- West End Substation
The West End project came about in response to a study by the Ohio Department of Transportation (ODOT). The Brent Spence Bridge, which takes interstates 71 and 75 across the Ohio River, is aging and needs to be replaced. However, the existing Duke Energy West End Substation was just a few hundred feet west of the existing bridge. The new bridge will cross directly through the East Yard lattice structure. As a result, a new substation yard had to be built in the adjacent area.
Furthermore, the West End site formerly included a manufactured gas plant (MGP), and before construction, the existing facility required remediation. Finally, because the site is on the north bank of the Ohio River, all electrical infrastructure had to be installed above flood levels.
The new East Yard design consisted of a 16-bay, 138-kV lattice structure for a breaker-and-a-half switchyard. Due to the flood level constraint, all equipment including power transformers and circuit breakers had to be installed at least 17 feet above grade, as opposed to sitting on foundations on the ground. Aging equipment in the existing yard was replaced as part of this project. In all, the project involved four 138/13-kV transformers and ground banks (with provisions for a future fifth), 16 138-kV breakers, 20 13-kV switchgear breakers, three overhead 138-kV transmission lines, two underground 138-kV transmission lines, two 138-kV tie busses, and 12 13-kV tie busses. All bus and equipment had to be designed for 50kA fault current.
Duke Energy decided that all transmission relaying should be replaced as part of this project. The protection and control design involved almost 90 panels and 1,000 engineering drawings. Burns & McDonnell completed the engineering design for all equipment in the new control building in spring 2014; the engineering necessary to tie into the existing 13-kV downtown network was finished in summer 2014. This project was constructed in advance of the Brent Spence Bridge replacement project, allowing downtown Cincinnati’s power to run uninterrupted throughout a major infrastructure renovation.
Burns & McDonnell handled acquisition of permits, detailed engineering and architectural design, and construction support.
- Project management
- Detailed engineering and architectural design
- Permit acquisition
- Construction support
- Substation elevated approximately 18 feet above finished grade to prevent flood damage
- Power and grounding transformers located approximately 18 feet above finished grade
- Elevated tray and walkway systems throughout the substations
- Two-story control building with switchgear and 92 relay panels on second story
- Downtown Cincinnati project site