GLENDALE II: DAMAGED TO MANAGED
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Client: New Castle County Dept. of Special Services

A portion of the Glendale II community suffered severe flood damage resulting from repeated storms over multiple years. Under the leadership of the County Executive and Council President, with the support of County Council, a plan of action was developed and funded.

A design build approach was selected as the best way to address the complex issues associated with this fast track project. The team of Duffield Associates, Inc. and Corrado American, Inc. was selected and, working with New Castle County Department of Special Services and DelDOT, an expedited plan was developed which included:

• Demolishing 7 severely damaged townhomes
• Constructing an on-site stormwater management pond
• Rehabilitating a malfunctioning stormwater management pond in the adjacent community of Kensington which flows onto Glendale II
• Constructing new storm sewers in Glendale II
• Directionally drilling a new storm sewer outfall under adjacent Route 40

Factors adding to the complexity of this project included:

• The need to relocate residents of the townhomes to be demolished
• Working immediately adjacent to occupied townhomes
• Numerous utility conflicts
• An accelerated implementation time frame

The design and construction of this project were substantially completed in 7 months for less than the approved budget. The project eliminated a long standing severe flooding problem, improved and maximized stormwater storage and runoff quality and provided redundancy and offsite conveyance to mitigate future flooding and drainage problems in the community. In addition, the value of the remaining homes in Glendale II was enhanced by removing the stigma associated with historic flooding.

This project was awarded the Honors Award by the American Council of Engineering Companies-Delaware.