New City Trenchless repairs failed storm drainage across Rockland County: the corrugated metal culverts, clay yard drains and buried downspout lines that move roof and surface water off properties from New City out to the river towns. Trenchless storm drain pipe repair uses the same lining and bursting tools as our sanitary work, applied to pipe that only earns its keep when it rains.
The Storm Pipes Buried Under Rockland Properties
A typical property here carries more storm pipe than its owner knows about. Downspout leaders run roof water away from the foundation in corrugated poly or, on older homes, small-bore clay. Yard drains and catch basins collect low spots and feed buried laterals downhill. Driveway culverts, most often corrugated metal pipe, carry roadside ditches under the apron. Newer installs use SDR-35 PVC or corrugated HDPE. Because these lines sit empty most of the month, they can be half failed for years before a big storm makes it obvious.
How Storm Lines Fail When Sanitary Lines Do Not
There is no grease blockage in a storm line. Its cargo is silt, roof grit and leaf litter, which settles out in any bellied pipe and packs hard. Corrugated metal culverts rust through along the invert first, the bottom arc where water stands between storms. Corrugated poly crushes under vehicle wheels it was never rated for. Roots hunt storm pipe aggressively, since a line that is damp at the joints but rarely full is exactly what root intrusion favors. And on Rockland’s sloped lots, settling fill pulls joints apart into offsets that snag debris on every storm.
Lining and Bursting at Storm Diameters
The method set transfers from the sanitary side with two differences: diameters run larger and there is no flow to bypass, since the work simply gets scheduled between rains. The line is cleaned with a hydro jetter, then inspected by CCTV camera with a locating sonde to map depth. A structurally sound run takes a full-length liner; UV-cured fiberglass liner suits culvert work because it cures fast and predictably in cold pipe where ambient cure epoxy resin is slow. One crushed barrel section takes a sectional point repair. A run collapsed beyond lining gets pipe bursting, with new HDPE pulled through the old alignment.
When a Failed Storm Drain Looks Like a Landscape Problem
Most storm pipe failures get blamed on the landscape first. A soft dip or small sinkhole tracking above the pipe run means soil is washing into the line through a break. Ponding in a corner that used to drain, gravel washing out at the culvert ends, or a sheet of ice across the driveway every winter where a crushed leader forces roof water to the surface all point underground. So does a wet basement wall on the uphill side of the house. Rockland’s short steep watersheds drop water fast toward the Hackensack and the Hudson, and a camera inspection is the cheap way to learn whether your problem is grading or a broken pipe doing the ponding for you.
Frequently Asked Questions
Can a driveway culvert be relined without breaking the driveway?
Usually, yes. If the culvert still holds its shape it is cleaned, then lined end to end working from the two open ends, with nothing above it touched. A section crushed fully flat cannot take a liner and needs bursting or a dig at that one spot.
Are downspout and yard drain lines worth lining?
It depends on what sits above them. Under a patio, a walkway or a mature tree, lining wins easily. A shallow line under open lawn is sometimes cheaper to replace in an open trench, and we will say so when that is the honest answer.
What does it cost to find out what is wrong?
The same camera inspection we run on sanitary lines, $250 to $500 and often credited against repair work. Storm lines are usually dry between rains, which makes for clear footage and a quick answer.