City Commissioners approved a $256,000 contract amendment with TD&H Engineering for a water treatment plant project during their June 3 meeting.

Commissioners initially approved the contract in June 2024 for the water treatment plant head house and rapid mix vault project.

The original contract tasked TD&H to conduct a condition assessment of the head house, complete the project design, develop plan set, and assemble a bid package for the proposed critical improvements.

City approves water treatment plant improvement contract

The amendment adds State Revolving Fund loan application services, mechanical services for a circulation pump relocation, analysis of the 1916 filter building roof trusses, main floor grating evaluation and design, and construction inspection services, according to city staff.

The project is scheduled to bid in August with work beginning late fall.

The head house, part of the original 1916 water plant, receiving raw water from the Missouri River.

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During routine maintenance, staff discovered severe deterioration in the head house’s concrete floor, posing a risk of major service disruption and potential injury, according to the city.

A December 2023 TD&H inspection revealed widespread structural issues, including spalling, significant cracking, and exposed, corroding rebar in the elevated slab and walls of the settled water flume and rapid mixer.

The overall project will provide plan and bid document preparation for the 1916 head house building including repairs on the rapid mix slab main floor and lower level, as well as truss work for the 1916 filter building.

The project was selected and prioritized under the city’s public works capital improvement plan and budgeted in the water enterprise fund.

The original contract was $178,000 and the amendment adds $265,000, bringing the total to $434,000.

Jenn Rowell

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