responsible for repaying any debt if toll revenues fall short. Future Proposed extension SR 241 was planned to extend from its current southern terminus at Oso Parkway south to I-5 at the San Diego County border near San Onofre. This southern extension, known as Foothill-South, was intended to be the final piece in Orange County's planned network of public toll roads. The extension would have provided an alternate route from SR 91 to I-5 for those traveling from Riverside County and through southeast Orange County, south to San Diego County. Proponents of the project included a coalition of chambers of commerce, who argued it would provide greater access for communities such as Foothill Ranch, Rancho Santa Margarita, Las Flores, Coto de Caza, Wagon Wheel and Rancho Mission Viejo. Transportation Corridor Agencies (TCA) originally projected that traffic would increase 60 percent by 2025, and estimated that Foothill-South would alleviate traffic on I-5 by 2.6 to 8 percent. The proposed route was selected by a collaborative group that included the Federal Highway Administration, Environmental Protection Agency, Fish & Wildlife Service, the Army Corps of Engineers and Caltrans. Initially, the plan would have placed the final of the roadway on Camp Pendleton Marine Base, as well as through a section of San Onofre State Beach, which is leased from the United States Marine Corps. The Marine Corps reserved the right to grant easements for rights of way when the lease with the California Department of Parks and Recreation was signed in 1971. Eventually, spokespeople from Camp Pendleton would deny permission to build the road on the base but approved the road's construction through the portion of the base that hosts the state park. The TCA Board of Directors, local elected officials who represent the areas adjacent to the toll road routes, certified the project's Environmental Impact Report in 2006. Many conservationists, environmental groups, and some residents of San Clemente opposed the extension to San Onofre State Beach. Former California Attorney General Bill Lockyer filed two lawsuits in 2006, one on behalf of the Native American Heritage Commission. A third lawsuit was filed by a coalition of several groups, including Sierra Club, the Surfrider Foundation, Natural Resources Defense Council. It was later revealed that the TCA funded a study in support of removing the California gnatcatcher from the federal Endangered Species list, which would have made it easier to build the toll road extension.