STORM DRAINS & CULVERTS · LAKE OCONEE & SINCLAIR
Get a free estimate
or call (678) 863-5620The short answer
Storm drain installation is building the inlets, pipe and outlets that collect surface runoff and carry it to a safe release point. In Georgia, culverts under state-route driveways need a GDOT permit and 18-inch minimum pipe, and on Lake Oconee, Georgia Power bars drainage pipe from crossing its land; pipes must end at the boundary.
Reviewed by A Class Septic Services · Last updated
Who does the work
One crew, raw ground to a working system
Key facts
Each row links to the agency, code or publisher it comes from. Tap a source to check it yourself.
| Topic | What it says | Source |
|---|---|---|
| Pipe across Georgia Power land | Not permitted on Lake Oconee; drainage pipes must stop at the project boundary and transition to swales, French drains or dry creek beds. | Georgia Power — Lake Oconee Shoreline Guidelines (2026), 2026 |
| Driveway culvert on a state route | Permit required before work in the right-of-way; minimum 18-inch side drain pipe; designed for the 25-year storm. | Georgia DOT — Regulations for Driveway and Encroachment Control (2003 edition, revised October 10, 2009), 2009 |
| Residential culvert material (state right-of-way) | Corrugated metal pipe, concrete, or GDOT Std. 1030P HDPE if the Area Engineer approves. | Same source as above |
| Drainage structures in the 25-foot stream buffer | Allowed without a variance when adequate erosion control measures are part of the plan and installed. | GSWCC Model Soil Erosion, Sedimentation and Pollution Control Ordinance (revised June 2016), 2016 |
| Storm water into sanitary sewer | Prohibited; storm water shall not be drained into sewers intended for sewage only (plumbing code 1101.3). | Georgia State Minimum Standard Plumbing Code 2018, Chapter 11 Storm Drainage (UpCodes), 2018 |
| Roof water and septic | Keep roof drains, sump pumps and other rainwater drainage away from the drain field. | US EPA — How to Care for Your Septic System |
| Typical storm drain cost | $500 to $3,500 (typical market range, LawnStarter, 2026). | LawnStarter — How Much Does a French Drain Cost in 2026? (updated October 5, 2026), 2026 |
| Typical catch basin project | $2,500 to $5,000 complete (typical market range, Fixr, 2025). | Fixr — French Drain Installation Cost (updated January 31, 2025), 2025 |
Plain definitions
The whole story
Water on a lake lot always runs toward the lake, and that is exactly what the rules are built around. Georgia Power's Lake Oconee guidelines say drainage pipes, regardless of origin, may not run across its property or project boundary; a pipe has to terminate at the boundary and hand the water off to a swale, a French drain or a dry creek bed. A storm drain that worked on an inland lot, piped straight to the water's edge, is not allowed here.
The soils make the problem worse. NRCS maps Wilkes soils on 10 to 25 percent slopes across tens of thousands of acres of the Baldwin, Jones and Putnam survey area, and the Piedmont clays under most lake lots shed water instead of soaking it in. Runoff from a roof, a long drive and a sloped lawn gathers speed fast, and every gallon that reaches the lake carries some of your yard with it.
Septic systems complicate the layout. A drain field is a soil treatment area that only works when it is not flooded, so the U.S. EPA tells owners to keep roof drains, sump pumps and other rainwater drainage away from it. On a lake lot where the house, drive and drain field share a narrow strip between road and water, a storm drain often exists mainly to steer water around the field.
How the job runs
We trace where water comes from and where it collects: roof valleys, driveway low spots, a neighbor's ditch. Gullies, silt fans and stained siding show the paths even on a dry day.
On lake lots the outlet stops before Georgia Power land and spreads water into a swale, French drain or dry creek bed. Elsewhere it can tie into a roadside ditch, a natural drainage way, or a municipal storm system where the owner allows it, never into a sanitary sewer.
A driveway culvert in a state-route right-of-way needs a GDOT permit before work starts; county roads follow the county road department's own process.
Inlets and pipe trenches are mechanized digging, so locates come first and the tolerance zone is respected.
Georgia 811 — Georgia Utility Facility Protection Act (O.C.G.A. 25-9) summary
Catch basins are set flush to finished grade and pipe is laid with steady fall to the outlet so it scours itself instead of silting up.
Where pipe discharges, a riprap apron on filter fabric spreads and slows the flow. Without it the outlet becomes the start of a new gully.
GSWCC Field Manual for Erosion & Sediment Control in Georgia (2016 edition)
Trenches and basin cuts are mulched or seeded so the drainage work does not become an erosion source itself.
GSWCC Field Manual for Erosion & Sediment Control in Georgia (2016 edition)
Permits & the Georgia rules
State routes: apply to the GDOT District Area Office for a residential driveway permit before placing a culvert in the right-of-way.↗
Inside the 25-foot state waters buffer: a drainage structure may be built without a variance only if erosion control measures are in the plan and installed.↗
Water or sewer line crossings of a buffered stream are exempt when they cross within 25 degrees of perpendicular and disturb no more than 50 feet of buffer.↗
Lake lots: confirm with Georgia Power's lake resources office before any work on or near project land.↗
Georgia rule GDOT Driveway Regs., Ch. 2
“A permit is required prior to performing any construction work or non-routine maintenance within the State Highway Right-of-Way.”
Georgia rule Georgia Power, Lake Oconee
“Drainage pipes, regardless of origin, are not permitted to run across GPC property/project boundary.”
Georgia rule GA Plumbing Code 1101.3
“Storm water shall not be drained into sewers intended for sewage only.”
What it costs
Storm drain
$500–$3,500
per drain
Typical market range — LawnStarter — How Much Does a French Drain Cost in 2026? (updated October 5, 2026), 2026
Catch basin, complete project
$2,500–$5,000
per project
Typical market range — Fixr — French Drain Installation Cost (updated January 31, 2025), 2025
Coupling a drain line into an existing storm basin
$100–$200
per connection
Typical market range — Fixr — French Drain Installation Cost (updated January 31, 2025), 2025
Dry well
$1,500–$5,000
per well
Typical market range — Fixr — French Drain Installation Cost (updated January 31, 2025), 2025
Figures are third-party typical market ranges, not A Class Septic Services prices. Estimates from us are free.
Free estimate: (678) 863-5620Your options
OPTION 01
When it fits: Water is on the surface: puddles at the bottom of a drive, downspout discharge, a low corner that collects sheet flow.
OPTION 02
When it fits: Water is in the ground: a soggy lawn that never dries, seepage at a foundation, a wet slope.
OPTION 03
When it fits: The ground itself slopes the wrong way, toward the house or onto the drain field.
Warning signs
Water going the wrong way? Call (678) 863-5620
Where we do this
FAQ
Straight answers, with the rule or record behind them. Still unsure? Call and ask the crew that digs.
(678) 863-5620If the driveway meets a state highway, yes: GDOT requires a permit before any construction in the state right-of-way, residential driveway applications go to the District Area Office, and side drain pipe must be at least 18 inches. On a county road, check with the county road department, which sets its own size and permit rules.
No. Georgia Power's Lake Oconee guidelines say drainage pipes of any origin may not run across its property or project boundary. The pipe has to end at the boundary and transition to a swale, French drain or dry creek bed that slows and spreads the water before it reaches the lake.
Source: Georgia Power — Lake Oconee Shoreline Guidelines (2026)
No. Georgia's plumbing code says storm water shall not be drained into sewers intended for sewage only, and a septic system is just as off-limits for roof water. The U.S. EPA advises keeping roof drains and sump pumps away from the drain field, because extra water slows or stops treatment.
Source: Georgia State Minimum Standard Plumbing Code 2018, Chapter 11 Storm Drainage (UpCodes)
A storm drain collects water on the surface through a grate and moves it through solid pipe. A French drain is a gravel-filled trench with perforated pipe that collects water from the soil. Catch basins handle heavy surface flow; French drains handle soggy ground. Many lots use a catch basin feeding a solid line plus a French drain where the ground stays wet.
Source: Fixr — French Drain Installation Cost (updated January 31, 2025)
National cost guides put a storm drain at about $500 to $3,500 (LawnStarter, 2026) and a complete catch basin project at $2,500 to $5,000 (Fixr, 2025). The total for your property depends on the number of inlets, the length of pipe to a legal outlet, rock in the trench, and what has to be restored afterward.
Source: LawnStarter — How Much Does a French Drain Cost in 2026? (updated October 5, 2026)
It depends on the ditch's drainage area and the road. On Georgia state routes the minimum side drain pipe is 18 inches, and driveway side drains are designed for the 25-year storm. A culvert sized for a dry week will back up in a summer thunderstorm, so we size to the ditch, not the pipe that was there.
Georgia keeps a 25-foot buffer along state waters, but the erosion control ordinance allows a drainage structure in the buffer without a variance if adequate erosion control measures are in the plans and installed. The buffer rules also exempt utility line crossings that are close to perpendicular and disturb no more than 50 feet of buffer.
Source: GSWCC Model Soil Erosion, Sedimentation and Pollution Control Ordinance (revised June 2016)
Keep going
Drainage & Erosion Control
Sources
Rules, costs and local facts on this page link to the agency, code or publisher that states them. Cost figures are third-party market ranges, not our prices — estimates are free.
Reviewed by A Class Septic Services · Last updated
Ready when you are
Surface water has to go somewhere, and on a lake lot the somewhere is regulated. We install inlets, pipe and culverts that collect runoff and release it where it will not wash out your drive, flood your drain field or dump silt in the cove.
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or call (678) 863-5620