For decades, marine construction on Long Island was a straightforward, heavy-civil game: if a shoreline was eroding, you drove steel sheet piles, poured concrete, or stacked massive riprap boulders. But a sweeping combination of environmental reality, shifting state legislation, and updated procurement rules has completely rewritten the playbook.

Today, marine contractors, engineers, and developers face a heavily regulated landscape where nature-based infrastructure is no longer an eco-friendly alternative, it is the legally mandated baseline. Navigating this transition requires a deep look at the strict construction law, complex permitting hurdles, and contractual risks defining Long Island’s modern blue infrastructure projects.

The Statutory Mandate: NYSDEC and S5186A

The biggest change to traditional marine construction came with the passage of New York State Senate Bill S5186A. This law altered the Environmental Conservation Law by requiring the New York State Department of Environmental Conservation (NYSDEC) to enforce a clear policy: nature-based solutions are now the preferred alternative for tidal shoreline stabilization.

The Burden of Proof Shifts to the Contractor

Under current regulations, an applicant cannot simply apply for a permit to repair or build a traditional bulkhead.

• The Alternatives Analysis: Construction firms must submit an exhaustive site assessment proving that a nature-based solution (such as a living shoreline, rock sill, or planted marsh) is structurally unsuitable for the site due to extreme wave energy or land-use restrictions.
• The Maximum Extent Possible Rule: Even if a traditional “hardened” structure is deemed necessary, the NYSDEC requires the final design to integrate natural elements—such as texturized, biomimetic concrete facing or native vegetation pockets—to the maximum extent possible.

Underwater Real Estate: Navigating the Suffolk County Lease Program

Blue engineering isn’t just happening at the high-water mark; it has expanded deep into the bays. The scaling up of kelp farming and oyster reef restoration as bio-filtration infrastructure has forced a major overhaul in underwater property rights.

Historically, the Suffolk County Aquaculture Lease Program (SCALP) was strictly limited to shellfish. However, landmark state legislation (such as Chapter 623 of the Laws of New York) officially expanded the county’s authority to lease underwater lands ceded by the state in Gardiner’s Bay and Peconic Bay for seaweed and kelp cultivation.

The Multi-Agency Permitting Gauntlet

For marine contractors hired to install these floating arrays or benthic structural anchors, securing the underwater lease is only step one. A typical project requires a web of overlapping approvals:

1. NYSDEC Article 15 (Protection of Waters): Required for any disturbance to the bed or banks of a navigable water body.
2. U.S. Army Corps of Engineers (USACE) Section 10/404 Permits: Regulates any structures or work placed within the navigable waters of the United States.
3. Local Town Trustees: On Long Island’s East End, historical colonial patents grant local Town Trustees (such as in East Hampton or Southampton) independent authority over underwater lands, adding a hyper-local layer of property law that contractors must clear.

Contractual Risks and Liability in Living Infrastructure

Transitioning from steel and concrete to living systems introduces legal risks into standard construction contracts. Traditional construction law revolves around clear-cut warranties: a bulkhead is either built to specification or it isn’t. Living shorelines, however, rely on biological growth to achieve structural integrity.

1. Performance Warranties vs. “Natural Acts”

If a marine contractor installs an engineered rock sill and plants thousands of square feet of salt-tolerant smooth cordgrass (Spartina alterniflora), who is liable if a Category 2 hurricane wipes out the vegetation three months later?

• The Fix: Modern marine contracts must carefully decouple structural workmanship from biological survival. Smart contractors are rewriting their Substantial Completion clauses to trigger the moment the physical layout (grading, rock placement, initial planting) matches the design drawings, rather than waiting for the vegetation to mature.

2. Extended Maintenance and Monitoring Obligations

Unlike a concrete wall that requires minimal short-term maintenance, living shorelines require active stewardship (weed control, replanting, and sediment monitoring) during the first 2 to 3 years.

• Legal Trap: Contractors must avoid open-ended maintenance clauses. Contracts should explicitly define the Grow-In Period, specify exact thresholds for acceptable plant mortality (e.g., “replanting required if mortality exceeds 20% in Year 1”), and allocate the ongoing costs of environmental monitoring mandated by the NYSDEC permit.

Blue engineering on Long Island has shifted marine construction from a pure civil design problem to a complex matrix of environmental law, property leasing, and dynamic risk management. For contractors and developers who learn to navigate the NYSDEC’s nature-based preferences and structure their contracts to handle living assets, the regulatory tide represents a massive, high-value market. For those relying on old-school bulkheads, the legal waters are only going to get rougher.

John Caravella Esq., is a construction attorney and formerly practicing project architect at The Law Office of John Caravella, P.C., representing architects, engineers, contractors, subcontractors, and owners in all phases of contract preparation, litigation, and arbitration across New York and Florida. He also serves as an arbitrator to the American Arbitration Association Construction Industry Panel. Mr. Caravella can be reached by email: [email protected] or (631) 608-1346.

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Resources:

• New York State Senate Bill S5186A / Chapter 487 (Environmental Conservation Law)
• New York State Senate Bill S6532A / Chapter 623 (Aquaculture Lease Expansion)
• NYSDEC Living Shoreline Techniques in the Marine District Guidance Document
• S. Army Corps of Engineers (USACE) – New York District Regulatory Program (Section 10/404)
• New York Sea Grant Coastal Permitting Guide (Stony Brook University / Cornell University)