The U.S. Army Corps of Engineers office in Pittsburgh is taking comment until Nov. 23 on a Section 404 Clean Water Act permit application from Hydro Green Energy LLC for a new hydroelectric facility to be located on the Monongahela River, river mile 11.2, left bank, in Allegheny County, Pennsylvania.
Hydro Green Energy proposes construction and maintenance of a power-generating modular facility at this site. The facility, called the Braddock Locks and Dam Hydroelectric Project, would consist of a new 105-foot by 22-foot steel-frame powerhouse with seven turbine generators, a switchyard and control room, a trash rack, and a distribution-level powerline. It would be located on the existing weir adjacent to the spillway gates. The powerhouse would be laid on a new concrete foundation on rock that would be anchored to the left closure weir.
This construction (e.g., placement of cofferdams, temporary dewatering and excavation for the installation of concrete) will result in disturbance and displacement of the river bottom. Most of the project work would be conducted from a barge upstream and downstream from the weir. Erosion and sedimentation controls are to be in place during construction, the Corps noted.
Upon completion, the proposed project would operate in run-of-release mode, meaning it would not impound water or control the flows of the river. The facility would be a permanent structure in the river, requiring long-term maintenance dredging.
A project contact listed in the Corps nortice is: Mark R. Stover, Hydro Green Energy LLC, P.O. Box 385, Westmont, IL 60559.
The U.S. Department of Energy in October 2015 had issued a finding of no significant impact and a final environmental assessment related to a hydroelectric project on the Monongahela River in Allegheny County, Pennsylvania, where DOE will provide funding help to demonstrate new technology. DOE’s environmental assessment was largey based on a final environmental assessment that the Federal Energy Regulatory Commission issued in June 2014 for the Braddock Locks and Dam Hydroelectric project of Hydro Green Energy.
The FERC-licensed project would include construction of: a powerhouse with seven turbine-generators at the left closure weir on the south side (river left) of the Corps’ existing Braddock Locks and Dam, having a total installed capacity of 5.25 MW; a 0.45-mile-long, 23-kV transmission line; and a switchyard and control room. The project’s average annual electricity generation is estimated to be 32,263 megawatt-hours (MWh).