National Park Service Comments on the Palen Solar Power Towers
November 18, 2013 - As Joshua Tree National Park lies within view of these proposed 750-foot solar thermal towers, the National Park Service gave comments on the project's impacts: >>download the 183 KB pdf.
California Energy Commission Evidentiary Hearing
November 4, 2013 - Basin & Range Watch was an intervenor at the California Energy Commission (CEC) evidentiary hearing in Palm Desert on October 28 and 29, 2013. This is the last phase in the licensing review by the state agency as it carries out environmental review under the California Environmental Quality Act (CEQA) for a thermal power plant. The Bureau of Land Management (BLM) is undergoing a parallel review under the National Environmental Policy Act since the project is on federal land.
Other intervenors include Center for Biological Diversity (CBD), Colorado River Indian Tribes, and Californians for Renewable Energy.
The now defunct company Solar Millennium had originally proposed this project, using a solar trough technology to heat steam in a power block. BrightSource Energy later bought the project, and along with Abengoa, is currently seeking a license to build a solar power tower facility. Thus the current hearing addresses the changes to a project already approved by the CEC (but not yet by BLM). The project will cost close to $2 billion to construct.
The Quechan representatives and Colorado River Indian Tribes were outraged because this power plant has similar properties to the Genesis Solar Energy Project where a village site and cremation site were found. The tribes wanted no project and made eloquent speeches for hours about how important the area is to them and their history and traditions.
On alternatives, we had proposed Westlands Water District contaminated brownfields as a site to analyze to place this massive solar project, instead of living desert ecosystem. But the CEC's response was that it was "too far away" for the Energy Commission to consider. We asked them if there was a specific mileage distance that was in CEC policy that limited the distance considered for an alternative? Answer: No. Distributed generation such as rooftop solar was not discussed.
The visual landscape will be changed drastically in the area, with two 750-foot tall glowing power towers and hundreds of thousands of mirrors reflecting sunlight over five square miles. Everyone admitted these represent significant unmitigable impacts, so an override will probably be doled out (the CEC has given itself the power to override significant impacts in CEQA if deemed in the public interest). CEC had not addressed the impact to hikers, campers, and recreationists in the nearby wilderness areas and Joshua Tree National Park. CEC had a condition that there will be a 1-800 number for people to call in case they see an errant flash glare from a mirror or blinding light from the glowing receiver. Drivers on I-10 can call this number. We also brought up curtailment -- turn the heliostats up so they don't glint as much to people on the ground during certain times. Riverside County was on the phone and interjected that they wanted to make sure an expert on heliostat operation was on the phone.
^The solar power tower under testing at Ivanpah Valley, CA.
CEC said they admit birds will be killed by the solar flux at the power towers. Mitigation has yet to be determined. Adaptive Management was said to be the main way to deal with bird kills, as the problem will be deferred and studied. No one seemed to know what to do about this.
Center for Biological Diversity expert witness herpetologist Al Muth showed a fantastic photo of a 6-foot-high chainlink fence near Palm Springs covered to the top with a mound of sand. The proposed solar array will be partially in the path of a sand transport corridor at Palen, with chainlink fences around the heliostat field. They could get buried in a similar fashion. The topic of downwind sand habitat was highly contentious: how the fences will or will not stop the sand flow and degrade Mojave fringe-toed lizard habitat. Dr. Muth gave testimony that the sand on the downwind side of the project will deflate and stabilize eventually, and lose quality for sand-dwelling species as has happened in the Coachella Valley.
^Photo taken by Dr. Al Muth of a 6-foot high chainlink fence in the Palm Springs area covered by sand. BrightSource and Abengoa are proposing to surround their solar project by similar chainlink fences, partly in a sand transport corridor in Chuckwalla Valley.
Ileene Anderson of CBD argued well to have a system in place to pay for a kit fox monitoring plan to make sure another outbreak of canine distemper will not happen, as occurred at Genesis. She called a California Department of Fish and Wildlife representative up to testify how they will regulate this (no definitive answer).
CBD expert witness Pat Flanagan, who had worked as a biologist at the former Solar 1 power tower once in operation in Daggett, CA, gave testimony to the remarkable number of avian species in the area, brought up the issue of "land facets" (connectivity issues), and how she did not think the mitigation proposals so far would work. An adaptive management strategy was proposed by BrightSource and Abengoa of using such devices as plastic owls, trained dogs, and canons to dissuade birds from flying near the power tower.
Also see the article in the Desert Sun:
Bird Mitigation Proposed for Palen Solar Power Towers
October 25, 2013 - BrightSource Energy intends to scare the birds away from the solar flux around the operating power towers for the Palen Solar Electric Generating System in several possible ways. Some measures proposed include driving ATVs around, firing shot guns and cannons, dogs will be trained to scare birds away, as well as possibly trained falcons.
Summary of Potential Avian Adoptive Management Measures by Category:
--Facility habitat and prey control.
--Perch and nest-proofing.
--Netting or other enclosures.
--Dog, raptor other animal related deterrence. This could include trained falcons to chase birds away from the project.
--Actively managed radiocontrolled aircraft, water cannons, shotgun blasts, ATVs.
--Radar and long-range focused, bio-acoustics or visual deterrence. These could include strobe, revolving and amber barricade lights; reflective Mylar tape mounted as streamers or spans; stationary or mechanical pop-up scarecrows or effigies; black, white or other colored plastic flags; reflective Mylar balloons, including balloons marked with predator “eyespots” or that include suspended kites shaped like a hawk or an eagle; laser light emitted including hand-held units, kites, and kite-hawks and other mobile predator models; stationary predator models
BLM Meeting in Blythe
September 21, 2013 - Blythe, CA - The Bureau of Land Management (BLM) held a public meeting to hear comments on their environmental review of the Palen solar project on public land in Chuckwalla Valley, Riverside County CA. Members of Basin & Range Watch attended. BLM expects to issue their Record of Decision on the project around January 17, 2014.
BrightSource Energy and the Spanish company Abengoa are proposing to develop the project, and BrightSource gave a presentation. Abengoa would construct the project while BrightSource would be the technology provider. We note that these large-scale solar thermal power plants have proven difficult to build, and this is not the first time Spanish expertise has been brought in to provide engineering and construction services. Solar Reserve brought in Spanish experts to help overcome problems encountered during the construction of the Crescent Dunes power tower near Tonopah, NV.
The Palen solar project has power purchase agreements from Pacific Gas & Electric to provide power to the grid. BrightSource is hoping to push for a 2016 completion date in order to qualify for the federal Investment Tax Credit for solar. The project would cost $2 billion plus to build.
The Ivanpah solar project was described as "generation 1" power tower technology, while the Palen power towers will be "generation 2."
Joshua Tree National Park would be 8 miles away from the project, so views from park areas will be a concern.
Total water usage according to BrightSource's estimates would be 7,160 acre-feet, and of that 1,139 af would be used for construction. Operational use would be 231 acre-feet/year, mostly for washing the mirrors and regeneration in the steam process. Two evaporation ponds would be 4 acres each.
A half-mile long 8-inch natural gas pipeline would go to the project boilers from a mainline owned by Southern California Edison. Natural gas would be burned in daily start-up of the plant and during cloudy days.
A difference between the Palen project and Ivanpah facility are in how the heliostats are controlled as they move during the day tracking the sun to bounce sunlight onto the tower. At Ivanpah the heliostat mirrors are all connected by wires along the ground to feed them power to move and direct their position; at Palen the heliostats will be wirelessly controlled and powered by solar power.
Basin & Range Watch asked about the recent bird mortality at Ivanpah, including a peregrine falcon that was apparently blinded by the intense solar flux during power tower testing, as well as other bird deaths at solar plants. How will these be prevented or mitigated? BLM representatives said there was a private meeting being organized for next week with BLM, US Fish and Wildlife Service, and bird experts to try to address those issues.
Local and Native American Concerns
Representatives of the local group La Cuna de Aztlan Sacred Sites Protection Circle -- Alfredo Figueroa and Jesse Figueroa -- voiced their concerns about Native American sacred sites and culture in the region. Mr. Figueroa explained how the Palen project would be right in the middle of many sacred sites, in a wash from Corn Springs.
^Aztec Sickness (Save the Geoglyphs), singing by Jesse Alfredo, filmed by Robert Lundahl.
Quechan Historical Preservation Officer Arlene Kingery said the tribe opposed the Palen project, primarily on the grounds that the viewshed would be disrupted. The Quechan may request to try to locate burial sites on the project by using forensic dogs.
BLM said they will not officially take spoken comments on the record anymore, only written comments. This is controversial with people who drove hundreds of miles sometimes to reach the meeting.
^The project site outlined in red in Chuckwalla Valley.
^Yellow shows where the project will be visible from, including Joshua Tree National Park.
^Document explaining the meaning of sacred sites near Blythe, CA, by Alfredo Figueroa.
^The Big Maria Mountains and Palo Verde Mesa, showing the image of Tlaltecuhtli in the central domed mountain peak. There are dozens if not hundreds of such images that are read in the rocks like a book of history according to Alfredo Figueroa.
California Energy Commission Releases Final Staff Assessment
September 10, 2013 - The Palen Solar Electric Generating System Final Staff Assessment - Part A, at 1639 pages, was released as the environmental review process speeds ahead under the state agency.
Subjects covered include Alternatives, Biological Resources, Efficiency, Executive Summary, Facility Design, Compliance, Geology/Paleontology, Hazardous Materials, Introduction, Land Use, Noise and Vibration, Project Description, Public Health, Reliability, Socioeconomics, Traffic and Transportation, Transmission Line Safety and Nuisance, Transmission System Engineering, Visual Resources, Worker Safety and Fire Protection, Waste Management, and Soil and Water.
Go to the CEC Documents page and download the PDF file of the Final Staff Assessment: https://efiling.energy.ca.gov/Lists/DocketLog.aspx?docketnumber=09-AFC-07C
See also the excellent post on Mojave Desert Blog: http://www.mojavedesertblog.com/2013/09/brightsource-palen-solar-project-moving.html
Sand Transport Corridor an Issue Again
^Aerial view of a digital visualization of the proposed Palen Solar Electric Generating System with two power towers, looking southwest across the sand dunes of Chuckwalla Valley, across the I-10 highway, and the Salton Sea and Imperial Valley visible in the distance.
July 26, 2013 - During a two-day workshop held in Sacramento at the California Energy Commission (CEC) offices, BrightSource Energy discussed with various Energy Commission staff, biologists, agency reps, and intervenors how to crunch the numbers of mitigating impacts to resources at the Palen solar power tower project in Riverside County, CA.
85,000 heliostats would be built in each unit. One problem is that this particular design will block part of the sand transport corridor that moves west to east on blowing winds down the Chuckwalla Valley.
According to a study commissioned by the CEC and made available in July 2013, Geomorphic Assessment of Sand Transport for the Modified Project, by Nicholas Lancaster, Thomas Bullard and Jack Gillies the Desert Research Institute in Reno NV, "Modeling of the effects of the Modified Project on sand transport in the Palen Valley indicates that the Project has an increased level of predicted effects on sand transport, compared to the Applicant’s Reconfigured Alternatives 2 and 3. This is because the project footprint extends further east into the sand transport corridor.... The Modified
Project heliostat array is predicted to have a very significant effect on sand transport such that sand transport will be reduced by 93% at 1738 feet into the array."
Numerous Mojave fringe-toed lizards (Uma scoparia) were found in this sand transport corridor habitat, as these lizards prefer looser sand areas. Much habitat would therefore be destroyed by a project here, and indirect impacts would be large due to a modification of the moving sand habitat. A mitigation measure of land acquisition was proposed but the applicant will have difficulty finding enough private land to purchase, and instead a proposal to place money in a fund whereby Bureau of Land Management and California Department of Fish and Wildlife would try to restore habitat areas from off-roading and carry out weed removal.
The applicant proposed moving sand inside the fence of the project to re-supply the sand transport corridor. Other mitigation measures proposed were adaptive management and monitoring of the sand habitat being impacted. The applicant proposed surveying for fringe-toed lizards annually in the degraded habitat downwind of the project in a monitoring program. Dr. Lancaster recommended using satellite images to monitor changes in the landscape over time.
Also mentioned were ideas to build upwind "sand-catcher" fences ahead of the project to collect the sand before it blows into the project. This is a terrible idea, we believe, as yet more habitat would be impacted and modified.
CEC pointed out that a number of sand-dwelling plants would also impacted by reduction of sand transport.
Instead of avoiding the destruction of fringe-toed lizard habitat and indirect impacts, the discussion centered on future monitoring of the lizard habitat. The applicant offered 89 acres of mitigation land to make up for the impacts.
^Mojave fringe-toed lizard sightings mapped out against a model of how the solar project would block the sand transport corridor in the valley, shown as a brown "shadow" of the project and downwind blockage of sand flow.
Furthermore, Mojave fringe-toed lizards (MFTL) will be killed by road work, blading of desert, and truck transport on new roads in the desert, as has already happened at a transmission line project nearby. Surveys along along the Colorado River Substation access road associated with the Devers to Palo Verde 2 (DPV2) transmission line project in 2012 and 2013 showed a mortality rate of one fringe-toed lizard killed per day in the project construction area. According to a memo by HELIX Environmental Planning Inc., monitoring commenced in October 2012 at a rate of 6 days per week and ended in November 2012 when fringe-toed lizards were no longer active. Monitoring re-commenced in April 2013 at a rate of 5 days per week and ended in June 2013 when construction was
completed in this portion of the project. HELIX relocated a total of 304 MFTL (40 in fall 2012 and 264 in spring/summer 2013) and recorded 90 MFTL mortalities (9 in fall 2012 and 81 in spring/summer 2013) during the two seasons of monitoring. In fall 2012, a total of 29 days of monitoring were conducted, which resulted in an average of 1.4 MFTL relocated/day and 0.3 MFTL mortalities/day. In spring 2013, a total of 61 days of monitoring were conducted, which resulted in an average of 4.3 MFTL relocated/day and 1.3 MFTL mortalities/day.
^ Details of a large map by HLEIX Environmental Planning, showing Mojave fringe-toed lizard surveys and mortality along the Devers-Palo Verde 2 500 kilovolt transmission line construction project.
Mortality of fringe-toed lizards is cumulatively building higher and higher in the Chuckwalla Valley due to this and other transmission line projects, associated substations, the Genesis solar project, Desert Sunlight and Desert Harvest solar projects, and the Palen solar project proposal.
A few desert tortoise (Gopherus agassizii) burrows, a few live individuals, a burrowing owl (Athene cunicularia), and tracks and sign of burro deer (Odocoileus hemionus eremicus, a desert-dwelling race of mule deer) were found during spring surveys of the proposed gen-tie line and natural gas pipeline that would serve the solar project. Kit fox burrow complexes were mapped.
California Energy Commission Releases the Latest Environmental Review Document
June 30, 1013 - The California Energy Commission released its Preliminary Staff Assessment on an agressive schedule to meet deadlines sought by BrightSource Energy for its design change since taking over this project from bankrupt Solar Millennium. The PSA reviews the project change from a solar thermal trough design to power towers. Updated surveys for natural resources present on the site are also included.
The California Energy Commission has generously given the public a whopping 30 days to comment on the 1,367 page Preliminary Staff Assessment reviewing the proposed BrightSource Energy Palen Solar Power Project, which would construct two solar power towers on about 5 square miles of federal land. The project will impact birds, rare desert sand dune habitat, desert tortoise, archeology sites and be visible from the wilderness of Joshua Tree National Park. The expedited schedule will help BrightSourc Energye meet financing deadlines at the expense of valuable public resources. If you would like to help us, write the California Energy Commission at email@example.com and request that “the comment period for the Preliminary Staff Assessment be extended an additional 60 days to provide adequate time to review the 1,367 page document.”
This notice is to inform you that the California Energy Commission (Energy Commission) staff has prepared a Preliminary Staff Assessment (PSA). The PSA contains the Energy Commission staff's independent evaluation of the proposed Palen Solar Electric Generating System (PSEGS) amendment. The PSA is now available for public review and comment. Under its certified regulatory program, Energy Commission staff has completed an independent assessment of the PSEGS Petition to Amendment (09-AFC-7C). The Energy Commission staff's preliminary conclusions are summarized in this notice. The Energy Commission encourages public participation in the review of the PSEGS Amendment (09-AFC-7C). The public comment period for this PSA begins now and will
continue for 30-days until 5:00pm on July 29, 2013.
See the CEC website under Compliance Documents: http://www.energy.ca.gov/sitingcases/palen/compliance/index.html
Palen Solar Project Status Report
June 11, 2013 - Thanks to Chris Clarke at KCET ReWire for this summary of the latest meeting with the California Energy Commission on BrightSource Energy's Palen Solar Electric Generating System project >>here.
BrightSource, Abengoa Partner on Palen Project
March 20, 2013 - On July 11, 2012, the California Energy Commission approved a petition from Palen Solar I, LLC to transfer the ownership of the Palen Solar Project, from Palen Solar I, LLC to BrightSource Energy, Inc.
This week BrightSource announced it will be partnering with Abengoa (a Spanish company) to construct the 500-MW Palen Solar Electric Generating System.
The two solar thermal companies will work together to permit and finance the project, and Abengoa, as the engineering, procurement and construction contractor, will build it. BrightSource wants to have Palen in commercial operation by June of 2016 in order to qualify for federal solar tax credits that expire at the end of 2016. BrightSource acquired the project last year during the bankruptcy proceeding of former owner Solar Millennium.
The project will consist of two solar power towers with superheated steam to turn steam turbines, with a natural gas powered back-up. BrightSource has requested re-alignment of a natural gas pipeline lateral to the project.
Current project (March 2013):
^BrightSource solar power tower project, from PDF PowerPoint on CEC website >>here.
Former Solar Millennium parabolic trough project (early 2012):
^One of two proposed alternatives favored by Solar Millennium to get out of the sand transport corridor (orange-yellow-green bands). (From CEC Revised Staff Assessment)
Solar Trust of America Files for Chapter 11
April 2, 2012 - See story >>here.
Solar Millennium Considers Switching Project to PV
August 25, 2011 - Solar Millennium AG may change the design of its solar thermal plants planned for the US, Manager Magazin reported, citing an unidentified company spokeswoman. Erlangen, Germany-based Solar Millennium is considering switching plants in the Amargosa Valley near Las Vegas, andthe Palen Solar Power Project in Riverside County, California to photovoltaic generation, the magazine said, citing the spokeswoman.
^Desert lily (Hesperocallis undulata) on the Palen project site.
May 15, 2011 - The Bureau of Land Management (BLM) on May 13 released the Final Environmental Impact Statement (FEIS) for the Palen Solar Power Plant project in Riverside County, California.
Palen Solar I, LLC (Palen), a wholly owned subsidiary of Solar Millennium, Inc., has requested a right-of-way authorization to construct and operate the proposed project on approximately 5,200 acres of public lands 10 miles east of Desert Center. The proposed project would construct a 500-megawatt concentrating solar energy generating facility, as well as a transmission line and associated facilities. The project would connect to the planned Red Bluff substation, which would connect the project to the Southern California Edison regional transmission grid.
The BLM's preferred alternative in the FEIS is a modified footprint alternative that includes an optional 240 acres of private land at the south end of the project. The preferred alternative would also include an amendment to the California Desert Conservation Plan. The FEIS analyzes three action alternatives, a no-action alternative and two no-project alternatives that would amend the CDCA Plan. If approved, construction would begin in late 2010.
The FEIS/Proposed CDCA Plan Amendment analyzes the site-specific impacts on air, soil, water, cultural and biological resources as well as land use, noise, visual resources and impacts on Joshua Tree National Park.
Publication of the FEIS and proposed plan amendment initiates a 30-day comment period on the FEIS and a 30-day protest period on the proposed plan amendment. Details on filing a protest can be found in the Federal Register Notice and in the FEIS, both of which are available on the project website, www.blm.gov/ca/st/en/fo/palmsprings/Solar_Projects/Palen_Solar_Power_Project_2.html.
For more information please refer to the project website, or contact Allison Shaffer, BLM project lead, (760) 833-7100 or CAPSSolarPalen@blm.gov. Comments may be faxed to (760) 833-7199, or mailed to Allison Shaffer, Project Manager, Palm Springs South Coast Field Office, BLM, 1201 Bird Center Drive, Palm Springs, CA 92262.
December 15, 2010 - Today the California Energy Commission approved the 500-megawatt Palen Solar Power Project as well as the Rice Solar Energy Project, the smaller power tower at 150 MW. Center for Biological Diversity did a good job of opposing Palen, making a convincing case that CEC violated both the California Environmental Quality Act and their own Warren-Alquist Act, such as approving two project alternatives that Solar Millennium gets to choose from later. Also, parts of the Palen project are in two Wildlife Habitat Management Areas designated by Bureau of Land Management in their North Eastern Colorado Desert Plan, and part in a Desert Wildlife Management Area for tortoise habitat. BLM legally would need to approve a plan amendment to allow energy uses in these areas, and they do not even have a Final Environmental Impact Statement yet out for the project.
CEC summarily dismissed all these arguments.
We brought up the concerns that two prehistoric trails described by archaeologists cross and join on the project site, one from the Mule Mountains and one from the Palen Mountains, both going to the life-giving waters of Corn Springs across the valley to the south. Native people have long known of these trails and decry the destruction of these valuable cultural resources. BLM and CEC seem to ignore these features.
Also, groundwater pumping by the project would admittedly lower water tables, yet no analysis was done of the large Desert ironwood tree groves (Olneya tesota) in the region, and whether they would be impacted.
Plus the project would still directly impact much Mojave fringe-toed lizard (Uma scoparia) habitat. No assurance was given that private land-owners in Chuckwalla Valley who own sand habitats with the lizard would be willing to sell for mitigation lands.
Nevertheless, CEC attorneys tried to shoot down these arguments (in a manner that was not convincing), and the five Commissioners quickly voted to approve the project, adopting the Presiding Member's Proposed Decision.
One Commissioner brought up how Governor-elect Jerry Brown did indeed want a much more aggressive Distributed Generation goal of 12,000 MW (such as rooftop solar panels), but he still wants 8,000 MW of utility-scale solar, so "we have to approve this one," because Brown wants both. Also the usual overrides of biology, visual, and other resource concerns because of the urgency of climate change, the Great Recession that we are in, jobs needed, and "public convenience and necessity."
November 12, 2010 - Proposed Decision Recommends License for Palen Solar Power Project
SACRAMENTO - A California Energy Commission siting committee is recommending approval of the planned Palen Solar Power Project in Riverside County.
In its presiding member's proposed decision (PMPD) released today, the committee recommended either of two alternatives for the 500-megawatt facility that would eliminate impacts on biological resources. The project, even with mitigation measures, will contribute to direct environmental impacts to visual resources and to cumulative
environmental impacts in the areas of cultural resources, visual resources, and land use. However, the benefits of the project would outweigh, and justify a legal override of, those impacts. In addition, the committee determined that the project complies with all applicable laws, ordinances, regulations, and standards.
The PMPD is not a final decision on the project. The committee released the document for 30 days of public comment and will consider input before bringing the proposed decision to the full five-member Commission. The entire document can be found on the Commission's website at:
Palen Solar I, LLC, a subsidiary of Solar Millennium, LLC, is the applicant for the Palen Solar Power Project. The project would be located about 10 miles east of Desert Center and about halfway between the cities of Indio and Blythe in eastern Riverside County.
A right-of-way grant is being sought for approximately 5,200 acres of land managed by the federal Bureau of Land Management. Originally, construction and operation of the 500-MW project would have taken up about 2,970 acres.
The two alternatives recommended in the PMPD reconfigured the project to significantly reduce impacts on the Mojave fringe-toed lizard, sand dune habitat, and sand transport corridor. One alternative disturbs 4,365 acres, while the other alternative would take up about 4,330 acres.
The project is a concentrating solar trough thermal electric generating facility with two adjacent and independent units of 250 megawatts each for a total capacity of 500 megawatts. The proposed project would use parabolic trough technology where parabolic mirrors are used to heat a transfer fluid which is then used to generate steam. Electricity is produced from the steam expanding through steam turbine generators.
The Palen Solar Power Project is among nine large solar thermal projects scheduled to go before the full Commission before the end of the year. More than 4,100 megawatts of solar power will be added if all nine projects are approved.
The seven plants that have already have been licensed are: 250-MW Abengoa Mojave Solar Project (Sept. 8); the 250-MW Beacon Solar Energy Project (Aug. 25); the 1,000-MW Blythe Solar Power Project (Sept. 15); 663.5-MW Calico Solar Project (Oct. 28); the 250-MW Genesis Solar Energy Project (Sept. 29); the 709-MW Imperial Valley Solar Project (Sept. 29); and the 370-MW Ivanpah Solar Electric Generating System project (Sept. 22).
The federal government and the State of California have established the need to increase the development and use of renewable energy in order to enhance the nation's energy independence, meet environmental goals, and create new economic growth opportunities.
More information on the proposed project is at:
Phreatophytes Not Ignored
September 27, 2010 - During a California Energy Commission workshop, Solar Millennium emphasized that it had pulled its project out of a large sand transport corridor along the northern part of the project area (see map above), where Mojave fringe-toed lizards (Uma scoparia) and many rare alkaline-sand-adapted rare plants dwell.
The California Energy Commission agreed that this would lessen the impact to the lizard to less than significant levels, although we still beleive impacts to the sand lizard will be huge. The area will be heavily disturbed, and predators such as Loggerhead shrikes will have more fenceline perches to nab the lizards. The project vivinity may become a sink for the local population.
But at the workshop, the Energy Commission botanist Carolyn Chaney Davis was most concerned about groundwater pumping to phreatophytes, arid-adapted trees with deep roots to access groundwater. Honey mesquite groves (Prosopis glandulosa) surround much of Palen Dry lake about a mile from the proposed project. Other deep-rooted desert trees in the area include Ironwood (Olneya tesota), blue palo verde (Parkinsonia florida), and smoke tree (Psorothamnus spinosus).
A special plan community, the Alkali Sink Scrub, is even more endangered because the shrubs have shallower roots. This community is dominated by Iodine bush (Allenrolfea occidentalis) and Bush seepweed (Suaeda moquinii). These are wetland indicators of playa depressions with a shallow aquifer.
Scientists are not sure of the tolerance of these plants to chasing a lowering groundwater table down. Many phreatophytes have a dimorphic root system, with a shallower root area that can absorb brief rain runoff, and a deep root system to tap into groundwater during most of the year.
Hours were spent during the workshop in a debate between Solar Millennium and CEC, as Chaney Davis wanted a monitoring program to be carried out to see whether the Palen Solar Power Project's well's would impact the trees and alkali scrub nearby. Solar Millennium argued that the dry lake where the phreatophytes and alkali scrub grew was on a shallow perched water table in a playa clay layer, that was completely unconnected to the 150-foot deep groundwater on the alluvial fan under their project site, there fore they could not possibly draw down water in the plant communities of cenocern. Chaney Davis responded that the hydrology was speculative and she wanted monitoring as part of the project's certification. These valuable desert communities have been long ignored, and this time she wanted studies to see if the trees died over the next 30 years.
Solar Millennium said they did not want to be solely responsible for a few trees dying, as this could be due to the nearby agricultural wells. And putting in monitoring boreholes would only make financing the project more difficult, with added costs building up. CEC wanted to err on the side of caution, however. The issue was not resolved, and will be brought up again in further workshops.
^Honey mesquite at Palen Dry Lake.
^Alkali Sink Scrub at Palen Dry lake.
See Concern over spread of Sahara Mustard at the Blythe Solar Power Project >>here.
Cultural Issues Addressed in Video
July 29, 2010 - La Cuna de Aztlán (With Updated Comments By Chemehuevi Tribal Chairman, Charles Wood), video by Robert Lundahl. http://www.vimeo.com/13650564
June Site Visit Report
April Site Visit Report
March 19, 2010 - From the Staff Assessment/Draft Environmental Impact Statement for the Palen Project "1,735 acres of Mojave fringe-toed lizard habitat would be eliminated". The California Energy Commission and Bureau of Land Management have estimated in its joint document that big solar will destroy 16 percent of all fringe-toed lizard habitat in the California Deserts. Members of Basin and Range Watch were on the site March 16, 2010, and we can confirm that this species is abundant there...well, not for much longer.
Mojave Fringe-toed Lizard (Uma scoparia)
The SA/DEIS states: "The PSPP would eliminate 1,735 acres of Mojave fringe-toed lizard habitat in the northeastern portion of the Project Disturbance Area, an area of active wind-blown sand with relatively shallow sand deposits, as well as areas of deeper and more active
vegetated sand dunes. In addition to this direct and immediate loss of habitat, the
project would significantly affect downwind Mojave fringe-toed lizard habitat (see Soil &
Water Appendix A). The northeastern portion of the Project interrupts the regional
wind-borne sand transport corridor that moves sand southeast and east along the
Chuckwalla Valley and toward the Colorado River (Soil & Water Appendix A, Solar
"Staff considers the direct, indirect, and cumulative direct effect of the Project to be
significant for the Chuckwalla Valley Mojave fringe-toed lizard population. The
cumulative impact of all the proposed projects would be to increase the already
fragmented distribution of the Mojave fringe-toed lizards, and to increase the risk of
extirpation of isolated populations within the Chuckwalla Valley. Staff's proposed
Condition of Certification BIO-20 recommends acquisition and protection of core
populations of Mojave fringe-toed lizard habitat elsewhere in the Chuckwalla Valley.
Habitat acquisition would offset some of this habitat loss, although not to less than
significant levels, and cannot remedy the Project's interference with the sand transport
process. Staff considers impacts of the Project, as currently configured, to be significant
Fringe-toed lizards have been reduced or eliminated from small dune systems from off-road traffic and urban development in other areas, now this new threat faces these interesting lizards. (See also our story on Calico Solar 1 habitat >>Sand Lizards.)
Joint Staff Assessment/Environmental Impact Statement Released for Palen Solar Project in Riverside County
Released: March 18, 2010
The project is being jointly developed by Solar Millennium, LLC, and Chevron Energy Solutions.
The 484-megawatt facility, to be located near Palen Dry Lake in Riverside County. The project will utilize solar parabolic trough technology to generate electricity. With this technology, arrays of parabolic mirrors collect heat energy from the sun and refocus the radiation on a receiver tube located at the focal point of the parabola. A transfer fluid is heated (dangerous Therminol) to approximately 750 degrees Fahrenheit as it circulates through the receiver tubes, then piped through a series of heat exchangers where it releases stored heat to generate high-pressure steam. The steam is fed to a traditional steam turbine generator where electricity is produced. The 5,200 acre project site is located approximately 10 miles east of Desert Center, along Interstate 10, approximately halfway between the cities of Indio and Blythe in Riverside County.
For additional details on the Palen Solar Project SA/DEIS, click on:
The Palen site is 10 miles east of Desert Center, California and a half mile north of Interstate 10. The proposed Palen Solar Power Project would consist of two parabolic trough solar thermal power plants, each of which would have a solar field comprised of rows of parabolic mirrors focusing solar energy on collector tubes. The tubes would carry heated oil to a boiler, which would then send steam to a turbine. The two phases would generate approximately 484 MW of electricity. The two power plants would share administrative buildings, parking areas, maintenance buildings, switch yards, bioremediation areas, wastewater treatment facilities, access and maintenance roads, and perimeter fencing. The project would also include a natural gas pipeline, communication lines, and a 230 kV transmission line. The total expected project footprint would be approximately 3,800 acres. During construction, the project would require approximately 1,100 acre-feet of water for dust control and soil compaction. During operation, the project would require approximately 300 acre-feet of water per year. CESSM proposes to use water from new wells. The Palen facility would be constructed in two phases.
^Old version of project.