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Humboldt County board approves subsurface tile-lining quote, removes two sites from scope
Summary
The board approved a subsurface contractor's quote to install poly liners in drainage tile at multiple sites, excluding two locations to allow county forces to manage traffic control; discussion noted per-foot lining costs and expected longevity.
The Humboldt County board voted to approve a subsurface contractor's quote to install cured-in-place poly liners in drainage tile at multiple sites, with two locations (sites 11 and 12) removed from the contractor scope so the county can provide traffic control.
County staff (Speaker 2) told the board they inspected nine sites earlier in the year. The first seven are located within about one mile south of Thor and drain under a highway into an east-side ditch; site 11 is on Gosh Park Road and site 12 is near 270th by Scott Becker’s house. "My recommendation would be to strike site 11 and site 12 off of this quote," Speaker 2 said, noting those roads could be opened and repaired more cheaply with county forces and an open cut and concrete patch.
Staff described the lining method: cameras inspect tile runs, a reinforced poly liner is pulled through the pipe, inflated and cured with UV light to produce a single continuous liner that avoids joint separation and expectedly extends service life decades. Speaker 2 explained pricing history: a rough prior estimate had been about $10 per inch per foot (roughly $120 per foot for a 12-inch pipe), but current quotes were running as high as about $180 per foot.
Speaker 1 moved to approve the contractor quote with the two sites removed and incorporate the pipe-liner work; the motion was seconded and the board voted in favor. Following the approval, Speaker 4 asked about the cure time; Speaker 2 replied the repaired tile will carry water once crews reconnect the new liner and perform minor repairs after they "walk away." "When they walk away, we'll have a little bit of repair to do ... But as soon as we've got it reconnected, it'll carry water," Speaker 2 said.
Board members said removing the two sites and using county traffic control would save a line item previously quoted at $10,500. The board did not enumerate a detailed funding source in the transcript excerpt; staff and board indicated the work would be scheduled when weather allows.
The board directed staff to proceed with the subsurface lining contract as approved and to coordinate traffic control and scheduling.
The board will follow up with implementation details and scheduling once contractor availability and weather permit.
