blt2ski wrote:
Vantage is not that steep, IIRC going west is in the 4-5% range. Being as it is an interstate, per federal road building guidelines, it can not be steeper than 6 with sort bursts to 8%. If you want as steep a climb on an interstate as you can get, drive the Road from Ellensburg to yakima. HWY 80?!?!? That is as steep as one can make an interstate hwy and get federal funding.
I pulled the west and east vantage grades at 52 mph with a blinken 6.5td at 15K lbs, 2000 over gcwr! and an overheater at that! so it could not be that steep etc! Granted it is long, ie 5-10 miles or so.
Now queen anne ave in parts of seattle.......one block I know of is 24.5%, that is a STEEP HILL! 5% is one of them, there was a hill back there?!?!?!?!?!?
marty
Marty, drove those hills many a time, worked for a grocery chain, and serviced Washing, Idaho, and Montana, plus oldest did four years at WSU, the drive from Puyallup covered the Vantage.
Never gave much thought to the East bound Vantage as the climb was short compared to the west climb which was 10.9 miles from the Columbia river to the rest area at Rye Grass Flats. Elevation at Vantage is 663' and 2,263' at Rye Grass, so you gain 1,600 feet over 10.9 miles which is only about a 3% grade, it is just constant for almost 11 miles.
Elensburg to Yakama is I82, and the first hill going both west and east are not much fun, sometimes better to take the old highway along the river!!
As for Lookout, it only averages 4.5% from Mullan, ID for the last 6.19 miles.