"One bogey out of three days is not a bad thing," Salas said.
Dori Carter, the second-round leader after a course-record 64, had a 74 to drop into a tie for third at 8 under with Thailand winner Anna Nordqvist, Ayako Uehara and Shanshan Feng.
"Overall I handled my nerves pretty well," Carter said. "It was my first time playing in the final group."
Nordqvist and Uehara shot 67, and Feng had a 69.
"I started off really solid," Nordqvist said. "I think the back nine is playing a little tougher, but I hung tough and made a silly mistake on 16. But other than that, I'm really happy with my round."
Third-ranked Stacy Lewis was 7 under after a 73. She had two late bogeys.
DIVOTS: One of the tournament's most bizarre shots came Saturday from Yani Tseng on the par 4 No. 18. Tseng sprayed her approach shot left, deep into the bleacher hugging the green. The ball ricocheted around and spit out, landing on the green where Tseng, the 2012 winner, pared the hole. ... Michelle Wie and 16-year-old Lydia Ko were in a group tied for 28th at 3 under. Wie had a 70, and Ko shot 71.