Scope of Work
Cianbro furnished and installed steel reinforcing bands on Courses 14 and 16 of the surge tank at the Lake Wallenpaupack Hydroelectric Plant in Hawley, PA.
- Installed 90 feet of system scaffold around the 170 foot circumference of the surge tank with two working platforms
- Removed and reinstalled (70) 14 foot by 3.5-foot frost wall panels
- Blasted two areas of the tank (Courses 14 and 16 – each 5 feet high and 170 feet around the tank) to remove lead paint
- Installed temporary monorail around the tank to move steel plates
- Installed (48) 30-foot by 1.25-foot rolled steel plates (24 per Course) using a 30T RT crane and monorail system, and welded per ASME pressure vessel code to provide reinforcement to the tank in two locations
- Pumped and placed 300 cubic feet of non-shrink grout behind the new steel plates and filled the 2 inch gap between the existing tank wall and new steel bands
- Removed scaffold and demobilized the site
Lean, Innovative, and Unique Project Solutions
A single lane access road and lack of space at the tower base presented a challenge with moving materials to and from the site. Another challenge included performing a portion of the work on the side of a cliff next to a valley in the winter with high winds and freezing temperatures. Additionally, the crane could only access one-third of the tank so Cianbro developed and engineered a temporary monorail system that allowed efficient installation of the steel plates.