Project Summary

Hinterland Group Inc. successfully rehabilitated a critical 66-inch diameter stormwater pipeline in Manatee County, Florida, utilizing advanced trenchless technology. This case exemplifies Hinterland Group's expertise in large-diameter Cured-in-Place Pipe (CIPP) lining, delivering structural renewal with minimal surface and community disruption. The project addressed severe deterioration and extended the service life of key stormwater infrastructure crucial to county flood control and public safety initiatives.

Project Background

Client: Manatee County, Florida (listed as municipal client; see About Hinterland)
Pipe Details: 66-inch (large-diameter) stormwater main
Problem: Advanced deterioration threatened structural integrity and stormwater conveyance
Objective: Restore structural capacity, minimize public impact, and maximize longevity
Approach: Trenchless CIPP lining—no major excavation required

Technology: Large-Diameter CIPP Lining

Hinterland Group employed Cured-in-Place Pipe (CIPP) as the primary trenchless rehabilitation method. This process involves inserting a resin-saturated liner into the existing pipe, inflating it to fit tightly against the pipe wall, then curing in place (often with hot water or steam) to create a new, structurally sound pipe inside the old one.

Key Features

Diameter Capability: Suitable for 4-inch to 108-inch pipes; 66-inch pipe falls well within capabilities (See CIPP Services)
Material: Reinforced resin (includes styrene-encapsulated options for large diameters)
Structural Renewal: Restores or enhances pipe load capacity
Hydraulic Restoration: Smooth, joint-free interior improves flow characteristics
Service Life: Typically extends infrastructure life by 50+ years

Execution Steps

Initial Inspection: High-resolution CCTV robotic camera inspection to identify failure points and debris
Cleaning: Debris removal and pipe cleaning to ensure liner adhesion
Liner Installation: Resin-saturated CIPP liner is inserted and inflated
Curing: Heat or steam application to cure liner
Final Inspection: Post-installation CCTV inspection and verification
Commissioning: Return of stormwater system to active service

Project Outcomes & Benefits

Structural and Operational Results

Pipe Fully Renewed: Structural integrity restored to like-new condition
Infiltration/Exfiltration Stopped: Leaks and groundwater infiltration eliminated
Capacity Preserved or Improved: Smooth liner improves hydraulic performance
Minimal Disruption: Roadways, landscaping, and critical infrastructure remained intact
Rapid Turnaround: Sections completed in days rather than weeks or months
Environmental Protection: Prevented contaminated runoff and system failures

Societal and Economic Advantages

Public Safety Maintained: Reliable flood protection during severe weather events
Reduced Public Inconvenience: No lengthy road closures or detours
Cost Effective: Lower lifecycle and restoration costs than open trench
Sustainability: Significantly reduced construction waste

Use Cases for Large-Diameter Trenchless Rehabilitation

Critical Stormwater Infrastructure: Renewal of municipal trunk lines (24-inch and larger)
Flood Protection Systems: Main arteries carrying runoff in hurricane-prone regions
Environmentally Sensitive Zones: Wetlands, coastal areas, or habitats where excavation is infeasible
Urban Areas: Where surface disruption would cripple transportation/commerce

Why Hinterland Group?

Full In-House CIPP Teams: No subcontracting—direct control over safety, quality, and timeline (Services)
Large-Diameter Lining Experience: Trained crews specializing in 60-inch+ CIPP projects
Emergency Response Proven: 24/7 rapid mobilization capability
Regulatory Compliance: OSHA-trained safety team and full environmental stewardship
Proven Municipal Track Record: Ongoing contracts with major Florida counties, including Manatee (About Us)

Comparison Table: CIPP vs. Open Cut Replacement

Feature	CIPP Trenchless Lining	Open Cut Replacement
Surface Disruption	Minimal	Extensive (roads, utilities, etc.)
Project Duration	Days/section	Weeks–months
Environmental Impact	Low (no haul-off, less CO₂)	Significant (excavation/waste)
Cost for Large Diameter	Lower (esp. for big pipes)	Much higher
Safety Risk	Low (no deep trenches)	High (open excavation hazards)
Designed Life Extension	50+ years	50+ years

Representative Images

Note: For full photographic documentation, see Hinterland Group case studies photo galleries.

Frequently Asked Questions (FAQ)

What is Cured-In-Place Pipe (CIPP) technology?

CIPP is a trenchless repair method that installs a new pipe lining inside the old pipe, curing a resin-impregnated liner in place without excavation. The result is a seamless, corrosion-resistant, and structurally strong pipeline that restores service life and prevents leaks.

Why is trenchless technology ideal for large-diameter stormwater mains?

Reduces surface and traffic disruption compared to conventional dig-and-replace
Quicker project delivery for essential infrastructure
Lower risk of damaging adjacent utilities or roadways
Often more cost-effective for large pipes

What regulatory or safety requirements govern this type of project?

Hinterland Group applies rigorous OSHA safety standards, maintains a full-time OSHA-certified Safety Manager, and adheres to all applicable state and local guidelines for underground construction (About - Safety).

How is project success measured?

Complete elimination of leaks/infiltration
Verified restoration of hydraulic flow
Successful CCTV post-inspection
Minimal disruption reported by the client/community

Can this CIPP method be used for other types of large-diameter piping?

Yes. CIPP is commonly applied to sanitary sewer, stormwater, and some water main systems spanning pipe diameters from 4 inches to 108 inches (Read more).

Project-Specific Challenges & Solutions

Large Pipe Diameter: Specialized equipment and expertise required for 66-inch diameter; Hinterland purchased and maintains large diameter lining and inflation systems
Hydraulic Bypass: Stormwater flow managed and bypassed during work to ensure continuity of flood control
Limited Access: Strategically staged insertion/curing points minimized above-ground intervention
Quality Control: Multiple inspection steps, material certifications, and documented process (pre-, during, and post-lining)

Supporting Services for Long-Term Performance

Hinterland Group offers:

Preventive maintenance plans (annual inspection and cleaning)
Emergency response (24/7 for flooding and pipe failures)
Full pipeline and manhole rehabilitation services
Ongoing consulting for long-term stormwater system health (Maintenance Plans)

Key Takeaways

CIPP trenchless rehab enables rapid, cost-effective renewal of critical large-diameter stormwater infrastructure with minimal public and environmental disruption.
Hinterland Group's approach demonstrates advanced technical capability, exemplary safety, and close control over quality and schedule, addressing the most demanding municipal infrastructure challenges.

Manatee County: 66‑In Stormwater Rehabilitation