DOE-EA-1116

From Open Energy Information


NEPA Document Collection for: DOE-EA-1116
EA at Steamboat Springs Geothermal Area for Geothermal/Power Plant, Geothermal/Well Field, Geothermal/Transmission,

Kalina Geothermal Demonstration Project EA for Geothermal/Power Plant, Geothermal/Well Field, Geothermal/Transmission

Proposed Action

Exergy, Inc (Exergy), proposes to construct and operate a 6-megawatt (MW), advanced binary, geothermal power plant. The development of this power plant includes geothermal production and injection wells, as well as ancillary facilities [such as on-site access road(s) and electric transmission lines interconnected to existing geothermal power plants]. The proposed site to be developed is approximately 16 kilometers (km) [(10 miles (mi)] southeast of Reno in Washoe County, Nevada. The proposed geothermal power plant and associated components, using the KCS 11 technology, are known as the Kalina Geothermal Demonstration Project (KGDP).

The proposed KGDP would be located on a private leasehold known as the Harvey (formerly "Giusti") parcel within the jurisdiction of Washoe County. The Harvey parcel is approximately 24 hectares (ha) (60 acres) in Section 29 of Township 18 North, Range 20 East.


Data Completion Notes

5/21/2014: added Decision Date based on signature date on final page of the EA. For the convenience of future reviewers, the latest date I can find on the 1998 application attachments is 5/21/1998. Many of the application documents for the 1993 EA application appear to be dated Nov/Dec 1993. MB

Data entry complete 8/15. KERMIT: Need to add Public Health and Safety as a Resource









 

<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
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.

As demonstrated by the statistical data provided in Section 3.1.1, the Reno/Sparks MSA is not predominantly comprised of minority or disadvantaged groups.

   
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 estimated peak work force during construction is estimated to be 75 to 100 workers. Preference would be given to local companies. Therefore, the project is not expected to generate a major influx of new employees.

   
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.

Implementation of the proposed action would be consistent with the existing Washoe County land use plan which designates the use of the project site for geothermal development.

   
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.

Approximately 3.4 ha (8.4 acres) would be cleared and graded during site preparation. These impacts are not expected to effect the on-site geology (i.e., change geologic substructures).

   
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.

Approximately 3.4 ha (8.4 acres) would be cleared and graded during site preparation.

CloseWind erosion of soils would be decreased by treating the soil during construction activities.
 
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.

Permanent impacts to vegetation in the study area would consist mainly of loss of upland open forest and, to a lesser extent, sagebrush from construction of the proposed action.

 
CloseThe following mitigation measures would be employed to reduce or avoid potential impacts to the Steamboat Buckwheat.
  • Stockpiling soils, storing equipment, and parking construction vehicles would be maintained in a designated staging area which already lack significant stands of vegetation.
  • Prior to construction activities, on-site Steamboat Buckwheat habitat would be fenced by a qualified biologist, and construction workers would be instructed to avoid the plants.
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.

Because wildlife occurring in the existing habitats are relatively low in abundance and diversity, construction activities would be expected to result in removing or displacing low numbers of common and characteristic animals and habitat features.

   
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.

Potential impacts to Steamboat buckwheat and Altered andesite buckwheat due to construction of activities associated with this project are described in a biological assessment.

 
Close4.1.5.4 Mitigation Measures- The following mitigation measures would be employed to reduce or avoid potential impacts to the Steamboat Buckwheat.

• Stockpiling soils, storing equipment, and parking construction vehicles would be maintained in a designated staging area which already lack significant stands of vegetation.

• Prior to construction activities, on-site Steamboat Buckwheat habitat would be fenced by a qualified biologist, and construction workers would be instructed to avoid the plants.
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.

Although the Sinter Quarry occupies roughly two-thirds of the project area, the distinct loci being recommended for eligibility on the NRHP consist of debris that is scattered widely throughout the individual sites.

 
Close4.1.6.1 Mitigation Measures- To ensure there are no adverse impacts on the Steamboat Ditch and the culturally significant parts of the Sinter Quarry, the following mitigation measures are proposed:
  • Monitoring by an archaeologist during all ground disturbance activities.
  • Placing facilities along already existing roads and disturbed areas
  • Instructing work crews on Nevada and federal Antiquities Laws
Public Health and Safety
"NEPA_Resource_Analysis" is not in the list of possible values (Not Present, Present, Not Affected, Present, Potentially Affected, Not Indicated) for this property.

Potential impacts to public health and safety associated with the proposed action would be limited to upset conditions resulting from accidental releases from on-site ammonia storage tanks and transferring geothermal brine at the power plant.

 
CloseDames & Moore completed a detailed risk assessment to evaluate potential impacts from an accidental ammonia release (Dames & Moore, 1994). The results from this analysis are presented in the following sections. An evaluation of potential impacts from transferring geothermal brine to and from the power plant is also provided.
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.

Short-term exposure of the disturbance area may effect surface runoff. Since construction would only last a short term (approximately 14 months), significant impacts to absorption rates, drainage patterns, surface runoff, or water quality is not expected.