Estes to Flatiron Transmission Lines Rebuild Project Environmental Impact Statement (DOE/EIS-0483), 10487-10490 [2019-05385]

Agencies

• DEPARTMENT OF ENERGY
• Western Area Power Administration

[Federal Register Volume 84, Number 55 (Thursday, March 21, 2019)]
[Notices]
[Pages 10487-10490]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2019-05385]


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DEPARTMENT OF ENERGY

Western Area Power Administration


Estes to Flatiron Transmission Lines Rebuild Project 
Environmental Impact Statement (DOE/EIS-0483)

AGENCY: Western Area Power Administration, DOE.

ACTION: Record of decision; floodplain statement of findings.

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SUMMARY: The Western Area Power Administration (WAPA) issued the Final 
Environmental Impact Statement (EIS) (DOE/EIS-0483) for the Estes to 
Flatiron Transmission Lines Rebuild Project (Project) on April 13, 
2018. The Agency Preferred Alternative developed by WAPA through the 
National Environmental Policy Act (NEPA) process and described in the 
Final EIS is summarized in this Record of Decision (ROD). This 
alternative is also the Environmentally Preferred Alternative for the 
Project. All practicable means to avoid or minimize environmental harm 
have been adopted.
    WAPA has selected the Agency Preferred Alternative identified in 
the Final EIS for implementation.

ADDRESSES: The Final EIS, this ROD, and other Project documents are 
available on the Project website at https://www.wapa.gov/transmission/EnvironmentalReviewNEPA/Pages/estes-flatiron.aspx.

FOR FURTHER INFORMATION CONTACT: For information on WAPA's 
participation in the Project contact Brian Little, Environmental 
Manager J0400, Rocky Mountain Regional Office, Western Area Power 
Administration, P.O. Box 3700, Loveland, CO 80539-3003, telephone (970) 
461-7287, facsimile (720) 962-7083, email blittle@wapa.gov. For 
information about the Project EIS process, contact Mark J. Wieringa, 
NEPA Document Manager, Natural Resources Office A9402, Headquarters 
Office, Western Area Power Administration, P.O. Box 281213, Lakewood, 
CO 80228-8213, telephone (720) 962-7448, facsimile (720) 962-7263, 
email wieringa@wapa.gov.

SUPPLEMENTARY INFORMATION: WAPA, a Power Marketing Administration 
within the U.S. Department of Energy (DOE), is proposing to rebuild and 
upgrade two 115-kilovolt (kV) single-circuit transmission lines between 
Flatiron Substation west of Flatiron Reservoir and the intersection of 
Mall Road and U.S. Highway 36 on the east side of Lake Estes in Estes 
Park, all within Larimer County, Colorado. The Project area is situated 
east of the community of Estes Park and west of the Town of Loveland. 
Major transportation corridors are U.S. Highways 36 and 34, which 
provide access between Front Range communities to the east and Rocky 
Mountain National Park to the west of the Project area. The Project 
area includes private lands in Larimer County, and public lands 
administered by the U.S. Department of the Interior (DOI), Bureau of 
Reclamation; U.S. Department of Agriculture, Forest Service (Forest 
Service); the Colorado State Land Board; Northern Colorado Water 
Conservancy District; and Larimer County. The Forest Service, through 
the Canyon Lakes District of the Roosevelt National Forest, was a 
cooperating agency in the preparation of the EIS, and that agency will 
issue its own ROD addressing the Federal actions within its 
jurisdiction and authority.
    WAPA owns, operates, and maintains two single-circuit 115-kV 
transmission lines between the Flatiron Substation and Estes Park 
Substation. Prior to the formation of the DOE, the DOI's Bureau of 
Reclamation constructed and maintained the two existing transmission 
lines as part of the Colorado-Big Thompson Project. The lines were 
constructed to transmit electricity from hydropower generation sources 
of the Colorado-Big Thompson Project. After the formation of the DOE 
and WAPA in 1977, ownership, operation, and maintenance of the 
transmission lines was transferred from the Bureau of Reclamation to 
WAPA.
    The Estes-Lyons Tap is the more northern of the two lines and is 
also referred to as the North Line. The South Line consists of the 
Estes-Pole Hill and Flatiron-Pole Hill line segments that connect the 
Pole Hill Substation to the Estes Park and Flatiron substations, 
respectively. Both existing transmission lines are 115-kV single-
circuit lines

[[Page 10488]]

constructed on wood pole H-frame structures. The North Line is 14.1 
miles long and was constructed in 1938, while the South Line is 14.5 
miles in length and was constructed in 1953. WAPA's Project only 
encompasses the single-circuit wood-pole transmission lines to the 
intersection of Mall Road and U.S. Highway 36, where both lines 
intersect at a lattice steel structure; the Project does not include 
the double-circuit steel lattice structures that start at that point, 
parallel the U.S. Highway 36 causeway across Lake Estes, and terminate 
at the Estes Park Substation.

Project Description

    WAPA proposes to remove both wood pole lines and replace them with 
a new line or lines, for the following reasons. The existing wood 
structures are in poor condition and continue to deteriorate due to 
both age and the type of material with which they were constructed. 
Many of the existing wood poles on both lines suffer from core rot and 
cracking, and have reached or are reaching the end of their anticipated 
facility life. The majority of wood structures will need replacing in 
the near future to meet the strength and safety requirements found in 
National Electric Safety Code standards.
    At one time there was access to the existing transmission line 
structures for construction and maintenance. However, in the 60 to 75 
years since the transmission lines were built, access has deteriorated 
at many locations. Portions of the existing lines are marginally 
accessible for routine maintenance and structure replacement. 
Inaccessible areas include sections of the existing transmission lines 
that span canyons, are located on steep cliffs or rocky slopes, or 
cross the Pole Hill penstock (the water pipelines between Pinewood and 
Flatiron reservoirs).
    Portions of the existing transmission lines run parallel to each 
other in relatively close proximity. Each line has a separate right-of-
way (ROW). The North Line has a ROW width of only 20 to 30 feet at most 
locations, which is inadequate to meet reliability and safety 
standards. The South Line has ROW widths that range from 75 feet to 130 
feet for most of its length. WAPA would need to increase the South Line 
ROW easement width to 110 feet in locations where it is less. The 
Project area is susceptible to mountain pine beetle infestation and 
currently has many infested trees that create heavy fuel loads for 
wildfires. Where ROWs have insufficient width and heavy fuel loading, 
there is a greater risk of a large wildfire event. This level of risk 
does not meet applicable standards or WAPA's commitment to its 
customers to provide reliable and safe power.
    In many cases, ROW maintenance has been limited to removal of 
hazard trees. This practice typically does not address the encroaching 
vegetation until it becomes a threat that requires immediate attention 
to ensure no adverse effect to the transmission line or to prevent a 
fire caused by a transmission line. This reactive approach to hazardous 
vegetation maintenance is not conducive to ensuring the level of 
operating reliability that is required by today's North American 
Electric Reliability Corporation standards, nor is it efficient or cost 
effective. Today's stricter maintenance standards require a more 
proactive approach to vegetation management, with the goals of ensuring 
that there will be no tree-caused transmission line outages and 
minimizing the risk for wildfires.

Alternatives

    Four full-length alternatives and three variants form seven action 
alternatives to rebuild and upgrade the existing 115-kV transmission 
lines. These seven alternatives were analyzed in addition to the No 
Action Alternative. All alternatives, including the No Action 
Alternative, would require improved access, including new access roads, 
and widening the ROW to 110 feet where it is presently less. North Line 
alternatives would all require the removal and reroute of a short 
section of line through a subdivision near Pinewood Reservoir, where 
encroachments on the inadequate ROW do not allow for rebuilding a 
transmission line. The EIS also disclosed that portions of the 
alternatives could be combined during the decision-making process. The 
alternatives are briefly described below:
    The No Action Alternative would not rebuild the old lines, but 
structures and other line components would be replaced by maintenance 
forces over time. Alternative D would entirely rebuild both lines with 
new structures and conductors similar to the existing ones; essentially 
it is a replacement in kind alternative. The existing wood pole H-frame 
structures are 65 to 75 feet tall; Alternative D would use wood pole 
structures 5 to 10 feet taller.
    Alternative A would rebuild and consolidate the transmission lines 
primarily on the existing North Line ROW. Structures would be 
galvanized steel, single pole, double-circuit structures approximately 
40 feet taller than the existing structures, and would be the same for 
all other alternatives using steel structures. If structure-for-
structure replacement is used in visually sensitive areas, those steel 
monopole structures would be about 85 feet tall, and closer together. 
Alternative A includes a reroute to the north and northeast of Newell 
Lake View subdivision and along Mall Road in Estes Park. Variant A1 is 
identical to Alternative A for all but the westernmost segment. At a 
point in the valley between Mount Olympus and Mount Pisgah, this 
routing variation would depart from the alignment of the existing North 
Line and traverse along the base of Mount Pisgah before turning to the 
northwest and generally following an alignment parallel to U.S. Highway 
36 for the remaining distance to the existing steel lattice double-
circuit structure at the intersection of U.S. Highway 36 and Mall Road. 
Variant A2 follows an alignment similar to Variant A1 except the 
westernmost 2.7 miles of the transmission line would be constructed 
underground.
    Alternative B would rebuild and consolidate the transmission lines, 
primarily on the existing South Line ROW. This alternative includes a 
0.25-mile reroute along Pole Hill Road on National Forest System lands, 
and a 0.75-mile reroute to the North Line on new ROW in the vicinity of 
Pole Hill Substation.
    Alternative C would rebuild and consolidate the transmission lines 
along an alignment utilizing a combination of the existing North and 
South line ROWs. This alternative includes reroutes off the existing 
transmission line ROW east of Pinewood Reservoir, along Pole Hill Road 
on National Forest System lands, and on privately held land on the west 
end of the Project area. Variant C1 would similarly rebuild and 
consolidate the transmission lines along an alignment similar to 
Alternative C, except that the westernmost 2.7 miles of the 
transmission line would be constructed underground.
    Alternatives A, A1, A2, B, C, and C1 would all result in the 
abandonment of one ROW, and consolidation on the other, although the 
alternatives vary in what sections of the two ROWs would be abandoned.

Agency Preferred Alternative

    WAPA, with input from the Forest Service (Canyon Lakes District of 
the Roosevelt National Forest), has selected the Agency Preferred 
Alternative identified in the Final EIS for implementation. The Agency 
Preferred Alternative would be a new galvanized steel, single-pole, 
double-circuit line between Flatiron Substation and U.S. Highway 36 at 
the intersection of Mall Road using the Alternative C alignment in the 
west and primarily the

[[Page 10489]]

Alternative C alignment in the center, and the Alternative B alignment 
in the east. In the west region, the Agency Preferred Alternative would 
follow the Alternative C alignment along Pole Hill Road through the 
Meadowdale Hills subdivision to U.S. Highway 36. In adapting part of 
Alternative C for the Agency Preferred Alternative, the four-wheel 
drive segment of West Pole Hill Road would not be reconstructed or 
improved on National Forest System land, retaining the challenge for 
four-wheel drive use in response to Draft EIS public comments. New 
access would be needed in the west region for construction and 
maintenance. The previous access road has been closed as a result of 
flood damage. In addition, instead of crossing over U.S. Highway 36, 
the Agency Preferred Alternative would follow the Alternative C 
alignment for 1.7 miles, generally parallel to and north of U.S. 
Highway 36 down the valley for the remaining distance to the 
intersection of Mall Road and U.S. Highway 36.
    New ROW would be required for the last segment on the west end of 
Alternative C to reduce visibility from U.S. Highway 36. Special design 
measures will be considered for this segment within the Meadowdale 
Hills subdivision, including the use of structures with a lower height 
and shorter span, if they provide a lower visual impact. This option 
could result in a structure-for-structure replacement instead of 
eliminating some structures entirely. After design options have been 
developed with specific structure locations, they will be shared with 
the affected parties.
    In the central region on private lands, the Agency Preferred 
Alternative primarily would follow the North Line, but may shift to the 
South Line and back again to stay closer to Pole Hill Road, thus 
minimizing the need for access roads and ROW maintenance disturbance. 
Additional ROW would need to be obtained along the North Line to meet 
the 110-foot requirement.
    In the east region, from the Flatiron Substation the Agency 
Preferred Alternative would follow the Alternative B alignment along 
the existing South Line to the Pole Hill Substation. Just east of the 
Pole Hill Substation the Agency Preferred Alternative would continue to 
follow the alignment of Alternative B which would turn north and 
partially parallel Lone Elk Road for 0.75 mile until intersecting the 
alignment of the existing North Line. A new ROW along existing roads 
would be required for this short segment, as well as new access spur 
roads to new structures. Shifting to the North Line alignment at this 
point would avoid crossing the Pole Hill Penstock and the steep and 
rocky terrain west of the Pole Hill Substation.
    At locations where the Agency Preferred Alternative alignment would 
follow the existing transmission line routes, the existing structures 
would be replaced with new double-circuit galvanized steel monopole 
structures. Individual structure locations could vary depending on 
final design. Increasing the number of transmission line structures 
near National Forest System roads could change the visual nature and 
impact of human development for recreational users of the roads. WAPA 
would not increase the number of structures along National Forest 
System roads, and depending on final design there may be fewer 
structures in these locations.
    On abandoned ROW, existing structures and conductors would be 
removed, vegetation management would cease, and the ROW allowed to 
return to natural vegetation patterns. The Agency Preferred Alternative 
would avoid the fen wetlands identified in the Project area.

Environmentally Preferred Alternative

    The Agency Preferred Alternative is also overall the 
Environmentally Preferred Alternative for the Project. Using the 
tabular impact data developed for the Final EIS, Alternative B comes 
out very slightly environmentally preferred compared to the Agency 
Preferred Alternative. The few sections of the Agency Preferred 
Alternative where new ROW would be required would result in new 
environmental resource disturbance in those sections; the effects of 
this new disturbance are captured in the impact tables. However, these 
new sections were developed to reduce specific recognized important 
impacts, both existing and associated with the Project. The net effect 
on environmental resources of these departures from the existing ROW 
would be positive, and outweigh the slight calculated advantage of 
Alternative B. The Agency Preferred Alternative would also result in 
the abandonment of approximately half the existing linear ROW, allowing 
for natural regeneration and the removal of easement encumbrances on 
private and public landowners.

Floodplain Statement of Findings

    Notification of potential floodplain action was included in the 
Notice of Intent for this Project (77 FR 22774 (Apr. 17, 2012)). 
Potential impacts to floodplains were analyzed as an integral part of 
the NEPA process. The Project is located in a mountainous area, and 
most surface water features are ephemeral or intermittent drainage 
channels that run during rainstorms and snow melt. These channels are 
typically very narrow and are spanned by transmission lines, as 
structures are typically sited on higher ground to increase span 
lengths. The Project makes use of existing transmission ROWs, and 
access is a combination of public, private, and National Forest System 
roads, and spurs to reach structure locations. Approximately 30 
culverts are associated with existing access. The North Fork of the 
Little Thompson River is the only perennial stream crossed by the 
Project, and it would be spanned by the transmission line and crossed 
using existing road crossings. The Agency Preferred Alternative avoids 
the Big Thompson River Special Flood Hazard Area.
    An existing access road across a small fen on the National Forest 
has been closed and would no longer be used. The Agency Preferred 
Alternative would avoid the ephemeral wet meadow crossed by the west 
end of the existing North Line on the west end. The existing 
transmission line structures would be removed, access would no longer 
be required, and the ROW abandoned. A few additional structures 
currently located in seasonal wetlands would be relocated outside of 
the wetlands, and the existing structures removed during dry periods or 
when the ground is frozen. WAPA also has standard construction 
practices and environmental protection measures to protect floodplains, 
wetlands, and riparian areas, and these are specifically committed to 
in table 2.5-1 and section 2.5 of the Final EIS and by issuance of this 
ROD. Given the lack of new impacts from the Project, the removal of 
existing infrastructure and access presently located in floodplains and 
wetlands, and the abandonment of one entire ROW, the construction of 
the Project would result in a net improvement to these resources as 
compared to current conditions.

Section 7 and Section 106 Consultation

    WAPA consulted with the Fish and Wildlife Service under Section 7 
of the Endangered Species Act. This consultation resulted in a November 
9, 2017, letter from the Fish and Wildlife Service concurring with a 
determination of ``not likely to adversely affect'' listed species that 
could occur in the Project area.
    WAPA consulted with the Colorado State Historic Preservation Office 
(SHPO) and the Cheyenne and Arapaho tribes of Oklahoma, Northern 
Arapaho

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Tribe, Northern Cheyenne Tribe, Oglala Sioux Tribe, Shoshone Tribe of 
the Wind River Reservation, Southern Ute Indian Tribe, Ute Indian Tribe 
of the Uintah and Ouray Reservation, and the Ute Mountain Tribe. The 
opportunity to consult was also extended to the Estes Park Museum.
    The SHPO has concurred with WAPA's findings of No Adverse Effect on 
historic properties within the area of direct effects, No Historic 
Properties Affected for indirect visual effects, and an overall Project 
finding of No Adverse Effects for the Agency Preferred Alternative. The 
Southern Ute Indian Tribe was the only tribe or entity that responded, 
asking for further information. WAPA extended the review period to 
accommodate that request. WAPA remains open to Native American comment 
should any be made.

WAPA's Decision

    Informed by the analyses and environmental impacts documented in 
the Final EIS and related consultations, WAPA has selected the Agency 
Preferred Alternative identified in the Final EIS and summarized above 
as its decision for the Project. The Agency Preferred Alternative route 
will be the basis for design and engineering activities that will 
finalize the centerline, ROW, and specific structure and access road 
locations. Additionally, this ROD commits WAPA to implement the 
standard construction practices listed in table 2.5-1, the Project-
specific design criteria and construction practices in section 2.5.2, 
and the vegetation management practices described in appendix B of the 
Final EIS to minimize environmental impacts. All practicable means to 
avoid or minimize environmental harm have been adopted, and the Project 
will result in a net environmental benefit.
    This ROD was prepared in accordance with the requirements of the 
Council on Environmental Quality regulations for implementing NEPA (40 
CFR parts 1500-1508) and U.S. Department of Energy NEPA regulations (10 
CFR part 1021).

    Dated: March 13, 2019.
Mark A. Gabriel,
Administrator,Western Area Power Administration.
[FR Doc. 2019-05385 Filed 3-20-19; 8:45 am]
 BILLING CODE 6450-01-P