Members of the Rivermont community can be proud that they helped Johns Creek become the second city in Georgia and the first in North Fulton to receive Wildlife Habitat Certification from the National Wildlife Federation. They'll mark the occasion on Saturday at 10 a.m. with a ceremony at their Barnwell Road neighborhood park, which will receive a bronze sign from the NWF for becoming an official wildlife habitat.  The 27-acre park sits along the Chattahoochee River with its walking trails connecting to the Chattahoochee River National Recreation Area on Barnwell. "To keep up community spirit…