Context of the project<\/h2><\/div>In February 2014, a 20 metre long, 5 cm wide crack was found on the upstream side of a pier in the spillway of the Wanapum dam in Washington State. As an emergency measure, the Grant County Public Utility District, which operates the dam<\/a>, lowered the level of the reservoir by eight metres to reduce pressure on the structure.<\/p>\n<\/div>Description of the project<\/h2><\/div>In May 2014, it awarded the contract to repair the dam to Soletanche Bachy\u2019s North American subsidiary Nicholson Construction<\/a>. Nicholson began by coring the dam from the drainage gallery to map the crack. It then installed 35 vertical anchors<\/a> with a maximum capacity of 1,000 tonnes on each of the 13 dam piers to stabilise the dam and reinforce the spillway.<\/p>\n<\/div>Our solution<\/h2><\/div>This part of the project was completed in November 2014 following 10 months of uninterrupted work. It ended with the installation of uphole drains in the gallery, drilling, installation of 69 bars on the ogee and grouting<\/a> to plug the crack.<\/p>\n<\/div>![](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/08\/BH49710-slider-1024x436.jpg\")
<\/span><\/li>![](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/08\/WanapumDam_Sunet-slider-1024x436.jpg\")
<\/span><\/li><\/ul><\/div><\/div><\/div><\/div>Type of project:<\/h3><\/div>![\"Dam\"](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/03\/Barrage.png\")
<\/a><\/span>Dam<\/h4><\/div><\/div><\/div>Location:<\/h3><\/div>Etats-Unis<\/p>\n<\/div>
Filiale de Soletanche Bachy :\u00a0<\/h3><\/div>Nicholson Construction<\/a><\/p>\n<\/div>Project owner:<\/h3><\/div>Grant County Public Utility District<\/p>\n<\/div>
Prime contractor:<\/h3><\/div>MWH<\/p>\n<\/div>
Main contractor:<\/h3><\/div>Kuney Goebel JV<\/p>\n<\/div>
Works period:<\/h3><\/div>05\/2014 \u2013 04\/2015<\/p>\n<\/div>
Types of techniques:<\/h3><\/div>![\"Ground](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/03\/Anchor.png\")
<\/a><\/span>Ground anchors<\/h4><\/div><\/div><\/div>![\"Grouting\"](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/03\/Injection.png\")
<\/a><\/span>Grouting<\/h4><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\n\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>Key figures of the project<\/p><\/h2><\/div>
<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>0<\/span><\/div>ground anchors<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>Related techniques<\/h2><\/div><\/div><\/div><\/i>See all the techniques<\/span><\/a><\/div><\/div><\/div>- <\/span><\/a><\/span>
Grouting<\/a><\/h3><\/div><\/div><\/div><\/div><\/div> Soil-cement columns built by erosion Whether it's a dam and its watertightness, a tunnel and [...]<\/p><\/div>
<\/i>Find out more<\/span><\/a><\/div>\n\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t![\"\"](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2022\/05\/CH_20190930_133-mobile-2.jpg\")
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div><\/div><\/li>\n- <\/span><\/a><\/span>
Ground anchor<\/a><\/h3><\/div><\/div><\/div><\/div><\/div> An essential system for the stability of your structures. Soletanche Bachy uses ground anchors for [...]<\/p><\/div>
<\/i>Find out more<\/span><\/a><\/div>\n\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t![\"\"](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2022\/05\/2011-08-05-15.53.12_Espace-des-Jacobins_Le-Mans_Machines-1024x509-1.jpg\")
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div><\/div><\/li>\n<\/ul><\/div><\/div><\/div><\/div><\/div><\/div><\/div>Our projects<\/h2><\/div><\/div><\/div><\/i>See all our projects<\/span><\/a><\/div><\/div><\/div>
In February 2014, a 20 metre long, 5 cm wide crack was found on the upstream side of a pier in the spillway of the Wanapum dam in Washington State. As an emergency measure, the Grant County Public Utility District, which operates the dam<\/a>, lowered the level of the reservoir by eight metres to reduce pressure on the structure.<\/p>\n<\/div> In May 2014, it awarded the contract to repair the dam to Soletanche Bachy\u2019s North American subsidiary Nicholson Construction<\/a>. Nicholson began by coring the dam from the drainage gallery to map the crack. It then installed 35 vertical anchors<\/a> with a maximum capacity of 1,000 tonnes on each of the 13 dam piers to stabilise the dam and reinforce the spillway.<\/p>\n<\/div> This part of the project was completed in November 2014 following 10 months of uninterrupted work. It ended with the installation of uphole drains in the gallery, drilling, installation of 69 bars on the ogee and grouting<\/a> to plug the crack.<\/p>\n<\/div> Etats-Unis<\/p>\n<\/div> Nicholson Construction<\/a><\/p>\n<\/div> Grant County Public Utility District<\/p>\n<\/div> MWH<\/p>\n<\/div> Kuney Goebel JV<\/p>\n<\/div> 05\/2014 \u2013 04\/2015<\/p>\n<\/div> Key figures of the project<\/p><\/h2><\/div> Soil-cement columns built by erosion Whether it's a dam and its watertightness, a tunnel and [...]<\/p><\/div> An essential system for the stability of your structures. Soletanche Bachy uses ground anchors for [...]<\/p><\/div>Description of the project<\/h2><\/div>
Our solution<\/h2><\/div>
<\/span><\/li><\/span><\/li><\/ul><\/div>Type of project:<\/h3><\/div>
<\/a><\/span>Dam<\/h4><\/div><\/div><\/div>
Location:<\/h3><\/div>
Filiale de Soletanche Bachy :\u00a0<\/h3><\/div>
Project owner:<\/h3><\/div>
Prime contractor:<\/h3><\/div>
Main contractor:<\/h3><\/div>
Works period:<\/h3><\/div>
Types of techniques:<\/h3><\/div>
<\/a><\/span>Ground anchors<\/h4><\/div><\/div><\/div>
<\/a><\/span>Grouting<\/h4><\/div><\/div><\/div>
Related techniques<\/h2><\/div><\/div><\/div>
Grouting<\/a><\/h3><\/div>
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div><\/div><\/li>\nGround anchor<\/a><\/h3><\/div>
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div><\/div><\/li>\n<\/ul>Our projects<\/h2><\/div><\/div><\/div>
![](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/09\/CH_25012011_014_Digue-Cusset_C.Helsy-vignette.jpg\")
<\/a><\/span><\/div><\/div><\/li>\n![](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/08\/3205-Trial-First-HC05-Barge-ABS_juin17-vignette.jpg\")
<\/a><\/span><\/div><\/div><\/li>\n![](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/08\/k20120719_8155\u00a9-MVB-Andras-Nemeth_Vignette.jpg\")
<\/a><\/span><\/div><\/div><\/li>\n<\/ul><\/div><\/div><\/div><\/div><\/div>