(News10) - No-bid contracts cost taxpayers big money, and that's one reason the $79 million Napa Valley Wine Train flood-control project has become a "tax dollar sinkhole," two U.S. senators say. In a statement issued Tuesday in response to a California Watch report, Sens. John McCain, R-Ariz., and Tom Coburn, R-Okla., faulted the U.S. Army Corps of Engineers for not seeking competitive bids on the Wine Train job. The project involves relocating a rail bridge for the Wine Train tourist attraction as part of construction to stop serious winter flooding on the Napa River.