December 2011 – West Canal Embankment Stability Improvements Near Oasis Park

Owner:

Quincy – Columbia Basin Irrigation District

Contract Amount:

$ 1,995,620

Project Manager:	Aaron Halling
Superintendent:	Michael Melton
Assistant P. M.:	Lisa Snell

Description:	The District has identified issues associated with soft soils under the West Canal in the project vicinity. Groundwater from upland sources was determined to be part of the issue and the District installed a trench drain on the west side of the canal in the winter of 2010/2011. While this has helped to intercept and remove much of the upland drain water, water continues to keep the soft soils under the canal saturated. This project aims at replacing the soft materials with freedraining materials and further collecting and removing water from beneath the canal. This project includes mobilization to the project site, demolition of the existing canal, excavation and removal of unsuitable materials, reconstruction of approximately 850 linear feet of concrete lined canal, installation and maintenance of a pump system and dikes to bypass canal water around the construction activities, removal and replacement of canal fill material (including dewatering activities), installation of a blanket and trench drain, and construction of a sump, pump, and electrical system on the east side of the West Canal. The Engineer will identify areas in which Geomembrane cutoff wall will be required for installation by Contractor.

Description:

The District has identified issues associated with soft soils under the West Canal
in the project vicinity. Groundwater from upland sources was determined to be
part of the issue and the District installed a trench drain on the west side of the
canal in the winter of 2010/2011. While this has helped to intercept and remove
much of the upland drain water, water continues to keep the soft soils under the
canal saturated. This project aims at replacing the soft materials with freedraining
materials and further collecting and removing water from beneath the
canal.
This project includes mobilization to the project site, demolition of the existing
canal, excavation and removal of unsuitable materials, reconstruction of
approximately 850 linear feet of concrete lined canal, installation and
maintenance of a pump system and dikes to bypass canal water around the
construction activities, removal and replacement of canal fill material (including
dewatering activities), installation of a blanket and trench drain, and construction
of a sump, pump, and electrical system on the east side of the West Canal. The
Engineer will identify areas in which Geomembrane cutoff wall will be required for
installation by Contractor.

Subcontractors:	Cherry City Electric, Environmental West Exploration, Apex Curb & Turf

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“Your staff was mindful in protecting our natural and cultural resources by taking a proactive approach to environmental issues. They saw a potential erosion and ground disturbance problem and proposed a great solution. They also cooperated with the archaeological investigation and showed their willingness and ability to be flexible.”

Sanh Ho

Environmental Engineer,
Southwest Region Parks Development

December 2011 – West Canal Embankment Stability Improvements Near Oasis Park

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