A.D. Marble completed Stage I and Stage II environmental analysis and National Environmental Policy Act (NEPA) documentation for the US 220 Project Planning Study. The project focused on improving the existing transportation system from I-68 to Cresaptown via US 220 and MD 53 by increasing vehicular and pedestrian mobility and safety.

Stage I studies consisted of:

• Natural environmental inventory, including wetlands, waterways, floodplains, threatened and endangered species, and potential hazardous waste sites
• Socioeconomic inventory, including community facilities and services, parks, recreation areas, Plan Maryland Growth and Preservation areas, and Environmental Justice populations
• Preparation of environmental and socioeconomic inventory mapping and impact assessment on eight preliminary alternatives
• Preparation of the Environmental Assessment Form (EAF).
• Assisting with interagency coordination and public involvement meetings

Stage II studies consisted of:

• Conducting wetland and waterway delineation and tree survey
• Preparation of the Natural Environmental Technical Report
• Preparation of the Community Effects Assessment
• Preparation of the Initial Site Assessment
• Preparation of Categorical Exclusion