HomeNewsNewsCrux to return to Blue Lake for difficult-access grouting

Crux to return to Blue Lake for difficult-access grouting

Published on Back To Index

Barnard Construction Company, Inc. has selected Crux to participate in the construction phase of the Blue Lake Hydroelectric Expansion Project.

Crux provided difficult-access core drilling during the exploration phase of the project in 2009, and will return next month to commence construction activities.

The existing Blue Lake Project is located approximately 5 miles east of Sitka, Alaska, and consists of a dam, a submerged intake structure, a power conduit, three powerhouses and a switchyard. Growing electricity demands in the region have exhausted current resources and necessitated an increase in annual energy output. The expansion will include the addition of a third generating turbine and raising the dam 82 feet (from 164 feet to 246 feet). Once completed, the system’s potential energy output will increase by 27% and relieve Sitka’s dependence on diesel generated power.

Crux’s scope of work includes a foundation grouting program, rock anchor installation and micropile installation. Consolidation grouting will be completed, followed by curtain grouting in the left and right dam abutments to reduce the permeability of rock formations. Rock anchors will then be installed in both abutments for increased stabilization. Near the base of the dam, micropile installation will be completed to support the plunge pool scour wall. Additionally, Crux has been contracted to install pressure relief wells and to drill exploratory core holes from within a new drainage tunnel.

Drilling and grouting sites are in difficult-to-reach locations and will be accessed using a crane suspended platform. Crux utilized a similar approach during the exploration phase of the project and is familiar with unique logistical challenges of the area.

Recommended Posts

Back to Index
Crux Recognized as an ADSC Safety Award Winner

September 1, 2020 The International Association of Foundation Drilling (ADSC) has named Crux a Safety Award Winner for the calendar year 2019.  Crux is recognized in the 100,000-300,000...

Learn More
Crux Announces New President

January 13, 2020 Crux Subsurface, Inc. (Crux) is pleased to announce Scott Tunison as company President. Mr. Tunison co-founded Crux in 1998 and has seen the company through...

Learn More
Crux Participates in ISM 2019, Australia

August 23, 2019 Crux engineers were in Australia’s Gold Coast this week to present case studies and participate in expert panel discussions at the 14th International Workshop for...

Learn More
Copyright © 2022 Crux Subsurface, Inc.
Back to Top