Pole Drain Systems
’S LANDING LIVE POLE DRAIN SYSTEM
Landing Road, Riondel, British Columbia.
Ministry of Transportation and Highways British Columbia.
To stabilize a slope failure by providing drainage of
surface and sub-surface seepage water using a live pole
drain system in combination with other soil bioengineering
series of two slope failures occurred at the Walker
’s Landing site, in February and December of 2002. In
March of 2003 the site was re-contoured and planted
with brush layers, using a Spyder Hoe and manual labour.
Link to: Main
Walker's Landing page
addition to the brush layer structures, a “live pole
drain system” in conjunction with lateral drain fascines
was installed to drain seepage water emerging at the
upper portion of the slope. The installed system was
designed to follow the lay of the land and branched
out mid-way down the slope, directing water to each
side of the failure at the toe.
live pole drain system used consisted of cylindrical
bundles of live cuttings of approximately 25 cm in diameter
and 4 m in length secured to the slope using steel re-bar.
The species used were a mix of Willow (Salix bebbiana/scouleriana/exigua),
Black Cottonwood (Populus balsamifera ssp. trichocarpa),
and Red-Osier Dogwood (Cornus stolonifera).
site was monitored in 2003, 2004 and 2005. The results
found the system working efficiently at draining seepage
water and stabilizing the slope. The survival of the
vegetative structures was also found to be very good.