La. 73 and River Road intersection closing intermittently La. 73 and River Road intersection closing intermittently River Parishes bureau Aug. 08, 2013 Comments GEISMAR — The intersection of La. 73 and River Road in Ascension Parish will be closed intermittently Thursday and Friday to allow a crane company, Mammoet, to move equipment, state highway officials said Tuesday. The intermittent closures on River Road, also known as La. 75, are expected to occur Thursday and Friday between 8 a.m. and 11 a.m. and again between 1 p.m. and 3 p.m., according to the state Department of Transportation and Development. Highway officials said drivers should take detour routes during the closures. Drivers headed north on La. 75 should take La. 73 to La. 30 to La. 3115. Drivers headed south on La. 75 should take La. 3115 to La. 30 to La. 73, DOTD officials said.