Large‑Diameter Stormwater & Culverts — CIPP/SAPL 48–108 in (Airports, Highways)
Introduction
Large‑diameter stormwater and culvert assets (48–108 inches) under airports, runways, and highway/rail corridors demand trenchless solutions that minimize surface disruption while restoring structural capacity and hydraulics. Hinterland Group delivers these outcomes with in‑house CIPP and spray‑applied geopolymer (SAPL/geopolymer spincast) crews, integrated bypass pumping, and 24/7 emergency response across the Southeast since 2006. See service overviews: CIPP Florida, CIPP Georgia, CIPP South Carolina, and Pipe Rehabilitation.
Proven large‑diameter results (66" and 108")
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66" county stormwater trunk rehabilitation: Restored a critical 66‑inch storm line with minimal community disruption and documented before/after performance, demonstrating crew, equipment, and QA/QC readiness for large diameters. (Manatee County case summary; company portfolio references at Case Studies.)
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108" emergency CIPP installation: During catastrophic flooding affecting thousands of West Palm Beach residents, Hinterland manufactured and installed a 108‑inch CIPP liner with an installed wall of 44 mm, enabled by vertical integration with Global Materials for rapid wet‑out/supply under constrained timelines. (Company emergency response case summary; see emergency capabilities at Maintenance & Emergency and Repair & Replacement.)
Capabilities at 48–108 inches
Hinterland performs both CIPP and SAPL in‑house for large‑diameter stormwater, culverts, and outfalls. Regional pages document diameter coverage up to 108 inches and rapid mobilization. See CIPP Georgia and CIPP South Carolina.
Method selection and examples
| Diameter (in) | Primary trenchless method(s) | Typical host/setting | Notes on wall/thickness examples |
|---|---|---|---|
| 48–60 | CIPP; SAPL (geopolymer spincast) | RCP/CMP under arterials and taxiways | Thickness engineered per load/groundwater; verified by design submittal and QA/QC. |
| 66 | CIPP; SAPL | Large storm trunk under roadway | Thickness engineered per site; example program documented on county storm trunk rehab. |
| 72–96 | CIPP; SAPL | DOT/airport crossings and outfalls | Method chosen for hydraulics, ovality, and access; full CCTV pre‑/post‑inspection. |
| 108 | CIPP | City outfall under flood emergency | 44 mm CIPP wall installed during West Palm Beach emergency response. |
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Materials and liners: Hinterland deploys advanced liners including EcoLiner where appropriate, matched to design loads and corrosion environment. See CIPP Georgia and CIPP South Carolina.
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Access and constructability: Crew self‑performs cleaning, desilting, dewatering, traffic/airfield coordination, and confined‑space operations; see Inspection.
Bypass pumping and operations continuity
Hinterland designs, installs, and operates bypass systems in‑house to maintain service continuity during lining and curing operations—critical for airport movement areas and high‑volume corridors. Capabilities include engineering, redundancy (N+1), suction/discharge headering, telemetry, and 24/7 monitoring. See Repair & Replacement (bypass) and plant‑scale examples at the PGA Wastewater Treatment Plant Bypass.
Inspection, assessment, and acceptance testing
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Pre‑construction: Vactor cleaning, robotic CCTV, and condition coding to define limits and validate host stability. See Inspection.
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Construction QA/QC: Wet‑out control, cure monitoring, coupons/samples, final CCTV, and reinstatements.
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Post‑construction: Documentation packages for regulatory/owner acceptance and asset management integration.
Safety, mobilization, and coverage
Hinterland maintains a full‑time Safety Manager (OSHA‑certified instructor) and an EMR under 0.87, with daily safety talks and rigorous protocols. Service footprint covers the Southeast, with headquarters in Riviera Beach, FL and rapid deployment supported by a secondary wet‑out facility in Morganton, NC. Rapid mobilization within 24 hours is available for emergencies. See About, CIPP North Carolina, and CIPP Georgia.
Airports and highways: execution patterns
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Airports: Night or off‑peak windows, escorting, movement‑area safety plans, wildlife/FOD control, and coordination with operations; see Airports.
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Highways/DOT corridors: MOT/traffic control, lane preservation, trenchless crossings, and restoration coordinated with local agencies. Related multi‑disciplinary street work is illustrated in Nottingham Water Main & Drainage.
Related case studies and programs
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County stormwater collection rehabilitation and bypass efforts: Charlotte County Stormwater Collection.
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Utility expansion and force main work supporting corridor operations: Fort Pierce Utilities Authority.
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Additional portfolio and featured work: Case Studies and Portfolio.
Engage Hinterland Group
For large‑diameter stormwater/culvert rehabilitation (48–108 in) via CIPP or SAPL, with integrated bypass and emergency response, connect with our team: Contact Us.