Lake Marion Dock Permits: 2025 Rules & Costs

Who Issues Dock Permits on Lake Marion

Santee Cooper — the South Carolina Public Service Authority, a state-owned electric utility — administers all property and permitting along Lakes Marion and Moultrie under its FERC license (Project 199, relicensed January 20, 2023 for 50 years through 2073). Santee Cooper operates under a General Permit framework issued by the U.S. Army Corps of Engineers Charleston District, which delegates permit authority to Santee Cooper for the lake system. The practical result: Santee Cooper is your single point of contact for any dock, pier, boat lift, riprap, bulkhead, or shoreline modification on Lake Marion. The Corps is in the background but is not the office you deal with.

This is meaningfully different from other major SC lakes. Duke Energy issues permits on Lake Wylie and Lake Keowee. Dominion Energy/SCE&G issues permits on Lake Murray. The USACE Savannah District issues permits on Lake Hartwell and Lake Thurmond. On Lake Marion, it is Santee Cooper Property Management, 1 Riverwood Drive, P.O. Box 2946101, Moncks Corner, SC 29461. Phone: 843-761-4068 or 888-206-4915 toll-free. Email: property@santeecooper.com.

The Non-Transfer Rule: What Makes Lake Marion Different

This is the fact that surprises most Lake Marion buyers. Dock permits on Lake Marion are not transferable. When you buy a lakefront property, the previous owner's Santee Cooper water-based permit terminates with the sale. It does not convey with the deed. You must apply to Santee Cooper for a new permit in your name.

Compare this directly to Lake Murray: Dominion Energy/SCE&G dock permits at Lake Murray do transfer at closing — the permit stays with the structure when ownership changes. This is one of Lake Murray's documented buyer advantages and one of the reasons buyers who research both lakes often list it as a differentiator. On Lake Marion, there is no transfer mechanism. Every closing involving a lakefront property with a dock is a fresh permit application regardless of whether the dock is 2 years old or 20 years old.

The practical implications: the application process requires adjacent property owner notification and a two-week public notice period (unless adjacent owners sign the application drawing in advance). Santee Cooper may require a field inspection to verify the dock meets current construction standards before issuing the permit. If the dock was built under older specifications, modifications may be required. Any work over $5,000 requires a South Carolina Licensed Marine Contractor under SC Code 40-11-410, Section 4D. Budget $325 for the application fee and a realistic estimate for any remediation work the dock may need to pass current specs.

2025 Permit Fees

Effective January 1, 2025, Santee Cooper implemented its first fee increase since 2009. The 2025 schedule: $325 for residential water-based permits, $500 for commercial. Payment must accompany the application by check payable to Santee Cooper. Fees are evaluated every three years going forward — the next scheduled review is 2028. The $325 residential fee covers the permit application processing; it does not include any contractor fees, inspection costs, or modification work. For large, complex dock structures the total cost to achieve a permitted, compliant dock from the day you close may be materially higher than $325.

Construction Specifications Under SAC-RGP #43

The following specifications are taken directly from Santee Cooper's 2025 Water-Based Permit Application, SAC-RGP #43 (Docks and Boat Lifts). These apply to all dock construction on Lake Marion.

Pier Width

Piers in Clarendon, Calhoun, Sumter, and Orangeburg counties: maximum 6 feet wide. Piers in Berkeley County: maximum 4 feet wide (coastal zone requirement). The pier width limit is measured for the full walkway, not just the terminal. Piers that exceed these widths will not be permitted.

Terminal Platform

The "T" or "L" terminal at the end of the pier may not exceed 24 feet wide by 16 feet long. The terminal may be covered — roofs must be gabled or hip style, no flat roofs. Roof height maximum: 13 feet from decking to peak, or 15 feet from the maximum high-water surface to peak. Pier walkways may not be covered at any point — only the terminal platform may have a roof.

Fixed Dock Height

All fixed docks must be built with the deck surface at least 2 feet above the maximum high-water line of the lake. This matters on Lake Marion because the pool fluctuates seasonally (roughly 75.5 ft MSL in summer, 72 ft in winter). A dock built to be at water level at summer pool will be non-compliant. Floating docks or adjustable gangways handle the seasonal range more gracefully.

Setbacks and One-Pier Rule

Piers must be set back a minimum of 10 feet from adjacent property lines, measured to the imaginary lakeward extension of those lines. Single-family residential lots are limited to one pier. No exceptions are made for larger lots unless adjacent property owners provide written consent. Mooring structures (dolphins, pilings, buoys) may not be located more than 20 feet laterally from the pier; maximum two per property.

Materials

Creosote-treated wood is prohibited on all structures. Flotation devices on floating docks must be encased or fully encapsulated — open Styrofoam billets, barrels, or similar exposed foam devices are not permitted. White reflective tape or white reflectors are required on the outermost waterward corners of the pier and at 20-foot intervals along both sides of the pier length. Handrails may be installed at maximum 3 feet high, with 2" x 2" pickets on 6" centers; sides may not be enclosed in a way that blocks cross-vision.

Boat Lifts

Covered boat lifts: maximum 16 feet wide by 30 feet long, gabled or hip roof only (no flat roofs), roof height maximum 13 feet from decking or 15 feet from water surface. Uncovered lifts: the bottom of the boat when fully raised may not exceed the height of the pier decking; maximum total lift height 13 feet above high-water line. Personal watercraft (jet ski) lifts: permitted, maximum two per lot.

How to Apply

Download the current 2025 Water-Based Permit Application from santeecooper.com under Property Management. Complete all fields — incomplete applications are returned. Include: a $325 check payable to Santee Cooper; a drawing showing the structure with all dimensions and property line extensions into the water; and the names and addresses of both adjacent property owners (available from the county tax office). If adjacent owners sign the drawing acknowledging the proposed activity, the two-week public notice period is waived. Mail to: Santee Cooper Property Management, 1 Riverwood Drive, P.O. Box 2946101, Moncks Corner, SC 29461.

For inspection and compliance questions, the Santee Cooper contact is William Umphlett, Manager, extension 4682, wdumphlett@santeecooper.com. For Berkeley, Clarendon, and Sumter County properties: Joshua Brown, Land Agent, extension 5230, josh.brown@santeecooper.com. Main property management line: 843-761-4068.

Shoreline Stabilization: SAC-RGP #44

Riprap placement, retaining walls, bulkheads, and groin walls require a separate Santee Cooper permit under SAC-RGP #44. Riprap must receive prior Santee Cooper approval and consist of clean stone or masonry free of pollution sources. Retaining walls and groins may be constructed of treated wood, concrete, or vinyl sheeting with prior Santee Cooper approval. Bank stabilization may not exceed 500 feet of shoreline per permit. Earthen fill that expands the property beyond its original footprint will not be permitted — the purpose is erosion prevention, not land recapture. Dredging and excavation fall under SAC-RGP #45; contact Santee Cooper Property Management directly for dredging questions.

What Happens Without a Permit

Santee Cooper inspects the lake system and identifies unpermitted structures. Structures placed on Santee Cooper project waters without a permit are subject to required removal at the owner's expense. The cost of forced removal typically exceeds the cost of the permit process significantly. Unpermitted structures also create complications when the property sells — a buyer's attorney performing thorough due diligence will find the unpermitted status, which can affect the transaction. If you purchase a property and discover the dock was never permitted or has lapsed, initiate the permit process immediately rather than waiting.

Buyer Due Diligence Checklist

Before closing on any Lake Marion lakefront property with a dock: request the current Santee Cooper permit number and confirm it is active and in the seller's name; request the original application drawings and compare them to the actual dock dimensions; hire a licensed marine contractor to inspect the dock against SAC-RGP #43 current specifications; confirm no outstanding violations or compliance orders exist on the property; budget $325 for your own permit application; allow adequate time after closing for the permit process before modifying or substantially using the dock. Contact Santee Cooper before closing, not after, if there are questions about a specific dock's compliance status.