Last month I posted a few photos and text after a hike down the west side of Billy Clapp Lake.
As I walked the west side in October, I was looking through binoculars at some of the flood features above the east shore and decided that I'd need to get a closer look. Saturday I noticed that Accuweather had a sunball symbol on Sunday ... So off I went (I wish I'd have looked at the numbers they had next to the sunball). When I started hiking it was 18 degrees ... Gloves and a warmer coat would have been nice.
The approach I took is described by State Fish & Wildlife as: "A primitive parking area on the east side of the Billy Clapp Reservoir that is about two miles from the west end of county Road 26 NE off of county Road Q NE."
I was surprised at the number of deer, ducks and geese I saw during my hike. The State doesn't seem to think much of the area as a refuge. Paragraph below from Washington State Department of Fish and Wildlife site. The two-page ownership map it provides is pretty good. - See link below.
Columbia Basin Wildlife Area
The Billy Clapp Lake unit is 4,000 acres along what was originally called Long Lake Reservoir but renamed in honor of one of the originators of the Columbia Basin Irrigation Project. The natural coulee was dammed on the lower south end (Pinto Dam) to create the reservoir. Water cascades into the upper end of the reservoir from the Main Canal creating Summer Falls. Basalt cliffs of varying heights encompass the reservoir. Most of the shoreline is too steep and rocky to support wetland or riparian vegetation, and the uplands are a mix of poor quality gravelly soils and basalt outcroppings. Vegetation varies from the fire-caused cheatgrass or bunchgrass communities to native woody shrubs on talus slopes. BOR maintains public parking, and boat launching is available on the north end of the lake. The Stratford Game Reserve encompasses nearly all the public land in this unit. Originally designated to provide a resting area for migrating waterfowl each fall, public use and changing migration patterns have made the Game Reserve less effective.
From the Grand Coulee
THREE ICE AGE FLOOD CHANNELS
Not all of the Grand Coulee flow entered the Quincy Basin via Lower Grand Coulee. Water that escaped the Grand Coulee cut channels around High Hill and Pinto Ridge. These channels carried substantial flows and became known as Dry Coulee and Spring Coulee (The reservoir created in Spring Coulee is today named Billy Clapp Lake). Floodwaters flowing through Spring Coulee fed into the Crab Creek channel prior to entering the Quincy Basin.
As stated in the October post - J Harlen Bretz called Spring Coulee:
"A fine scabland canyon with castle-like buttes, lateral subsidiary canyons, and cataracts notching its walls"
Between 1946 and 1948 the Bureau of Reclamation constructed Pinto Dam at the south end of Spring Coulee. The Coulee is one of many Ice Age Flood features used by the Bureau as part of the Columbia Basin Irrigation Project.
It was pretty cool to take a few minutes and think about the surveyors walking the Ice Age Floods region in the 1930s. In his book "Grand Coulee Harnessing a Dream"- Paul C. Pitzer describes the surveyors searching the channeled scablands of eastern Washington for potential storage reservoirs, dam sites and canal routes.
The features I was most interested in on this side of the coulee were several potholes and a group of "Drumheller" type channels just east of the potholes.
The potholes were formed during the Glacial Lake Missoula flood events that swept over eastern Washington as recently as 15,000 years ago. Powerful whirlpools (sometimes referred to as underwater tornados) known as kolks, scoured out these holes.
WIKIPEDIA DEFINES KOLK: (also known as colc) is an underwater vortex that is created when rapidly rushing water passes an underwater obstacle in boundary areas of high shear. High velocity gradients produce a violently rotating column of water, similar to a tornado. Kolks are capable of plucking multi-ton blocks of rock and transporting them in suspension for some thousands of meters.
In his book "On the Trail of the Ice Age Floods", Geologist Bruce Bjornstad explains the creation of Rock Basins and Potholes: "Fast-moving floodwaters passing through scabland channels further gouged into the basalt, scouring out rock basins and augering deep holes into basalt. Like a powerful vacuum cleaner, floodwaters actually sucked up all the loose material off the land surface, including huge columns of basalt, taking advantage of any weakness in the rock, such as fractures."
To view image of pothole #4, you'll need to open the October post and scroll down to the pothole image.
The picture doesn't do this pothole justice. This is one fine pothole! I'll return in the spring and try to get a better shot as the scale just doesn't show here.
During our lunch stop on the October trip, we noticed a "hanging pothole" on the other side of the coulee. Erosion of the main channel has opened up one side of the pothole. Future megafloods will finish the job and remove all traces of this pothole before going after potholes #1 and #2.
These smaller kolk carved basins seem popular with the local wildlife. Game trails lead to each of them.
I'll embed a Google Map at the bottom of this post. If you switch the map from Terrain (TER) to Satellite (SAT) and zoom in, you'll be able to search the area and find many more potholes on the bench east of Billy Clapp Lake.
Google Earth image shows Giant Current Ripples above Billy Clapp Lake
For scale you can open the October post where I posted an image of Bruce Bjornstad standing on one of the ripples shown in this shot. The mix of farmland, ripples and a massive flood channel remind me of a similar spot closer to home ... see photos below.
Note farmer on tractor at top left.
Same shot but a little wider angle. Huge flood bar being removed at coulee floor. If you look to the right of the quarry there seems to be one ripple mark left.
Another set of Washtucna Coulee giant current ripples 
Borrow pit in ripple-covered flood bar exposes layer of windblown loess deposited since the Ice Age Floods.
South of the coulee along Highway 28 a historical marker gives a brief history of the area:
Indians camped along Crab Creek in Stratford to gather roots and other food. The main Indian trail came past Stratford across the creek. The Indian trail branched here & one went past Pinto Dam. LT Symons came past here while laying out military wagon road from FT Walla Walla to Camp Chelan in 1879. Old wagon road from Waterville to Ritzville came past here in 1888. Railroad built in 1892. Early apple orchards were irrigated from Brook Lake in late 1890's. Pumphouse still standing. Stratford platted in 1903. Crab Lake drained by local pioneers in 1909 for farming purposes.
