State lawmakers are wading into a conflict over a massive fence between the billionaire owner of a historic ranch property and local communities in southern Colorado. Lawmakers last week introduced a bill that requires local government approval of large fencing projects on Sangre de Cristo land grant properties. The bill aims to halt further expansion of a controversial 8-foot-tall fence topped with barbed wire that the owner of Cielo Vista Ranch is building in the San Luis Valley. The construction of the fence — which locals estimate spans at least 20 miles of the ranch’s border — enraged some locals.