Plans to install a boat launch, a parking lot and six camping sites at Marconi Cove in Marshall have been postponed due to uncertainties around the cost of developing the site, said Roy McNamee, a recreation specialist at the Marin office of California State Parks. In 2011, the project for Marconi—which was a marina until the 1970s—nabbed $266,000 in funding from Caltrans. That year, Caltrans applied for a coastal development permit to install 230 cubic yards of rock along Highway 1, near the Miwok cemetery, to stop the roadway from eroding; the coastal commission, which promotes public access to the coast, mandated the funds for Marconi, which is part of Tomales Bay State Park, as mitigation for approving the permit. (California Boating and Waterways, a division of state parks, also promised funds.) Caltrans finished the erosion project late last year, but for Marconi, there are still “lots of undetermined costs,” Mr. McNamee said. One of the main problems is a blind curve just north of Marconi Cove, where the parks department needs to ensure that cars can safely enter and exit the site. Developing the five acres at Marconi might require a realignment of Highway 1, which would be expensive. State parks would like Caltrans to provide input before it begins designing so they can “plan most efficiently,” but Mr. McNamee said that Caltrans does not want to provide any comments without a specific project in hand to evaluate. “It’s a chicken and egg scenario,” he explained. “The bottom line is, how much of a highway improvement project will make that an appropriate entrance and exit? We don’t know.” He believes the project will happen at some point, but it is likely many years down the line. In the meantime, the parks department would like to redirect the $266,000 in Caltrans mitigation funds to disability access improvements at Millerton Point, a project estimated to cost about $650,000 and scheduled for completion by 2018. Those improvements include widening a loop trail (which will be rerouted a bit farther inland), A.D.A.-accessible toilets and two A.D.A. parking spaces. But shifting the funds requires approval from Caltrans and the coastal commission. Will they greenlight the change? “We haven’t made a final determination on whether we can achieve that or not,” Mr. McNamee said.