The settlement exposes a weakness in major public infrastructure projects: once a city becomes dependent on finishing the work, its bargaining power changes.

Houston will pay $24 million to settle a four-year legal fight with the contractors expanding its Northeast Water Purification Plant, ending a dispute over construction costs that had become difficult to separate from the city’s need to finish the project. Isaac Yu of the Houston Chronicle reported Thursday that City Council unanimously approved the agreement with Houston Waterworks Team, roughly halving the $46 million the city had withheld after the contractor sued in 2022. Another $6 million depends on completion of unfinished work.

The city had good reason to contest the money. It had an even stronger reason to keep the project moving. The plant currently produces about 80 million gallons of drinking water a day, and the expansion is designed to increase that capacity to 320 million gallons a day. Houston and surrounding water systems need the additional supply as the region reduces its dependence on groundwater and meets state water-management requirements.

Large infrastructure contracts look different once construction is far enough along that neither side can easily walk away. Before work begins, a city can solicit bids, negotiate terms and choose among contractors. Once a specialized facility is partly built, replacing the team can introduce new delays, new costs and another round of technical risk. The contractor still depends on public payment, but the public agency now depends on the contractor finishing what it started.

Houston’s dispute eventually reached that stage. Houston Waterworks Team argued that the city should cover unexpected costs, including sharp increases in the price of roughly 4 million pounds of steel. City attorneys accused the contractors of breaching their agreement and warned in a countersuit that Houston faced “imminent, irreparable harm” if construction stopped. The legal fight became another cost attached to a project the city could not afford to abandon.

The city and participating water authorities ultimately spent $8.7 million on outside legal fees. None of that money increased treatment capacity or brought the plant closer to producing another gallon of water. It paid for determining who would carry expenses that neither side believed belonged to them.

Contract disputes are common in major public works, particularly when material prices move sharply or schedules stretch beyond their original assumptions. The public side faces a different constraint because essential services continue regardless of what happens in court. Houston could reject invoices and challenge the contractors’ claims, but it could not decide that additional drinking-water capacity was no longer necessary.

That constraint gradually moved leverage toward the builder. Houston began as the customer controlling the contract and public money. As the deadline passed and the unfinished plant became more valuable to the region, the contractor gained bargaining power from the cost of delay itself. Mayor John Whitmire described the agreement as a compromise, and the city did negotiate the payment well below the amount it had withheld. The settlement still reflects how much Houston needed the work to continue.

Residents carry the consequences when this kind of risk is misjudged because the service cannot be cancelled along with the contract. Water demand keeps increasing. State requirements remain in force. Construction delays require money, management attention and sometimes litigation long after the original budget has stopped reflecting the project’s real cost.

Houston’s experience puts more pressure on the contracts cities sign before a shovel reaches the ground. Long construction timelines make inflation, supply shocks and material-price swings foreseeable risks even when their exact size cannot be predicted. If those costs are not assigned clearly at the beginning, the parties may end up negotiating them later when the city has much less freedom to say no.

The next infrastructure dispute will probably be decided partly by lessons from projects like this one. Cities that want to preserve bargaining power will have to write contracts for the moment when completion becomes essential, not merely for the moment when construction begins.