Project Name: York Haven Hydroelectric Development
Summary: Upstream and downstream fish passage design/build
Client: GPU / Genco
Project Location: York Haven, PA
Project Size: 20 MW
• Fish Passage Engineering — Upstream
and Downstream Design
• Construction Services
• Annual Facility Biological Monitoring
Project Timeframe: 1998 - 2000
Relationship with Client: Since 1998
The York Haven fishway design requirements were incorporated into a Settlement Agreement signed by the GPU/Genco subsidiary York Haven Power Company and five resource agencies as part of the York Haven relicensing process. To reduce the project’s cost, shorten the construction schedule, and limit risk, GPU/Genco solicited design/build proposals from a pre-qualified list of bidders. A design/build joint venture of Kleinschmidt and Cianbro Construction Company was awarded the project.
The fishway primarily consists of a 67 foot long notch in the 11 foot high east channel dam that allows downstream passage if the river flow is low during the annual migration period from April 1 to the end of June. The flow of water through this notch is controlled by a new upstream permanent structure that has two 20 foot wide gated openings. The water flowing through the notch also provides attraction flow to help upstream migrating fish locate the staggered pool vertical slot fish ladder which is also part of the fishway. The fish ladder allows the fish to migrate upstream during periods of low river low. The fishway was hydraulically designed to also allow upstream passage through the dam notch and 20 foot gates during higher river flows as well. Since construction of this project Kleinschmidt has assisted by providing annual biological monitoring services for the April to June operation of the upstream passage facility.
The Joint Venture’s proposal to alter the original concept and install an upstream cofferdam so that the gated structure could be constructed in the dry, resulted in shortening the length of construction, and improved the quality of the structure’s bond with the foundation. As a result of this project, this site now meets its mandated upstream fish migration requirements.