Sammis Power Plant
Location: Stratton, OH
Owner: Bechtel Power Corporation
General Contractor: First Energy Generation Corporation
Value: $24.2 Million
Date Complete: March 2008
Brayman was selected by Bechtel as the design/build deep foundation contractor for First Energy’s Sammis Power Plant FGD/SCR upgrades. In order to meet federally mandated clean air regulations, Brayman was contracted to design and install over 5,000 driven H-piles and over 300 drilled micropiles for the deep foundations of various structures across the project site.
Ultimately, four different driven H-pile designs and two different micropiles designs were incorporated in the multitude of new facilities proposed for this site. The new 990ft chimney required over 750 H-pile totaling in excess of 10 miles of steel pile material at a single location. Access to all of the driven H-pile work was from land and incorporated up to four pile driving crews at one time. Scheduling of the piling crews was critical to the success of this project since many of the design/build foundations were scattered throughout the project site and approved for construction as they came available. Brayman was also contracted to install various temporary shoring walls to support and protect existing structures throughout the project.
In areas where conventional driven piles could not access the work, micropiles were designed and installed to support the necessary foundation loadings. The majority of the piles installed were 150ton compression and 75ton tension micropiles using a 7-5/8in OD casing. Nearly all of the micropiles were installed along the river’s edge to provide support for the duct work for the ID fans and had to be accessed from barge-mounted equipment. Piles ranged in length from 85 to 110ft. A small number of micropiles were required in the plant for new pipe rack locations and had to be installed in low headroom conditions due to the tight site constraints. In all, 288 micropiles were incorporated into the upgrades at the Sammis Power Plant.