Submitted by Peter Narsavage on Sun, 03/29/2009 - 2:38pm
The Mahoning Valley Sanitary District Emergency Spillway and Inflatable Dam, 1996
Owner: Mahoning Valley Sanitary District (MVSD)
Location: Mineral Ridge, Youngstown, Mahoning County
Nominated by: Thomas F. Mosure, P.E., P.S., ms consultants, inc.
Description: The Meander Reservoir, the sole water supply for Youngstown and Niles, is impounded by a 55 foot high, 3,400 foot long, earth embankment. The dam required upgrading of the spillway capacity to pass the probable maximum flood without overtopping, doubling the former capacity. The MVSD also needed to increase reservoir capacity by 30 days without requiring shoreline protection. Spillway capacity was increased by adding a dual side channel emergence spillway. Reservoir capacity was increased by the addition of a high reinforced concrete curb to the embankment and an innovative inflatable rubber dam to the original spillway.
