Minnesota · Open territory
Sewer Pipe Lining in Minnesota
Minnesota's frost line runs five feet and deeper, which puts every sewer lateral in the state at the bottom of a trench nobody wants to dig in January. This page covers what fails under Minneapolis, St. Paul and the rest of the state, why the Twin Cities' century-old clay and the suburbs' Orangeburg are the two recurring problems, who owns the pipe, and how it gets rebuilt from inside.
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What is in the ground in Minnesota
The median Minnesota home dates from the mid-1970s, but Minneapolis and St. Paul, Duluth, Rochester, St. Cloud and the river towns were built between 1880 and 1930 on vitrified clay pipe jointed every two or three feet, laid deep to clear the frost and connected, in the Twin Cities, to sewers that were combined until the separation programs of the 1980s and 1990s. The first-ring suburbs that filled after the war, in Richfield, Edina, Bloomington, Roseville, Crystal, Columbia Heights and the Duluth and Rochester rings, used clay, concrete and a lot of Orangeburg, the bituminized fiber pipe of the era, through the 1950s and 1960s, with cast iron under every basement floor. Basements are universal and deep, so the lateral leaves well below grade and runs eight to fourteen feet down to the main, which makes an open trench a braced, two-day excavation and lining from the basement cleanout the obvious alternative. Houses built since the mid-1970s have PVC laterals, which fail at a fitting or where frost has worked a joint apart.
Soil, water and weather
Minnesota ground is glacial till and lake-bed clay, dense and poorly drained, with sand and gravel outwash in the central and northern counties. The frost line is the deepest in the lower forty-eight, five feet across the south and six or more toward the Canadian border, so laterals are set deep and the ground above them freezes solid for four or five months; a shallow or disturbed joint heaves every winter, and a frozen lateral in a house left cold is its own emergency. Spring thaw, with the snowmelt and the rains that follow, is the season of basement backups: groundwater infiltrates every open joint, sump pumps and footing drains that were ever cross-connected flood the sanitary system, and the Metropolitan Council's inflow-and-infiltration surcharge program has pushed Twin Cities communities to inspect and require repair of private laterals that leak. Roots from the elms, silver maples, ash and basswood planted along every older street fill clay joints as reliably as anywhere.
What shows up on Minnesota camera inspections
- Roots from elms, silver maples, ash and basswood in the joints of century-old clay laterals in Minneapolis, St. Paul and Duluth
- Orangeburg fiber pipe collapsing under 1950s-60s subdivisions in Richfield, Edina, Bloomington, Roseville and the suburban rings
- Laterals eight to fourteen feet deep below basement floors, the deepest residential sewers in the country
- A five-foot frost line that heaves shallow joints and ends the digging season in November
- Spring-thaw basement backups from groundwater infiltration and cross-connected footing drains
- Point-of-sale and inflow-and-infiltration lateral inspection programs across the Twin Cities suburbs
Which trenchless method fits
The camera decides. A line that still holds its shape is a lining job; a line that has been crushed, has lost its slope or has collapsed is a replacement job; a single bad joint in an otherwise sound run is a spot repair. Here is what each one does and where it stops being the right tool.
Sewer Pipe Lining (CIPP)
A resin-saturated liner cured inside the old sewer becomes a jointless new pipe, installed from a cleanout or manhole with nothing dug up.
Best for: Root-filled clay joints, scaled cast iron under a slab, cracked concrete or Orangeburg that still holds its shape, and any line under hardscape, a building or a mature tree.
Pipe Bursting
A bursting head splits the old pipe underground and pulls a new fused polyethylene line in behind it, between two small pits.
Best for: Crushed, deformed or collapsed pipe, severe offsets, undersized lines that need a larger diameter, and Orangeburg that has gone oval.
Sectional Point Repair
A short liner, two to twelve feet long, cured over one defect, leaving the sound pipe on either side alone.
Best for: One cracked joint, one offset, one root intrusion or one leaking connection in an otherwise sound line.
Storm Drain Lining
Cured-in-place and spin-cast lining for corrugated metal, concrete and clay storm pipe, culverts and roof drains, without closing the road or the parking lot.
Best for: Corrugated metal pipe rusted through at the invert, concrete storm lines with open joints, roof drains and parking lot drainage under slabs.
Who owns the pipe, and who issues the permit
Across Minnesota the property owner is the one who owns and keeps up the sewer service line from the house to the public main, and that includes the portion under the boulevard and street; Minneapolis, St. Paul Regional Water Services and the city's Public Works, Duluth, Rochester Public Utilities and the Metropolitan Council member cities all work that way. The work takes a plumbing permit from the city pulled by a Minnesota-licensed plumber, and most cities add a sewer permit and an inspection of the connection; any pit in the right-of-way needs a right-of-way obstruction or excavation permit; and Gopher State One Call must be notified before any excavation. Many Twin Cities suburbs now require a sewer lateral inspection at the point of sale or as part of their inflow-and-infiltration programs, and nearly all will sign off on a lined lateral as long as they can see the connection on camera. Lining from the basement avoids the deepest trench in the country and the frost that sits on top of it.
Finding a lining contractor in Minnesota
Minnesota does not yet have a verified installer listed on this site, which is why the number on this page rings the national line. Call it or send the form with the property address and what the camera or the symptoms are showing, and we will locate a qualified trenchless contractor near you and make the introduction; there is no charge for that. If you are a Minnesota lining contractor with five or more years in business and a strong Google rating, the territory is open: apply to be listed.
Estimates are free. Call now. (855) 804-1434
Where lining is in demand across Minnesota
The pipe problems described above are concentrated in the older cities and the postwar suburbs around them. The communities below are the ones Minnesota property owners ask about most, and the same methods apply everywhere in between.
A straight answer about your Minnesota sewer line
Nowhere does the math lean harder toward lining than Minnesota: the lateral sits deeper than almost anywhere, the frost sits on top of it for five months, and the season for digging is short. The only thing left to settle is whether the pipe can take a liner. Clay that has kept its round section does, even with roots at every joint; Orangeburg that has gone oval cannot be inverted through. A camera settles that in an hour, fixes every defect to a surface point with its depth and leaves you the video, and the proposal that follows lays out the method, the length of run, the cost and the reasons each other option was passed over.
Estimates are free. Call now. (855) 804-1434
How a job runs
Camera first. Always.
A sewer quote given without video is a guess, and guesses are how homeowners end up paying for a liner that was never going to fix the problem. Here's the sequence we follow on every job.
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Step 1
Camera inspection, recorded
A self-leveling camera runs the full line from the cleanout, manhole or roof drain to the main. Every crack, offset, root mass, belly and connection is logged with its distance, and a locator marks each one on the surface with its depth. You get the recording.
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Step 2
Cleaning to bare wall
A hydro jetter, with chain cutters or a descaler where cast iron or roots call for them, strips the pipe to its original surface. The camera goes through again afterward, because a cleaned pipe tells the truth about its condition in a way a dirty one cannot.
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Step 3
A written scope, with the alternatives
The scope names the method, the footage and diameter involved, the price, the permits and inspections that apply, and the reasons the other methods were set aside. When the right answer is a dig, the scope says so.
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Step 4
Permits and notifications
The installer pulls the plumbing permit, any right-of-way or sewer-authority permit, schedules the inspections the local authority requires and files the utility-locate ticket before anything is opened.
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Step 5
The work, usually in a day
A residential liner typically cures in a few hours; bursting a lateral takes a day or two; a building or municipal reach is phased so no one loses their drains for more than a night. Branch lines are reinstated with a robotic cutter.
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Step 6
Final video, with you watching
The camera goes back through the finished pipe. You see the new interior end to end, and the recording goes in your file along with the warranty and the permit sign-offs.