Strange formation spotted in Lake Hefner

LakeHefner-Paul Audet - Strange formation2

A hobbyist, flying a radio control camera airplane, went flying over Lake Hefner this last weekend and snapped a few pictures. The pictures show some type of formation near the shoreline. It appears to be visible now due to the low lake levels.

Photo by Paul Audet

Photo by Paul Audet

Photo by Paul Audet

Enhanced and cropped photo by Paul Audet
What is it? Does it resemble a man-made structure? Does it kind of look like a thunderbird symbol? What do you think?

A viewer pointed out that it can also be seen on Google Maps here

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