An out-of-season outage will close The Dalles Dam’s navigation lock this coming Tuesday and Wednesday.  The U.S. Army Corps of Engineers says a specialized rope-access, or climbing, inspection team will be performing an assessment, which is part of a required five-year cycle.  The Corps has a requirement to periodically and thoroughly inspect all hydraulic steel structures to ensure they are still safe to work behind.  The Corps says this outage is separate from the miter gate issue discovered during the annual lock outage and unanticipated extension in March 2021.  Portland District engineers plan to leverage any information gained from this inspection to better inform and optimize the repairs to be done in next year’s planned outage.