The winning group receives the Diamond Award. From left to right, Dave Johnson (LDG), Steve Wilver (LDG), Shannon Berkey (Danville Borough), Jamie Shrawder (Danville Borough), Sean Henderson (ACEC/PA), and Ed A’Zary (Danville Borough).
Larson Design Group recently received a Diamond Award for Engineering Excellence in Category G, Water Resources, from the American Council of Engineering Companies of Pennsylvania.
The winning project was the Borough of Danville’s dike closure project. After 1972’s Hurricane Agnes, the Pennsylvania Department of Environmental Protection worked on raising Danville’s flood works to approximately two feet above the storm’s high-water levels. The final phase of this undertaking was constructing a closure along Mahoning Creek near the intersection of State Routes (SR) 54 and 11. The previous method involved sandbagging a portion of SR 11 and the railroad crossing; time-consuming and labor-intensive, this did not provide adequate protection.
LDG developed a phased construction scheme and made use of detours and temporary traffic signals to keep traffic running smoothly on the busy SR 11. The project was further complicated by the presence of underground utilities and an active railroad line that could only be taken out of service over a three-day weekend. Schnabel Engineering worked as a subconsultant to LDG and together, LDG and Schnabel developed a cutoff wall solution to work around the underground utilities and control seepage.
LDG conducted feasibility studies and an alternatives analysis, prepared applications for grant assistance, obtained permits, and designed construction drawings, specifications, and contract documents. LDG also obtained a $3.8 million H2O grant from the Department of Community and Economic Development, Commonwealth Financing Authority on Danville Borough’s behalf.
Coordination with SEDA-COG Joint Rail Authority was required to meet their requirements without jeopardizing the flood closure system. LDG developed a precast concrete system for the railroad closure footings, minimizing construction duration and meeting allowed outage requirements.
Representatives from the Borough of Danville, as well as Larson Design Group employees, received the award at the ACEC/PA Diamond Awards Gala in Lancaster on March 10th.