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Project: City of Hughson Well #7 Replacement and Treatment - Construction Project

Description: The Well #7 Replacement Project will consist of constructing a new deep well. Currently, City wells yield water from shallow zones, starting at approximately 200? below ground surface. The replacement well will target deeper zones in the 400? to 900? range. Since there is a confining clay zone between 300? and 370?, surface contaminants will be reduced or eliminated. Construction of the deep well will ensure the City of Hughson has a long-term, reliable water supply that is not susceptible to surface contaminants. Since all existing City production wells are shallow, this project is vital to the City water supply program. Time is the essence as other wells could soon be lost to nitrate contamination, so constructing a replacement well is urgent. The project consists of (1) drilling a 900? exploratory well to identify deep water bearing zones and associated water quality (ensure exclusion of nitrates), and (2) constructing a deep well based on the exploratory well findings, and (3) site/mechanical improvements, as described below: (1) Exploratory Well: Like most municipal well projects, an exploratory well is required prior to production well construction. The exploratory well will be a special ?casing hammer? type well so accurate water quality samples can be obtained. This process will confirm that nitrates have not migrated below the confining clays and that other water quality parameters are acceptable. The exploratory well work is scheduled to proceed in August, 2012. Estimated construction cost: $100K.(2) Production Well: Using data from the exploratory well, construct a new deep production well. The well will consist of a 16? steel casing, shutter screen perforations at select water bearing zones, and 6? annular gravel envelop. At completion, the well will be developed and test pumped to design facility mechanical/electrical. Production well is scheduled for October, 2012. Estimated construction cost: $340K.(3) Site Improvements: Equip the deep well with pump/motor, mechanical appurtenances, electrical, hydro-pneumatic tank, building, access, etc. Site improvements are scheduled for Spring, 2013. Estimated construction cost: $725K.

Reference Number: 3940P01D1602057

Implemented By: City of Hughson

Objective: The project will solve the City health risk related to Arsenic MCL violation

Type: Infrastructure Improvement

Total Cost: $8,327,753.00

Project Status: Project Implementation

On Time?: Yes    Within Scope?: Yes    Within Budget?: Yes

Estimated Completion: 3/31/2023    Actual Completion:

Associated Counties: Stanislaus

Project Benefits a Disadvantaged Community (or SDAC): Yes

Contribution SourcesContribution DateContribution Amount
  $8,327,753.00
Other State Funds6/26/2017$3,327,753.00
Prop. 1, Water System Infrastructure Improvements - Safe Drinking Water6/26/2017$5,000,000.00


Project MetricMetric TopicQuantityUnit
Infrastructure ImprovementOther  

Water Action Plan Target

    
Provide Safe Water for All CommunitiesAction Description

Location

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