If California starts building a 130-mile segment of high-speed rail late this year as planned, it will enter into a risky race against a deadline set up under federal law.

The bullet train track through the Central Valley would cost $6 billion and have to be completed by September 2017, or else potentially lose some of its federal funding. It would mean spending as much as $3.5 million every calendar day, holidays and weekends included — the fastest rate of transportation construction known in U.S. history, according to industry and academic experts.

Over four years, the California High-Speed Rail Authority would need as many as 120 permits, mostly from a tangle of government regulatory agencies not known to rush their business. It would need to acquire about 1,100 parcels of land, many from powerful agriculture interests that have already threatened to sue. And it would need to assemble five teams of contractors with giant workforces positioned from Fresno to Bakersfield, moving millions of tons of gravel, steel rail and heavy equipment across the valley.

Even if the authority avoids any delays, its ability to complete the first construction section on time will require a breakneck pace of activity.

A hint for all of the Browndoggle supporters: your high speed rail project is probably a bad idea when even the LA Times has problems with it!