Motorists traveling to the Olympic peninsula will have to endure one-boat service for two days next week.

The Chetzemoka will be drydocked Tuesday, Aug. 23, through Thursday, Aug. 25, so workers can make permanent repairs to a problem on the new 64-car ferry, which started service late late year, according to information from Washington State Ferries.

The Chetzemoka was pulled from service for two days in early August after engineers discovered a leak in the vessel’s keel cooler. The keel cooler circulates fresh water from the diesel engines through tubes that help cool the Chetzeomka’s service generator.

The U.S. Coast Guard approved a temporary repair  which allowed the ferry to return to service until a permanent fix could be arranged.

Marta Coursey, spokeswoman for Washington State Ferries, said the Chetzemoka will be drydocked at Dakota Creek Industries in Anacortes. She didn’t have information about the costs, saying numbers won’t be available until the full extent of the repairs are known.

The repairs will leave only one ferry, the Salish,  to serve the Port Townsend-to-Coupeville route.

Ferry officials recommend customers make reservations on the popular tourist route.

The Chetzemoka is scheduled to return to service Friday, Aug. 26.