Why did it work for the last 16 years?
The irrigation supply lake for the Stadium is very small and not very deep. Because of the size limitations, the water always has a considerable amount of turbulence as the lake draws down and then fills back up (especially in the summer). Increased turbulence means that there are always addition screen clogging particles floating in the lake. Over time, the lake became more shallow, and the intake screen became closer to the bottom of the lake. What was once 2' of clearance between the screen and the bottom of the lake, was now only 6"! Combine the lack of clearance, increased water velocity due to the 10" attachment point and the aforementioned problem with turbulence in the water, the system was most likely stirring up the bottom and causing sediment to clog the intake screen.
We called in Logan Diving and Salvage to dredge the bottom around the intake pipe and to remove and replace the screen. They specialize in underwater construction. This was just a day at the office for these guys.
|Old Screen Coming Out of Irrigation Pond|
|Inside Old Screen (showing attachment point restriction)|
|New Screen with Pipe Extension Prior to Installation|