Grant County, Washington
Excavation in Quincy, Washington
Quincy sits on the floor of the Quincy Basin, on Ice Age flood gravel over basalt. Two things catch people out here. The caliche and the sand.
Working ground in Quincy
- Flood gravel here carries basalt cobbles and boulders up to five and a half feet across, plus granite erratics carried down from the north.
- Cemented caliche is documented in this basin at two to four feet thick. That is a layer you break, not a layer you scrape.
- Ephrata-type ground changes abruptly from sandy loam to 50 to 85 percent gravel somewhere between 20 and 40 inches. You feel it through the machine.
- Quincy-series sand is excessively drained with very rapid permeability. Trench walls in it do not stand on their own, and we shore accordingly.
- The Quincy-Columbia Basin Irrigation District runs 88 miles of main canal and roughly 893 miles of sublateral through this ground. Their facilities get located separately from an 811 ticket.
- Grant County's design frost depth is 18 inches, the shallowest of any county we work in.
Backcountry Excavation LLC is a registered Washington contractor, licensed, bonded and insured. You can check all of it before you hire us.
Quincy questions
Do you take commercial site work around Quincy?
Yes. Pads, trenching, utilities, storm and final grade are the same work at any scale, and we are set up to sub to a general contractor.
How do you handle the caliche?
We plan for it in the bid rather than discovering it on day two. If it turns up thicker than expected you hear about it before we keep going.
Start with a straightforward estimate
Got a job in Quincy?
Tell us where the site is and what you are trying to get done. We will let you know whether we can take it on and roughly when.