158 Miles of Pipe, and Nobody Has Ever Graded All of It. Mt. Juliet Just Hired Someone To.
Somewhere under Mt. Juliet there is a network of pipe long enough to stretch from the city limits to Chattanooga, and until now nobody has walked all of it with a clipboard. That is about to change.
On September 14, the Mt. Juliet Board of Commissioners voted unanimously to hire Civil & Environmental Consultants to survey the city's entire storm drainage system, grade the condition of every piece of it, and turn the results into a digital map the city can plan against for years. It is not a ribbon-cutting kind of vote. It may turn out to be one of the more useful things the commission does all year.
What is actually down there
The city's own bid documents lay out the starting count, and it is bigger than most residents would guess. Mt. Juliet currently tracks about 52.4 miles of storm pipe inside public right-of-way and another 105.9 miles outside it — roughly 158 miles in all. On top of that are 2,556 catch basins (398 along public streets, 2,158 elsewhere) and 3,077 headwalls, the concrete ends where pipe meets ditch or creek. City staff wrote plainly that they expect every one of those numbers to go up once someone actually goes looking.
That is the point of the job. Mt. Juliet was incorporated in 1972 and has spent the last two decades growing faster than almost any city in Tennessee — a 2023–24 special census counted 40,289 residents, and the Census Bureau's July 2024 estimate put the figure at 44,066. Much of the drainage underneath that growth was built one subdivision at a time, by different developers, to different standards, and recorded in different ways.
A report card for every pipe
The survey is unusually specific. For every pipe, catch basin, headwall and junction box, the consultant is expected to record the location by latitude and longitude, its elevation, material, size and length, the direction water flows through it, whether it sits inside or outside public right-of-way, and at least one photograph. Pipes get video inspection, and that footage becomes its own searchable database.
Each asset then gets a simple grade on a four-point scale:
- 1 — good condition
- 2 — needs cleaning and light maintenance
- 3 — needs repair
- 4 — needs complete replacement
The final product is a written report with a table sorting every asset into those four buckets, plus a color-coded map, delivered in a format that plugs straight into the city's existing ArcGIS system. The bid terms give the contractor eight months from award to finish. Private water-quality features such as retention ponds, bioretention beds and pervious pavement are left out; this is about the pipe.
Why it matters on your street
Mt. Juliet created its stormwater utility in November 2022, with city leaders saying at the time that it was meant to start addressing long-standing flooding problems and keep the city in line with federal and state Clean Water Act requirements. The state designates Mt. Juliet as a small municipal separate storm sewer system, which carries its own permit obligations.
A utility, though, can only fix what it can see. A full inventory with condition grades is what lets public works stop reacting to the next backed-up drain and start building a repair list in order of need — and put real numbers behind future budget requests.
It also lands in the middle of a bigger conversation about who pays for the infrastructure new growth requires. On November 3, voters decide whether to repeal the city's home rule charter, which city leaders have described as the route to charging developers impact fees. Our explainer, Fourteen Cities Have It. On November 3, Mt. Juliet Decides Whether to Give It Up., walks through that question. For a map of which office handles what, see our resident's guide to Wilson County and Mt. Juliet government.
Residents with a drainage concern can reach Mt. Juliet Public Works at City Hall, 2425 N. Mt. Juliet Road, or by phone at 615-754-2552.
