Mount Joy Borough is getting a state grant of $176,022 to proceed with its stormwater basin rehabilitation project to alleviate flooding within the borough.
The grant was approved Tuesday, Sept. 17, by the Commonwealth Financing Authority, which is an independent agency of the Department of Community and Economic Development that was established in 2004 to administer Pennsylvania’s economic stimulus packages.
“Mount Joy has experienced major flooding events due to the limited capacity of their stormwater basin,” state Rep. Dave Hickernell said. “The basin has flooded twice in a seven-year period, causing significant damage, particularly on private property and a railroad right-of-way. I am pleased the CFA saw the importance of this project in the application and provided a significant portion needed to get this flood project done.”
“The stormwater basin was built in 1994 and was supposed to have the capacity to handle a 100-year storm event,” state Sen. Ryan Aument said. “However, recent studies have determined that the basin can only handle 60 percent of the water from a 100-year storm event, leading to heavy flooding during Tropical Storm Lee in 2011 and a flash flood event on August 31, 2018.”
Mount Joy Borough Manager Sam Sulkosky said the basin upgrade is desperately needed as residents are anxious about another flood, and the damage caused by previous floods has been very costly in property loss, damage and cleanup.
Sulkosky detailed the scope of work the CFA grant will enable to be accomplished. It will reconstruct the swale/pipe in the northwest corner of the basin, excavate the basin bottom by 2 feet and regrade at a 0.50% slope to maintain appropriate dewatering time and raise the basin berm to an elevation of 385.00 and the spillway to an elevation of 384.50.
These three improvements will increase the capacity of the basin by 159,000 cubic feet to a total holding capacity of 325,907 cubic feet. In addition, the project will update the outlet structure in the southwest corner to have a 4-inch orifice with an invert of 376.12 and a 6-inch orifice with an invert of 380.00 to decrease the peak discharge of the basin. After the project is completed, the basin will accommodate the 100-year storm event and mitigate the existing flood risk.
The CFA holds fiduciary responsibility over the funding of programs and investments in Pennsylvania’s economic growth. Unique among state agencies in structure and scope, the CFA consists of seven board members: four legislative appointees and the secretaries of DCED, the Office of the Budget and Department of Banking and Securities. Project approval requires five affirmative votes, four of which must come from legislative appointees.