Carly Fiorina and Scott Walker, there are already more than 1400 dams in California

Source:  KQED

If there is little to no rain and snow melt to collect, what's the point of building more?

Currently, California's reservoirs are at 47.94% capacity.

As quoted in Fiorina, Walker, and Cruz respond to Jerry Brown on climate change.  (Sacramento Bee, 8/15/2015)

Related reading:
California drought: Why doesn't California build big dams any more?  (San Jose Mercury-News, 8/14/2014)

1.  Best sites are already dammed.
2.  Stricter environmental laws (going back to President Nixon's signing of the Endangered Species Act in 1973)
3.  No more easy money.  (California Proposition 13 passed in 1978.  Federal funding for dams has dried up.  Which begs the follow-up question for Fiorina, Walker, and Cruz.  As President, will you support the funding of large-scale dam projects?)
4.  Conservation, new methods of water use

• groundwater storage
• wastewater recycling
• drip irrigation
• more efficient toilets

Despite their population growth, the cities of Los Angeles and San Jose use the same amount of water they did 30 years ago.