Daily Rules, Proposed Rules, and Notices of the Federal Government
Take notice that the following hydroelectric application has been filed with the Commission and is available for public inspection.
j. This application is not ready for environmental analysis at this time.
The main spillway is a non-gated concrete ogee-type structure that is 200 feet long, 20 feet high and with crest elevation of 521 feet, which is directed to a vegetated natural ravine. The recreation pond spillway is a rock-cut channel approximately 140 feet wide and with a crest elevation of 520 feet.
The power intake facilities consist of four cylinder gates with trash racks in a cylindrical tower. Each intake supplies two units. Each intake leads to a 430-foot-deep vertical shaft then to a horizontal power tunnel, which divides into two sections. The power tunnel sections transition to a penstock that leads to one of the eight reversible pump-turbine units in the powerhouse. The power plant is constructed of concrete and is 133 feet wide and 600 feet long. It houses eight Francis turbines each equipped with a 100-MW generator. The powerhouse turbines each have a hydraulic capacity of 4,000 cfs, for a total discharge capacity from the powerhouse of 32,000 cfs. The pumping capacity of the pump turbines is 3,500 cfs each for a total powerhouse pumping capability of 28,000 cfs. Water flowing through the turbines is discharged via the draft tubes into the Susquehanna River adjacent to the powerhouse. The units are equipped with trash racks between the draft tube outlet and the river.
Electricity generated at the project is transmitted by two individual 220-kV transmission lines extending from the project switching station approximately 4.25 miles to the Peach Bottom Atomic Power Station (PBAPS) North Substation located in York County.
The Muddy Run Project has an authorized nameplate generating capacity of 800 MW and generates an average of 1,610,611 MWh annually. Exelon is not proposing any new or upgraded facilities or structural changes to the project at this time. Also, Exelon has engaged interested stakeholders to participate in the development of a comprehensive settlement agreement based on collaborative negotiation of specific terms and conditions for the new Muddy Run license.
l. Locations of the Application: A copy of the application is available for review at the Commission in the Public Reference Room or may be viewed on the Commission's Web site at
m. You may also register online at
n. Procedural Schedule: A preliminary Hydro Licensing Schedule will be provided in a subsequent notice.
o. Final amendments to the application must be filed with the Commission no later than 30 days from the issuance date of the notice of ready for environmental analysis.