Rain Barrels and Rain Gardens in Gallatin

Rain barrels capture roof runoff for later outdoor use, while rain gardens are shallow planted areas that slow, filter and absorb stormwater. In Gallatin, these practices can help reduce runoff reaching the city’s stormwater system, nearby creeks, the Cumberland River and Old Hickory Lake. Start by checking your downspouts, locating underground utilities, keeping water away from foundations and selecting Tennessee-adapted plants. For questions about public drainage, permits or work affecting streets and easements, contact the City of Gallatin Engineering Division at 615-451-5965. [cite:city-of-gallatin-stormwater,city-of-gallatin-engineering]

Rain barrels and rain gardens are two practical ways to slow stormwater where it falls. A rain barrel stores water from a roof for later outdoor use. A rain garden is a shallow, planted depression that temporarily holds runoff and allows it to filter through soil and soak into the ground.

For Gallatin residents, the distinction matters because stormwater does not go to a wastewater treatment plant. The City says runoff can travel directly to the Cumberland River, Old Hickory Lake and other nearby water bodies. Runoff can also carry sediment, oil, pet waste, trash, yard debris and lawn chemicals.

The best choice depends on your property:

If you want to… — Consider… — Main benefit — Watch for…

Store water for flowers, vegetables or landscape plants — Rain barrel — Reuses roof runoff later — Overflow, mosquito prevention, stable installation and safe water use

Slow and filter runoff on site — Rain garden — Holds and infiltrates water while supporting plants — Poor drainage, foundation problems, utilities and unsuitable soil

Handle a larger or more complex drainage problem — Professional design or engineered stormwater measure — May provide more capacity and controlled overflow — Permits, plans, easements and agency review may apply

What rain barrels and rain gardens do in Gallatin

The City of Gallatin operates a Phase II Municipal Separate Storm Sewer System program designed to address stormwater quality and quantity. Its stormwater program includes public education, illicit-discharge detection, construction runoff, post-construction stormwater management and pollution prevention. The City also encourages residents, developers, businesses and visitors to reduce their contribution to stormwater pollution.

A rain barrel primarily provides temporary storage and reuse. It can capture roof runoff during a storm and make that water available later for outdoor, non-potable uses such as watering ornamental plants. Rainwater collected in a typical residential barrel should not be treated as drinking water unless it is processed through an appropriate water-treatment system.

A rain garden primarily provides infiltration and filtration. EPA describes it as a depressed landscape area that collects runoff from a roof, driveway or other surface and lets it soak into the ground. Rain gardens can also filter some pollutants and provide habitat for pollinators and other wildlife.

Neither feature is a substitute for correcting a failing public drainage system, a blocked culvert or a serious foundation-water problem. Gallatin says the City maintains public stormwater infrastructure in public rights of way and easements, while property owners generally remain responsible for stormwater facilities and problems on private property.

How to install a rain barrel safely

A rain barrel can be a manageable first project for a homeowner, school garden or community garden. Use this checklist before placing one under a downspout:

1. Choose a suitable downspout. Select a location where the barrel can sit on a firm, level base and where overflow can be directed away from buildings and neighboring property.
2. Use a secure, covered container. A screen or sealed top helps keep leaves, debris and mosquitoes out. The container should not be accessible to young children.
3. Raise the barrel only on a stable platform. A full barrel is heavy. Do not place it on loose blocks, an unstable slope or a structure that could tip.
4. Plan the overflow before the first storm. Connect an overflow hose or diverter and send excess water to a planted area, lawn or other location where it can safely infiltrate.
5. Use the stored water regularly. Emptying the barrel between rain events creates storage for the next storm and reduces the chance of stagnant water.
6. Keep the water outdoors and non-potable. Use it for appropriate landscape purposes unless a qualified professional designs and verifies a treatment system.

EPA identifies rain barrels and cisterns as rainwater-harvesting systems that collect roof runoff for later reuse.

A rain barrel is usually most useful when paired with a safe overflow area. If the barrel fills quickly and the overflow simply runs toward a foundation, driveway or eroding slope, the installation may shift the problem rather than solve it.

How to plan a rain garden

Choose the location

Start by watching your property during and after a moderate rain. Look for runoff leaving a downspout, flowing across a driveway or collecting in a shallow low spot. EPA recommends considering underground utilities before digging and avoiding locations where water could reach a basement or crawl space.

Keep the garden away from building foundations, septic systems and buried utility lines. The exact setback depends on the site, construction and local requirements, so call 811 and investigate the property before excavation. Do not redirect water onto a public street, neighboring lot or drainage feature without confirming that the plan is appropriate.

A rain garden should not be designed as a permanent pond. Tennessee Smart Yards describes rain gardens as planted depressions designed to catch and soak in runoff, while EPA describes them as areas that temporarily hold water and allow infiltration.

Test the soil and plan overflow

Gallatin properties can have different slopes, soil textures and drainage conditions. Before building a large garden, test how quickly water drains from the proposed area. If water remains for a long time, the site may need a different design, amended soil, an underdrain or professional advice.

EPA guidance for rain gardens emphasizes evaluating soil permeability and ensuring that the garden can drain within a reasonable period after rainfall.

Plan an overflow route for storms larger than the garden’s capacity. The overflow should move water away from structures without causing erosion. A shallow, stabilized swale or properly placed outlet may be appropriate, but larger grading or drainage projects can involve local or state review.

Select Tennessee-adapted plants

Tennessee Smart Yards, an Extension-led program associated with the University of Tennessee Institute of Agriculture and UT-TSU Extension, publishes a Tennessee native rain-garden plant guide. It notes that native plants commonly found along streambanks or wetlands can thrive when matched to the site’s moisture and sunlight conditions.

Use a mix of plants rather than choosing only one species. Match plants to:

• Full sun, partial shade or shade
• Frequently wet, occasionally wet or mostly dry conditions
• Mature height and spread
• Bloom time and seasonal appearance
• Maintenance needs around paths, play areas and school buildings

The Tennessee Smart Yards plant recommendations include options such as bee balm, great blue lobelia, black-eyed Susan, rough-leaf goldenrod, buttonbush and American beautyberry, but the right selection depends on the specific location.

A Gallatin stormwater checklist

For homeowners

• Inspect gutters and downspouts before redirecting water.
• Keep discharge away from foundations, sidewalks and neighboring property.
• Call 811 before digging.
• Do not place a rain garden over a septic system or buried utility.
• Use mulch and dense plantings to reduce erosion.
• Keep leaves, grass clippings, fertilizer, oil and pet waste out of streets and storm drains.
• Photograph the site during rain so you can understand the direction and volume of runoff.

For schools and youth programs

A rain barrel or small demonstration rain garden can support lessons about the water cycle, soil, plants and local watersheds. Choose a location with safe student access, stable surfaces, visible overflow control and a maintenance plan. The project should have an adult owner responsible for inspections, emptying stored water and keeping outlets clear.

For gardeners

Use rainwater for appropriate outdoor irrigation, but do not assume collected water is potable. Select plants for the actual moisture conditions rather than placing plants that prefer constantly wet soil in a garden that dries quickly. Tennessee Smart Yards also provides a native-plant database and rain-garden resources for Tennessee landscapes.

When to contact the City of Gallatin or Tennessee agencies

Contact the City of Gallatin Engineering Division if your question concerns public drainage, a roadway, a public right of way, a drainage easement, stormwater infrastructure or a project requiring city engineering review. The City lists Engineering at 633 Long Hollow Pike, Gallatin, Tennessee 37066, with a phone number of 615-451-5965.

The City’s stormwater documents page includes its stormwater ordinance, annual municipal stormwater reports, construction checklists, post-construction maintenance materials and a brochure for landscapers, homeowners and gardeners.

For construction, grading or development work, do not assume that a project is equivalent to a small residential rain garden. Tennessee’s stormwater program includes construction permits and municipal stormwater requirements. TDEC also explains that altering a stream, wetland or other water resource may require an Aquatic Resource Alteration Permit or related certification.

A simple next-step plan

1. Walk the property after rain and identify where runoff begins and where it goes.
2. Start with the smallest practical intervention: a properly secured rain barrel, downspout extension or planted infiltration area.
3. Check utilities, foundations, septic limitations, easements and HOA rules before digging.
4. Use Tennessee Smart Yards resources to select plants suited to the site.
5. Plan overflow and maintenance before installation.
6. Contact Gallatin Engineering before work involving public drainage, rights of way, easements, substantial grading or construction plans.

Rain barrels and rain gardens will not eliminate every drainage problem, but they can help Gallatin residents keep more rainwater on site, reduce runoff pollution and create more useful, resilient landscapes.