Indybay: Bay Delta Conservation Plan's Actual Cost: $54.1 billion
Restore the Delta has recently found that it would cost $54.1 billion to build the BDCP's Twin Tunnels, instead of the $24.5 billion that the Brown administration claimed it would cost. Restore the Delta found this $54.1 billion price tag from individual costs in BDCP documents of construction, operation and maintenance, interest on tunnel revenue bonds, and habitat restoration among others. You can read about Restore the Delta's findings and the whole cost breakdown here.