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Sallie Mae Stormwater Pond Retrofit

Sallie Mae Stormwater Pond Retrofit

Landmark was retained by the corporate owner to work with their project team to prepare design and construction plans to improve the capacity and function of the existing stormwater pond at their Delaware HQ during a facility expansion. The landscape architectural concept plan addressed the owner’s desire for pond beautification and the addition of recreational amenities on the constrained site along I-95, but did not focus on the state’s stormwater management or water quality requirements. Landmark provided the necessary design, analysis and construction plan preparation to facilitate the approval and construction of the pond, while meeting or exceeding all regulatory requirements for stormwater and water quality. Design innovation succeeded in meeting aesthetic and recreational criteria while removing the pond from service to expedite construction.

The award-winning pond retrofit features a 950-foot long walking path around the 300-foot wide, landscaped stormwater pond. A walkway crosses over the pond on a dramatic 6-foot high stone weir that creates an 8,000-gallon upper pond that feeds water to the 96-foot wide waterfall. A boardwalk at waters’ edge for nature viewing, exercise stations, and picnic areas offer enjoyment for the company’s employees.

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