NV-063-EA06-098

From Open Energy Information


NEPA Document Collection for: NV-063-EA06-098
EA at Reese River Geothermal Area for Geothermal/Exploration

Reese River Valley Geothermal Exploration Project Environmental Assessment

Proposed Action

Cayley Geothermal, Inc. (Cayley) is proposing to conduct the Reese River Valley Geothermal Exploration Project (Project), a geothermal resources exploration program of temperature gradient hole (TGH) and slim well drilling and testing on public lands leased for geothermal resource development in Lander County, Nevada (Figure 1). The area to be explored (Project area) consists of portions of federal geothermal leases NVN-78687, NVN-77247, NVN-78688, and NVN-76676. The Project area (see Figure 2) covers the entirety of Sections 32 and 33, and the W½ of Section 34, and SW¼ of the SE¼ of Section 34, Township 24 North, Range 43 East (T24N, R43E), Mount Diablo Baseline and Meridian (MDB&M); and the W½ of the W½ of Section 3, the entirety of Sections 4 and 5, the E½ of Section 6, and the N½ of the N½ of Sections 8 and 9, T23N, R43E MDB&M.

The Project (Proposed Action) includes (see Figure 3):

  • Drilling up to eight temperature gradient holes (including the improvement, reconstruction or construction of access roads, as necessary), each to a depth of either 300 or 1,000 feet and measuring the temperature profile in each TGH; and
  • Constructing drill pads on up to three of seven sites (including the improvement, reconstruction or construction of access roads, as necessary), drilling and completing a small-diameter (slim) well to a depth of about 4,000 to 5,000 feet from each of the three constructed drill pads, and flow-testing each completed slim well to obtain samples of the geothermal fluid and production information from the geothermal reservoir.

The total estimated area of new surface disturbance required for construction of the drilling pads and access roads would be a maximum of approximately 9.68 acres (see Figure 3)


Data Completion Notes

Argonne has EA file - maybe in NGDS?

8/9: Data entry complete.

KERMIT: Cayley Geothermal, Inc is the applicant. Have they changed to Sierrra Geothermal Power? Yes effective 4/11/07

Application date in Serial Register is after the decision date, so this may be the wrong serial register. SRP is for a NOI for a TG Well Tiered from EA,

10/31/13: Earlies NOI for TGW is 5/8/2006 SRP NVN-0832316, GDPs' 6/16/2006

When I saved edits the EA file disipeared form the page?

Documents

Serial Register Page:





FONSI:


 

<metadesc> : NEPA document related to geothermal resource areas </metadesc>

Resource Analysis

Resource Not
Present
Present,
Not
Affected
Present,
Potentially
Affected
Not
Indicated
Comment Applicant
Proposed
Mitigation
Agency
Imposed
Mitigation
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.

Project activities could contribute to the spread of invasive, nonnative species within the Project area through the proposed surface disturbing activities and the number of construction and drilling vehicles involved.

 
CloseCayley has committed to comply with special lease stipulations which require that seed mixtures used to re-vegetate disturbed areas be “weed free;” that an invasive, nonnative species control program consisting of monitoring and eradication for species listed on the Nevada Designated Noxious Weed List be implemented; and that all vehicles, heavy equipment, and the boots of operators and other persons working in the areas be cleaned by water before entering public lands to do work.
Migratory Birds
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

Project construction (regardless of the season constructed) would result in the direct loss of up to 9.68 acres of potential migratory bird habitat.

 
CloseCayley has committed to comply with special lease stipulations to conduct inventories for

migratory bird nests and limit ground disturbing activities if conducted during the migratory bird-nesting season. Implementation of these stipulations would avoid the potential for violation

of the Migratory Bird Treaty Act.
Native American Concerns
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

 

   
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.

 

 
CloseEach area proposed for any new surface disturbance, including an appropriate buffer, would be surveyed by a professional archeologist acceptable to the BLM, and the results of this survey reported to the BLM with the request to commence surface disturbance. Drill pads would be constructed in such a way so as to ensure that recorded archaeological site materials are inventoried, documented and reported to the BLM, and a determination of their eligibility for the National Register of Historic Places and appropriate mitigation, if any be completed by the BLM prior to disturbance to the site. To ensure that identified cultural resource sites adjacent to areas of disturbance are not disturbed, the limits of surface disturbing activities, including an adequate buffer zone, would be clearly marked and flagged prior to the start of all grading or other surfacedisturbing activities. The flagging would be set with the assistance of a professional archaeologist, and the construction/grading contractor and each of the workers would be trained to understand the flagging and its importance. BLM may determine that an

on-site monitor is necessary.

If previously unrecorded cultural resources are encountered during grading or other surface-disturbing activities, all grading or other surface-disturbing activities at the location of the discovery would cease, and the BLM would be notified. Grading or other surface-disturbing activities would not recommence at the location of the discovery until the identified cultural resources(s) have been assessed, any necessary mitigation actions taken, and the expressed approval of the BLM granted.
Visual 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.

The total estimated area of new surface disturbance required for construction of the drilling pad and access roads would be less than 9.68 acres.

 
CloseWellhead equipment left on the drill site following the completion of drilling would be painted a color, subject to approval by the authorized officer that would blend with the landscape. Prior to painting, Cayley would contact the Battle Mountain Field Office project lead.
Air 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.

Fugitive dust would be generated from earth-moving activities and travel on unpaved roads during drill pad and road construction and drilling activities, but the amount of land disturbed is below the level for which fugitive dust is regulated by the BAPC.

CloseBased on implementation of environmental protection measures specified by Cayley, water would be applied to the ground during the construction and utilization of the drill pads and access roads as necessary to control dust. The dust which could be generated when drilling with air would be controlled by a separator/muffler, and only the air and water vapor would be discharged to the air.
 
Areas of Critical Environmental Concern
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

The proposed Project is not located in or near any ACECs (Ordaz 2006).

   
Environmental Justice
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

There are no environmental justice issues associated with the Project Area (Ordaz 2006)

   
Floodplains
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

There are no FEMA-designated 100-year floodplains in the Project area (FEMA 2006).

   
Prime or Unique Farmlands
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

The proposed Project is not located in or near any prime or unique farmlands (Mallory 2006a).

   
Special Status 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.

Project surface disturbing activities could result in the lost of up to 9.68 acres of potential special status species habitat.

 
CloseHuman activity within view (or within at least 0.5-miles) of sage grouse leks, especially between midnight and 10:00 a.m., shall be minimized between March 1-May 15. Sage grouse nesting and brood rearing areas shall be avoided by 0.5-miles between April 1-August 15. Sage grouse wintering areas shall be avoided by 0.5-miles while occupied. Vegetation disturbance shall be minimized in all known sage grouse habitats.

Active ferruginous hawk nests shall be avoided by 0.5-miles between March 15-July 1

All areas proposed for surface disturbing activities shall be surveyed for the pygmy rabbit by a qualified biologist acceptable to the BLM prior to commencement of

construction.
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.

Substantial quantities of diesel fuel, and smaller quantities of lubricants, hydraulic fluids and drilling chemicals (drilling mud, caustic soda, barite, etc.), would be transported to, stored on and used by the Project at the proposed drill sites

   
Wetlands and Riparian Zones
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

The proposed Project is not located in or near any wetlands and/or riparian zones (Crimmins 2006)

   
Wilderness
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

The proposed Project is not located in or adjacent to any wilderness areas or wilderness study areas (Perrin 2006b).

   
Wild and Scenic Rivers
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

The proposed Project is not located in or near any wild and scenic rivers (Ordaz 2006).

   
Geology and Minerals
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

As there are no geologic hazards, no active mining claims and no known deposits of salable or leaseable minerals within the Project area other than the geothermal resources leased to Cayley, the Project would have no effect on geology and minerals.

   
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.

The Project would disturb as much as 9.68 acres.

CloseBMPs

Road Slope and Spoil Disposal Area Stabilization Identify soil environmental site factors and their variance along the roadway. Determine the proper seed/fertilizer mixture to stabilize roadway slopes and waste spoil areas.

Mechanical stabilization should be accomplished in highly erodible soils using geotechnical materials, jute netting, punched straw or other proven technique.

In areas of highly erodible soil, windrow clearing debris at the base of the fill slopes to mitigate erosion.

Road Slope Stabilization For cut slopes, allow them to be left as steep as possible to minimize the surface area subject to erosion. Do not lay the slopes back.

Control of Road Drainage For roads within highly erodible areas, use insloped roads only in cases where maintenance can be performed on a regular basis. All other roads should be outsloped.

For highly erodible soils, inslope and ditch fill sections with culverts in order to prevent water from flowing down the face of fills.

Berms may be used to direct water to overside drains, if available.

Culvert headwalls should be constructed for perennial or intermittent stream crossings in highly erodible soil areas using riprap, soil cement, concrete, in order to prevent erosion.

Energy dissipators should be used in areas of water concentration, where significant erosion will result

Construction of Stable Embankments (Fills) and Culvert Backfill In highly erodible soil areas, the larger and more critical fills should be compacted to 95% of AASHTO T-99 specification. Fillslopes should be constructed at 1½ to 1. For fills compacted through layer placement along, fillslopes should be constructed at 1¾ to 1. No fills will be constructed on side slopes exceeding 55%.

For areas designed to have compacted fills and having slopes exceeding 40%, terrace the natural slope to key in the fill.

Care should be taken to compact the outer edge of the fill in highly erodible soil areas using a sheeps-foot type roller or other approved techniques.

Maintenance of Roads In highly erodible soil areas, special attention should be paid to maintaining road drainages, including surface drainage configuration, culverts and overside drains for roads having all levels of maintenance. Cut slopes should not be undercut and drainages should be kept open, clean and functioning.

Road Surface Treatment to Prevent Loss of Materials

For road construction in areas having highly erodible soils, full-width stabilization, including the ditch, should be performed using aggregate, asphalt concrete, penetration oil treatment or other approved methods that will achieve long term stabilization of the road bed. Stabilization methods should be designed to exceed normal use so erosion control devices remain effective well past the intended use. Stabilization should be considered for road segments adjacent to or crossing sensitive streams, grades exceeding 6% and for areas having sideslopes in excess of 30%.
 
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.

All surface-disturbing activities from the Project would result in the loss of up to 9.68 acres of these common plant communities.

 
CloseSeeding of disturbed areas associated with the range sites would be completed using the a BLM approved native seed mixture and application rate. Any variance in the mix would be coordinated first with the BLM Battle Mountain Field Office.
Wildlife 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.

The Project would result in the loss of approximately 9.68 acres of wildlife habitat.

   
Fisheries 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.

The proposed Project is not located in or near any fisheries (Mallory 2006c).

   
Range 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.

This Project would disturb up to 9.68 acres, a small portion of the 63,663.8846 total acres within the allotment.

   
Recreation
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

The Project does not propose any activity which would prevent continued access by recreational users to the public lands within the Project area.

   
Social Values
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

No social values would be affected by the proposed Project.

   
Economic Values
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

The construction/drilling workforce is expected to consist of up to five workers for the TGH drilling and up to 10 workers for the slim well drilling.

   
Lands and Realty
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

There are no rights-of-way or other land use authorizations in the Project Area (Lahr 2006)

   
Wild Horse and Burro Management
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

The Project would result in the loss of up to 9.68 acres of wild horse and burro habitat, constituting less than 1% of the New Pass/Ravenswood HMA.

   
Water Quantity
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

The Project would have little potential for adversely affecting the quality of either surface waters or ground waters in the Project area.