There’s yet another large piece of the local economy that PeaceHealth, in becoming the corporate parent of Southwest Washington Medical Center, has assumed control of: 75 acres of land just off Interstate 5 in Ridgefield that figures prominently in plans for growth in North Clark County.One development you can scratch off the list of possible uses for the land is Bellevue-based PeaceHealth’s planned headquarters. That site will harbor the nonprofit’s relocated corporate offices and some back-office employees from its other locations, eventually bringing 340 new jobs to the Vancouver area.Peter Adler, senior vice president and chief strategy officer for PeaceHealth, said the 75-acre parcel is not in the running.Nevertheless, Adler said, the Ridgefield site does have potential. It could become home to new clinical services, for example. A retail development to go along with some type of medical complex on the site is a possibility, too, Adler said. “It’s very strategically located,” he said.Southwest, which purchased the 75 acres from the Port of Ridgefield in 2007, has planned for the parcel to be developed into a medical campus. That’s not changing with PeaceHealth’s new role as the parent of Southwest, Adler said.If anything, the merger broadens what could be done with the land, said Ken Cole, spokesman for Southwest. That’s because the Ridgefield parcel is situated between two PeaceHealth hospitals — Vancouver’s Southwest and Longview’s St. John Medical Center.