Statement from the Joint Development Authority regarding the U.S. Army’s Optimization Study at Rice Creek Commons

31 January 2018

“The U.S. Army has released the results of an optimization study to determine how to best continue to treat TCE and 1,4 dixoane contamination in the groundwater on the site of the former Twin Cities Army Ammunition Plant.

“As a result of the study, the Army will seek approvals to make minor changes to its groundwater treatment process, including adding three wells, abandoning select wells from the perimeter of the treatment area, and adjusting pumping rates. The Army will continue to treat groundwater on the site for the foreseeable future. The Army and Rice Creek Commons project engineers will work closely together to ensure that these changes have little, if any, impact on future site development. Drinking water for the development will be provided by the City of Arden Hills and sourced by Saint Paul Regional Water Services.

“The study area covered the full Twin Cities Army Ammunition Plant site, which includes Rice Creek Commons and the neighboring Arden Hills Army Training Site (AHATS). The study also recommended changes to better treat 1,4 dioxane on AHATS.

“Determining where and how water treatment will occur on the site was a critical component needed to finalize the grading and infrastructure plans for Rice Creek Commons. Internal site construction is expected to be put out for bid in late 2018, construction is expected to begin in 2019, and housing and early commercial construction is anticipated in 2020.

“Rice Creek Commons is an incredible opportunity to create a vibrant community in Arden Hills, and it is critical that we get it right. The site is poised for revitalized development, and we are excited to be moving full steam ahead.”

-Jonathan Wicklund, Chair of the Joint Development Authority

(To request a copy of the report, contact Amy Hadiaris with the Minnesota Pollution Control Agency at