Safe Harbor & Holtwood Dam Fish Ladders
 Customer:
Safe Harbor Water Power Corporation
Conestoga, PA
PP & L Incorporated (Holtwood)
Allentown, PA
Engineer:
Stone and Webster Engineering Corporation
Cherry Hill, NJ
Project Size:
$190,000.00
Process Description
The American Shad, a migratory fish once plentiful in the Susquehanna River basin and an important contributor to the local economy, all but disappeared with the construction of hydroelectric dams in the early 1900s. The fish could no longer travel upstream to their native spawning areas. With the construction of a "Fish Lift" at the Conawingo Dam in Maryland, shad were successfully reintroduced to the lower Susquehanna. In an agreement between utility companies and state and local government agencies, the addition of similar "fish lifts" to the Holtwood and Safe Harbor Hydroelectric dams were planned. These would give shad access to tributaries in another 30 mile stretch of the river. A "fish lift" is a complex mechanical system designed to attract the shad into an elevator of sorts and transport them to the lake formed in front of the dam.
Project Description
FEC Technologies was selected by the general contractor and electrical subcontractor to provide panel design and construction, and
PLC and HMI programming to provide sequencing of the lift and flow control of attraction water used to lure the shad into
the systems.
FEC's scope of supply:
- Manufacture 3 manual control consoles and 2 PLC/HMI stations
- Develop programs for PLCs for each system/location
- Configure and program HMIs for each system/location
- Coordinate with all trades and equipment vendors
- Start up all systems
- Train maintenance and operation personnel
- Ongoing system support
System Components
- 3 Allen Bradley SLC-5/04 PLCs
- 2 PC workstations with touchscreens running Wonderware Intouch HMI software
- 1 Power Plant Control Room PC workstation for monitoring (Safe Harbor)
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