Those of us who look at the Grand Coulee Dam and think “how in the hell did they manage to build that?” will have the opportunity to have that question answered in detail by an engineering expert.

Raymond “Paul” Giroux will be making a free presentation on “Building Grand Coulee Dam,” Saturday, Aug. 25, at 6:30 p.m. at the Grand Coulee Dam Visitor Center.

The roughly hour-long pre...