Underground infrastructure performs different functions depending on the system it serves. Stormwater systems convey runoff, sanitary sewer systems transport wastewater, culverts move water beneath roadways and entrances, and other conveyance systems must perform under varying loads, site conditions, and installation requirements. Round reinforced concrete pipe (RCP) is used across many of these systems, including storm drains, sanitary sewers, culverts, and other underground conveyance applications.
County Materials manufactures round reinforced concrete pipe (RCP) for contractors, developers, municipalities, and infrastructure project teams seeking proven performance, efficient installation, and long-term reliability across critical infrastructure projects. RCP is engineered for a wide variety of primary underground applications like stormwater systems, sanitary sewers, and culverts.
Round reinforced concrete pipe combines concrete with steel reinforcement to provide structural strength for demanding underground applications. ASTM C76 establishes requirements for reinforced concrete culvert, storm drain, and sewer pipe, including five pipe classes with specified strength requirements. AASHTO M170 provides a corresponding specification for reinforced concrete culvert, storm drain, and sewer pipe.
Pipe performance also depends on more than the manufactured product. ASTM C76 notes that successful performance depends on appropriate pipe-class selection, bedding and backfill, and installation in accordance with construction specifications. RCP’s rigid concrete structure resists deformation, flotation, corrosion, and UV exposure while maintaining hydraulic performance without relying on surrounding soil for support. Depending on product availability and project requirements, round RCP can also incorporate gasketed joint systems designed to support watertight performance and efficient assembly.
A long record of strength and performance makes round RCP an economical and reliable choice for many underground infrastructure applications.
1. Commercial drainage and utility systems
Commercial sites can require drainage infrastructure beneath parking areas, access roads, buildings, and other developed surfaces where structural loading and reliable stormwater conveyance are important considerations. Round RCP is a practical solution that is ideal for both drainage and utility access. Its rigid structure and dependable load-bearing capacity combine to minimize maintenance needs, resisting deformation, flotation, corrosion, and UV exposure. Replacement costs are also minimized because reinforced concrete is engineered to perform up to 100 years.
2. Multifamily stormwater and sewer systems
Multifamily projects often require stormwater and sewer infrastructure to be coordinated with buildings, internal roadways, parking areas, utilities, and other site improvements. Construction schedules can make predictable product availability and installation important considerations. RCP is manufactured off site in a controlled environment and delivered ready to install, helping to keep multifamily projects on schedule. Produced with rigid reinforced concrete, it has a 100-year lifecycle, and it will not burn, rust, tear, buckle, or deflect. Its rigid reinforced-concrete construction supports long-term underground infrastructure performance after the development is placed into service.
3. Municipal sewer and drainage systems
Municipal planners must balance costs with performance, safety, and public convenience when installing or replacing underground infrastructure. Round RCP provides that balance by combining the affordability of concrete with the convenience of precast products. Manufactured off site, RCP can be produced simultaneously with site preparation, speeding installation and minimizing traffic disruption. Plus, its high load-bearing capacity and rigid structure supports applications subject to vehicle loading when appropriately designed and specified.
4. Residential drainage systems
Residential developers face many of the same challenges as multifamily developers and municipal planners. Round RCP can be used as part of underground drainage infrastructure for residential communities. Designed for culverts, storm drains, and sewer systems installed beneath streets, driveways, and yards, it resists deformation and flotation while supporting a consistent flow over time. Strong, durable and requiring little maintenance, it provides long term reliability.
5. Transportation drainage and culvert systems
Transportation drainage systems require pipe and culvert components capable of addressing traffic loads, hydraulic demands, site conditions, and applicable agency specifications. Designed to meet ASTM and AASHTO standards, reinforced concrete pipe withstands heavy loads, internal pressures, and demanding site conditions. Additionally, concrete is inherently fire resistant, which can help protect evacuation routes from collapse, flooding, and erosion during a crisis.
6. Utility and conveyance systems
Utility and conveyance projects can involve different operating conditions than conventional stormwater or sanitary sewer systems, making load conditions, access, system configuration, and project specifications important considerations.
Public utilities require expansive underground infrastructures. Round RCP can be considered because it performs consistently well under a variety of challenging conditions. Ideal for both wet and dry applications, as well as for access to critical infrastructure, round RCP is manufactured with rigid reinforced concrete under stringent quality controls. That supports its long-term durability and minimizes maintenance, even under heavy load conditions and freeze/thaw cycles.
County Materials' round reinforced concrete pipes have been used in a variety of different projects to manage stormwater infrastructure:
Residential drainage and sewer system: Adelwood by Del Webb
Transportation drainage system: Stillwater Road
Excavation limitations along this roadway that passes through Mahtomedi and Willernie, Minnesota, necessitated installing both round and elliptical RCP. Combined with other precast drainage components, they provide efficient, durable stormwater infrastructure while supporting heavy traffic use.
Municipal drainage system: Chestnut Street Plaza
This municipal redevelopment project in Stillwater, Minnesota, was constructed using large, 96-inch diameter precast RCP, as well as precast catch basins and manholes. They compose an underground stormwater retention system that protects the downtown pedestrian-friendly destination from flooding.
These projects demonstrate how County Materials’ RCP can meet tight schedules while providing long-lasting, low-maintenance underground infrastructure.
Round RCP is available in various sizes for easy customization. It is designed and carefully manufactured to be seamlessly compatible with a wide range of County Materials drainage and access components, including box culverts and aprons, catch basins, end treatments, inlets, junction boxes, and manholes. Coordinating compatible pipe and complementary precast components can help contractors and project teams simplify product planning across the underground infrastructure system.
According to the American Concrete Pipe Association (ACPA), reinforced concrete pipe has been used in the United States since the mid-1800s and remains a trusted solution for critical drainage infrastructure. Decades of successful installations demonstrate its value through reduced replacement needs and long-term resource efficiency.
Material selection should account for the structural system as well as the pipe itself. Rigid and flexible pipe systems interact with surrounding soil differently, making bedding, backfill, loading, and installation important project considerations. Round RCP has a rigid structure and a high load-bearing capacity that help it resist deformation and flotation.
Learn how reinforced concrete pipe supports stormwater, sewer, culvert, drainage, and conveyance systems across commercial, multifamily, municipal, residential, transportation, and utility infrastructure applications. Call our Customer Service Team at (708) 562-7700.