.

The Prescott Valley Water District Board will consider authorizing today, a contract for $1.2 million to design and construct permanent wells on the ranches, as the North Well Field. The wells will connect with the Northern Water Distribution Main project currently under construction.

The ranches are in three municipalities and their acreage in the Prescott Valley town limits totals 3,500 acres, or 5.5 square miles. The town previously awarded a $1 million contract to install permanent easement for water lines on the ranches.

The town will run pipelines from the ranches to the subdivisions of Pronghorn and Viewpoint to give the developments redundancy in their water supply.

Contact the reporter at nluedeker@prescottaz.com

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