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Water Quality Permit Program

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Water Quality Permit Program - Metal Mining Activities

This web page provides information and resources to anyone intending to conduct metal mining operations in Oregon’s streams or rivers. DEQs fact sheet, Water Quality Permits for Metal Mining Activities, describes all water quality permits required for metal mining/prospecting and ore processing operations that discharge wastewater to the land and state waters. This fact sheet includes contact information for local, state and federal agencies in Oregon that may also have requirements related to mining.

NPDES 700PM General Permit

700PM General Permit Revision
Effective May 15, 2015

DEQ regulates the discharge of wastewater from suction dredge and in-water, non-motorized mining operations that recover precious metals or minerals from streambed sediments via the 700PM NPDES general permit. For a summary of changes to the 700PM NPDES general permit that will be effective starting May 15, 2015, please see DEQ’s 700PM General Permit Fact Sheet.

The 700PM general permit does not provide coverage for these types of mining discharges:

  • suction dredges that exceed 16 horsepower or use suction nozzles with inside diameters larger than four inches in essential salmon habitat water
  • suction dredges that exceed 30 horsepower or use suction hoses with inside diameters larger than six inches outside of essential salmon habitat water
  • suction dredge discharge to waters listed by DEQ as impaired for sedimentation, turbidity or toxics (other than chlorine)
  • mining discharges to water on or adjacent to tribal lands
  • suction dredge discharges in State Scenic Waterways
  • mining outside the wetted perimeter of a stream in essential salmon habitat
  • discharges from highbanker and combination highbanker/suction dredge equipment.

A copy of the 700PM general permit and resource materials are available at any DEQ office or by using the links provided below.

How to apply for registration under the 700PM general permit

Before mining, suction dredge operators must first register. A complete application, payment of the non-refundable $25 annual fee and $150 surcharge fee are required to register in calendar year 2015. Calendar year 2015 is the last year payment of a surcharge is required.

The application requires: a list of three initial mining locations; dredge specifications and confirmation that the mining location and dredge equipment is eligible under this permit.

Operators of in-water, non-motorized mining equipment must comply with applicable permit terms but are not required to register or pay a $25 annual fee.

Operators of dredges who are ineligible for coverage or do not wish to be registered under this NPDES 700PM permit may apply for an individual NPDES permit. (See separate section further below about the individual permit.)

Summary of basic 700PM requirements and conditions (Read permit carefully for all terms and conditions)

Persons assigned to this permit may not operate a suction dredge more than 16 horsepower or with an inside diameter intake nozzle greater than four inches in essential salmon habitat.  Suction dredging is allowed only during the in-water work schedule (Timing of In-Water Work to Protect Fish and Wildlife Resources) as set by the Oregon Department of Fish and Wildlife.  Suction dredging is not allowed in state scenic waterways.  No wastewater discharges are allowed where the visible turbidity plume affects the intake of a drinking water source from any placer mining operation.  Measures must be taken to prevent the spreading of invasive species.

Suction dredges must operate at a distance 500 feet upstream from any stream segment listed as water quality limited for sedimentation, turbidity or toxics other than chlorine. The applicable 303(d) list is the 303(d) list approved or established by EPA that is in effect as of January 1 of each year.

Suction dredge operations are required to keep records and report annually.

Placer Mining on Tribal Lands

Assignment of 700PM general permit coverage does not authorize discharges to surface waters from suction dredge mining operations on tribal lands. The State of Oregon does not have jurisdiction to regulate surface water discharges on tribal lands; that authority lies with either the tribe or the U. S. Environmental Protection Agency.

In addition, assignment under the 700PM general permit does not authorize discharges from mining operations into waterways that constitute a boundary of a tribal reservation. Mining in these waters would require an individual discharge permit from DEQ to ensure that tribal water quality standards are protected.

Resource Materials for 700PM Application and General Permit

Follow the links below to find information useful for filling out an application to register under the 700PM general permit, and for complying with the permit conditions.

Other Resource Materials

You may also need a general authorization or removal-fill permit from the Oregon Department of State Lands in addition to DEQ's 700PM permit

Mining activities on federal lands must be conducted in compliance with the DEQ permit and with any additional terms or conditions established by a federal agency. Before undertaking mining activities on federal lands in Oregon, miners should contact the appropriate federal district office to see if there are any restrictions or conditions regarding mining activities or access to areas where mining will take place. Requirements may differ from one district to another.

Other Mining Discharges: Individual NPDES Permit

DEQ requires an individual NPDES permit for metal mining activities with wastewater discharges to Oregon waters that don't qualify for a 700PM permit. An individual NPDES permit is required for high bank machines or other metal mining activities located on the bank or upland and discharge to a stream or groundwater. Large suction dredges (powered or siphon/gravity) or mining activities using chemical agents (such as cyanide, flocculants) require an individual NPDES permit to discharge to state waters.

An individual permit only applies to a specific operation and location or mining claim.

Individual NPDES permit application forms and fees for new applicants:

  • OAR 340-075-0075 Permit Fee Schedule - Table 70A for application fee and Type B11-B12 of Table 70B for annual fees due with application submittal. An application must be submitted to Oregon DEQ for coverage under the Water Pollution Control Facilities 600 General Permit. Applicants will receive a signed copy of the permit after DEQ processes the application.
  • ORS 468B.052 ($300) for suction dredges with an inside hose diameter of greater than six inches but not more than eight inches
  • Land Use Compatibility Statement (LUCS) signed by the local land use authority
  • EPA Form 1
  • EPA Form 2D for new industrial process wastewater or any mixture of process wastewater, non process wastewater and/or stormwater

Individual NPDES permit renewal forms and fees (for those with a currently effective individual NPDES permit):

Small Off-Stream Mining and Ore Processing: General WPCF 600 General Permit

DEQ's general Water Pollution Control Facilities 600 permit covers sources of small-scale mining operations and non-chemical ore-processing methods with disposal of wastewater by evaporation and/or seepage. Operations must be off-stream above ordinary high-water level, and discharge to Oregon waters is prohibited.

WPCF 600 Application Form and Permit:

  • WPCF 600 Application Form
  • WPCF 600 Permit - This permit copy is provided for reference purposes only. You must submitan application to Oregon DEQ for coverage under the WPCF 600 General Permit.  Applicants will receive a signed copy of the permit after DEQ processes the application.

Large Off-Stream Mining and Ore Processing: Individual WPCF Permit

DEQ requires an individual WPCF permit for wastewater management if an owner or operator proposes a metal mining activity that processes more than 10,000 cubic yards of ore per year with no discharge to Oregon waters.

This individual permit only applies to a specific operation and location or mining claim.

New individual WPCF permit application forms and fees:

  • OAR 340-075-0075 Permit Fee Schedule - Table 70A for application fee and Type B11-B12 of Table 70B for annual fees due with application submittal)
  • LUCS signed by the local land use authority
  • DEQ WPCF-N for new industrial wastewater management with no discharge to state waters

Existing WPCF permit renewal form and fee:

Stormwater Permitting Considerations

Metal mining activity owners or operators may need to also register for permit coverage under additional general stormwater discharge permits.

For off-stream activities, miners often utilize all local water resources including stormwater to fill off-stream ponds (engineered impoundments, excavated pits or natural land depressions) to operate the high bank machine, trommel or powered sluice box. Stormwater may be diverted from mining activities to prevent contact or minimize the volume of contaminated stormwater to manage. Stormwater contacting any mining activity must be managed on site (seepage and evaporation) or an industrial stormwater discharge permit is required.

Program topics and current news is on the NPDES Stormwater Discharge Permits web page.

Industrial Stormwater General NPDES 1200-Z Permit: DEQ requires an application for this permit. The permit covers potential industrial stormwater discharges to Oregon waters from Standard Industrial Classification Code 10 (SIC 10) metal mining operations if the stormwater will contact mining materials and/or waste (such as overburden, raw material, intermediate product or waste products). DEQ requires a stormwater pollution prevention and control plan with applications for 1200-Z permit coverage.

For information, forms and the general permit for industrial stormwater discharges, visit DEQ's NPDES Stormwater Discharge Permits Industrial Activities web page.

Construction Stormwater General NPDES 1200-C Permit: DEQ requires a general NPDES 1200-C permit application for potential stormwater discharges from construction activities that will disturb one or more acres with potential stormwater runoff to Oregon waters or conveyance systems (such as a catch basin, storm drain, ditch, pipe, culvert, etc.) leading to state surface waters. Construction activities include clearing, grading, excavation and stockpiling. DEQ also requires an erosion and sediment control plan with this permit application.

For information, forms and the general permit for construction stormwater discharges, visit DEQ's NPDES Stormwater Discharge Permits Construction Activities web page.

[Small Suction Dredges/General NPDES]   [Other Prospecting/Mining Discharges]   [Small Off-Stream Mining]   [Large Off-Stream Mining]   [Stormwater Permitting]

 

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Oregon Department of Environmental Quality
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