McNary and Ice Harbor dams’ navigation locks will be closed to all river traffic Sept. 9, between 6:30 a.m. and 5 p.m.
The locks will conduct downstream gate inspections during the 10-hour outage. McNary will conduct an underwater inspection for the lower half of the miter gate. Ice Harbor will conduct an inspection of the downstream gate sheave drum bearings.
Recreational boaters can access the Columbia River both downstream and upstream of McNary Lock and Dam from nearby boat launches. The nearest fee-free launch available on the south shoreline of the river is the Oregon Boat Launch located just upstream of the dam. The nearest free boat launches on the north side of the river are the Washington Boat Ramp, located just upstream of the dam, and at Plymouth Park, operated by the Corps’ Portland District, located just downstream of the Interstate 82\U.S. Highway 395 bridge over the Columbia River.
