All public work requires a contract time, typically set by the design professional. The Contract Agreement usually restates the construction time and references a schedule of Liquidated damages on a per day basis. The daily penalty is based on the amount of the construction contract.
I suspect that this contractor is seriously late and is into liquidated damages. Should the penalty get to a point that makes his profit zero or less, he could decide to default. (that is walk off the job). This would put the contract in the hands of the Bonding Company. Typically when this happens It takes about 6 weeks to three months for construction to start again. The bonding company has to finish the job at the contract price (plus or minus and change orders). I hope that the Bonding company for this job is strong.
All public work REQUIRES a Performance Bond (guarantee of completion of the project for the price bid) and a Payment Bond (Guarantee of payment of all bills for material, services and labor, this insures that the owner gets a lien free project).
I hope this contractor does not default on this project as that would result in the entire season without a stadium.