Draft Design Report Details the Beginning of the End for the Milltown Superfund Cleanup

April 1, 2009


The newly released Stage 3B draft final design report (PDF) explains how Envirocon will wrap up the remediation work at the Milltown Reservoir Superfund site. Envirocon, the EPA’s contractor for the Superfund cleanup, is charged with removing the Milltown Dam and more than two million cubic yards of contaminated sediment from the Clark Fork River flood plain. Much of that work, Stages 1, 2, and 3A, is already complete.

The current report, for the final stage, 3B, is a 90 percent finished product and offers details on the:

* removal of remaining sediments in the former reservoir and the rail spur used to haul them
* implementation of the state’s grading plan for restoration in the remedial area
* backfilling and regrading the bypass channel and stabilizing the I-90 embankment
* protection of contaminated sediments remaining in the floodplain (Area 3B)
* closure of the dam debris repository and borrow area reclamation

The Stage 3B work is scheduled to start this month and be completed in 2011 or 2012.

Milltown Design Review Team meets April 7 to review the document. CFRTAC, along with Missoula County, is a public representative on the team. For more info, call CFRTAC at 541-8099.

The report can be viewed at Envirocon’s public FTP site, the online repository for all the Milltown project construction documents. Click on the above link and an ftp session should open in your internet browser (e.g. Internet Explorer, Netscape, etc).

1. You should see the folder “Stage 3B DFDR”. Open the Stage 3B DFDR folder and the pdf files of the report will appear.

2. Drag and drop the files from the ftp window to your desktop (or other directory where you would like the files to reside) and allow them to download to your computer.

3. Do not attempt to open the files directly from the ftp window.

If you have any problems downloading these files call Sue Hepburn in EMC2’s Bozeman office at 406-522-0251 for technical support.
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