Big Stone II Power Plant and Transmission Project Final Environmental Impact Statement (DOE/EIS-0377), 42667-42670 [E9-20300]

Agencies

• DEPARTMENT OF ENERGY
• Western Area Power Administration

[Federal Register Volume 74, Number 162 (Monday, August 24, 2009)]
[Notices]
[Pages 42667-42670]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E9-20300]


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DEPARTMENT OF ENERGY

Western Area Power Administration


Big Stone II Power Plant and Transmission Project Final 
Environmental Impact Statement (DOE/EIS-0377)

AGENCY: Western Area Power Administration, DOE.

ACTION: Record of Decision.

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SUMMARY: The Western Area Power Administration (Western) received an 
application to interconnect the Big Stone II Power Plant and 
Transmission Project (Project) into Western's transmission system. The 
Project entails the construction of a new 600-megawatt (MW) coal-fired 
electric power generating station adjacent to the existing Big Stone 
plant in Grant County, South Dakota. The Project also includes 
approximately 140 miles of new or upgraded transmission lines. On June 
26, 2009, Western published a notice of the availability of the Final 
Environmental Impact Statement (EIS) on the Project (74 FR 30559). 
Western considered the environmental impacts of the Project and has 
decided to allow the request to interconnect at Western's Morris and 
Granite Falls substations located in Minnesota.

FOR FURTHER INFORMATION CONTACT: For further information, please 
contact Mr. Matt Blevins, NEPA Document Manager, Big Stone II EIS, 
Western Area Power Administration, A7400, P.O. Box 281213, Lakewood, CO 
80228, telephone (800) 336-7288, fax (720) 962-7263, or e-mail 
BigStoneEIS@wapa.gov. For general information on DOE's NEPA review 
process, please contact Carol M. Borgstrom, Director, Office of NEPA 
Policy and Compliance, GC-20, U.S. Department of Energy, Washington, DC 
20585, telephone (202) 586-4600 or (800) 472-2756.

SUPPLEMENTARY INFORMATION: Western is a Federal agency under the U.S. 
Department of Energy (DOE) that markets and transmits wholesale 
electrical power through an integrated 17,000-circuit mile, high-
voltage transmission system across 15 western states. The Project is 
located within Western's Upper Great Plains Region, which operates and 
maintains nearly

[[Page 42668]]

100 substations and nearly 7,800 miles of Federal transmission lines in 
Minnesota, South Dakota, North Dakota, Montana, Nebraska, and Iowa. 
Western's Open Access Transmission Service Tariff (Tariff) provides 
open access to its transmission system. Western provides these services 
through an interconnection if there is available capacity on the 
transmission system, while protecting the transmission system 
reliability, and considering the applicant's objectives. Western's 
Federal involvement is related to the determination of whether to 
approve the interconnection request for the Project. Western's Proposed 
Action is to interconnect the Project to Western's transmission system.

Applicant's Objectives and Project

    The Project proposed by Otter Tail Corporation (dba Otter Tail 
Power Company), Central Minnesota Municipal Power Agency, Heartland 
Consumers Power District, Montana-Dakota Utilities Company, and Western 
Minnesota Municipal Power Agency (dba Missouri River Energy Services), 
collectively referred to as the Co-owners, is a new 600-MW (net) coal-
fired electric generating station and associated transmission lines and 
substation upgrades.
    The Co-owners objectives include a combination of the following:
     Satisfy load growth;
     Replace current capacity and energy contracts that expire;
     Reduce reliance on energy production from existing oil- 
and gas-fired generating capacity and the associated higher costs and 
volatility of fuel costs;
     Reduce reliance on and exposure to power market prices;
     Address the limited deliverability of future capacity and 
energy purchases due to transmission constraints.
    The Co-owners' proposed Project includes constructing and operating 
the Big Stone II coal-fired power plant and groundwater system, 
transmission additions and modifications, and substation additions and 
modifications. The Project would include a pulverized coal-fired, 
super-critical boiler using low-sulfur, Powder River Basin coal. The 
boiler would provide steam to a single steam turbine generator that 
would convert the mechanical energy of the steam turbine to electrical 
energy. A water-cooled steam condenser would accept the steam exhausted 
from the turbine and a circulating water system would supply cooling 
water from a wet cooling tower to the water-cooled steam condenser to 
dissipate the energy in the condensing steam. The wet cooling system 
would use surface water as the primary water supply and groundwater as 
the back-up water supply. The Project also includes installation of 
groundwater wells and a pipeline system to convey groundwater to the 
proposed plant site and other facilities associated with the use of 
groundwater for the Project.

Alternatives Considered

    Western, in its preparation of the EIS, evaluated several 
categories of alternatives over which Western has no decision-making 
authority.\1\ Western's Federal involvement is related to the 
determination of whether to approve the Co-Owners' interconnection 
request for the Project. The Proposed Action was to allow the 
interconnection request and the resulting Project. Under the No Action 
alternative, Western would deny the interconnection request. Western 
analyzed three likely scenarios under the No Action alternative: (1) 
The Co-owners would not proceed with the proposed Project, and the Co-
owners would not secure alternate baseload generation and would not 
seek alternate transmission configurations, referred to as the No-Build 
Alternative in the Final EIS; (2) the Co-owners would not proceed with 
the proposed Project, and the Co-owners would likely fulfill their 
generation and transmission needs individually or cooperatively through 
alternative arrangements by seeking generation capacity and energy from 
other sources, if available, referred to as Sub-Alternative 1 in the 
Final EIS; and (3) the Co-owners would likely proceed with the 
construction and operation of the proposed Big Stone II Power Plant in 
order to fulfill their objectives (as discussed above), but instead of 
obtaining transmission interconnections to the Federal transmission 
system, the Co-owners would be required to seek an alternative 
transmission configuration that would provide firm transmission service 
on the Midwest Independent System Operator (MISO) system or to purchase 
non-firm transmission rights from MISO over the MISO system, referred 
to as Sub-Alternative 2 in the Final EIS.
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    \1\ The South Dakota Public Utilities Commission (SDPUC) has 
previously approved the construction and operation of the Big Stone 
II power plant. Likewise SDPUC and the Minnesota Public Utilities 
Commission have previously approved the transmission line route.
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    Although the No Action alternative would eliminate Western's role 
in the Co-owners' proposed Project, the environmental impacts would 
likely still occur, as described under the sub-alternatives to the No 
Action alternative (described above), since the Co-owners would likely 
proceed with the construction and operation of the proposed power plant 
or would obtain the necessary generation capacity from another facility 
with similar environmental impacts as the proposed Project.
    As required by 40 CFR 1505.2(b), Western has identified the No-
Build Alternative as its environmentally preferred alternative. Under 
this alternative, Western would deny the interconnection request and 
not modify its transmission system to interconnect the proposed Project 
with its transmission system. Under this alternative, there would be no 
modifications to Western's transmission system, and thus no new 
environmental impacts. The Co-owners purpose and need would not be met.
    In addition to analyzing the decision contemplated by Western, the 
Final EIS discussed several additional alternatives considered by the 
Co-owners, including two transmission alternatives and two cooling 
technology alternatives.
    Several additional alternatives were considered but dismissed from 
detailed analysis and include the following: power generation 
technology alternatives, cooling technology alternatives, power plant 
location alternatives, transmission line technology alternatives, and 
transmission line corridor alternatives.

Mitigation Measures

    Through public participation in the NEPA process as well as the 
concurrent permitting processes the Co-owners have undergone with other 
agencies, the Co-owners have altered the design of the proposed Project 
to minimize harm to the environment. For example, the Co-owners 
modified the original proposed Project to include a back-up water 
supply system using groundwater to avoid wetlands. Additionally, as 
part of the settlement agreement with the Minnesota Department of 
Commerce, the Co-owners are required to offset 100 percent of the 
carbon dioxide emissions attributable to the proposed Project's 
Minnesota consumers for a four-year period from the start of commercial 
operation. The Co-owners have also agreed to install mercury control 
technology that is most likely to remove at least 90% of mercury 
emitted from both the existing and proposed plants.
    The Co-owners have committed to the mitigation measures as 
described in Tables 2.2-7, 2.2-8 and 2.6-2 of the Final EIS. The 
measures were designed to avoid and minimize harm to the environment 
from the proposed Project. In addition, Western will implement 
mitigation measures applicable to any

[[Page 42669]]

system modifications performed at Western facilities for proposed 
Federal action as described in Table 2.2-9 in the Final EIS.
    With the above mentioned project modifications and agreements and 
implementation of the mitigation measures, all practicable means to 
avoid or minimize environmental harm from the proposed Project and 
Western's Federal Proposed Action have been adopted.

Comments on Final EIS

    Western received comments from the U.S. Environmental Protection 
Agency (EPA) in a letter dated July 27, 2009, and from the Minnesota 
Department of Natural Resources (MnDNR) in a letter dated July 29, 
2009. Based on a review of these comments, Western has determined that 
it is clear the comments do not present any significant new 
circumstances or information relevant to environmental concerns and 
bearing on the proposed Project or its impacts, and thus a Supplemental 
EIS is not required. The basis for this determination is summarized 
below.
    EPA's letter noted several improvements to the project including 
the avoidance of wetlands, installation of mercury control equipment, 
and a partial offset of carbon dioxide emissions.
    EPA's letter noted an apparent discrepancy in the Final EIS 
regarding mercury emissions at the proposed plant. The EPA correctly 
noted that the mercury emission limit in the Title V Air Quality Permit 
is 189 pounds (lbs) per year for the combined existing and proposed 
plants. The EPA also noted a mercury emission goal of 81.5 lbs per year 
for the combined plants. Western does not view this as a discrepancy, 
since the 81.5 lbs represents the actual estimated annual emission 
level that may be achieved after implementation of pollution controls, 
which is less than the annual emission limit of 189 lbs allowed by the 
Title V permit. The estimated annual emission of 81.5 lbs is based on 
the voluntary Settlement Agreement between the Co-owners and the 
Minnesota Department of Commerce, in which the Co-owners agreed to 
install control equipment for the existing plant and the proposed plant 
that is expected to remove at least 90 percent of the mercury emitted 
from the existing plant and proposed Big Stone II plant combined. Based 
upon the expected content of mercury for Powder River Basin coal 
(containing about 0.0715 parts per million by weight mercury, the 
approximate value expected for the coal used by the proposed Project), 
a 90 percent removal would result in annual emissions of approximately 
81.5 lbs of mercury. Additionally, the 81.5 lb estimate is less than 
the estimated 189.6 lb of mercury emissions reported from the existing 
Big Stone plant in 2004. Therefore, if the proposed Big Stone II plant 
is constructed (and after implementation of emissions controls), 
mercury emissions from both plants would be less than the emissions 
from the existing plant, a reduction of approximately 57 percent when 
compared to 2004 values. As part of the Settlement Agreement, the Co-
owners agreed to act in good faith to install control equipment as 
expeditiously as possible. However, in accordance with the Settlement 
Agreement, the Co-owners have four years after the commercial operation 
date of Big Stone II to achieve compliance with this requirement.
    EPA's letter notes that the U.S. Global Change Research Program 
(USGCRP) published the June 2009 report, ``Global Climate Change 
Impacts in the United States.'' Drawing from a large body of scientific 
information and produced by a consortium of experts from government 
science agencies, universities, and research institutes, the report 
summarizes the science of climate change and the impacts of climate 
change on the United States, now and in the future. Concluding that 
global warming is unequivocal, the report states that the ``global 
warming observed over the past 50 years is due primarily to human-
induced emissions of heat-trapping gases,'' primarily from the burning 
of fossil fuels. The report reviews the well-known global climate 
change topics and relates those same issues to the impacts forecasted 
to affect the U.S., particularly relating to predicted temperature and 
precipitation changes, extreme weather events, and sea level changes. 
Considerable discussion is devoted to impacts on water resources, 
agriculture, and ecosystems, as well as changes in the way the U.S. 
will generate and use energy (including future development of renewable 
energy resources), and potential impacts to air, rail, shipping, and 
road transportation. The report also discusses climate-related health 
impacts and the ways that climate change will affect society through 
impacts on the necessities and comforts of life. Many of these issues 
are discussed in greater detail in a consideration of climate change 
impacts to each of the regional geographic areas of the U.S. 
Predictions of climate change and future conditions come from analyses 
of computer models that simulate climate scenarios to which USGCRP 
relates, ``there is always some level of uncertainty.'' Nevertheless, 
USGCRP cites, ``the science of making skillful projections at these 
scales has progressed considerably, allowing useful information to be 
drawn from regional climate studies.'' Climate modeling in the report 
indicates there will be adverse impacts due to climate change affecting 
the three-state region (i.e., South Dakota, North Dakota, and 
Minnesota) around the proposed Big Stone II plant. Examples of these 
effects, some positive and some negative, include increases in 
precipitation, including more frequent heavy downpours resulting in 
more flooding, rising temperatures and more frequent heat waves, longer 
growing seasons, and shifts in vegetation hardiness zones. Ecosystem 
disruptions causing changes in habitat, water, and food supply would 
cause some species to decline, cause shifts in the range of native 
species, or encourage invasions of non-native species. Some species 
would be better adapted to a warmer climate. A warmer climate would 
affect air quality, and would generally mean more ground-level ozone, 
causing more respiratory problems. Western notes the potential regional 
effects identified in the report are similar to the global effects 
discussed in the Final EIS, which EPA concluded ``the analysis provided 
in the Final EIS regarding green house gas emissions from the proposed 
plant is robust and accurate.''
    MnDNR's letter expressed concerns that the Final EIS does not 
appear to address its concerns, but ``just reiterates claims made in 
the Draft EIS'' and that use of water from Big Stone Lake by the 
proposed plant would have serious impacts to water levels in the lake 
and base flow in the Upper Minnesota River during extended periods of 
drought and low runoff. In their letter, the MnDNR also asserted that 
the operating plan for the Big Stone Lake Dam is outdated and does not 
adequately address the public's interest when considering the proposed 
plant's water appropriation. Western notes that the Project's Co-owners 
made significant changes in the proposed Project after the May 2006 
Draft EIS, and these changes were fully disclosed in a Supplemental 
Draft EIS issued in October 2007. MnDNR provided comments on the 
Supplement Draft EIS and as a result additional information was added 
to the Final EIS, including detailed responses to groundwater and 
surface water comments as noted in Volume II of the Final EIS. In 
summary, the South Dakota Water Management Board (SDWMB) issued Water 
Permit No. 6678-3 on November 1, 2006, which authorizes an additional 
10,000

[[Page 42670]]

acre-feet of water annually from Big Stone Lake. The permit specifies 
the diversion rates allowed by the proposed plant, authorizes the 
construction of the water use system, and the placing of water to 
beneficial use subject to certain conditions. The permit includes the 
same withdrawal restrictions based on Big Stone Lake water levels and 
time of year as in the permit for the existing plant. The water 
appropriation permit was issued by the SDWMB in the interest of public 
policy, and thus water appropriations by the proposed Project are in 
conformance with South Dakota laws. The SDWMB, in issuing the permits 
for water withdrawal, have determined that the proposed water use would 
not be damaging for the intended purpose. Additionally, in accordance 
with the Settlement Agreement approved by the Minnesota Public 
Utilities Commission, the Project's Co-owners have agreed to provide 
all data used to evaluate the effects of water withdrawals from Big 
Stone Lake to the South Dakota Department of Environment and Natural 
Resources and MnDNR and to participate in meetings with State agencies 
to address the management of the Big Stone Lake water flow and level 
issues. Western notes MnDNR's desire to have the Minnesota/South Dakota 
Boundary Commission reconvened, however, that decision rests with the 
respective State governors.

Decision

    Western's environmental record of decision (ROD) is to allow the 
Co-Owners' request for interconnection to Western's transmission system 
at Morris and Granite Falls substations in Minnesota and to complete 
modifications to these substations to support the interconnection.\2\ 
Western's environmental decision to grant this interconnection request 
satisfies the agency's statutory mission and the Co-owners' objectives 
while minimizing harm to the environment. Additionally, an 
interconnection agreement must be completed in accordance with 
Western's Tariff.
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    \2\ Western's authority to issue a record of decision is 
pursuant to authority delegated on October 4, 1999, from the 
Assistant Secretary for Environment, Safety and Health to Western's 
Administrator.
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    The Co-owners have committed to minimize the propose Project's 
impact on the environment through the Project's design, the use of 
pollution control technology, the offset of carbon dioxide emissions, 
and the implementation of mitigation measures as summarized in Tables 
2.2-7, 2.2-8, and 2.6-2 of the Final EIS. For its part, Western will 
adhere to mitigation measures for all modifications at its Morris and 
Granite Falls substations as noted in Table 2.2-9 of the Final EIS. 
Western conditions its environmental approval of the Co-owner's request 
to interconnect to Western's transmission system upon the adoption and 
implementation of the mitigation measures as described in the Final 
EIS.
    This decision is based on the information contained in the Big 
Stone II Power Plant and Transmission Project Final EIS (DOE/EIS-0377). 
This ROD was prepared pursuant to the requirements of the Council on 
Environmental Quality Regulations for Implementing NEPA (40 CFR parts 
1500-1508) and DOE's Procedures for Implementing NEPA (10 CFR part 
1021).

    Dated: August 14, 2009.
Timothy J. Meeks,
Administrator.
[FR Doc. E9-20300 Filed 8-21-09; 8:45 am]
BILLING CODE 6450-01-P