Weekly
Update
or More Information:
Russ Forba, EPA
457-5042
forba.russ@epa.qov
Diana Hammer, EPA
457-5040
hammer.diana@epa.qov
Keith Large, MT DEQ
841-5039
klarqe@mt.qov
Doug Martin, MT NRDP
444-0234
dmartin@mt.gov
Peter Nielsen, Missoula Co.
258-4968
Nielsen Pİ ho.missoula.mt.us
Websites:
http://www.epa.gov/
reqionS/superfund/sites/
mt/milltown
http://www.cfrtac.org
Milltown Reservoir
Sediments
Superfund Site
Issue #47
k
February 14,2008
Only the head wall and the blue penstocks remain from the old Powerhouse, 2/12/08
Milltown Reservoir1
Community Office
(315 Anaconda St., Milltown, MT)
Winter Office Hours:
Tuesdays 1:00-3:00 pm
EPA and DEQ staff are available;
Stop by to talk
or say hi!
These weekly updates are intended
to provide you with the latest infor-
mation about remediation, restora-
tion and redevelopment activities at
the Milltown Reservoir.
US EPA Montana Office
10 W. 15th St., Ste.3200
Helena, Montana 59626
Status: Removal of the Milltown
Powerhouse is underway! Diversion
of the Clark Fork River into the by-
pass channel and breaching of the
Powerhouse coffer dam are set for
mid-late March 2008. Project per-
sonnel have worked 128,146 hours
without time lost to injury.
Currently.
The brick walls of the Power-
house have been removed; all
that remains is the concrete
"head" wall.
Workers are installing sheet piling
upstream of the Powerhouse
Removal of the right abutment
wall of the Milltown Dam struc-
ture will resume along with re-
moval of the dam head wall (concrete wall in photo) when the Powerhouse coffer dam is com-
plete. Demolition should take about 2 weeks and be complete in late February 2008.
Continue loading 45 rail cars each day with excavated sediment for transportation to the
repository at the Anaconda Smelter Superfund Site. 449,876 tons (391,197 cubic yards) of
sediment have been hauled to the Anaconda Smelter Superfund Site for disposal. Site stockpiles
are nearly depleted; soon Envirocon will resume excavation of contaminated sediments
Resumed work on the bypass channel berm; recent warm weather sped up progress. The berm
is now complete from the west end to the rail bridge; the inlet area should be done in February.
Continue to line the Bypass Channel with reno mattresses and TRM. The lining will protect
the bypass channel from erosion. Installation of the reno mattress is 89% complete; TRM is 74%
complete. All the bypass channel liners should be in place by the end of this month.
Excavation of the Bypass Channel inlet is complete. Workers will now install grade control
structure, Reno Mattresses, and TRM. The inlet should be complete in the next two weeks.
Bypass Channel Outlet grade control structure and work pad are complete; workers are now ty-
ing bypass channel erosion control lining into the grade control structure.
Trucks continue to haul rock per day to supply materials for lining the bypass channel and rip
rap for the upstream coffer dam. Rock is being hauled to the site from the east and west.
Twenty four dewatering wells are producing 2455 gallons per minute (gpm), of which, 2195 gpm
are discharged into the Clark Fork River and 260 gpm are discharged to the Blackf oot River.
1-90 Bridge: USACE is removing barges from the Blackfoot River. Of the 90 original barges,
all but 12 have been removed. Each day, six trucks carrying barges are guided by a pilot car out
along Tamarack Road and onto Highway 210. All barges should be out by Monday, 2/18/08.
Highway 200 Bridge: MDT and its contractors continue to make good progress; workers are
removing the superstructure of the bridge. The new bridge should be in place this fall.
Pedestrian Bridge: Missoula County continues to remove the old pedestrian bridge. The new
"hybrid" bridge should be in place this fall.
-------
Thurs. February 21
EPA and Montana Trout
Unlimited are hosting
an informational meet-
ing for Fly-fishing
Guides, Outfitters, Fly
Shop Owners, and
other river users.
6:30-8:30 pm in the
Missoula City Council
Chambers (140 W. Pine)
Tuesday, February 26
Milltown Redevelop-
ment Working Group
monthly meeting,
6:30-9:00 pm at Our
Savior's Lutheran
Church in Banner.
Weds. March 12
EPA/DEQ Project
Update Open House
(5:30-6:30 pm) and
Public Meeting (6:30-
8:30 pm) in the Banner
School Gym. EPA will
provide an update re:
cleanup activities, di-
version of the Clark
Fork River; Breach of
the coffer dam; Fish-
eries impacts; Ground-
water modeling; Well
program; Restoration;
and Redevelopment!
Juestions/discussion.
ty reasons, the PROJECT
ncluding the nearby rivers,
is CLOSED TO THE PUBLIC.
A posted guard will allow
ly authorized personnel on site.
To view on-going activities:
http://www.clarkfork.org/programs/milltown.html
Made possible by donations from Envirocon, MRL, and Modern Machinery
coming work:
Continue bypass channel berm construction up-
stream of the rail bridge
Continue reno mattress and TRM installation
Continue hauling rock for bypass channel liner
Continue removal of the right abutment/head wall
Install grade control structure at inlet
Finish Powerhouse coffer dam
Begin dewatering coffer dam
USACE removing barges from the Blackfoot River
MDT continues work on the Hwy 200 bridge
County continues work on the Pedestrian bridge
EPA continues its local well programs
PROJECT SCHEDUU
2008
2009
Build coffer dam
MRL bridge mitigation
Powerhouse removal
Stage 2 drawdown
Sediment removal
Rail hauling sediment
Replace Hwy 200 bridge
Replace walking bridge
Spillway removal
Sediment removal
Raul hauling sediment
Oil
Restor
Redevelopment
Restoration
Redevelopment
Restoration
Redevelopment
Removing barges from the Blackfoot River, 2/12/08. The 90
barges created a work platform during 1-90 bridge mitigation.
Installation of sheet piling as part of the coffer dam upstream
of the Milltown Powerhouse, 2/12/08.
2/12/08, Tying bypass channel liner into the grade control structure at the
bypass channel outlet. In a few weeks, the Clark Fork River will be diverted
into this channel, isolating the river from the contaminated sediments.
------- |