The ferry that provides vehicle service across Lake Roosevelt north of Wilbur is returning to service today at noon after a leak was discovered last week. Martha S. had a pinhole leak in the hull and was moved to a dry dock facility at Grand Coulee Dam for repairs. A section of the hull was removed and a new steel plate was welded into place. The cost of the repair was less than $30,000. The Martha S. provides service 18 hours a day on a two-mile crossing of state Highway 21 that runs between Wilbur and Republic. Keller is just north of the reservoir along the Sanpoil River. The ferry has been running since 1948.