Geothermal/Access and Transportation
Geothermal Access and Transportation
Access and Transportation
Present, Potentially Affected
- Antelope Valley Neset (AVS - Neset 345 kV Transmission Line Project)
- Barren Ridge Renewable Transmission (Barren Ridge Renewable Transmission Project Environmental Impact Statement)
- Big Eddy-Knight (Big Eddy-Knight Transmission Project Environmental Impact Statement)
- Boardman to Hemingway (Environmental Impact Statement and Land Use Plan Amendments for the Boardman to Hemingway Transmission Line Project)
- CA-96062042 (Fourmile Hill Geothermal Development Project Environmental Impact Statement (EIS) / Environmental Impact Report (EIR) for Geothermal/Power Plant, Geothermal/Well Field, Geothermal/Transmission)
- Cameron to Milford-138kV Transmission Line (Cameron to Milford - 138kV Transmission Line Project)
- Central Ferry Lower Monumental (Central Ferry-Lower Monumental 500-kilovolt Transmission Line Project)
- DOI-BLM-CA-ES-2007-017-3200 (Final Environmental Impact Statement for the Truckhaven Geothermal Leasing Area)
- DOI-BLM-CA-ES-2013-002+1793-EIS (Casa Diablo IV Geothermal Development Project EIS at Long Valley Caldera Geothermal Area for Geothermal/Power Plant)
- DOI-BLM-ID-220-2009-EA-3709 (Raft River Geothermal Drilling Project EA for Geothermal/Exploration)
- DOI-BLM-NV-CC-ES-11-10-1793 (Salt Wells Geothermal Energy Projects EIS for Geothermal/Power Plant Development Drilling)
- DOI-BLM-NV-W010–2012–0005–EA (EA for Development Drilling at New York Canyon Geothermal Utilization and Interconnect Project for Geothermal/Power Plant, Geothermal/Transmission, Geothermal/Well Field)
- Devers Palo Verde No 2 (EIS/EIR Devers-Palo Verde No. 2 500kV Transmission Line Project)
- EA-NV-030-07-006 (EA for Exploration Drilling at Carson Lake Corral Geothermal Area for Geothermal/Well Field)
- Eldorado Ivanpah Transmission Project (EIS/EIR for the Eldorado-Ivanapah Transmission Project)
- Energy Gateway South (Environmental Impact Statement and Land Use Plan Amendments for the Energy Gateway South Transmission Project)
- Gateway West Transmission Line (Environmental Impact Statement for the Gateway West Transmission Line Project)
- Grand Coulee Transmission Line (Grand Coulee's Third Powerplant 500-kilovolt Transmission Line Replacement Project, Preliminary Environmental Assessment)
- McNary-John Day (McNary-John Day Transmission Line Project Environmental Impact Statement)
- Mona to Oquirrh Transmission (Mona to Oquirrh Transmission Corridor Project and Proposed Pony Express Resource Management Plan Amendment)
- NV-EA-030-07-05 (EA for Thermal Gradient Holes at Salt Wells for Geothermal/Exploration)
- North Steens 230kV Transmission (North Steens 230-kV Transmission Project EIS)
- One Nevada (Final Environmental Impact Statement for the One Nevada Transmission Line Project (ON Line Project))
- Southline Transmission Line (Environmental Impact Statement for the Southline Transmission Line Project)
- Sun Valley to Morgan Transmission Line (Environmental Impact Statement for the Sun Valley to Morgan Transmission Line Project)
- Sunzia Southwest (SunZia Southwest Transmission Project)
- Tehachapi Renewable Transmission (Environmental Impact Statement for the Tehachapi Renewable Transmission Project)
- Transwest Express (Transwest Express Transmission Project Environmental Impact Statement)
- Vantage Pomona Heights (Environmental Impact Statement for the Vanage to Pomona Heights 230kV Transmission Line Project)
- West-wide Energy Corridors (West-wide Energy Corridor Programmatic Environmental Impact Statement)
To access the geothermal site and to transport construction materials, the developer must comply with current federal, state, county and city road regulations. The preference is for existing roads to become access roads to eliminate or reduce the number of new roads that need to be constructed for the plant’s operation. All roads must be a part of the plant’s initial design to prevent conflicts with visual resource management teams. Roads must be monitored and maintained under a management plan developed by the developer.
Access and Transportation Impacts & Mitigation
During the construction phase of the plant, surrounding areas will experience an increase of industrial traffic on public roads. Nearby residents or businesses could notice an increase in noise as well as a potential increase in accidents involving industrial and passenger vehicles.
- Schedule industrial traffic to arrive and depart during non-peak local traffic times;
- To decrease accidents, post signs before the site to warn of oncoming trucks, and signs after the site thanking patrons for their compliance;
- Know what kind of road alterations need to take place to withstand overweight and oversized industrial vehicles (i.e. widening roads and reinforcing bridges); and
- Create a timeline to predict how long traffic patterns will be effected.
To mitigate noise impacts effecting patrons:
- Notify nearby residents or businesses of the daytime hours the noise will be in effect.
- Coordinate schedules with nearby businesses to diminish the disturbance during their operating hours.
Factors Affecting Access and Transportation
To follow current regulations, several factors need to be considered in the construction phase. The factors listed below will guide the developer in long-term access throughout the plant’s site.
Erosion and Water Diversion
Erosion is the gradual degradation of a natural feature over time due to wind or water. Human impacts can speed up this natural process if mitigation or land ethics are not observed. For example, if a road needs to be constructed into a hillside, the slopes cannot be steeper than 3:1 and cannot be filled more than 2:1. This mitigation measure decreases the likelihood of mudslides, avalanches, and flooding.
Runoff water needs to be diverted into a sediment-trapping mechanism to prevent flow into intermittent or perennial waterways. Mitigation structures include: water bars, berms, drainage ditches, and sediment ponds. These structures allow the water to flow at a slower constant rate to places that can retain a large volume of water. This is especially important in the event of a flood or heavy precipitation.
Sand, silt and clay are the 3 common types of soil. Most often, the soil type is a hybrid of 2 or 3 categories. Sand has the largest particles, while clay has the smallest. These 3 categories are consequently broken up into 12 different soil types that are classified by their physical, chemical or biological properties. Soil types are measured by how much water they can hold, therefore, knowing the soil type of the site is important because it can reveal how well the roads will be supported.