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Army Removes Old Groundwater Treatment System

This August, the U.S. Army completed the demolition of the old Offpost Groundwater Intercept Treatment System (OGITS), which was located north of 96th Ave. along Peoria Street in Commerce City (See map). Owned and operated by the Army, the system had been used since 1992 to extract, treat, and reinject groundwater flowing north from the Rocky Mountain Arsenal.

The Army replaced the OGITS in 2022 with two smaller, modernized systems (the First Creek and Northern Pathway Systems). Once the newer systems were operational, crews removed the OGITS and recycled or disposed of the materials.

Revegetation of the site will begin this October. Groundwater treatment will continue at the RMA’s other groundwater treatment systems (identified on the map) until water leaving the site meets state and federal standards.


Please call 303.289.0300 if you have questions about the OGITS demolition project. The fact sheets linked here provide more information about the First Creek and Northern Pathway Treatment Systems.