Washington Evening Journal
https://washington-ia.villagesoup.com/p/1668147

Fairfield Ledger   Mt. Pleasant News
Neighbors Growing Together | Aug 18, 2017

Council to vote on well cleansing

By David Hotle | Jul 11, 2017

 

During a special meeting at noon today in the Washington Public Library, the Washington City Council will vote on whether to spend $43,950 for a treatment to Well 6 that may or may not increase the flow of water through the well.

During the regular Washington City Council meeting on July 5, the council learned the yield of the well had dropped by about 50 percent, bringing in 300 gallons of water per minute instead of the usual 600. Washington city employees and workers from Fox Engineering discovered the problem with the newly recased well when they were testing the pump following the recasing project.

“We’re not exactly sure why the capacity of the well decreased,” Fox Engineering manager Rob Baker told the council.

The council will vote on the change order to add the procedure to the work being done on the well. While there was contingency money in with the project, the flush will exceed the contingency allowance by $39,107.

During the meeting, both Baker and Washington water superintendent Chad McCleary had recommended an acid flush of the lower section of the well. The flush will inject 8,000 gallons of muriatic acid into the uncased portion of the well with an injection pipe, air surge the acid for six hours, and remove the acid and solids by purge pumping the well. The procedure is done to

While Baker and McCleary said the procedure is standard maintenance for wells and removes solids and dirt build up from the bottom of the well. While both believe the process will improve flow, they do not believe it will return the water flow to 600 gallons per minute.

The well is about 2,000 feet deep into the Jordan Aquafir. Part of the project required workers to close off about 100 feet at the bottom of the well, but Baker did not believe this is the cause of the issue.

“The idea is that scale is currently blocking up part of the water bearing formation we draw from,” McCleary said. “Another idea is that since we put in a new casing, some of the old casing might have been leaking or maybe we were drawing more water from the bottom than we thought.”

McCleary said it is strange to lose that amount of water flow. He said the well had at unused much longer than it had during the project and that amount of flow had never been lost. He believes it is also unlikely that the well was drawing 300 gallons per minute of water from a crack in the casing.

“This is kind of our last ditch effort to see what we can do,” McCleary said. “If it works, wonderful. I wouldn’t get my hopes up that it willrestore the well to its previous levels.”

Washington has three wells that supply the city’s water. Well 6 had been taken offline in July 2015 after issues were discovered with the casing. It was temporarily recased and brought back into operation in March 2016 as a result of Well 7 being declared inoperative, as a means of supplying the water needed for the city.It was announced in August 2016 that all three wells were operational and that Well 6 had a pump and motor in it that were installed as a temporary measure.

The total amount the city paid to get the wells in service was over $500,000.

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