I fail to see what this had to do with GWB, apart from the fact that you americans waste more energy hating him than working to replace him.
Facts, from the Truckee-Carlson Irrigation District:
The Truckee-Carson Irrigation District by contract with the United States took over the operation and maintenance of the Newlands Reclamation Project in January 1927. Since then, the District has been responsible for the operation and maintenance of the entire federal project which includes the dam at Lake Tahoe, Derby Dam, the Truckee Canal, Lahontan Dam and approximately 380 miles of canals and 345 miles of drains.
My guess is that they do the best they can, with the money they have, and neither will ever be enough to prevent all possible infrastructure failures.
But hey, why let facts or a little bit of basic research stand in the way of a good hate-on, right?