DOE-EA-1733

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NEPA Document Collection for: DOE-EA-1733
EA at Geysers Geothermal Area for Geothermal/Well Field

Calpine Enhanced Geothermal Systems Project EA at Geysers Geothermal Area for Geothermal/Well Field

General NEPA Document Info
Energy Sector Geothermal energy

Environmental
Analysis Type

EA

Applicant

Calpine
Consultant RMT Inc

Geothermal Area

Geysers Geothermal Area

Project Location

California

Project Phase

Geothermal/Well Field

Techniques

Time Frame (days)
NEPA Process Time 192
Participating Agencies

Lead Agency

United States Department of Energy

Funding Agency

United States Department of Energy

Managing District Office

DOE Golden Field Office

Managing Field Office

DOE Golden Field Office

Funding Agencies

none provided

Surface Manager

Mineral Manager

State of California,
Selected Dates
Application
Document Type
POU
Scoping Initiated Date 2009/12/11
Decision Document Date 6/21/2010
Relevant Numbers
Lead Agency
Doc Number
DOE-EA-1733

Proposed Action

The US Department of Energy (DOE) is preparing an Environmental Assessment (EA) to address the potential environmental effects of the Calpine-Geysers Power Company (Calpine)’s proposed Enhanced Geothermal System (EGS) demonstration project. The proposed project would be located within the Northwest Geysers, Sonoma County, California within the Geysers-Clearlake Known Geothermal Resource Area (KGRA).

The proposed EGS project includes the injection of water, ranging from 50 to 80 degrees Fahrenheit, into wells to enhance the permeability of an existing high temperature hydrothermal reservoir that would be harnessed to produce electrical energy. The purpose of the project is to demonstrate the ability to stimulate high temperature rocks by monitoring their early response to carefully designed injection tests. The project would be a collaborative effort between scientists and engineers of Calpine Corporation, Lawrence Berkeley National Laboratory (LBNL), and the DOE.

The EGS project involves injection of water into existing two wells with modifications. Work would occur in three phases (pre-stimulation, stimulation, and long term injection).


Data Completion Notes

Data entry complete 8/13; KERMIT: Need to add Public Health and Safety as a resource

Documents

 
 
 

 
 
 
 
EA/EIS Report: 
FONSI: 
 
 
 
 

Resource Analysis

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

 

proposed imposed
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.

 

  imposed
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.

Expansive soils are common throughout The Geysers; however, the proposed project does not involve work in any previously undisturbed areas or previously undisturbed soils.

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

While non-damaging microseismic activity may increase, the chances of inducing a much larger event are negligible. I

proposed  
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.

Removal of vegetation for well pad preparation and construction of the SRGRP pipeline may displace a few common small mammals and reptiles; however, the surrounding habitat is plentiful and adequate to support these animals such that they would not be adversely impacted.

   
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.

No rare or sensitive plant species are expected to occur at the project site. Special status avian species known to occur in the project area include Sharp-shinned hawk, Common yellowthroat, and Yellow warbler

  imposed
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.

Removal of a small amount of vegetation for construction of the pipeline and re-grading of the well pad would not be considered an adverse effect to the general vegetative communities in the area.

   
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.

The removal of invasive species during construction would be beneficial to the area

   
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.

No work would occur within wetland or riparian habitat

   
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.

The project area is over 4.5 miles away from the nearest 100-year floodplain as defined by the Federal Emergency Management Agency (FEMA) (FEMA 1996). Adverse impacts are not expected and Floodplains is dismissed as an impact category for analysis.

   
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.

Prehistoric sites in the general project region show affinities to prehistoric cultures that lived to the north in Mendocino County, the east in Lake County, and to the south in the San Francisco Bay area. Numerous prehistoric sites have been recorded in the general geographic area in which the project is located.

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

 

proposed imposed
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 Geysers are located within the Mayacmas Mountains, which are part of the Inner Coast Ranges of the California Coast Range, in Sonoma and Lake Counties. The predominant visual characteristic of the project region is rugged mountains with elevation ranges up to approximately 5,000 feet (Sonoma County 2008b). The rugged natural landscape is regularly disrupted in the region by power plants, steam collection lines, roads, cut and fill slopes, and other features of the extensive geothermal development

  imposed
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.

Construction activities include preparation of the well pad and construction of the SRGRP pipeline spur. Some hazardous materials from project-related activities (i.e., fuels, oils) would be present on-site during construction activities.

  imposed
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.

Safety practices and training are required for all workers at the site.

  imposed
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.

The project would not conflict with any of the permitted land uses or require a change in land use within the project area.

   
Access and Transportation
"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 not result in an increase in vehicular traffic or require a change in traffic circulation.

   
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 project would not affect agricultural lands or prime or unique farmland soils as defined by the Natural Resource Conservation Service (NRCS). The project would not occur on or near any farmlands.

   
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.

here are no national or state Wild and Scenic Rivers within the project area; therefore, impacts are not expected and Wild and Scenic Rivers is dismissed as an impact category for analysis.

   
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.

There are no residents near the project area. The closest residents are located 2 miles from the well pad site.

   
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.

Construction and operation of the proposed project would not result in any major adverse socioeconomic changes.

   
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 is no population in the vicinity of the proposed project. The project requires limited construction and drilling activities that are commonplace in the project region.

   
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 not violate any water quality standards or WDRs. Well bore modifications would not have effects on surface water hydrology. No adverse effects would occur from temporary use of groundwater for drilling water supply.

  imposed