Gila Box Riparian National Conservation Area (RNCA) Management Plan, Environmental Assessment (EA) and Decision Record, BLM Safford Field Office, 1998. The BLM’s Johnny Creek Bonita Creek, Bull Gap, Turtle Mountain, Twin C, County Line, Smuggler, Zorilla, Gila, and Morenci grazing allotments are located wholly or partially within the RNCA.