» • Weekly Update For More Information: Russ Forba, EPA 457-5042 forba.russ@epQ.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.Qov Peter Nielsen, Missoula Co. 258-4968 NielsenP@ho.missoulo mt.us Websites: http: //www.epa.QO v/ reqion8/superfund/sites/ mt/milltown http://www.cfrtac.org Milltown Reservoir Sediments Superfund Site Issue #19 June 13,2007 Status: The Milltown Reservoir cleanup project is going well and is on schedule for dam removal in spring 2008. Project workers have now logged 45,822 hours without time lost to injury. UNDER Currently: CflHsnncTtOHi • Excavation of the bypass channel continues, removing on average 3800 cubic yards (yd3) per day. Workers are now digging in two locations. Workers con- tinue to expand the footprint of the test pit, moving to the east. Now workers have also begun digging to the east where the rail road bridge will go in over the bypass channel. To date, nearly 100,000 yd3 have been removed. By the time the bypass channel is finished in late September 2007, a total of 600,000 yd3 of material will have been removed. The excavated material will be sent by rail to the Anaconda Smelter Superfund Site waste repository beginning in September 2007. • Continue to excavate and sort through landfill debris. To date, workers have re- moved about 11,500 yd3 of debris and will remove the remaining 2500 yd3 this week. • Once the landfill excavation is completed, workers will begin work on the rail grade and rail loading pad. Workers will first dig out the contaminated sediments in the bed of the Bypass Channel so the piers for the rail road bridge can be installed. • Envirocon has installed 16 dewatering wells, with another 8 going in this week. Enviro- con expects to complete installation of all 36 wells in the next 2 weeks. By the end of this week, the wells are expected to produce about 2700-2800 gallons per minute (gpm). Continue to monitor the water level in the sediments using piezometers. The dewatering wells aid in the bypass channel excavation by drying out the sediments. • Continue to work on the 1-90 toe road. • Continue to stockpile soils suitable for restoration (growth media) on site. To date, approximately 42,000 yd3 of this growth media has been excavated and stored for future use in reclaiming the land once the cleanup is complete. These weekly updates are in- tended to provide you with the latest information about remediation, restoration and redevelopment activities at the Milltown Reservoir. US EPA Montana Office 10 W. 15th St., Ste.3200 Helena, Montana 59626 1-800-457-2690 Bypass Channel Excavation ------- Friday, June 22 Design Review Team meeting to discuss new site cleanup plans. Members of the public are invited to contact their representatives on the DRT, Peter Niel- sen of Missoula County (258-4968) or Mike Kustudia/Chris Brick of CFRTAC (541-8099) to provide input to DRT. Tuesday, June 26 Milltown Reservoir Re- development Working Group meeting, 6:30- 9:00 pm at Our Savior's Lutheran Church in Bonner. Tuesday, July 3 Design Review # Team Site tour. « On June 12, the US Army Corps of Engineers (USACE) began drilling holes for the 16" shafts that will be installed to stabilize the I- 90 bridge abutments. • This week, USACE is testing its jet-grouting procedures and if all goes well, jet-grouting will begin next week. Upcoming work: Continue bypass channel excavation Continue installing dewatering wells Finish landfill excavation Begin rail loading pad and rail grade Screen borrow materials for loading pad and rail road grade construction USACE contractors test jet-groutirig for 1-90 bridge abutment stabilization PROJECT SCHEDULE 2007 Build haul roads Build flood berms 1-90 bridge mitigation MRL bridge mitigation Build bypass channel Build pedestrian trail Construct rail lines Rail hauling sediment Stage 2 drawdown Build coffer dam Spillway removal 2008 Spillway removal Sediment removal Replace Hwy 200 bridge Dam removal Powerhouse removal Restoration Redevelopment 2009 Restoration Redevelopment 2010 Restoration Redevelopment 2011 Restoration cr-C--: Redevelopment EPA and DEQ met with representatives from Missoula Co., LS Jensen Construction, MRL, Bonner School, and the Milltown Bon- ner Community Council to coordinate con- struction of the and work this summer. Trail work begins next week. The portion from the Hwy. 210 bridge to Fire Station should be complete by mid-July and the trail from the bridge to Bonner School complete by mid- August. MRL plans to work on the rail line from mid-July to mid-August. While we agreed that it is best to minimize any over- lap between these projects, there still may be a time when pedestrian access is re- stricted. We will continue to keep the com- munity informed as we learn more. ------- |