Chilhowee Dam

Chilhowee Dam
Name	Chilhowee Dam
Location	Blount County, Tennessee, United States
Owner	Alcoa
Operator	Alcoa
Dam type	Gravity
River	Little Tennessee River
Opening	1957
Plant capacity	45 MW

Chilhowee Dam is a hydroelectric facility on the Little Tennessee River in Blount County, Tennessee, owned and operated by Alcoa. The dam forms Chilhowee Lake and is part of a series of dams and reservoirs in the Tennessee Valley that influence navigation, flood control, and power generation. It interacts with regional infrastructure, conservation areas, and historical sites tied to the Tennessee Valley Authority era, the Cherokee Nation, and twentieth-century industrial development.

Location and General Description

Chilhowee Dam is located near Maryville, Tennessee, between the cities of Knoxville, Tennessee and Gatlinburg, Tennessee, within the watershed of the Little Tennessee River and upstream of Fort Loudoun Dam and downstream of Fontana Dam. The structure lies in Blount County, Tennessee adjacent to transportation corridors including U.S. Route 321, the Great Smoky Mountains National Park boundary, and proximate to Interstate 40 and the Tennessee River system. The reservoir, Chilhowee Lake, connects hydrologically with regional reservoirs and riparian corridors used by agencies such as the Tennessee Valley Authority and private utilities including Alcoa. The site is near cultural and historical landmarks associated with the Cherokee people and nineteenth-century frontier settlements like Maryville, Tennessee and Tallassee, Tennessee.

History and Construction

Planning and construction occurred during the mid-twentieth century industrial expansion when aluminum producers and power companies sought hydroelectric capacity; the project was developed by Alcoa and completed in 1957. The dam’s development paralleled projects by the Tennessee Valley Authority, such as Fort Loudoun Dam and Watts Bar Dam, and responded to post‑war demand driven by industries in Alcoa, Tennessee and manufacturing centers in Knoxville, Tennessee and Oak Ridge, Tennessee. Construction involved contractors and engineers influenced by federal and state permitting practices, environmental debates involving National Park Service boundaries near Great Smoky Mountains National Park, and negotiation with the Cherokee Nation (Cherokee) concerning ancestral sites. The facility’s history intersects with regional infrastructure milestones including the expansion of U.S. Route 129 and river management policies shaped by legislators and agencies in Tennessee General Assembly and federal offices.

Design and Specifications

The dam is a concrete gravity structure spanning the Little Tennessee River engineered for hydroelectric generation, flood control, and reservoir regulation. Design features align with standards used at contemporaneous projects like Fontana Dam and Fort Loudoun Dam, with intake structures feeding a powerhouse containing Kaplan/Francis-type turbines and generators manufactured by firms participating in mid-century industrial supply chains. The reservoir footprint required assessments comparable to those conducted for Tellico Dam and other Appalachian projects, involving surveys by state agencies such as the Tennessee Department of Environment and Conservation and federal entities such as the U.S. Army Corps of Engineers. Structural specifications include spillway capacity, penstock arrangements, and control systems integrated with regional grid operations that interconnect with utilities like TVA and transmission infrastructure serving Knoxville, Tennessee and Alcoa, Tennessee.

Operation and Power Generation

Chilhowee’s powerhouse produces peaking and base-load electricity for industrial and municipal customers, coordinated with regional dispatch and reserves used by the Tennessee Valley Authority and private utilities. The plant capacity and operational schedule support aluminum smelting operations historically centered in Alcoa, Tennessee and supply ancillary grid services to markets in East Tennessee, including Knoxville, Tennessee and the Oak Ridge National Laboratory area. Operations consider water management practices like coordinated releases with Fort Loudoun Dam and downstream navigation impacts on the Tennessee River system. The facility’s electrical equipment and control systems have been modernized over time, drawing on technologies and standards from organizations such as the American Society of Mechanical Engineers and the Institute of Electrical and Electronics Engineers.

Environmental and Ecological Impact

The dam and reservoir have altered riverine habitats, fish migrations, and sediment transport in ways similar to impacts documented at Fontana Dam, Tellico Dam, and other Appalachian projects. Changes influenced populations of freshwater species studied by researchers at institutions such as the University of Tennessee, Knoxville and conservation groups including the Tennessee Wildlife Resources Agency and the Sierra Club. The reservoir submerged riparian forests and archaeological sites associated with the Cherokee people, prompting mitigation and cultural resource studies comparable to those undertaken for Nantahala River basin projects. Water quality, dissolved oxygen, and temperature regimes downstream have been monitored in coordination with the Environmental Protection Agency and state agencies to address concerns linked to aquatic invertebrates, sport fish species managed under Tennessee Wildlife Resources Agency regulations, and invasive species noted by the U.S. Fish and Wildlife Service.

Recreation and Public Access

Chilhowee Lake and surrounding lands provide boating, angling, and shoreline recreation promoted by local tourism connected to Great Smoky Mountains National Park, Gatlinburg, Tennessee, and regional attractions such as Dollywood and Cades Cove. Access points and boat ramps are managed in cooperation with county authorities in Blount County, Tennessee and recreational planning entities including the Tennessee Department of Tourist Development and local chambers of commerce like the Maryville/Alcoa Chamber of Commerce. Recreational use is subject to safety advisories from agencies such as the Tennessee Wildlife Resources Agency and operational release schedules coordinated with downstream facilities including Fort Loudoun Dam.

Category:Dams in Tennessee Category:Hydroelectric power stations in Tennessee