I was googling the "Flatland 1200K," trying to find this ride we talked about several years ago in Holland. I didn't find it, but I did find a ride report from the Gold Rush -- must have been 2009 -- from a Dutch cyclist. He began by describing the ride up and over the dam:
The ride started out flat, with about the only hill being to get up onto a levee. Just like Holland. There was a slight wind and I found myself shuffling behind stronger riders to find a windshield. The levee reminded me of American Pie by Don McClean. "took my chevy to the levee" - now I understand what he mean't. All these years I thought a levee was a petrol(gas) station.