The level of Lake Roosevelt has already dropped to to a level not predicted until March, in a forecast put out in mid-January, 2015.

On Friday, Jan. 30, the lake surface was at about 1,276 feet above sea level, which will put out of reach several boat launches on the lake, but certainly not all. (See the list below).
The deepest access is offered at the Spring Canyon launch near Grand Coulee.

The U.S. Bureau of Reclamation, which operates Grand Coulee Dam, which controls the lake, had published an estimate of the lake level drop this year showing a flood control schedule that would have still held the level at full pool until the end of February and eventually dropping to about 1,243 in April, not as far down as in 2014. But factors including weather and power demand can be hard to predict.

MINIMUM BOAT LAUNCH ELEVATIONS
Crescent Bay 1265′
Spring Canyon 1222′
Keller Ferry 1229′
Hansen Harbor 1253′
Jones Bay 1266′
Lincoln Mill 1245′
Hawk Creek 1281′
Seven Bays 1227′
Fort Spokane 1247′
Porcupine Bay 1243′
Hunters Camp 1230′
Gifford 1249′
Daisy 1265′
Bradbury Beach 1251′
Kettle Falls 1234′
Marcus Island 1281′
Evans 1280′
North Gorge 1280′
Snag Cove 1277′
French Rocks 1265′
Napoleon Bridge 1280′
China Bend 1277′