Montana Department of Transportation

Malcolm “Mack” Long, Director


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Main Content


Survey of Micropile Use in Neighboring Western States

Micropiles are small diameter piles that are constructed by drilling and grouting techniques. Micropiles are a foundation alternative that are cost-effective in a variety of conditions encountered in Montana Department of Transportation (MDT) projects. While the technology was first introduced in the US in 1973, MDT’s experience with micropiles is limited. A limited experience base has led to underutilization of a potentially beneficial foundation alternative. In particular, the objective of this research project was to gain knowledge of the state-of-practice in neighboring western state transportation agencies regarding the use of micropiles for foundation support and earthen slope repair. This objective has been met by developing, conducting and compiling the results of a survey given to neighboring western state transportation agencies on the use of engineered micropiles.


Special Provisions

WSDOT Documents

Micropile image