Cambridge officials will install a full-scale model of a proposed earthen berm, a key element of Cambridge’s long-term flood-mitigation strategy at Long Wharf Park beginning December 3. It will remain in place for the first two weeks of December.
Intended to give residents a clearer understanding of how the project would look and function once completed, the berm model represents a raised bank of earth designed to help shield neighborhoods and public spaces from rising water levels along the Choptank River.
In Cambridge, berms serve two primary roles: directing stormwater runoff to safer locations and forming barriers to prevent high water from entering parks, streets, and nearby homes.
The existing berm along the waterfront stands about three to four feet above the surrounding grade. Still, project engineers say flood-risk analyses show that a height closer to seven feet would be necessary to protect Long Wharf Park, adjacent roads, and nearby residences under current and projected future flooding conditions.
The model at Long Wharf aims to help residents visualize the proposed height and understand how the structure might affect views and the surrounding landscape. City officials say public feedback will play an essential role as design decisions move forward.
Part of a Larger Flood-Mitigation Strategy
The berm project is one piece of the broader “Make Cambridge Resilient Flood Mitigation Plan,” a multi-year effort to protect the city from increasing flooding, higher tides, and projected sea-level rise.
The plan calls for a continuous, coordinated level of flood protection along the city’s shoreline, particularly the Choptank River and Cambridge Creek, where engineers say no single segment can be protected effectively unless the entire waterfront works as a connected system. The strategy blends engineered structures, such as berms and floodwalls, with nature-based measures like living shorelines, wetlands, and improved stormwater features.
Flood modeling conducted for the plan examined current nuisance flooding, projected water levels for 2050, and Federal Emergency Management Agency (FEMA) Base Flood Elevation standards. Results show that several low-lying areas are vulnerable to overtopping under future conditions, underscoring the need for a unified, elevated line of defense along the waterfront.
Area-Specific Recommendations
Five major shoreline areas are prioritized in the plan, each with tailored recommendations:
- Gerry Boyle Park/Great Marsh: Suitable for earthen berms, improved stormwater management, and restoration of natural shoreline features.
- West End Neighborhood: Limited space near homes makes a floodwall the preferred option, with care to preserve public access for fishing and recreation.
- City Marina & Yacht Club: Calls for bulkhead enhancements and potential vegetated berms to balance flood protection with continued boating access.
- Cambridge Creek Corridor: Recommendations include elevating or acquiring the most vulnerable homes and requiring commercial structures to be floodproofed to safer elevations.
- Sailwinds/CWDI Redevelopment Area: Designs call for a raised promenade and flood-resistant construction to safeguard future development.
Nature-Based Solutions and Policy Updates
Alongside structural measures, the plan promotes the expanded use of nature-based flood protection, including living shorelines and green infrastructure such as permeable surfaces and bioretention systems. A citywide map identifying the most suitable locations for these methods is under development.
To support long-term resilience, the plan also recommends updates to zoning, shoreline setbacks, and development standards in high-risk areas. It suggests strengthening buyout or relocation programs for the most flood-prone properties and ensuring that future public projects account for sea-level-rise projections.
Funding and Implementation
The city is pursuing federal funding through FEMA’s Building Resilient Infrastructure and Communities (BRIC) program, Hazard Mitigation Grant Program, and Flood Mitigation Assistance programs. Local financing tools, such as a stormwater utility or special taxing district, are also under consideration to support construction and ongoing maintenance.
A dedicated flood-mitigation staff position is proposed to oversee project implementation, coordinate with state and federal agencies, and maintain the city’s long-term resilience strategy.
Next Steps
City officials say public engagement will continue to shape the direction and pace of the flood-mitigation program. The upcoming berm model display is expected to be one of several opportunities for residents to learn about the proposed improvements and provide input.
More information on the Make Cambridge Resilient initiative is available at www.makecambridgeresilient.org.
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