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Wednesday, July 16, 2008

Another Dam Showing It's Stuff This Week

Water goes over the spillway of the new dam
for the first time at Lyman Lake this week

After 8 years of draining, demolition, reconstruction and filling, water is finally going over the new spillway at Lyman Lake.

The water began to trickle over the sides of the central "V" in the long labyrinth spillway Sunday afternoon, and that evening's rain gave the final push to send water cascading down the sidewalls into the pool and riffle ponds below. From there, the water rejoins Lyman Run, eventually going into the West Branch of Pine Creek to where it joins Pine Creek in the borough of Galeton.

Now when you stand at the spillway overlook, you can actually "hear" the water falling down the spillway. Its been a long wait to hear that sound again. The design of the spillway is such that it can carry almost three times the capacity of water that the old spillway carried. It also allows the water to be tumbled around which aerates the water, making it environmentally "healthier" as it continues downstream.

Lyman Run is a Class A trout water above the lake, but as the water spread out on the lake's surface, it heated up and allowed the oxygen it held in solution, to dissipate into the atmosphere. By the time the water returned to the run below the dam, the waters dropped to class C.

Now, with this new dam design, and the ability to add water from cold water release pipes located at the base of the spillway face wall, the quality of the water should vastly improve downstream.

This fall the bridge going over the spillway should be installed, allowing park maintenance personnel to drive over to the control tower. This bridge will also be open to pedestrian traffic allowing easy access to fishing off the breast of the dam.

All of the facilities are now open at Lyman Run State Park. Come and check out the new beach and swimming area. The snack bar is open too.

Cherry Springs State Park...Pennsylvania's First Dark Sky Preserve
...the place to be...for Astronomy!
See you under the Stars!!

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