NEPA Document Collection for: DOI-BLM-NV-CO10-2011-0501-EA
EA at Patua Geothermal Area for Geothermal/Well Field
EA for Phase II Production Wells and Thermal Gradient Holes at Patua Geothermal Project for Geothermal/Well Field
GRI is proposing to design, construct, and operate geothermal well pads and wells, geothermal fluid pipelines, and their associated access roads. These facilities would be connected to the previously proposed geothermal power plant for the Patua Phase I project or to a new nominal 60MW net geothermal power generation facility, to be located on one of two privately owned sections of land within the Unit. The power plant could be located adjacent to the existing Patua Phase I power plant, or in Section 29, T20N R26E. The elements of the proposed action include:
•Reclamation‐managed lands – Drill 3 new temperature gradient holes (TGHs)(no vegetation removal required) – Construct 14 new well pads and drill multiple wells (57 acres disturbance) – Construct approximately 10.5 miles of geothermal fluid pipeline and access roads (159 acres of temporary disturbance and 159 acres of permanent disturbance) – Construction of 1.51 miles of new transmission line if a power plant is built south of Alt 50 (18.3 acres disturbance, assuming a 100‐foot corridor)
•BLM‐managed lands – Drill 1 new TGH (no vegetation removal required) – Construct five new well pads and drill multiple wells (22 acres disturbance) – Construct approximately 2.2 miles of geothermal fluid pipeline and new access road (40 acres of temporary disturbance and 40 acres of permanent disturbance) •Private land
– Construct approximately 1.1 miles of new access road and geothermal fluid pipeline (33 acres of temporary disturbance and 33 acres of permanent disturbance) – Construct nominal 60 MWnet geothermal power generation facility and generation substation (29 acres permanent disturbance) – Construction of 0.8 miles of new transmission line if a power plant is built south of Alt 50 (9.7 acres permanent disturbance, assuming a 100‐foot corridor plus 32 acres of temporary disturbance for staging)
The project area is shown in Figure 1.1‐2. The total area of disturbance for the project would not exceed approximately 620 acres. Table 2.1‐1 and 2.1‐2 list the estimated total disturbance areas by component and land management/ownership. This amount of estimated disturbance in Table 2.1‐1 and 2.1‐2 is much greater than what will likely occur, as generous disturbance corridors for roads and pipelines have been assumed. A 300 foot wide corridor has been assumed for the pipeline and roadways across the entire project area. This corridor has been assumed in order to accommodate some expansion joints and turnouts, which could have a maximum width of 300 feet(assuming 150 feet would be temporary disturbance and 150 feet of permanent disturbance). In most locations, the width of permanent disturbance of pipeline and roads would only be an estimated 30 feet and temporary disturbance would be considerably less than 300 feet. Therefore, the total project disturbance will likely be significantly less than 620 acres.
Upon completion of the analysis and decision, GRI would begin development of the proposed project components. Development would begin with wellfield development, including access roads, well pads, and wells. The second stage of development would include construction of the power plant and transmission line (if necessary), and associated piping. Once construction is finalized, utilization, and power generation would begin. This EA also addresses decommissioning of the project.
Conditions of Approval
May 2012 Gradient Patua II Geothermal Exploration and Utilization Plan CONDITIONS OF APPROVAL (COAs) Term: The term is for two (2) years from the date of approval, but may be extended by BLM. The term is intended to be commensurate with the Nevada NRS 534A.070
Please Note: All lease and/or unit operations will be conducted in such a manner that full compliance is made with applicable laws, regulations (43 CFR parts 3200, 3260 and 3280), lease/agreement terms, Geothermal Resource Orders, Notice to Lessees (NTLs), the Approved Plan of Operation and this permit.
A complete copy of the approved application and these conditions shall be maintained on location during all construction and drilling operations. Deviation from the approved plan without prior approval is not allowed.
The operator is fully responsible for the actions of his subcontractors. Operators have the responsibility to assure that activities authorized by this permit are conducted in a manner that complies with other applicable Federal, State, and local laws and regulations.
Approval of this application does not warrant or certify that the applicant holds legal or equitable title to those rights in the subject lease which would entitle the applicant to conduct operations thereon.
Failure to comply with the provisions of this permit, including applicable regulations, stipulations, and/or approval conditions, will be considered a violation, subject to the enforcement provisions of 43 CFR Subpart 3277.
Required Notifications 1. The operator and contractor shall contact the BLM, Stillwater Field Office- (775) 885-6115, and the Bureau ofReclamaion-(775) at least 48 hours prior to commencement of access and site construction or reclamation activities.
2. The operator shall contact the BLM PET at least 24 prior to the following operations: Spudding, Running and cementing of all casing strings, and BOP(E) tests.
3. In any emergency situation, after hours authorization may be obtained by a field office authorized officer listed above.
Pre-Construction 1. All access roads will be constructed and maintained to BLM road standards (BLM Manual Section 9113)
2. Proposed surface disturbance and vehicular travel will be limited to the approved well location and access route
3. Any changes in well location, facility location and access or site expansion must be approved by the authorized officer in advance.
4. Any changes in well location, facility location, and access or site expansion must be approved by the authorized BLM officer and Reclamation in advance.
5. The underside of all heavy equipment will be cleaned by water before entering federal lands to do work. Driving through or parking on noxious weed infestations will be avoided.
Well Pad and Facility Construction 1. A site diagram depicting the location of production facilities, recontoured slopes and stabilization measures shall be approved by an authorized officer prior to installation of production facilities.
2. The design of all facilities, including well pads, roads, pumps, and pipelines, shall be approved by the authorized BLM officer in consultation with Reclamation prior to construction to avoid unnecessary conflicts with visual resources management objectives.
3. Drainage from the disturbed areas will be confined or directed so that erosion of undisturbed areas is not increased. In addition, no runoff water (including that from roads) will be allowed to flow into intermittent or perennial waterways without first passing through a sediment-trapping mechanism. Erosion control structures may include: waterbars, berms, drainage ditches, sediment ponds, or other devices.
4. Access road construction for exploratory wells should be planned such that a permanent road can later be constructed in the event of field development.
5. Construction of access roads on steep hillsides and near watercourses will be avoided where alternate routes provide adequate access.
6. Access roads requiring construction with cut and fill will be designed to minimize surface disturbance and take into account the character of the landform, natural contours, cut material, depth of cut, where the fill material will be deposited, resource concerns, and visual contrast.
7. To maintain esthetics values, all semi-pennanent and permanent facilities will be painted to blend with the natural surroundings. The Standard Environmental Colors will be used for color selection.
8. As required, fill slopes surrounding culverts will be rip-rapped with a well graded mixture of rock sizes containing no material greater than two feet or smaller than three inches. The ratio of the maximum to minimum dimension of any rock shall not exceed 6:1.
9. Water turnouts needed to provide additional drainage will be constructed not to exceed two percent slope to minimize soil erosion.
10. Well site layout should take into account the character of the topography and landform. Deep vertical cuts and steep long fill slopes should be avoided. All cut and fill slopes should be constructed to the least percent slope practical.
11. Trash will be retained in portable trash cages and hauled to an authorized disposal site for disposal. Burial or burning of trash will not be allowed unless done at an authorized site.
12. No drilling or storage facilities will be allowed within 650 feet of any pond, reservoir, canal, spring or stream. Other protective areas near water may be required to protect riparian habitiat and T&E species.
13. Springs and water developments on public lands may be used only with the prior written approval of the authorized BLM officer in consultation with Reclamation and the water rights holder.
14. To maintain esthetics values, all semi-permanent and permanent facilities will be painted to blend with the natural surroundings. The Standard Environmental Colors will be used for color selection.
15. Fences shall not be cut without prior approval of the authorized BLM officer and Reclamation. Before cutting through any fences, the operator shall firmly brace the fence on both sides of the cut; a temporary gate will be installed for use during the course of operations, unless the fence is immediately repaired. Upon completion of operations fences shall be restored to at least their original condition.
16. The depth of surface soil material to be removed and stockpiled will be specified by the authorized BLM officer in consultation with Reclamation. If topsoil is stockpiled for more than one year, the stockpile shall be seeded or otherwise protected from wind and water erosion. The stockpile shall be marked or segregated to avoid loss or mixing with other subsurface materials. Any trees removed will be separated from soils and stockpiled separately.
17. Mud, separation pits and other containments used during the exploration or operation of the lease for the storage of oil and other hazardous materials shall be adequately fenced, posted or covered.
18. Lessee/operator shall comply with all regulatory requirements for storage and handling of hazardous materials and wastes.
19. If historic or archaeological materials (other than human remains) are uncovered during construction, the operator is to immediately stop work that might further disturb such materials, flag the cultural resource for avoidance, and contact the authorized BLM officer. Within five working days the authorized BLM officer will inform the operator as to:
a. whether the materials appear eligible for the National Register of Historic Places;
b. the mitigation measures the operator will likely have to undertake before the site can be used (assuming in situ preservation is not necessary); and,
c. a time frame for the authorized BLM officer to complete an expedited review under 36 CPR 800.11 or other applicable Programmatic Agreement, to confirm, through the State Historic Preservation Officer, that the findings of the authorized BLM officer are correct and that mitigation is appropriate.
20. If human remains are exposed at any time during the course of the project, work shall cease within 100 meters (330 feet) ofthe find and the remains shall be protected from further damage or exposure. If the remains are on lands managed by the federal government, the BLM must be notified immediately. The BLM will assume responsibility for coordination with local authorities, NSHPO, and appropriate tribes for discoveries on federal land. Local authorities will determine whether the remains are of an unrecorded dead body as defined by Nevada statues (NRS 440.020) and whether the remains are part of a crime scene. If the remains are part of a crime scene, local law enforcement shall assume jurisdiction and responsibility, and NSHPO, BLM and Reclamation for federal lands, will be immediately notified, by telephone or in person. This notification will be followed by a written notification. Work will not resume until authorized by the local authorities. If the remains are Native American, the federal agency will follow the procedures set forth in 43 CPR 10, the Native American Graves Protection and Repatriation Act.
21. No surface use will be permitted within 0.6 miles of occupied raptor aeries (nests) during the nesting and fledging period.
22. Fences shall be flagged with bright colored flagging at least every rod from visibility to wild horses. All fences should be constructed using green steel posts with white or silver tops to increase visibility. Fences should also avoid obvious horse migration routes (deep trails, stud piles) if at all possible.
Hydrologic Monitoring 1. A hydrologic monitoring program would be instituted once exploration activities commence; the details of which are to be site specific and the intensity commensurate with the level of exploration. Monitoring activities would include reporting the number of aquifers encountered, their properties, their quality, and their saturated thickness. This information would be submitted to the BLM SFO in a timely manner. The evaluation program may include the quality, quantity, and temperature of any hot springs or other water resource within the project area.
Field Operation 1. Reserve pits and impoundments on well pads containing liquids would be excluded from wildlife access by fencing, netting, or covering at all times when not in active uses, in accordance with the Gold Book standards (BLM and USFS 2007). Escape ramps are required for all reserve pits and impoundments so that wildlife inadvertently entering the pit will be able to climb out. Should wildlife exclusion standards as denoted in the Gold Book not be adequate in preventing an over occurrence of wildlife mortalities, more stringent Nevada Department of Wildlife (NDOW) standards for fencing, netting, bird balls, escape ramps, reservoir slope (4:1 horizontal and 2:1 vertical) and woven mesh wire could be considered.
2. Operations shall be done in a manner which prevents damage, interference, or disruption of water flows and improvements associated with all springs, wells, or impoundments. It is the operator's responsibility to enact the precautions necessary to prevent damage, interference, or disruptions.
3. The operator shall regularly maintain all roads used for access to and within the lease units. A Maintenance and Dust Management Plan may be required. A regular maintenance program may include, but not be limited to: BLM authorized upgrading of existing roads, blading, ditching, culvert, drainage installation, and graveling or capping of the roadbed.
4. Management actions within riparian areas will be designed to maintain or, where possible, improve riparian habitat condition.
5. The operator shall not use Bureau of Reclamation operation and maintenance roads for lease related activities without prior written approval from the Bureau of Reclamation.
6. Noxious weeds which may be introduced due to soil disturbance and reclamation will be treated by methods to be approved by the authorized BLM officer in consultation with Reclamation. These methods may include biological, mechanical, or chemical. Should chemical methods be approved, the lessee must submit a Pesticide Use Proposal to the authorized BLM officer and Reclamation 60 days prior to the planned application date.
7. All drill rig and well test facility lights will be limited to those required to safely conduct the operations, and will be shielded and/or directed in a manner which focuses direct light to the immediate work area.
8. 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 will cease within I 00 meters/330 feet of the discovery, and the BLM and Reclamation would be notified. No surface disturbing activities will be allowed until the BLM authorized officer in consultation with Reclamation issues a Notice to Proceed (NTP) based upon the evaluation, mitigation, as necessary, and the acceptance of a summary description of the fieldwork performed for the discovery situation.
9. Petroleum products such as gasoline, diesel fuel, helicopter fuel, crankcase oil, lubricants, and cleaning solvents used to fuel, lubricate, and clean vehicles and equipment will be containerized in approved containers.
10. Hazardous material shall be properly stored in separate containers to prevent mixing, drainage or accidents. Hazardous materials shall not be drained onto the ground or into streams or drainage areas.
11. Totally enclosed containment shall be provided for all solid construction waste including trash, garbage, petroleum products and related litter will be removed to an authorized sanitary landfill approved for the disposal of these classes of waste.
12. All construction, operation, and maintenance activities shall comply with all applicable federal, state, and local laws and regulations regarding the use of hazardous substances and the protection of air and water quality.
13. In construction areas where recontouring is not required, vegetation will be left in place wherever possible and the original contour will be maintained to avoid excessive root damage and allow for resprouting.
14. Watering facilities (e.g., tanks, developed springs, water lines, wells, etc.) will be repaired or replaced if they are damaged or destroyed by construction activities to its predisturbed condition as required by the authorized BLM officer and Reclamation.
Drilling Operation Drilling Plan- The drilling plan of the Geothermal Drilling Permit will be supplemented as follows: I. If Hydrogen Sulfide is encountered well must be shut-in until measured amounts are determined and these must be reported to the BLM.
2. The operator shall obtain and maintain all necessary State of Nevada and local permits applicable to the drilling of this well.
3. For Air/Aerated drilling operations, the following equipment shall be utilized: banjo box (or equivalent); a staked down blooie line directed to a blooie pit a minimum of 100ft.downwind of the wellhead .
4. Daily drilling and completion progress reports shall be submitted to the Nevada State Office Petroleum Engineer (PE) on a weekly basis, and shall include both daily mud reports and directional survey data.
Casing Pressure Control: 1. The results of the BOPE test shall be reported to the Nevada State Office Petroleum Engineer PE or PET.
2. All tests are required to be recorded on a calibrated test chart/graph and submitted to the Nevada State Office Petroleum Engineer PE or PET.
Reclamation and Abandonment 1. The operator or contractor will contact the authorized BLM officer and Reclamation 48 hours prior to reclamation work.
2. Restoration work may not begin on the well site until the reserve pits are completely dry.
3. Disturbed areas will be recontoured to blend as nearly as possible with the natural topography prior to revegetation with a BLM and Reclamation approved seed mix. This includes removing all berms and refilling all cuts. Compacted portions of the pad will be ripped to a depth of 12 inches unless in solid rock.
4. Site preparation for reclamation may include contour furrowing, terracing, and reduction of steep cut and fill slopes, installation of water bars, etc.
5. All portions of the access roads not needed for other uses as determined by the authorized BLM officer in consultation with Reclamation will be reclaimed.
6. The stockpiled topsoil will be spread evenly over the disturbed area.
7. The operator will be required to construct waterbars and re-open drainages on abandoned access roads and pipeline routes to minimize erosion as required. Water bars will be spaced appropriately dependant upon topography and slope. Pipeline routes shall be water-barred perpendicular to the fall-line of the slope.
8. The area is considered to be satisfactorily reclaimed when all disturbed areas have been recontoured to blend with the natural topography, erosion stabilized and an acceptable vegetative cover has been established.
9. Rehabilitation shall be planned on the sites ofboth producing and abandoned wells. The entire site or portion thereof not required for the continued operation of the well should be restored as nearly as practical to its original condition. Final grading of back-filled and cut slopes will be done to prevent erosion and encourage establishment of vegetation.
10. When sites are abandoned, they will be inventoried for the presence of noxious weeds and treated if noxious weeds are present.
11. Seed and mulch used to reclaim disturbed areas must be certified weed free. The seed mix will be developed by an experienced botanist in conjunction with BLM in coordination with Reclamation. Mulching of the seedbed following seeding will be required under certain conditions (i.e., expected severe erosion), as determined by the authorized BLM officer in consultation with Reclamation.
12. Seed will be broadcast between October 1 and December 31 using a site-specific seed mixture and depth of planting as determined by the authorized BLM officer in consultation with Reclamation. Seed may be applied with a rangeland drill at half the rate of broadcast seeding. All seeding application rates will be in pounds of pure live seed per acre. Seed should be adapted varieties.
Data Completion Notes
Data entry complete 8/13. Duplicate page. Should be consolidated with the other entry for this document. KERMIT: Which is this duplicate with?
DocumentsSerial Register Page:
|Public Health and Safety||
CloseGRI would implement emergency plans for personnel injuries. The purpose of these plans is to provide guidance to field personnel and management in the event of a field related emergency. The plans are intended to be comprehensive in that they describe the nature of various hazards or problems that might be encountered and specify appropriate preventive or anticipatory actions and equipment, as well as specific responses, notifications and follow up procedures that are required in the event of a field emergency.
CloseGRI would implement emergency plans for fire. The purpose of these plans is to provide guidance to field personnel and management in the event of a field related emergency. The plans are intended to be comprehensive in that they describe the nature of various hazards or problems that might be encountered and specify appropriate preventive or anticipatory actions and equipment, as well as specific responses, notifications and follow up procedures that are required in the event of a field emergency.
|Wastes Hazardous or Solid||
Project construction and operation would involve limited hazardous material use and waste generation.
CloseGRI would implement emergency plans for:
•Spill or discharge contingencies (for drilling mud, geothermalfluid, lubricants,fuels, etc.) •Hazardous gas control •Drilling safety and action plans with contingencies for well blowouts
The purpose of these plans is to provide guidance to field personnel and management in the event of a field related emergency. The plans are intended to be comprehensive in that they describe the nature of various hazards or problems that might be encountered and specify appropriate preventive or anticipatory actions and equipment, as well as specific responses, notifications and follow up procedures that are required in the event of a field emergency.
•Containment berms would be constructed around all hazardous material or potentially hazardous material storage. Off‐pad stormwater would be directed away from the well pads.
•An emergency response plan would be implemented that includes contingencies for hazardous materials spills and disposals.
•GRI would adhere to general geothermal lease stipulations for geothermal developers to address the potential impacts involved with transport, use, and disposal of hazardous materials, including the development and implementation of an emergency response plan.
•GRI would comply with all local, state, and federal regulations regarding the use, transport, storage, and disposal of hazardous materials and wastes. Wastes considered hazardous by the State of Nevada would be transported and disposed of according to applicable federal, state, and local regulations.
•GRI would prepare and implement a Hazardous Material Spill Prevention Plan to minimize impacts to the environment from hazardous materials.
•Fueling and routine maintenance of equipment and vehicles would be performed off site or within designated areas with appropriate spill controls to minimize effects.
•Drilling mud and fluid would be directed to reserve pits. At the conclusion of drilling and testing, the liquid portions of the containment basin contents would be evaporated, pumped back down the well, or removed and disposed of off‐site in a facility authorized to receive such wastes. The remaining contents, typically consisting of non‐toxic drilling mud and cuttings, would be tested as required by the Nevada BWPC. If non‐toxic and as authorized by the BWPC, these materials would be spread and dried on the well site, mixed with soil and buried in the on‐site reserve pit in conformance with the applicable requirements of the BWPC,Reclamation, and the BLM. Testing results and location of buried waste would be provided to Reclamation and BLM.
•A blow‐out prevention plan and BOPE would be implemented.•Operation of the geothermal facilities would comply with all local, state, and federal regulations regarding the use, transport, storage, and disposal of hazardous materials and wastes and therefore minimize impacts to the environment.
|Lands and Realty||
Close•Pipeline segments would be constructed under unpaved roads to ensure access along existing roadways.
•A Traffic Management Plan would be prepared, approved by Lyon and/or Churchill Counties, as appropriate, and would be submitted to BLM and Reclamation prior to construction. The plan would then be implemented to minimize construction and operational impacts on other land uses such as mining activities and maintenance of the various irrigation facilities in the project area.
•The location of the well pads in Section 30 have been sited in coordination with Reclamation. GRI may also undertake a gravel exploration program that would be discussed with Reclamation if GRI were to need to move the pads and pipelines. Pads and roads would be sited within areas surveyed for cultural and biological resources.
•GRI would coordinate with NDOT and Union Pacific Railroad to obtain the appropriate approvals to construct the pipeline crossing under Alt 50 and under the railroad as well as the transmission line crossing over the highway and over the railroad, if a power plant is built in Section 29. •GRI would coordinate with Kinder Morgan prior to any ground disturbance in Section 28 to ensure that the gas pipeline is properly marked and avoided.
•GRI would coordinate with LADWP prior to constructing pipeline crossings across the corridor of the high‐voltage DC transmission line in Sections 30 and 32.•GRI would coordinate with Reclamation and TCID for all Newlands Project feature crossings and would have a Reclamation Inspector onsite during Truckee Canal crossing construction. Crossing methods and procedures would be approved by Reclamation
Completion of the proposed geotechnical investigations, and construction of the TGHs, well field, power plant, and associated features would require permanent and temporary disturbance of up to approximately 620 acres of which 574 to 620 acres would be within Intermountain Cold Desert Scrub habitat.
Close•Reclamation of well pads and access roads would occur when it is determined that they would no longer be used for exploration, utilization, or any other purposes. During operations, interim reclamation would be conducted for the well pad areas no longer needed for operation or maintenance. All reclamation would be performed in accordance with the Gold Book (BLM and USFS 2007). •Reclamation would be performed in accordance with lease stipulations. Reclamation would include re‐contouring of disturbed areas to blend in with the surrounding topography and use of appropriate methods to seed with a diverse perennial seed mix. The seed mix used to reclaim disturbed areas would be certified weed free. The seed mix would be developed by an experienced botanist in coordination with the BLM, Reclamation, and/or NDOW and would be based on seed availability and quality. Reseeding would not be undertaken in areas where soil conditions are inappropriate or where the adjacent undisturbed land surface has little or no vegetation, as determined in coordination with a qualified biologist and BLM and Reclamation. Native soil material and organic matter(topsoil) salvaged from the site preparation operations would be reused as a top‐dressing on berms and other areas requiring revegetation to the extent practical.
|Invasive, Nonnative Species||
nstruction and implementation of the proposed project has the potential to increase the spread of invasive, non‐native, and noxious species.
Close•The potential to increase the spread of invasive, non‐native, and noxious species would be minimized through the implementation of the Noxious Weed Abatement Plan, included in Appendix G to this EA for project construction, operation, and decommissioning.
The project area supports limited habitat for many Great Basin wildlife species and has the low diversity of wildlife species typical of desert scrub and greasewood flats.
Close• Willows and roosting habitat would be avoided to the greatest extent feasible.If willows or rock outcrops have to be removed, the vegetation would be inspected by a qualified biologist for bats just prior to removal.If a bat is found, the habitat would not be removed until the bat has left the area. •Reserve pits would be appropriately fenced on three sides during active drilling and on all four sides when not in use to restrict access by people, wildlife and livestock.
Close•Anti‐perch spikes would be installed on the top of cross‐arms of the proposed transmission line alignment, if the option is exercised.
•Transmission structures would be designed with sufficient phase spacing to make it improbable that the wing span of the typical raptor can contact two phases, thus avoiding electrocution.
•If vegetation must be removed during the migratory bird nesting season (May 1 through September 15) surveys for nesting birds would be conducted by a qualified wildlife biologist within three weeks of the vegetation removal for any nesting habitat within 300 feet of the area of disturbance. If active nests are located within the area, GRI would consult with BLM/Reclamation to develop appropriate protection measures for the nests. Such measures may include the establishment of buffers around the nest until the young have fledged or the nest has failed.
•To minimize impacts to migratory birds and other wildlife through habitat alteration well pads and roads would be recontoured and reseeded following completion of construction.Reseeding would not be undertaken in areas where soil conditions are inappropriate or where the adjacent undisturbed land surface has little or no vegetation, as determined in coordination with a qualified biologist.
•Topsoil would be salvaged and reused whenever possible and in a timely manner.•During drilling, if the reserve pit contains oil‐based contaminants (such as from runoff or drilling muds) the pits would be fitted with exclusion devises such as netting or floating balls, in accordance with lease stipulations
even archaeological resources were recommended as eligible for listing in the National Register of Historic Places (NRHP).
Close•GRI would avoid cultural resource sites that are known to be eligible or potentially eligible for inclusion in the National Register of Historic Places through design, construction, and operation of the project, to the greatest extent feasible.
•An approximately 100‐foot buffer zone would be established from the boundary of cultural sites and will be identified by placing flagging around eligible and potentially eligible cultural resource sites to help provide protection to the sites. Project equipment and facilities would not encroach into the established 100‐foot buffer zone to the greatest extent feasible. Fencing would not be required where construction would need to occur within the 100 foot buffer; however, the following measure would be implemented to ensure protection of cultural resources:
– Where the installation of project facilities could impact eligible or potentially eligible cultural sites(s), or must occur within the 100 foot buffer, GRI would retain a qualified archaeologist to serve as a cultural monitor during construction of the facility in order to avoid potential effects to the cultural site(s). The BLM would decide when cultural monitors would be necessary.
•The project facilities would be operated in a manner consistent with the engineered design to prevent problems associated with the run‐off that could affect adjacent cultural sites. This includes the use of BMPs to minimize off‐site erosion and sedimentation.
•GRI would limit vehicle and equipment travel to existing and proposed access roads, well pads, construction areas, and gravel source areas and allowable travel areas would be clearly flagged and staff would be informed (before project commencement) to stay within the identified areas.•Any unplanned discovery of cultural resources, items of cultural patrimony, sacred objects, or funerary items would require that all activity in the vicinity of the find ceases, and the Field Manager, Stillwater Field Office, 5665 Morgan Mill Road, Carson City, 952 Nevada 89701, be notified immediately by phone (775‐885‐6000) with written confirmation to follow. The location of the find would not be publicly disclosed, and any human remains must be secured and preserved in the place until a Notice to Proceed is issued by the authorized officer.
|Native American Concerns||
Close•If human remains are identified during construction of any of the components of the proposed project, work within 300 feet of the discovery would be stopped and the remains would be protected from further exposure or damage. The coroner and Reclamation, NDOW, or SHPO (depending on land ownership) would be contacted.If the remains are determined to be Native American, the agencies would follow the procedures set forth in 43 Code of Federal Regulations (CFR) Part 10, Native American Graves Protection and Repatriation Regulations. Procedures for handling the discovery of human remains would follow Reclamation Manual Directives and Standards LND 07‐01 (Inadvertent Discovery of Human Remains on Reclamation Lands) if remains are located on Reclamation‐managed lands. If remains are found on private land, NRS 383 would be implemented with SHPO as the lead agency.
|Geology and Minerals||
Construction of the proposed project would require the use of fill materialfor well pads, the power plant foundation pad, access roads, and laydown areas, among other uses.
Close•Fill materials would be obtained from the permitted mine located east of Black Butte, in Section 24, T20N,R26E (assigned serial number N‐86320) or purchased from commercial sources.
•GRI would coordinate with NDOT to obtain approval to construct the pipeline through the mine area in Section 32 in order to minimize effects to the existing operations.•During the life of the geothermalfacilities, all disturbed areas not needed for active support of production operations would undergo “interim” reclamation to minimize the environmental impacts of development on otherresources and uses
Construction of the well field, power plant, access roads, and transmission line would disturb a maximum of approximately 620 acres.
Close•Any suitable topsoil would be stockpiled onsite for later use during restoration. Access roads would follow existing routes to the extent possible. In areas where new access roads must be constructed across slopes, erosion control measures would be installed as necessary, in accordance with Gold Book standards (BLM and USFS 2007).
•Erosion control measures, including but not limited to silt fencing, diversion ditches, water bars, temporary mulching and seeding, and application of gravel or rip rap, would be installed where necessary immediately after completion of construction activities to avoid erosion and runoff.
•Additional gravel would be laid down when ground conditions are wet enough to cause rutting or other noticeable surface deformation and severe compaction.
•An NDEP Bureau of Air Pollution Control SAD permit would be obtained and the BMPs identified in the permit would be implemented.
•Vehicle travel on unpaved roads would be limited to 30 mph.
•Any topsoil stockpiles would be located on previously disturbed areas, such as portions of well pads, and would be situated so that wind and water erosion of the piles are minimized and the reclamation potential of the soil is maintained. Other erosion control measures may include surface seeding and moisture conditioning.•All new access roads would comply with the site drainage and runoff management plan to minimize erosion and off‐site sedimentation.
Close•A SAD Air Quality Operating Permit would be obtained for the project and a plan for fugitive dust control would be implemented. The Fugitive Dust Control Plan would include dust suppression processes (e.g., watering access roads and well pads) to minimize localized increases in particulate matter concentrations. The plan would include the following measures.
Fugitive Dust Source Controls: •During grading use water, as necessary, on disturbed areas in construction sites to control visible plumes
•Vehicle speeds would be minimized on exposed soils to 10 to 30 mph to reduce fugitive dust generation from vehicle traffic.
•Use effective measures to prevent run‐off to roadways in construction areas adjacent to paved roadways. Ensure consistency with the project’s SWPPP
•Use wind erosion control techniques (such as windbreaks, water, and/or vegetation) where soils are disturbed in construction, access and maintenance routes, and materials stock pile areas
Mobile and Stationary Source Controls •Best available emissions control technologies would be used where available and practical.
•Plan construction scheduling to minimize vehicle trips
•Dust emissions from venting steam would be reduced by injecting water into the blooie line.
•Diesel generators over 37 kW (50 horse power) would be diesel‐fired units that are certified to meet the US Environmental Protection Agency’s (EPA) TierII Emission Standards and are equipped with an exhaust particulate filter system.
•H2S emissions would be minimized through the use of properly weighted drilling mud which is expected to keep the well from flowing during drilling. Data collection devices would be installed and operated during all phases of drilling and testing. An H2S abatement plan would be developed and implemented during long‐term flow‐testing if it becomes apparent during drilling operations that H2S abatement is necessary to minimize potential nuisance odors. Measures to reduce H2S, if necessary, could include but are not limited to:
– Reducing the number of wells venting simultaneously, as applicable – Implementing additional wellhead abatement measures, such as caustic injection between the flash tank and the portable silencer– All drillrigs would be equipped with alarms to detect unsafe levels of non‐condensable gases (NCGs).
The proposed action would be consistent with the Class III VRM established forthe BLM‐ managed lands in the project area.
Close•The power plant and pipeline would be painted a muted color to blend in with the existing landscape to the greatest extent feasible.
|Areas of Critical Environmental Concern||
|Prime or Unique Farmlands||
|Threatened and Endangered Species||
|Wetlands and Riparian Zones||
|Wild and Scenic Rivers||
|Lands with Wilderness Characteristics||
OHV activities are allowed in Section 6 in the project area. The project could have minorimpacts on OHV use as the well pads and pipeline would occupy a very small fraction (39 acres) of the total amount of OHV use in the area.
|Special Status Species||
Livestock Grazing: The project site is located within the Truckee‐Virginia Allotment, which currently includes one grazing permit with 21,369 acres of public land. Approximately 97 acres of land within the Allotment would be in use for construction of the well pads, pipeline, and access roads, which is less than 1 percent of the total grazing allotment.
CloseConstruction would likely occur during the dry season, when cattle grazing is not permitted (April 16th through October 31st).
Cattle would be able to cross access roads.
The project would not compromise livestock access to available water sources if the area were to be used for grazing in the future.
Vehicles would travel at low speeds to minimize potential for injury to cattle, were access to occur during the permitted grazing season and cattle were in the area.
Decommissioning and restoration would return the 97 acres of previously disturbed areas withinthe grazing allotment to land that could potentially be utilized again for livestock grazing.
Close•Reserve pits would be constructed to prevent seepage of testing fluids into the underlying groundwater.
•Containment berms would be constructed around all hazardous material or potentially hazardous material storage areas. Off‐pad stormwater is directed away from the well pads.
•BOPE would be maintained at the wellhead during drilling or work over operations to allow well shutdown if an uncontrolled flow of fluid or gas occurs.
•A cement and casing program for construction of any wells would be implemented to prevent water quality effects on groundwater during or after well installation. Borehole geophysics analyses (cement bond logs) would be conducted to document that well‐casing cementing activities provide an effective seal, isolating the geothermal aquifer from shallow alluvial aquifers.
•GRI would obtain necessary permits for work in waters and/or groundwater discharge permits and would provide a Notice of Intent to NDEP prior to well pad construction.
•A hydrologic evaluation program will be implemented, which would be site specific and its intensity would be commensurate with the level of development drilling.
•When permanent new access roads must cross ephemeral washes, rolling dips would be installed. The rolling dips would be designed to accommodate flows from at least a 25‐year storm event. Culverts may be used wherever rolling dips are not feasible
•Site‐specific designs for use of jack and bore or horizontal directional drilling methods (e.g., entry and exit sites, subsurface profiles) would be developed based on geotechnical surveys of local soils conditions at the proposed canal crossing. These designs would be prepared to identify how entry and exit points would be sited, depths of drilling, and how inadvertent releases of drilling fluids would be contained. Jack and bore or horizontal directional drilling progress would be continuously monitored by trained personnel.
•If trenching is used to cross the laterals, the trenching would be performed when there is no water is in the laterals. BMPs would be implemented to minimize any potential for runoff or contamination of the laterals and all debris would be cleaned from the lateral after construction, before water flows in the laterals. The area of trenching would be stabilized, as appropriate, to prevent sedimentation once water begins to flow within the lateral.•BMPs to prevent release of fuels or other construction materials would be implemented, including GRI’s Stormwater Pollution Prevention Plan (SWPPP) and Spill Prevention, Control, and Countermeasure (SPCC) Plan, which would be prepared and submitted to the BLM and Reclamation for approval prior to construction.