Maintainable Weep Hole Filters

Retaining Wall Drainage and Erosion Control

1-800-475-2029 1-800-475-2029

Restore Box Culvert substructure drainage with Weep Hole Filters

Box culverts have unique drainage challenges. As they are buried underground, hydrostatic pressure can build up on all four sides. In addition to the pressure on both walls, there may be downward pressure building up on the top slab and uplift pressure on the base.

Of the approximately 135,000 box culverts in the US, over 101,000 are 30 years or older. Fortunately, the vast majority are in Good or Fair condition.

Focus:

Keep “Good” culverts from becoming “Fair“.
Keep “Fair” from becoming “Poor“

Michigan DOT uses Maintainable Weep Hole Filters to restore drainage of hydrostatic pressure off box culvert walls to eliminate pressure on the top slabs and reduce the uplift pressure on the base.

Find additional information:
1) Full length installation video on this page. It is 6 minutes long. To view Coring or Installation only videos visit the MDOT ITD Project page.

2) MDOT Innovative Technology Demonstration Project with MDOT, LS Engineering and AASHTO’s Bridge Preservation Partnership.

3) MDOT Box Culvert Case Study I-96 & 68th Street in Coopersville, MI