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Manholes

Manholes are engineered access structures used in sanitary sewer, storm sewer, and utility applications to provide entry, inspection, and maintenance of underground pipelines. Contractors, engineers, and municipalities rely on precast concrete manholes to withstand challenging environments, resist the elements, and provide a long service life at a low cost. These essential access points serve as system connections within sanitary and stormwater networks, supporting vertical and horizontal pipe alignment. Precast concrete manholes are manufactured as individual components, with two primary elements: the manhole base and the manhole lid. They are available in round, square, and rectangular configurations with inside diameters ranging from 24” to 144”, to meet diverse project requirements.

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Manholes Provide Essential Access to Underground Networks

Manholes are resilient precast concrete structures that provide access to sanitary sewer, utility, and stormwater systems, making them essential for inspection and maintenance in various applications.

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Parking Lots

Commercial properties install precast concrete manholes as essential access points for inspecting and maintaining sanitary sewers, utilities, and stormwater conveyance systems. Manufactured in a controlled environment to ensure quality performance, AASHTO and ASTM certified manholes provide a long service life, are engineered to withstand harsh conditions, and resist the elements. Precast concrete manholes integrate with inlets, catch basins, and junction boxes to boost efficiency, simplify installation and enhance long-term durability for properties with landscapes and parking areas.

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Roadways

Roadway and street surface drainage systems rely on precast concrete manholes to provide inspection and maintenance access points for a variety of applications, including sanitary sewers, utilities, and stormwater conveyance systems. Manufactured to meet AASHTO and ASTM requirements, manholes are built to withstand harsh conditions, resist the elements, and deliver a long service life. Precast concrete manholes integrate easily with inlets, catch basins, and junction boxes to improve efficiency, streamline installation, and support the long-term resilience of street and roadway infrastructure.

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Access Roads and Pedestrian Areas

Residential properties utilize precast concrete manholes to access sanitary sewers, utilities, and stormwater conveyance systems for inspection and maintenance purposes. Engineered to meet AASHTO and ASTM standards and manufactured to deliver a consistently high-quality product, manholes are proven to reliably resist the elements, perform under harsh conditions, and deliver a long service life. Precast concrete manholes efficiently integrate with inlets, catch basins, and junction boxes to simplify the installation process and ensure durability in the long term for residential complexes

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Highways and Railways

Highway and railway systems depend on precast concrete manholes to serve as essential inspection and maintenance access points for various applications, including sanitary sewer systems, utilities, and stormwater conveyance systems. Built to comply with AASHTO and ASTM requirements, manholes resist harsh environmental conditions, endure the elements, and deliver a long service life. Precast concrete manholes smoothly connect with inlets, catch basins, and junction boxes, which helps to streamline installation, improve efficiency, and enhance long-term resilience across transportation networks.

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Parking Lots

Multifamily properties utilize precast concrete manholes to provide access for the inspection and maintenance of sanitary sewers, utilities, and stormwater conveyance systems. Manufactured to meet AASHTO and ASTM requirements and built to deliver a consistently high level of quality, manholes resist the elements and withstand challenging environmental conditions to provide a long service life. Precast concrete manholes easily integrate with inlets, catch basins, and junction boxes to help ensure efficient installation, outstanding efficiency and long-term durability for multifamily developments.

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Utilities Access

Precast concrete manholes provide access to sanitary sewers, utilities, and stormwater conveyance systems for inspection and maintenance. Constructed to meet AASHTO and ASTM standards, manholes are built to deliver a consistently high level of quality and ensure a long service life, resisting the elements and withstanding challenging environmental conditions. Precast concrete manholes are designed to integrate with inlets, catch basins, and junction boxes, to provide efficient installation, high efficiency, and long-lasting durability for utilities.

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The Benefits of Manholes

Providing essential access points to sanitary sewers, storm sewers, and utility applications, precast concrete manholes offer key benefits.

Access and Alignment

Within sanitary and stormwater networks, manholes provide essential access for inspection, maintenance, and system connections, and help stabilize pipe alignment.

Fast, Efficient Installation

Precast concrete manholes improve installation efficiency compared to cast-in-place alternatives, to help keep project schedules on time.

Consistent Quality

Precast concrete manholes are manufactured in a controlled environment to ensure quality performance.

AASHTO and ASTM-Certified

Manufactured to meet AASHTO and ASTM standards, precast concrete manholes support specification acceptance and deliver reliable performance.

A One-Stop Shop

County Materials manufactures a comprehensive range of precast wet utility structures, including manholes, inlets, catch basins, and junction boxes.

Reliable Access Solutions Across Diverse Markets

County Materials precast concrete manholes provide durable, low-maintenance access structures that support inspection, maintenance, and long-term performance across sanitary sewer, utility, and stormwater systems in a wide range of markets.

View Commercial Solutions
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Commercial

Precast concrete manholes provide reliable access to sanitary sewer, utility, and stormwater systems throughout commercial developments, including parking lots, retail centers, and office complexes. County Materials manufactures a broad range of precast wet utility structures designed to support efficient installation, dependable system performance, and long-term durability across commercial sites.

View Multifamily Solutions
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Multifamily

Multifamily developments use precast concrete manholes to maintain access to underground utility and stormwater systems serving parking areas, shared amenities, and residential buildings. County Materials delivers coordinated precast utility solutions that help support efficient site development, dependable performance, and long-term durability throughout multifamily properties.

View Municipal Solutions
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Municipal

Municipal infrastructure projects rely on precast concrete manholes to provide dependable access for inspecting and maintaining sanitary sewer, utility, and stormwater networks beneath streets, roadways, and public spaces. County Materials manufactures a wide variety of precast wet utility products designed to support efficient project coordination, long service life, and resilient municipal infrastructure systems.

View Residential Solutions
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Residential

Manholes support inspection and maintenance access for underground sanitary sewer, utility, and stormwater systems throughout residential communities and neighborhood developments. County Materials provides a comprehensive range of precast concrete utility structures manufactured to support long-term performance, efficient installation, and reliable infrastructure across residential applications.

View Utilities Solutions
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Utilities

Access to underground utility infrastructure depends on durable precast concrete manholes manufactured for inspection, maintenance, and system connectivity. County Materials manufactures precast wet utility structures designed to withstand challenging conditions while supporting efficient installation and reliable long-term service across utility networks

View Transportation Solutions
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Transportation

Precast concrete manholes support transportation infrastructure by providing dependable access to underground sanitary sewer, utility, and stormwater systems beneath highways, railways, and roadway corridors. Built for long-term resilience in demanding environments, County Materials’ precast structures help streamline installation and support reliable infrastructure performance across transportation networks.

Projects

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The Minnesota Department of Transportation (MnDOT), in partnership with Dakota County, Hennepin County, the City of Bloomington and the City of Burnsville, are working together to raise I-35W out of the Minnesota River floodplain and improve pedestrian access across the river.

Minnesota River Bridge

Burnsville, MN

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