Roadwork will close the city's lone boat ramp north of the Bowersock Dam for two weeks.
The ramp will close Monday and reopen by Oct. 13, said Tom Wilkerson, the city's assistant director of parks and recreation.
During that time, crews from LRM Industries will repave an access road to the ramp from the intersection of U.S. Highway 24, 40 and 59, at Teepee Junction.
Crews also will build a new 12,800-square-foot parking lot to the south, adding spaces for trailers and pickups to park overnight while visitors canoe and fish along the river.
The closing could be reduced by fair weather, Wilkerson said, but officials are asking recreational users to be patient.
"It's going to be better the next time they come back to use it," he said.
The remaining 994 acres of Riverfront Park will not be affected by the ramp closing, Wilkerson said. Boaters may still use the city's other boat ramp, at Eighth and Oak streets, for access to the river south of the dam.
The project will cost $29,000.