The 1,085-foot line on Lake Lanier: what it means for a lake lot

Buyers looking at Lake Lanier lots around Flowery Branch hear about three lines: full pool, the Corps boundary and the 1,085 line. They are often mixed up, and they control different things. This guide takes them one at a time and ends with questions for your surveyor.

Line one: full pool and the water you see

Lake Lanier's full level is 1,071 feet above mean sea level. The Corps' recorded extremes are a high of 1,077.2 feet in April 1964 and a low of 1,050.79 feet in December 2007. (U.S. Army Corps of Engineers (archived page), checked 2026-10-19)

The Corps says Lake Lanier's water level will periodically fluctuate as it balances hydropower, flood control, navigation, water supply, recreation and fish and wildlife needs. (U.S. Army Corps of Engineers (archived page), checked 2026-10-19)

Full pool is a reference level, not a promise about the waterline. On the day you visit, the water can sit above or below it, and the recorded extremes show how far apart the highs and lows have been. Do not buy on a water depth you saw once, and do not rely on anyone’s description of the depth at the shore.

Full pool is also the reference the Corps uses for its own shoreline rules. Even the dock standards are measured against it:

The plan requires boat-mooring sites to have six feet of water under the lakeside or slip end of the dock at full pool. (U.S. Army Corps of Engineers (archived page), checked 2026-10-19)

So when a survey, a permit or a plan mentions an elevation, ask which line it is measured from. Full pool and the 1,085 line are both elevations above mean sea level, and on a sloping lot they can sit some distance apart.

Line two: the Corps boundary

The Shoreline Management Plan says the United States (the Corps) owns most of the land around Lake Lanier outright, in fee title. (U.S. Army Corps of Engineers (archived page), checked 2026-10-19)

Private property lines do not extend onto Corps land. Owning the adjoining lot gives no extra rights on government property, no privacy guarantee and no exclusive use of the shoreline. (U.S. Army Corps of Engineers (archived page), checked 2026-10-19)

This is why “lakefront” around Lanier usually means a lot that adjoins Corps land, not a lot that runs to the water. Between your lot line and the shore there is often a strip of public property. What can happen on it, from a cleared path to a dock, is the Corps’ decision, and nearly all of it needs a permit first.

Work on Corps property needs a permit first. The Corps lists clearing trees and understory, planting non-native or ornamental plants, placing unpermitted items such as swings, picnic tables, benches, sheds or boat trailers, and grading among prohibited acts. Violators face fines of up to $5,000, up to six months' imprisonment, restoration costs or permit revocation. (U.S. Army Corps of Engineers (archived page), checked 2026-10-19)

Line three: the 1,085-foot contour

When Buford Dam was built, a maximum flood elevation of 1,085 feet above mean sea level was set. Where that line fell on private land, the government bought flowage easements. That land stays private, but owners may not build habitable structures on it or alter its contour. All purchased easements are recorded. (U.S. Army Corps of Engineers (archived page), checked 2026-10-19)

Put plainly, on a lot with a flowage easement the ground below that contour is yours, but the government holds rights over it. Three limits matter most to a buyer.

• No habitable structures. A house, a guest suite or anything else built for people to live in cannot go below the line.
• No changes to the contour. Grading, fill and other work that reshapes the ground below the line alter its contour.
• No new septic systems below the line, under health rules that apply whoever owns the land.

The plan says health officials around Lanier prohibit new septic systems below the 1,085-foot contour regardless of who owns the land. Septic systems are not permitted on public land below 1,085 feet. (U.S. Army Corps of Engineers (archived page), checked 2026-10-19)

Notice that the record high in the Corps’ figures sits below the 1,085 line. The line was set as a maximum flood elevation when the dam was built, not as a level the lake reaches in a normal year. Its force on a lot comes from the recorded easement, so a dry year does not loosen it.

How this differs from a FEMA flood zone

FEMA's Flood Map Service Center (msc.fema.gov) is the official public source for National Flood Insurance Program flood hazard information. Buyers can search an address there to find the effective flood map. (FEMA, checked 2026-10-19)

The FEMA flood map and the 1,085 line are separate tools with separate purposes. One does not answer the other, so check both for any lot near the water or near a creek.

Why it matters for a purchase

The easement can shape a lot more than the listing suggests. On a steep lot, much of the lower ground may sit below the line, which limits where a future addition or a replacement septic system could go. Where a house, deck or outbuilding already stands close to the line, the question is what, exactly, sits below it, and whether the survey shows that clearly.

Walk the lower part of the lot at the showing with those limits in mind. Retaining walls, terraces, fill and steps cut into the slope are worth asking about, both below the 1,085 line on your side of the boundary and on the Corps land beyond it. If you see benches, swings, a shed or a cleared view on the public side, ask the seller whether the Corps approved them in writing, because the Corps lists those items among the acts that need a permit first. A sale does not turn unapproved work into approved work.

Reading the survey

Ask for a survey that labels the 1,085 contour, the full-pool line and the Corps boundary by name, with a date and the surveyor’s source for each. A drawing that shows only “lake” at the bottom of the lot does not answer the questions below.

The easement is also separate from a dock. Whether a dock can sit on the Corps land in front of the lot is a permit question, and a permit held by the seller ends with the sale: see what happens to the dock permit at closing and our dock permit guide.

Questions to ask your surveyor

1. Where does the 1,085-foot contour fall on this lot, and can you show it on the survey?
2. Is there a recorded flowage easement on this parcel, and where is it recorded?
3. Where is the Corps property boundary in relation to the lot line and the contour?
4. Does any part of the house, deck, outbuilding or driveway sit below the contour?
5. Where are the septic tank and drain field, if the home has them, relative to the contour?
6. Is there any sign that the ground below the contour has been regraded, filled or walled?

Then ask your closing attorney to confirm the easement in the title work, and take anything on the public side of the boundary to the Corps’ Lake Lanier office.

The Corps tells lakefront owners to get permits from the Lake Lanier Project Management Office before doing any work on public property. That office also handles dock, riprap and small silt-removal permits. The Shoreline Management Help Desk number is 770-904-3262. (U.S. Army Corps of Engineers (archived page), checked 2026-10-19)

Questions buyers ask

Next step: run the lot through our due-diligence checker and bring the survey questions to your first showing. To see what is on the market now, browse Flowery Branch homes for sale on Gold Peach Realty.

Written by the Flowery Branch Homes Editorial Team. AI tools help us draft; people check every fact before it publishes.

Rules, rates and maps change. Every rule on this page links to the office that sets it; confirm with that office before you rely on it.