Flood Zone Determination

Often homeowners can get their property removed from FEMA’s Flood zone designation. CIE will perform an elevation study on your home and compare the location and elevation of the house to the flood plain requirements to determine if your home sits above the risk area.


For municipalities, dredging activities are used to maintain and ensure safe usage of our waterways for vessels. Coastal landowners often dredge to improve boat access to a private dock or bulkhead. The removal of mud and decomposed organic material from waterways can increase suitable shellfish habitat and promote improved water quality. When dredge areas are carefully selected and the project incorporates a robust shellfish seeding program, the end result can be a substantial net environmental benefit.

CIE works with municipalities and landowners to develop successful dredging strategies that eliminate impacts to our aquatic resources and wildlife. We will guide you through the very complex and lengthy permitting process and ensure that the project is a success. We also work with dredging contractors to conduct pre/post-dredge surveys utilizing our drone survey technology.

Hydrographic Mapping

Hydrographic surveying of the ocean floor depths and features is the foundation of any waterway project and is typically used in the design, permitting, and construction of piers and docks, marinas, and dredging projects.

Docks & Piers

Native to Cape Cod, CIE staff are local landowners and boat owners with a personal understanding of this issue. Town residents who pay taxes have a right to enjoy their property as long as it does not adversely impact the waterways. By law, you need a certified engineer to certify that a pier or dock is designed to ensure the prevention of damage to wetland resource areas and abutting properties, including erosion and sedimentation.

The MassDEP administers and enforces Chapter 91 licensing. CIE provides a complete set of services to assess, design and permit piers, bulkheads, boardwalks, and floating and seasonal docks for private, commercial, and municipal clients. We can guide you from proposal to permitting, from conceptualization to construction.

See the MassDEP’s Waterways Permitting Guide for details on which type of Chapter 91 authorization your proposed activity or project requires.

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