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Colfax approves infiltration trench to address groundwater seepage on Culver Street
Summary
City staff and the city engineer told council that groundwater was seeping up through recently paved Culver Street; after geotechnical borings, council approved moving forward with the lowest apparent bidder plus a 15% contingency to install an infiltration trench designed to relieve groundwater pressure.
Colfax City Council voted Dec. 10 to approve a construction contract (low apparent bidder plus a 15% contingency) to build an infiltration trench along a problematic section of Culver Street where groundwater has been ‘‘weeping’’ through new pavement.
City Engineer Carl Moore told the council that hand borings by Geocon indicate substantial sheet flow under the pavement and that an old concrete retention vault in front of the sheriff’s substation — whose piping has since failed…
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