Michigan’s Great Lakes shoreline is one of the state’s most valuable—and vulnerable—natural assets. With fluctuating lake levels, powerful storm surges, ice action, and ongoing erosion, many waterfront property owners turn to seawalls to protect their land and investments. However, building a seawall in Michigan is not a simple construction project. It requires careful planning, regulatory compliance, and professional execution to ensure the structure is legal, effective, and long-lasting.
This article walks through the entire process of obtaining permits, planning a seawall project, and constructing a seawall in Michigan, from the first site evaluation to final installation.
Understanding Why Permits Are Required in Michigan
Michigan closely regulates shoreline construction to protect water quality, aquatic habitats, navigation, and neighboring properties. Seawalls alter natural shorelines and wave dynamics, so they fall under state and federal oversight.
Most seawall projects require permits because they involve:
- Work below the ordinary high-water mark
- Placement of materials into waters of the state
- Alteration of natural shoreline processes
Failure to obtain the proper permits can result in:
- Stop-work orders
- Costly fines
- Forced removal of the seawall
- Difficulty selling the property in the future
Step 1: Initial Site Evaluation and Feasibility
The first step in any Michigan seawall project is a professional site evaluation. This determines whether a seawall is appropriate and what type will perform best.
Key Factors Evaluated:
- Severity of erosion
- Soil conditions (sand, clay, fill, or mixed soils)
- Slope and bluff height
- Wave exposure and prevailing winds
- Lake or waterbody type (Great Lake vs inland lake)
- Existing shoreline structures
- Setbacks and property boundaries
In many cases, alternative solutions such as stone revetments or hybrid systems may be considered if a traditional seawall is not suitable or approvable.
Step 2: Engineering and Design Planning
Once feasibility is confirmed, the next phase is engineering and design. Michigan regulators require seawalls to be properly designed to avoid causing downstream erosion or structural failure.
Design Considerations Include:
- Wall type (steel sheet piling, vinyl, concrete)
- Embedment depth
- Height above high-water mark
- Tieback systems or anchors
- Toe protection to prevent scour
- Drainage and pressure relief behind the wall
A professional design ensures:
- Structural stability
- Long-term durability
- Compliance with Michigan regulations
- Protection of adjacent properties
For larger or more complex projects, stamped engineering drawings may be required.
Step 3: State Permitting Through EGLE
In Michigan, most seawall permits are issued by the Michigan Department of Environment, Great Lakes, and Energy (EGLE).
Common Permit Types:
- Joint Permit Application (JPA)
Covers state and federal requirements through one application.
EGLE reviews projects under:
- Part 301 (Inland Lakes and Streams)
- Part 303 (Wetlands)
- Part 325 (Great Lakes Submerged Lands)
What EGLE Evaluates:
- Environmental impact
- Necessity of the seawall
- Alternatives to hard armoring
- Potential impacts on aquatic habitat
- Public trust considerations
Permit approval can take several weeks to several months, depending on project complexity and lake type.
Step 4: Local and Municipal Approvals
In addition to state permits, many Michigan municipalities require:
- Zoning approval
- Building permits
- Setback variances
- Floodplain compliance
Local governments often review:
- Property lines
- Neighbor impacts
- Visual aesthetics
- Compliance with local shoreline ordinances
This step is critical, as local approval is often required before construction can begin—even after EGLE permits are issued.
Step 5: Federal Permits (When Required)
Some seawall projects also require approval from the U.S. Army Corps of Engineers, particularly if:
- The project impacts navigable waters
- There is placement of fill below the ordinary high-water mark
- The shoreline is part of federally regulated waters
Often, the Joint Permit Application coordinates this review automatically, but timelines may be extended if federal review is required.
Step 6: Timing and Seasonal Restrictions
Michigan imposes seasonal construction restrictions to protect fish spawning and aquatic ecosystems.
Common timing considerations include:
- No in-water work during certain fish spawning periods
- Ice conditions on the Great Lakes
- Storm season limitations
Proper scheduling is essential to avoid delays and permit violations.
Step 7: Pre-Construction Preparation
Before construction begins, contractors must:
- Verify permit conditions
- Mark property boundaries
- Establish erosion control measures
- Stage materials properly
- Coordinate equipment access (land or barge-based)
Any deviation from approved plans must be cleared with regulators before proceeding.
Step 8: Seawall Construction Process
While construction methods vary by design, most seawall installations follow a structured sequence.
Typical Construction Steps:
- Site access and preparation
- Driving or installing sheet piling or wall components
- Installing tiebacks or anchors
- Backfilling with appropriate material
- Installing drainage systems
- Adding toe protection or revetment stone
- Capping and finishing the wall
Construction may take anywhere from a few days to several weeks, depending on site conditions and wall length.
Step 9: Inspection and Compliance
Many permits require:
- On-site inspections
- Photo documentation
- As-built drawings
Inspections confirm:
- The seawall matches approved plans
- Environmental protections were followed
- No encroachment occurred beyond permitted areas
Final compliance documentation is often required to officially close out the permit.
Step 10: Long-Term Maintenance and Monitoring
A properly designed seawall can last 40 to 75 years or more, but maintenance is still essential.
Ongoing Responsibilities:
- Inspect for movement or corrosion
- Maintain drainage behind the wall
- Monitor toe protection
- Address minor repairs early
Neglecting maintenance can shorten the lifespan and lead to costly repairs.
Common Mistakes to Avoid
Many shoreline projects run into trouble due to:
- Starting work before permits are approved
- Hiring unqualified contractors
- Ignoring drainage and groundwater issues
- Choosing materials based on cost instead of suitability
- Failing to plan for long-term lake level changes
Avoiding these mistakes protects both your investment and Michigan’s shoreline resources.
Why Professional Guidance Matters
The permitting, planning, and construction of a seawall in Michigan is a multi-layered process involving engineering, environmental law, and construction expertise. Working with experienced marine contractors and permit professionals reduces risk, speeds approvals, and ensures a successful outcome.
A properly permitted and constructed seawall:
- Protects property value
- Prevents further erosion
- Complies with state and federal law
- Provides long-term shoreline stability
Final Thoughts
Building a seawall in Michigan is not just about stopping erosion—it’s about doing it responsibly, legally, and sustainably. By understanding the permitting process, planning requirements, and construction steps, property owners can make informed decisions and avoid costly missteps.
When done correctly, a seawall is a long-term investment that safeguards both private property and Michigan’s treasured waterfronts.