At the Gorge Hydroelectric facility, power transmission lines cross the Winooski River close to the dam spillway presenting a substantial icing issue (from spillway spray) for the conductors. The facility’s staff regularly used a nearby utility bridge to stage ice removal activities, and the client was interested in modifying the transmission line to reduce or…
The Hooksett Hydroelectric Project includes a 1.6 MW run-of-the-river hydroelectric power generation dam that is a barrier to aquatic organism passage (AOP), including Blueback Herring, American Eel, and American Shad. D&K worked closely with officials from the U.S. Fish and Wildlife Service and the National Oceanic and Atmospheric Administration regarding the details of the design,…
Located on the Otter Creek, the Huntington Falls Hydroelectric Project is a historic facility that required redevelopment. The D&K team assessed the two non-operational turbines and related appurtenances, the trash rack, and raker upgrades to the Unit 3 turbine following FERC relicensing. Additional D&K services included design and coordination to upgrade all three turbines, resulting…
The transmission line owner required updated condition information on the foundation and structural support members of 165 high-tension lattice electrical transmission towers. D&K’s structural engineers visited each tower along the entire length of the project, often in remote locations with challenging terrain and access. We used a cloud-based assessment system to allow office personnel to…
The Vergennes 9B Hydroelectric facility is a historic hydroelectric plant on the Otter Creek centrally located in downtown Vergennes. Its penstocks were nearing the end of their service lives, and the facility was in need of reconfiguration and operational improvements. D&K worked with the client to design new penstocks and reconfigure the powerhouse to significantly…
To maintain operation under its FERC-issued license, the owner was required to furnish a Part 12D Inspection Report to FERC. Serving as the Part 12D independent consultant, D&K’s engineering team reviewed and analyzed performance and design data and conducted a visual inspection of the water retaining portion of the facility, including both abutments, both powerhouses,…
Located downstream of a large flood control dam, the EHC hydroelectric facility includes turbines at two locations along a one-mile-long intake channel and produces approximately 1.26 MW. The owner needed to replace and upgrade various components of the intake, including replacing the headgate lifting frame, replacing the rack-raker system, replacing the existing timber site/retaining walls…
To address conditions posed by structural concrete sections nearing the end of their service life, the owner needed to rehabilitate the intake structure at the lower Middlebury hydroelectric project. The D&K team designed improvements, including a new reinforced concrete headwall structure to utilize portions of the existing headwall while allowing for equipment clearance requirements. D&K…
D&K provides civil, structural, mechanical, water resource, dam, environmental, and geotechnical engineering and permitting assistance to support maintenance and upgrades to a Northeast-focused hydroelectric utility. Project types include penstock inspections, power generation and project redevelopment studies, new fish passage systems, fish passage system maintenance, FERC licensing support services, permitting assistance, survey, substation and lattice structure…