Prima Base™ Monolithic Manhole Base

County Materials’ Prima Base™ Monolithic Manhole is a state-of-the-art, high-precision manhole base, designed and manufactured to provide unrivaled quality in sanitary and stormwater management systems. 


  • Channel, inlets, and outlets are manufactured to precise dimensions and locations, specially produced to project requirements
  • Optimized flow achieved through channel geometry, generated by 3D design software and smooth surface texture
  • Variable inlet and outlet heights can be produced in a single casting
  • Consistent channel appearance regardless of intricacy
  • Channel depth control

County Materials’ Prima Base Monolithic Manhole meets ASTM C-478 specifications.

For more information, contact our Pipe/ Precast Team at (608) 244-1381.

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