• 48" risers

  • Manhole sections with conical tops

  • Inside manhole

  • Drains to stream manhole cover

  • Adjustment rings

  • Manholes with conical tops

  • Manhole sections

  • Sections ready for delivery

  • Adjustment rings

  • Manhole finishes

  • Precast concrete catch basin sections

  • Catch basin combo curb inlets

  • Catch basin curb inlet

  • Precast concrete catch basins

  • Ditch inlets

Manholes / Catch Basins

Manhole drawing by Columbia Precast Concrete
Manholes Spec Sheets
24″ Manhole - Mono Base
Specs
48″ Drywell with Eccentric Cone
Specs
48″ Drywell with Flat Top
Specs
48″ Manhole Slope Inlet
Specs
48″ Manhole with Eccentric Cone
Specs
48″ Manhole with Flat Top
Specs
60″ Type 1 Manhole with Eccentric Cone
Specs
60" Type 3 Manhole with Flat Top
Specs
72" Type 1 Manhole with Eccentric Cone
Specs
72" Type 3 Manhole with Flat Top
Specs
84″ Manhole with Reducing Slab
Specs
96″ Manhole with Reducing Slab
Specs
120″ Manhole with Flat Top
Specs
120″ Manhole with Reducing Slab
Specs
144″ Manhole with Reducing Slab
Specs
Grade Adjustment Rings Spec Sheets
25″ Grade Adjustment Rings
Specs
30″ Grade Adjustment Rings
Specs
36″ Grade Adjustment Rings
Specs
42″ Grade Adjustment Rings
Specs
Manhole Notes
Hole Size Data
Maximum Hole Size Data

Precast concrete catch basins provide a ready-to-install method to collect and filter runoff, separate contaminants, and prevent damage from excessive rainfall or snowmelt.

Catch Basins Spec Sheets
Airport Catch Basin
Specs
BPA Catch Basin
Specs
City of Salem Type 1 Catch Basin
Specs
WSDOT Catch Basins  
WSDOT Type 1
Specs
WSDOT Type 1 Inlet
Specs
WSDOT Type 1 Curb Inlet
Specs
WSDOT Type 1L
Specs
WSDOT Type 1L Ditch Inlet
Specs
WSDOT Type 1 Counter-Buoyancy Catch Basin
Specs
ODOT Catch Basins  
ODOT Type 3
Specs
ODOT Type CG2
Specs
ODOT Type CG3
Specs
ODOT Type G2
Specs
ODOT Type G2 Ditch Inlet
Specs