Partial collapse and significant cracking in storm drain pipes reduce hydraulic capacity and indicate progressive structural failure. Camera inspection confirms whether CIPP lining is still viable — or whether the pipe has passed the threshold where excavation becomes the only option.
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Storm drain pipe collapse follows a predictable progression — from initial cracking through partial collapse to complete failure. Each stage has implications for rehabilitation options.
The window for trenchless rehabilitation closes as structural failure progresses. Camera inspection confirms where in the progression each section is — and whether CIPP lining is still viable.
Collapse and cracking are most common in aging concrete and metal pipe systems — particularly those at or past their design life under current loading conditions.
A Greensboro commercial property's routine maintenance camera inspection found a partial crown collapse in an 18-inch RCP storm drain main under the main entry drive — approximately 35% of the pipe cross-section was obstructed by the deflected crown section. The pipe was still flowing but was identified as a near-term failure risk.
LiningWorks installed a structural CIPP liner through the full affected run, bridging the partial collapse section. Post-installation camera confirmed full liner bond and restoration of the near-full pipe cross-section. The entry drive was not closed during installation.
“Partial crown collapse found during routine inspection under the main entry drive. LiningWorks lined the run through manholes while the driveway stayed open. Post-installation camera showed complete restoration. Avoided what would have been an emergency excavation.”
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Storm drain collapse rehabilitation requires camera confirmation that the trenchless window is still open — and structural liner specification that accounts for the collapse condition.
Camera confirms the trenchless window is still open — act before partial collapse becomes complete failure.
336-477-3218, Mon–Sat 7AM–6PM. Surface depressions, capacity loss during storms, known pipe age and material — describe the symptoms and we'll assess urgency and schedule promptly.
We scope the affected system to assess collapse degree, confirm whether trenchless rehabilitation is still viable, and develop a structural liner specification.
Structural liner installed through existing access points — no excavation. Post-installation camera verifies full rehabilitation. Documentation package for property records.
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