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> Northwest Alloys, Inc.
Northwest Alloys, Inc.
Location & History
Northwest Alloys (NWA) operated a magnesium mining and refining facility in Addy, Washington between 1976
and 2001. The smelter is temporarily closed and the company completed mine closure
and reclamation requirements. NWA plans to sell the facility as an industrial site.
Current staff consists of security and environmental personnel.
Timeline
| May/June 2011 |
Ecology holds comment period and public hearing, and issues state waste discharge
permit and SEPA determination of nonsignificance |
| July 2010 |
Ecology issues final Order No 7724, allowing NWA to use commingled wastewater
to irrigate alfalfa fields on their property during the 2010 growing season |
| May - June 2010 |
Ecology holds public comment period for Order No. 7724 |
| March 2010 |
Ecology sends NWA a letter identifying a number of concerns with land
applying process wastewater from Pond 3 |
| October 2009 |
Ecology issues Order No 7147, allowing limited land application of
commingled wastewater to reduce water volumes onsite |
| Fall 2009 |
NWA installs new groundwater wells
NWA requests special allowance to irrigate fields in October and early November
2009 due to limited capacity to store commingled wastewater onsite. The onsite
ponds are full and NWA expects an additional 30 million gallons of precipitation.
Ecology finds potential for environmental harm if the ponds overflow |
| September 2009 |
Ecology reviews comingled wastewater application and send comments to NWA,
requiring the installation of additional groundwater wells and further evaluation
of the land treatment system |
| Summer 2009 |
NWA submits separate SWDP applications for commingled wastewater and Pond
3 process water |
| April 2009 |
Ecology:
- Recommends NWA submit separate SWDP applications for commingled wastewater
and Pond 3 process water
- Requests NWA temporarily discontinue land application of both wastewater
streams until new permits are issued
|
| Spring 2008 - Spring 2009 |
Ecology conducts extensive review of agronomic, soil and groundwater data |
| March 2008 |
NWA submits application to renew their SWDP |
| September 2003 |
Ecology issues NWA a SWDP by letter, allowing land application of:
- Commingled wastewater for crop irrigation on company owned land
- Process wastewater from Pond 3 once a year as a soil amendment
|
| 2001 - 2003 |
Facility temporarily closes. NWA completes mine closure and reclamation
requirements. Pond 3 wastewater is stored and managed separate of commingled
wastewater. |
| 1976-2001 |
NWA operates magnesium mining and refining facility All stormwater and
process water is recycled or reused on the plant site. |
Facility Site Number:
4
Location and Mailing address:
1560A Marble Valley Basin Rd
Addy, WA 99101
Industrial Section Permits.
Ecology Contact:
