Encountered this turtle laying her eggs on a sand dike constructed by the irrigation company.
I borrowed four eggs, the white ones, and attempted to hatch them at home. The other four I found indiscriminately lying on a sandbar. Could have been a young or confused turtle. The plastic bowl contained water to keep the atmosphere moist. 
Eighty-five days later they hatched, coming out of their shells as curled up as burrito tortillas. 