Rehabilitation of Municipal Well #9

1. Introduction

The City of Watertown Water Utility is requesting proposals from qualified municipal well contractors for the rehabilitation of Municipal Well #9. This project intends to restore well capacity, improve performance, and maintain compliance with Wisconsin Administrative Code NR 811 and NR 812.

1. Existing Well Information

Total Depth: Approximately 690 feet

Well Diameter: 20-inch

Pump Type: Vertical Turbine

Pump Capacity: Approximately 1,200 GPM

Motor: 100 HP, 460V, 3-Phase

Year Constructed: 2001

1. Scope of Work / Technical Requirements

• The contractor shall furnish all labor, materials, and equipment necessary to complete the rehabilitation of Well #9. Work shall include, but is not limited to, the following:
• Lock out and tag out all electrical service and remove the pump, motor, column pipe, shafting, and associated appurtenances.
• Inspect all removed equipment and provide a written report describing the condition of the motor, bowls, shafting, column pipe, bearings, and discharge head.
• Sound and televise the well to total depth (approximately 690 feet). Video shall be provided to the City.
• Perform mechanical rehabilitation of the well, including brushing and airburst/air shock treatment in the open borehole. Airburst shall be performed at a minimum of five blasts per foot unless otherwise approved.
• Bail and remove sediment and debris from the well to restore the original depth. Disposal of materials shall be the responsibility of the contractor and coordinated with the City.
• Provide and apply chemical treatment using NSF 60-approved products. Chemicals shall be introduced to the bottom of the well using a tremie pipe. The contractor shall agitate the well during treatment and allow sufficient contact time.
• Pump spent chemicals to a containment/neutralization system and neutralize before discharge. Disposal shall be coordinated with the City.
• Disinfect the well in accordance with NR 812.41(1) at a minimum.
• Televise the well after rehabilitation to confirm the effectiveness of the treatment.
• Reinstall the pump and all associated equipment. Tape wrap all column pipe joints and couplings. Replace worn components as necessary.
• Operate the well to waste until discharge is clear and chlorine residual is non-detectable.
• Perform a well yield test and record static water level, pumping level, and pumping rate.
• Coordinate bacteriological sampling. Two safe samples are required before placing the well back into service.
• Provide a final report summarizing the work performed and the before-and-after performance of the well.

Coordinate all required notifications and documentation with the Wisconsin DNR.

1. Proposal Requirements

Proposals shall include the following:

• Description of the company's experience with municipal well rehabilitation
• Description of the proposed approach and equipment
• Proposed schedule for completing the work
• Lump sum base price
• Unit pricing for additional items
• Proof of insurance
• At least three references for similar work completed within the last five years
• A project schedule that meets the required start and completion dates

1. Project Schedule

The contractor shall not begin work on this project before May 18, 2026.

All work shall be substantially completed by September 18, 2026.

The contractor shall coordinate the work with the Water Utility to minimize impacts on system operations.

Failure to meet the required completion date may result in assessment of liquidated damages as determined by the City.