COTTAGE GROVE, Ore. - It's those dam gates again.
The 5th of 10 gates to pass through Oregon en route to a dam in California will cause delays Tuesday night on Interstate 5 between Cottage Grove and Sutherlin.
A similar gate was driven down I-5 last week.
Between 10:45 p.m. and midnight, northbound traffic may be delayed up to 45 minutes.
Southbound traffic will be delayed approximately 30 minutes.
Rolling slowdowns will be used in both directions, Oregon DOT said.
Motorists entering the freeway between Sutherlin (Exit 136) and Cottage Grove (Exit 174) should watch for flaggers at each interchange on-ramp.
When loaded onto a 142-foot long truck and trailer, the 23-foot-wide gate reaches into two travel lanes and can only be driven down I-5 at night when there is less traffic on the road, ODOT said.
The slowdowns are necessary because the dam gate will be passing through a construction zone south of Cottage Grove where the travel lanes are restricted to 19 feet in width.
Northbound traffic will be held while the gate is driven south at speeds of 20-30 mph through the seven-mile work zone.
The next 5 gates are expected to pass through Oregon by the end of summer.