Glenbrook Cables Transmission Project

Location: Western Connecticut

Client: Connecticut Light & Power

Completion Date: 2008

Under a program management agreement with Connecticut Light & Power Co. (CL&P), Burns & McDonnell provided services for land acquisition, environmental permitting and permit compliance for the Glenbrook Cables Transmission Project. The 8.7-mile project involved the underground construction of two 115-kV electric transmission lines through highly developed portions of southwest Connecticut, extending form Stamford to Norwalk.

Permitting activities included the development of the Connecticut Siting Council’s (CSC) Development and Management (D&M) plans, as well as managing for compliance with those plans and other permits during construction. Burns & McDonnell managed the permitting effort, which included a Section 404 permit, Section 401Water Quality Certification, Section 402 National Pollution Discharge Elimination System Permit and Stormwater Pollution Control Plan, Section 106 Cultural Resources concurrences, Stream Channel Encroachment Line permits, Connecticut Department of Transportation Permits, Department of Public Utility Control approvals and local permits.

Permanent easements and temporary construction easements were acquired for off-street splice vaults approximately every 1,600 feet along the 8.7-mile route.

  • Permit management
  • Permit application preparation and acquisition
  • Permit compliance
  • Access agreements
  • Property valuation
  • Easement document and drawing preparation
  • Negotiations with property owners
  • Recording of legal documents
  • Condemnation support
  • Construction coordination

The Glenbrook Cables Project was designed to meet continuing growth in customer electric use in southwestern Fairfield County. The project provides direct transmission connections from CL&P's new transmission facilities in Norwalk to Stamford. These new transmission facilities enable CL&P to meet national reliability standards, which help to ensure a more secure regional transmission grid. The project crosses through the towns of Stamford, Darien and Norwalk.

The route extends 8.7 miles east from CL&P's substation on Hamilton Avenue in Stamford. The line was installed along Hamilton Avenue and Brookside Drive before crossing the Noroton River into Darien. In Darien, the route continues north, then east along an access road behind a Connecticut Department of Transportation service area for I-95 and an access road between the Noroton Heights railroad station and I-95. From there, it continues northeast along Ledge Road before joining U.S. Route 1 (Boston Post Road) and proceeds northeast through Darien and Norwalk. In Norwalk, the route continues northeast along U.S. Route 1 (Connecticut Avenue and then Van Buren Avenue), before continuing north along Riverside Avenue. From Riverside Avenue, the route crosses beneath the Norwalk River, into CL&P's substation on New Canaan Avenue.

  • CSC D&M plan preparation and compliance
  • Category II wetland permit for river crossings
  • Required more than 40 permits/approvals
  • Underground easements for 72 properties