DOI-BLM-OR-P000-2010-0003-EA

From Open Energy Information


NEPA Document Collection for: DOI-BLM-OR-P000-2010-0003-EA
EA at Newberry Caldera Geothermal Area for Geothermal/Exploration

EA for Drilling, Testing and Monitoring of up to 12 Temperature Gradient / Passive Seismic Geothermal Exploratory Wells at Newberry Caldera Geothermal Area for Geothermal/Exploration

Proposed Action

Davenport Newberry Holdings LLC proposes the drilling, testing, and monitoring up to twelve temperature gradient / passive seismic geothermal exploratory wells on federal geothermal leases.


Data Completion Notes

Data entry complete.

Documents

FONSI:


 

Resource Analysis

Resource Not
Present
Present,
Not
Affected
Present,
Potentially
Affected
Not
Indicated
Comment Applicant
Proposed
Mitigation
Agency
Imposed
Mitigation
Soils
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

 

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Locate sites away from the immediate vicinity of surface waters, SMZs and floodplains.

To avoid unwanted impacts to soil resources, use existing compacted sites such as landings, skid-trails, truck turn-arounds, or road surfaces for drilling sites when possible.Avoid unstable slopes and sensitive soils.

Avoid steep slopes requiring cut-and-fill excavation and site leveling.
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Reclaim disturbed areas soon after completing project work.

Where previously un-compacted sites are used; subsoil drill pad sites that have become detrimentally compacted upon project completion (TG29N, TG19N, TG32S, andTG16S).

Subsoil drill pad sites that are developed in plantations where subsoiling occurredpreviously (sites TG19N, TG12S, TG7S)

Where previously un-compacted sites are used; salvage and stockpile topsoil materials and coarse woody debris (CWD) that are scraped or excavated from the surface as aresult of grading and site development. Re-apply and contour topsoil materials and any CWD back onto the site after project completion for restoration (TG29N, TG19N, TG32S, and TG16S).

Recountour any excavated soil materials resulting from site leveling on gentle ormoderate slopes (sites TG7S).

Revegetate or otherwise stabilize salvaged topsoil to minimize erosion and maintain soilfertility.

As directed by the Forest Service, where larger live green trees are removed, retain the boles and distribute onto the site as course woody debris after project completion.

Decommission non-system or new roads that may be used for drill site access after project completion (TG12S).
Vegetation
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

 

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Minimize the disturbance footprint.

Minimize disturbance or removal of adjacent vegetation to promote rapid vegetation

recovery or regrowth after project completion.
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No trees will be cut until marked by a Forest Service representative Current cutting spec for LP and PP saw is 7.0" d.b.h to a 6.0" top d.i.b. and a 8 foot minimum length.

Biomass specs are currently 4.0" d.b.h. to a 2.0" top d.i.b. and a 16 foot minimum length.
Water Quality
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

 

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Use proper erosion and stormwater control practices during site development and project implementation.

Properly manage all exploration-related wastes to protect groundwater and surface water quality.

Prevent drilling mud, bentonite clay, industrial oils and fuels, and potentially sulfur-laden water from transport off-site, into a ground water source, or a drainage feature on a road.

Use portable tanks to contain drilling fluids and exhumed water to the extent feasible.
 
Wastes Hazardous or Solid
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

 

CloseProperly contain and dispose of any hazardous or toxic materials. A condition of the permit will be a spill-prevention and containment plan. Dispose of non-toxic tailings or drilling mud only at approved sites. Approved disposal sites should be on nearly level ground (ex. existing rock pits). Avoid sites near existing surface water features and areas where ground water is close to the surface, including seasonal high water tables.
 
Fire Resources
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

 

 
CloseFire precaution measures will be in place and in accordance to Forest Service Industrial Precaution Level (IFPL) fire prevention program for the Central Oregon Fire Management Service (COFMS). Fire extinguishers and tools will be kept on site at all times and with each vehicle. Communication will be maintained and emergency services will be contacted in the event of an emergency. An operating plan for emergency notification needs to be in place prior to implementation. All slash will be disposed of by the Forest Service and to their specification by Forest Service personnel and financed by the proponent.
Invasive, Nonnative Species
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

 

 
CloseDavenport will be responsible for conducting annual June weed monitoring visits to ensure that weeds do not become established on the drilling sites. If weeds are found, the applicant will hand-pull them and bag them if flowers or seeds are present. The applicant will provide the Forest Service a brief annual report that shows compliance with this mitigation.

Davenport will be responsible for monitoring the area for two growing seasons after thework is done. For example, if the work is completed in the winter of 2010/2011, the applicant will monitor in the summers of 2011 and 2012. Weed monitoring will begin thefirst June after the project has been completed; it is strongly encouraged that the monitoringoccurs at this time rather than later in the summer because the weeds will still be small and not flowering or producing seed. Davenport will be released from further responsibility forweeds within the project area after the second year of monitoring/treatment is concluded.

The annual weed monitoring report will be due no later than September 30, will includedescriptions of when they monitored, what weed species, if any, were found, and that theywere treated. Hand-pulling will be the treatment. Herbicide application will not be an option for this area, as herbicides have not been approved for use.

Drill rigs, tanker trucks, trailers and any other heavy equipment shall be pressure washed in LaPine prior to their first entrance into the project area, and prior to any subsequent entrance after leaving the project area.E
Cultural Resources
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

 

 
CloseAn archaeologist will be present during the drilling operation(s) to monitor for any inadvertent heritage resources. Any inadvertently discovered cultural items or sites encountered during the drilling operations by project archaeologist will be protected until evaluation can be completed by the Forest Service archaeologist.