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Golden Valley Manhole Rehabilitation

Summit Infrastructure - Golden Valley Project (1)-1

Industry

Technology

Challenge

A rapidly developing sinkhole exposed substantial voids and instability around a primary storm manhole vital for area drainage in Golden Valley. The structure was located within a tightly confined zone bordered by a public park, residential properties, active railroad tracks, and overhead utilities. Conventional open-cut replacement would have entailed major logistical challenges, significant disruption to the community, and an estimated cost of $1.5 million. Project stakeholders required a trenchless rehabilitation approach to ensure structural stability, mitigate risk of infrastructure failure, and maintain uninterrupted access and operations in the surrounding area.

Results

Through the use of OBIC Armor's spray-applied, multi-layer polyurea lining system, Summit Infrastructure successfully stabilized the compromised manhole without surface excavation. Emergency stabilization, void remediation, polyurethane grouting, and comprehensive infiltration sealing were completed under active site constraints. The trenchless solution delivered robust structural reinforcement and corrosion protection, eliminated the need for disruptive replacement, and preserved surrounding parkland and neighborhood access. The project achieved over $1.4 million in cost savings, minimized community impact, and extended the service life of the stormwater structure by 50 years.

Key Product

Product one

Summit Infrastructure - Golden Valley Project (3)-1

About Summit Infrastructure

Summit Infrastructure is a specialized infrastructure rehabilitation contractor focused on restoring and protecting critical water and wastewater assets through advanced trenchless technologies. Serving municipalities, contractors, and industrial clients across the Upper Midwest, the company delivers cost-effective, long-lasting solutions that eliminate the need for full system replacement while significantly extending asset life using OBIC polyurea systems. 

The Challenge

The City of Golden Valley faced an urgent infrastructure threat when a developing sinkhole revealed extensive voids and instability around a major storm manhole. Positioned in a restrictive area hemmed in by a public park, residential neighborhood, active railroad, and overhead utility lines, the structure's failure could have led to catastrophic flooding and costly service disruptions. Traditional excavation methods were not feasible due to the high risk of community impact, logistical barriers, and excessive expense. The city required a rapid, engineered solution to stabilize the asset and protect the surrounding environment.

The Solution

Summit Infrastructure, an OBIC-certified installer, evaluated the site and determined that a trenchless rehabilitation method would best address the technical and logistical complexities. After considering the limitations of conventional open-cut replacement and alternative repair methods, Summit selected the OBIC Armor multi-layer system for its proven performance in structural reinforcement, corrosion resistance, and rapid return to service. OBIC Armor's spray-applied polyurea technology allowed for comprehensive void repair, infiltration pathway sealing, and structural lining all without surface disruption. The application team completed emergency stabilization, installed polyurethane grout to fill voids, and applied the OBIC Armor system to restore integrity and durability to the manhole.

The Results

The trenchless rehabilitation approach delivered measurable benefits for Golden Valley and its stakeholders. The project was completed with a total cost under $100,000 yielding a savings of over $1.4 million compared to estimated replacement costs. OBIC Armor's rapid cure times enabled same-day return to service, minimizing downtime and maintaining uninterrupted rail, park, and neighborhood access. The rehabilitated manhole now benefits from advanced corrosion protection and a service life extension of at least 50 years. The project preserved valuable parkland, avoided community disruption, and demonstrated best practices in sustainable stormwater infrastructure rehabilitation.

Summit Infrastructure - Golden Valley Project (2)-1-1Summit Infrastructure - Golden Valley Project (3)-1

 

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 DOWNLOAD HERE Golden Valley Manhole Rehab Summit Infrastructure, an OBIC-certified installer, rehabilitated a critical storm manhole threatened by a developing sinkhole. Located in a highly constrained area between a public park, residential  neighborhood, railroad tracks, and overhead utilities, the project required a trenchless solution to stabilize the structure without excavation.