water to various communities in Dallas County. Under its September 1953 contract, Grapevine obtained of the water in the elevations between 500 and 535 feet (152 and 163 m) above sea level. In February 1981, the city obtained an additional in the same elevations "until such time as this [water] is needed for navigation purposes." In March 1953, the city of Dallas obtained of the water between 500 and 535 feet (152 and 163 m), and in March 1955, DCPC obtained at the same elevations. Recreation Parks and trails Numerous parks surround the lake. Some of the parks are owned, leased, or maintained by the local community. Others remain in the Corps of Engineers' control. The area contains 30 miles (50 km) of natural surface trails, including nature, biking, and equestrian trails. Trails listed by the Corps of Engineers include the 9-mile (14 km) Northshore trail, the 3-mile (5 km) Rocky Point trail, the 5-mile (8 km) Crosstimbers horse trail, and the 4-mile (6 km) Knob Hill trail. Camping The lake has primitive camping, prepared camping sites, and trailer/RV camping. Murrell Park currently has tent and primitive camping, but is undergoing an expansion to increase camping facilities. Meadowmere Park, managed by the city of Grapevine, offers primitive tent camping. Vineyards campground and cabins, managed by the city of Grapevine, offers RV camping sites, and cabins. Twin Coves Park is managed by the Town of Flower Mound and offers RV sites along with cabins and primitive camping. Marinas and boating Three marinas are located on the lake, all operated by the private company Marinas International. On the south shore, in Grapevine, are Scott's Landing and Silver Lake. On the north shore, in Flower Mound, is Twin Coves. The marinas support an active boating community on the lake; combined, the three marinas have around 1,400 moorings, with land-based storage for an additional 575 vessels. Both the Grapevine Sailing Club and the United States Coast Guard Auxiliary (Flotilla 5-11 of District 8) are based at Scott's Landing. Twelve boat ramps provide access to the lake, of which only the two ramps at Murrell Park are controlled by the Corps of Engineers and available for free. Of the remaining ramps: The City of Trophy Club operates Trophy Club Park (formerly Marshall Creek Park), which includes a fee-based ramp ($5 for boats on trailers, $1 for kayaks and canoes). The City of Grapevine operates public