Shawnee Fossil Plant Coal Combustion Residual Management, 54162-54164 [2018-23427]

Agencies

• Tennessee Valley Authority

[Federal Register Volume 83, Number 208 (Friday, October 26, 2018)]
[Notices]
[Pages 54162-54164]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2018-23427]


=======================================================================
-----------------------------------------------------------------------

TENNESSEE VALLEY AUTHORITY


Shawnee Fossil Plant Coal Combustion Residual Management

AGENCY: Tennessee Valley Authority.

ACTION: Issuance of Record of Decision.

-----------------------------------------------------------------------

SUMMARY: This notice is provided in accordance with the Council on 
Environmental Quality's regulations and Tennessee Valley Authority's 
(TVA) procedures for implementing the National Environmental Policy Act 
(NEPA). TVA has decided to close the Shawnee Fossil Plant (SHF) Special 
Waste Landfill (SWL) and Ash Impoundment 2 and construct a new process 
water basin (PWB). A notice of availability (NOA) of the Final 
Supplemental Environmental Impact Statement (SEIS) for Shawnee Fossil 
Plant Coal Combustion Residual (CCR) Management was published in the 
Federal Register on August 31, 2018. The Final SEIS identified TVA's 
preferred alternative as Alternative C--Closure-in-Place and Regrading 
of the SWL and Ash Impoundment 2 and Construction of a New PWB. TVA's 
decision would achieve the purpose and need to manage the disposal of 
CCR materials on a dry basis and to meet the U.S. Environmental 
Protection Agency's 2015 CCR regulations, as well as the Commonwealth 
of Kentucky's regulations.

FOR FURTHER INFORMATION CONTACT: Ashley Pilakowski, Project 
Environmental Planning, NEPA Specialist, Tennessee Valley Authority, 
400 W. Summit Hill Drive Knoxville, TN 37902; telephone 865-632-2256, 
or by email [email protected]. The Final SEIS, this Record of 
Decision and other project documents are available on TVA's website 
https://www.tva.gov/nepa.

SUPPLEMENTARY INFORMATION: In December 2017, TVA issued the Shawnee 
Fossil Plant Coal Combustion Residual Management Final Environmental 
Impact Statement (Final EIS). The year-long assessment called for 
closing both the SWL and Ash Impoundment 2, as well as building and 
operating a new lined landfill to store dry CCR waste produced by SHF 
in the future. In the Final EIS, TVA identified its preferred 
alternative as Alternative B--Construction of an Onsite CCR Landfill, 
Closure-in-Place of Ash Impoundment 2 with a Reduced Footprint, and 
Closure-in-Place of the SWL. On January 16, 2018, TVA issued a record 
of decision (ROD) to implement construction of the new dry CCR 
landfill, and elected to further consider the alternatives regarding 
the closure of the SWL and Ash Impoundment 2 before making a decision. 
The Final EIS and ROD can be viewed here: https://www.tva.gov/nepa.
    TVA prepared the SEIS to further analyze the alternatives for 
closure of the SWL and Ash Impoundment 2. Additionally, while a 
preliminary location for the PWB was considered in the 2017 Final EIS, 
upon further investigation TVA chose to consider additional alternative 
locations for the PWB in the SEIS.
    The purpose and need of ceasing CCR management operations at both 
the SWL and Ash Impoundment 2 and closing

[[Page 54163]]

them was, and continues to be, to manage the disposal of CCR materials 
on a dry basis and to meet the 2015 CCR regulations, as well as the 
Commonwealth of Kentucky's regulations.

Alternatives Considered

    TVA reevaluated all of the closure alternatives previously 
presented in the Final EIS, including those previously eliminated from 
consideration. The majority of the closure alternatives remained 
eliminated as evaluated in the Final EIS. However, TVA decided to 
reconsider previously eliminated Alternative 4b Closure-in-Place of 
both facilities with general grading within the permit boundary.
    Alternative 4b was initially eliminated because it ``would not 
improve stability.'' This did not mean that Alternative 4b would cause 
instability; rather, it merely did not improve stability. Ash 
Impoundment 2 and the SWL are stable and in full compliance with all 
standards and regulations; thus closure-in-place with general grading 
would not destabilize either facility. Though not described in the 2017 
Final EIS, TVA originally anticipated that Alternative 4b would require 
import of a large quantity of borrow material from an offsite source, 
more material than was potentially available from the Shawnee East 
Site. This caused Alternative 4b to be ranked lower on constructability 
and environmental considerations than other alternatives. Thus, it was 
eliminated from consideration in the Final EIS.
    As TVA continued to review the closure alternatives, TVA identified 
the potential to beneficially reuse CCR from the SWL for grading the 
closed facilities. TVA is currently conducting a demonstration study to 
determine the feasibility of this proposed beneficial reuse of CCR in 
place of borrow material. The beneficial reuse of CCR for closure would 
be subject to Kentucky Department for Environmental Protection 
approval. TVA also identified the potential for the use of a 
ClosureTurf[supreg] or equivalent system as a cap for Ash Impoundment 2 
and SWL. This type of cap system consists of a special engineered turf 
and sand fill and would, therefore, also require less borrow material.
    Additionally, for grading, Alternative 4b would move approximately 
1 million cubic yards of CCR less than Alternative B from the 2017 
Final EIS. This CCR would be dry CCR from the SWL as opposed to wet CCR 
(which would have to be dewatered) from Ash Impoundment 2. Therefore, 
the closure could be completed with greater simplicity, less risk to 
workers, more quickly, and with a lower cost than Alternative B. 
Additionally, because Alternative 4b would involve movement of less 
CCR, air quality impacts of this alternative would be less than the air 
quality impacts of Alternative B in the 2017 Final EIS. Thus, the air 
quality impacts associated with this alternative are less than, and 
therefore bracketed by, the air quality analysis as presented in the 
Final EIS for Alternative B. For all these reasons, TVA found that 
Alternative 4b scored better on constructability, design 
considerations, schedule, and economics than many of the other 
alternatives, including Alternative B in the 2017 Final EIS. Therefore, 
TVA elected to carry Alternative 4b forward for analysis in this SEIS. 
Alternative 4b became the new Alternative C in the SEIS.
    At the same time that Alternative 4b became a higher scoring 
alternative in TVA's reanalysis, TVA determined that Alternative B 
Closure-by-Consolidation in the 2017 Final EIS would require over-
excavation of native materials within the area from which materials are 
removed/consolidated to confirm complete removal of CCR. Approximately 
one foot of over-excavation is assumed to be necessary. This modified 
alternative, which includes over-excavation, is included in this SEIS 
as Alternative B.
    Based on TVA's re-evaluation of the preliminary alternatives 
analysis, as described above, TVA identified two feasible action 
alternatives for future CCR management at SHF, in addition to a No-
Action alternative (Alternative A), which served as a baseline.
    Alternative A--No Action. Under the No Action Alternative, TVA 
would continue current plant operations and not cease operations at its 
SWL and Ash Impoundment 2 (i.e., neither facility would be closed) and 
no closure activities (i.e., installing a cover system to align with 
closure activities) would occur. Additionally, TVA would not construct 
and operate a new PWB. The existing associated impoundments would 
continue to be operated as currently permitted until completion of the 
new CCR landfill. Under the No Action Alternative, SHF's operations 
likely would not comply with the CCR Rule; therefore, this alternative 
would not meet the purpose and need for the proposed actions and is not 
considered viable or reasonable. It does, however, provide a benchmark 
for comparing the environmental impacts of implementation of Action 
Alternatives B and C.
    Alternative B--Closure-in-Place by Reduced Footprint of the Special 
Waste Landfill and Ash Impoundment 2 and Construction of a New Process 
Water Basin. Under Alternative B, TVA would close Ash Impoundment 2 in 
place by removing portions of ash in the northwest corner of the 
impoundment and consolidating this in another portion of the footprint. 
As part of the re-evaluation of alternatives, TVA identified that this 
alternative (formerly Alternative B in the 2017 Final EIS) would also 
require approximately one foot of over-excavation of native materials 
across the area from which materials are removed/consolidated to 
confirm complete removal of CCR. Due to the unknown nature of 
underlying material, over-excavation of significantly more than one 
foot could be required and could potentially include other remediation 
measures which cannot be defined at this time. The SWL and remaining 
Ash Impoundment 2 (including the dredge cell) would be covered and 
capped. This alternative would also include the construction of a lined 
process water basin to receive plant flows and allow for operations to 
cease at Ash Impoundment 2.
    Alternative C--Closure-in-Place and Regrading of the Special Waste 
Landfill and Ash Impoundment 2 and Construction of a New Process Water 
Basin. Most activities would be the same under Alternative C as 
described previously for Alternative B. However, under Alternative C, 
the remaining ash in the northwest corner of Ash Impoundment 2 would 
not be removed and consolidated and no native material would be 
excavated. Instead, both the SWL and Ash Impoundment 2 would be closed-
in-place and regraded with materials redistributed to establish 
appropriate drainage and stability. New storm water outfalls would be 
installed along the perimeter of the facilities to discharge at 
elevations at or above the 100-year flood elevation.

Environmentally Preferable Alternative

    Alternative A (No Action) would result in fewer environmental 
impacts than Alternative B and C. However, Alternative A does not meet 
the purpose and need for the project as continuing current operations 
would not promote the future management of dry CCR at SHF, and would 
not meet the federal regulatory requirements for closing ash 
impoundments including EPA's CCR Rule.
    The environmental impact differences between Alternatives B and C 
are minor. Alternative B may have slightly more beneficial impacts with 
regard to

[[Page 54164]]

groundwater; however, Alternative C would achieve the purpose and need 
of the project and calls for less movement of CCR material and less 
dewatering than Alternative B resulting in greater stability, less 
impacts to air and less risk to worker safety. Consequently, 
Alternative C could also be completed sooner and for a lower cost than 
Alternative B.
    Impacts associated with the construction and operation of a lined 
process water basin to handle plant flows would be the same under 
Alternatives B and C.
    The beneficial impacts to groundwater, which environmentally 
advantage Alternative B over Alternative C, are not substantive enough 
to outweigh the benefits associated with air quality, constructability, 
design considerations, schedule, and economics.
    Under Alternative B and C, there would be minor impacts to land 
use, prime farmlands and soil, surface water, vegetation, wildlife, 
threatened and endangered species, and wetlands. Minor impacts to land 
use include conversion of undeveloped land to industrial use. Borrow 
material may be required for closure activities resulting in minor 
impacts to soils. Alterations of the wet-weather conveyance and storm 
water flow are minor impacts to surface water. Disruption of habitat 
during closure and construction activities and conversion of 
undeveloped land to industrial result in minor impacts to vegetation, 
wildlife, and threatened and endangered species. Minor impacts are 
associated with conversion of 0.26 acre of wetlands. There would be no 
impacts to cultural resources. Impacts under Alternative C would be 
slightly less than those described under Alternative B.

Public Involvement

    On November 1, 2016, TVA published a Notice of Intent in the 
Federal Register announcing that it planned to prepare an EIS to 
address the potential environmental effects associated with ceasing 
operations at both the SWL and Ash Impoundment 2, and constructing, 
operating, and maintaining a new CCR Landfill at SHF. TVA hosted an 
open house scoping meeting on November 15, 2016, at the Robert Cherry 
Civic Center in Paducah, Kentucky. The Draft EIS was issued on June 8, 
2017, and TVA hosted a public meeting on June 22, 2017, at the Robert 
Cherry Civic Center in Paducah, Kentucky. The Final EIS was issued on 
December 8, 2017, and a ROD was signed on January 16, 2018. Public 
comments and TVA's responses are included in Appendix I of the Final 
EIS.
    The NOA for the Draft SEIS was published in the Federal Register on 
May 4, 2018, initiating a 45-day public scoping period, which concluded 
on June 18, 2018. In addition to the notice in the Federal Register, 
TVA sent notification of the availability of the Draft SEIS to local 
and state government entities and federal agencies; published notices 
regarding this effort in local newspapers; issued a press release to 
media; and posted the NOA on the TVA website. TVA accepted comments 
submitted through mail and email. TVA received a total of 19 comments 
from 6 commenters. Summarized comments and TVA's responses are included 
in Appendix E of the Final SEIS.
    The NOA for the Final SEIS was published in the Federal Register on 
August 31, 2018.

Decision

    TVA has decided to close the SWL and Ash Impoundment 2 in place 
with regrading of both facilities and to construct a new PWB 
(Alternative C). These actions would achieve the purpose and need of 
the project and call for less movement of CCR material and less 
dewatering and would result in fewer air quality impacts than 
Alternative B, while also potentially being completed sooner and for a 
lower cost than Alternative B.

Mitigation Measures

    TVA would use appropriate best management practices during all 
phases of impoundment closure and construction and operation of a 
process water basin. Mitigation measures, actions taken to reduce 
adverse impacts associated with the proposed action, include:
     Final drainage for the temporary treatment basin (if 
utilized) would be routed to existing or new discharge outfalls and 
comply with the Kentucky Pollutant Discharge Elimination System permit 
to ensure that no adverse impacts to surface waters would occur. 
Mitigation measures would be identified, as needed, to ensure the 
discharges meet permit limits. This may or may not require a permit 
modification.
     Prior to disturbing wetland and surface water features 
within the process water basin project site, TVA would obtain a Clean 
Water Act Section 404 permit and a Kentucky Division of Water 401 Water 
Quality Certification. Where impacts to these features cannot be 
avoided, TVA would mitigate impacts in accordance with the Section 404 
permit and/or Water Quality Certification as determined in consultation 
with the U.S. Army Corps of Engineers and Kentucky Division of Water.
     Tree removal would occur in winter months (between 
November 15 and March 31) outside breeding season, and would be 
tracked, documented, and reported to the U.S. Fish and Wildlife 
Service.

    Dated: October 22, 2018.
Robert M. Deacy, Sr.,
Senior Vice President, Generation Construction, Projects & Services.
[FR Doc. 2018-23427 Filed 10-25-18; 8:45 am]
 BILLING CODE 8120-08-P