Sunset Lake Outfall Remediation

Stormwater Outfall Remediation and Bank Stabilization Stormwater discharging from three degraded outfalls on private property located adjacent to 100 GBC Drive, coursed steep slopes to Sunset Lake. Over time, severe erosion occurred and caused sedimentation to enter the lake.  This recreational body of water was created around 1900 with the construction of a dam in […]

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Promenade Wetland Mitigation

The western half of the 101-acre property was developed in 1962 as a manufacturing facility, and later used as a storage facility and a retail business. Landmark was contracted to perform a Phase I Environmental Site Assessment, a wetland delineation, and a forest stand delineation on the subject property by the developer who intended to […]

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Channel Restoration at Avenue North

Channel restoration at Avenue North is an award winning project that included channel restoration, bank stabilization and new innovative stormwater outfall structures to prevent erosion and loss of habitat and tree canopy. It improved downstream water quality for a large drainage system and reduced risk to the public and private infrastructure associated with the mixed-use […]

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Airport (GED) 4-22 Runway Extension

As subconsultant to Urban Engineers for on-call airport engineering services required for a new 500 linear foot runway extension to the main 5,000 LF runway at Delaware Coastal Airport in Georgetown, Landmark provided surveying, environmental services, stormwater design, erosion and sediment control, agency processing, and GIS services in accordance with FAA circulars AC 150/5300 – […]

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Airport Off-Site Wetland Mitigation

This 9.06± acre forested/scrub-shrub Wetland Mitigation project consisted of four separate wetland creation “pods” that were constructed in Selbyville, Delaware during spring 2012 as off-site compensatory mitigation for runway expansion activities conducted at the Delaware Coastal Airport in Georgetown in order to resolve an outstanding wetland violation from the 1990s, Landmark scientists coordinated closely with […]

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