Record of Decision
The TVA Board of Directors has issued a decision on a new operating policy for the Tennessee River and reservoir system. TVA and the cooperating agencies (the U.S. Army Corps of Engineers and U.S. Fish and Wildlife Service) have prepared this Record of Decision to document the details of the decision and the rationale for the decision.
Record of Decision (PDF, 552 kb)
See the Managing River System Flows web page for background information on river system operations.
Final Environmental Impact Statement
TVA and the cooperating
agencies prepared this final Environmental Impact Statement
(FEIS) to document the environmental, social, and economic impacts
associated with reservoir operations policy alternatives evaluated
in the Reservoir
Operations Study (ROS). The purpose of the
ROS was to enable TVA to determine
whether changes in its reservoir operations policy would produce
greater overall public value.
text of the final EIS is available in the following documents. (Note: these
files are in PDF format and require Adobe
Acrobat Reader, version 5.0 or above. Click Adobe link for
Summary (428 kb)
Contains an overview of the study and alternative
of Contents (172 kb)
Lists the chapters, subsections, appendices, figures, tables, acronyms,
and metric conversion chart.
1: Introduction (464 kb)
The purpose and need for the study, a history of policy
changes, and the results of the scoping and DEIS public review process.
2: The Water Control System (692 kb)
The seasonal patterns of rainfall and runoff and the
specific components of the water control system.
3: Reservoir Operations Policy Alternatives (376 kb)
The process and development of alternative operating
policies, comparison of the alternatives, and description of the Preferred Alternative.
Chapter 4: Description
of the Affected Environment
Introduction to Affected Environment (396 kb)
An overview of the 24 sections (listed below)
that describe existing conditions of the environmental resource areas
evaluated in the ROS.
Air Resources (580 kb)
Air quality-related pollutant values and national ambient air quality standards.
Climate (180 kb)
Greenhouse gases and emissions associated with global warming.
Water Quality (252 kb)
Water quality conditions, including temperature, dissolved oxygen, and algae.
Water Supply (196 kb)
The effects on municipal and industrial water supplies.
Groundwater Resources (220
Changes in groundwater levels and effects on groundwater resources.
Aquatic Resources (292
Biodiversity, sport fisheries, and commercial fisheries.
Wetland location, type, and function.
Aquatic Plants (280
Effects on invasive and noninvasive aquatic plants.
Terrestrial Ecology (156
Species in lowland and upland plant communities and wildlife communities.
Invasive Terrestrial and Aquatic Animals and Terrestrial Plants (108
Population abundance and spread of species.
Vector Control (104 kb)
Population abundance of permanent pool and floodwater species.
Threatened and Endangered Species (136 kb)
Occurrence patterns of threatened and endangered species.
Managed Areas and Ecologically Significant Site (132 kb)
Integrity of 447 managed areas and 105 ecologically significant sites.
Land Use (148 kb)
Rate of residential shoreline development and resultant change in land use.
Shoreline Erosion (136 kb)
Rate of erosion of reservoir and tailwater shorelines.
Prime Farmland (284 kb)
Farmland conversion to nonfarm uses.
Cultural Resources (136 kb)
Integrity of historic structures and archaeological sites.
Visual Resources (1.5
Scenic attractiveness, scenic integrity, and landscape visibility.
Dam Safety (108
Reservoir-triggered seismicity, dam stability, and leakage from dams.
Cargo transport and channel depth.
Flood Control (192
Magnitude of flood flows, potential flood damage, and flood recovery.
Power (176 kb)
Power generation dispatch, cost of power, and power reliability system.
Public, private, and commercial recreation use.
Social and Economic Resources (224 kb)
Population, employment, and economic activity measures.
Chapter 5: Environmental
Consequences of the Alternatives
Introduction to Environmental Consequences (80 kb)
An overview of the 24 sections (listed below) that describe
the potential impacts of the preliminary alternatives and the Preferred Alternative
on each of the affected environmental resource areas.
Air Resources (188 kb)
Changes in air pollutant emissions.
Climate (112 kb)
Changes in greenhouse gas emissions.
Water Quality (260 kb)
Changes in the timing and amount of water flow through the system.
Water Supply (144 kb)
Changes in supply for municipal or industrial use.
Groundwater Resources (104 kb)
Effects on surface water and groundwater resources.
Aquatic Resources (316 kb)
Changes in biodiversity, sport fisheries, and commercial fisheries.
Impacts on wetland locations, types, and functions.
Aquatic Plants (116 kb)
Changes in plant or invasive species coverage and plant communities.
Terrestrial Ecology (132 kb)
Impacts to upland and lowland plant communities and associated wildlife.
Invasive Plants and Animals (104
Changes to habitat suitability for species abundance and colonization.
Vector Control (108 kb)
Changes in breeding success of mosquitoes in permanent and temporary pools.
Threatened and Endangered Species (192
Occurrence of protected species within one-mile buffers of waterbodies.
Managed and Ecologically Significant Sites (104 kb)
Changes in boundaries or existence of sites.
Land Use (104
Changes in rates of residential shoreline development.
Shoreline Erosion (132
Impacts on erosion in reservoir and tailwater riverine sections.
Prime Farmland (96
Farmland conversion, primarily from residential and commercial development.
Cultural Resources (128 kb)
Impacts on historic properties from erosion, streamflow, and wave action.
Visual Resources (124
Changes in scenic attractiveness, landscape visibility, and scenic integrity.
Dam Safety (88 kb)
Impacts to structural stability of dams and appurtenant structures.
Navigation (112 kb)
Changes in depth of navigation channels.
Flood Control (396 kb)
Existing flood risk condition, peak discharge, and potential flood damage.
Power (152 kb)
Cost of hydropower and non-hydropower production and power system reliability.
Recreation (200 kb)
Changes in recreational use of reservoirs and below-dam areas.
Social and Economic Resources (236 kb)
Five pathways and four variables measuring total economic effects.
6: Cumulative Impacts (188 kb)
Effects of the proposed action when considered together
with other past, present, and reasonably foreseeable future actions.
7: Potential Mitigation Measures (160 kb)
TVA’s responsibility to identify a range of mitigation
actions and the programmatic framework within which mitigation measures could
8 - List of Preparers (152 kb)
Comprehensive list of TVA staff and consultants who prepared the FEIS.
9 - Distribution List (128 kb)
List of those in the Valley Congressional delegation, federal and state agencies,
public libraries, and those individuals and organizations who requested
and will receive a copy of the Executive Summary and FEIS.
10 - Supporting Information (252 kb)
Literature cited, glossary of terms, and index.
A: Water Control System Description Tables (180 kb)
Tables describing reservoir operating characteristics, water quality targets,
water supply projections, fill and drawdown dates, and hydro modernization
B: Reservoir operations Study Preliminary Alternatives (176
Descriptions of preliminary alternatives formulated from the scoping process.
C: Model Description and Results (5 mb)
Descriptions of models used for weekly scheduling, energy cost, water quality,
flood control, and economics.
D: Additional Information for Resource Areas
Tables and figures for 10 resource areas.
E: Prime Farmland Technical Report (1.1 mb)
Report prepared for TVA by Normandeau Associates, Inc. for preparation of the
Appendix F: Response to Comments on the DEIS
TVA responses to comments from federal and state agencies and members of the public received during the DEIS public review process.
Appendix G: Results of Consultation performed Under Section 7 of the Endangered Species Act (1.2 mb)
Appendix H: Results of Consultation Performed Under the National Historic Preservation Act (288 kb)
The ROS Final EIS and Record of Decision contained several mitigation measures to reduce the impacts of the selected alternative. Various monitoring studies are an important component of these mitigation measures. Results of some of the monitoring studies are available here.
Wetland Monitoring Summary Report (PDF, 373 kb)
This report summarizes the wetland monitoring conducted during 2005.