Case Study: Milltown Reservoir Diversion


Case Study Overview

Project: Milltown Reservoir Diversion
Location: USEPA Superfund Site, MT, United States
Project Type: Shoreline Reinforcement
Application: Channel Stabilization
Product Used: ARMORMAX®

Photo showing need for river flow diversion channel.


Over 100 years of deposited mine tailings prompted the Montana DEQ and U.S. EPA to embark on a major initiative to breach the Milltown Reservoir Dam and clean up contaminated sediments. But maintaining the flow of the Blackfoot and Clark Fork Rivers called for a potentially expensive diversion channel.


ARMORMAX® 75 was used above gabion mattresses for high flows. Incorporating the ARMORMAX® 75 in the upper cross section to protect against the highest design flows minimized expensive gabion mattresses for use only in the low flow channel section.

Photo showing ARMORMAX 75 installation.



Photo showing completed diversion channel.


The result was over $1.1 million in savings, and a significant time and labor reduction.

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