Haines Junction, Yukon
2010
During exploration drilling to develop geothermal energy, a water bearing stratum under considerable artesian pressure (60 psi) was intersected. The flow eroded the annular space around the drill casing and resulted in a substantial loss of soil, threatening sacred features (hot springs) on native (Champagne Aishihik) land.
ECO was called to assist the Engineer and the drilling contractor to bring the situation under control. It did not help that the temperatures were well below – 25oC. This made stopping the flow of water and soils “in the middle of nowhere” a very challenging undertaking.
Barrier bags were strapped onto a steel sleeve pipe lowered into the casing. After the casing was removed, the bags were inflated with cement based suspension grout. This sealed the flow. The area above the barrier bags was filled with cement based suspension grout.
ECO designed the remedial grouting program and assisted the driller in a hands-on capacity.
Client: EBA Engineering Consultants Ltd.