Culver City has spent the past decade beefing up its commercial peninsula along Washington Boulevard, and that trend continues with yet another mixed-use development on the way.  According to plans filed late last month, a 97-unit apartment building with 15,000 square feet of ground floor commercial space is proposed at 11925 Louise Avenue.  The five-story building would front the intersection of Washington and Inglewood Boulevards, rising on property that is split between the boundaries of Los Angeles and Culver City.  That should make for an especially complicated approvals process.  Just across the street, a smaller mixed-use project from the Canadian-based Bastion Development Corporation is under construction.  The four-story, 30-unit building known as Olive broke ground in September, joining two other mixed-use developments from Bastion which opened last year.  A short jog to the west, the two lots on the north side of Washington and Centinela Avenue remain empty.  They are eventually slated to give way for the Westside's answer to Downtown's Grand Central Market.  On the bright side, the vacant parcels are still an excellent place to pick up a Christmas tree come December.