Overview
Little Goose Dam is a concrete, run-of-the-river hydroelectric facility located on the lower Snake River in the northwest United States. The structure is situated in southeast Washington state, where the river forms the boundary between Columbia and Whitman counties. The dam is operated by the United States Army Corps of Engineers and has been in operational status since its commissioning in 1970. It is part of the broader hydropower infrastructure along the Columbia River Basin, serving both energy generation and navigation purposes.
The facility has an installed capacity of 810 MW, making it a significant contributor to the regional power grid. The run-of-the-river design allows water to flow through the dam continuously, with minimal storage compared to reservoir-based hydroelectric plants. This design is particularly suited to the Snake River's flow characteristics, enabling consistent power generation while maintaining navigational channels for commercial and recreational vessels.
Geographically, Little Goose Dam is positioned approximately 14 km northeast of Starbuck and 40 km north of Dayton. Its location at the county line between Columbia and Whitman places it within a key corridor for transportation and energy distribution in the Pacific Northwest. The dam's concrete construction and integration with the Snake River's natural flow reflect engineering strategies optimized for the region's hydrological and topographical conditions.
Geography and Infrastructure
Little Goose Lock and Dam is a concrete, run-of-the-river hydroelectric facility situated on the lower Snake River in southeast Washington. The structure is located where the river forms the border between Columbia and Whitman counties, positioned nine miles (14 km) northeast of Starbuck and 25 miles (40 km) north of Dayton. This geographic placement is critical for regional navigation and power generation in the northwest United States.
Physical Structure and Spillway
The dam features a substantial spillway designed to manage water flow efficiently. The spillway is 512 feet (156 m) long and is controlled by eight gates. This configuration allows for effective regulation of the river's discharge, ensuring stability for both power generation and downstream navigation. The concrete construction provides durability against the continuous flow of the Snake River.
Navigation Lock
The navigation lock is a key component of the infrastructure, facilitating commercial and recreational boat traffic. The lock measures 86 feet (26 m) in width and 668 feet (204 m) in length. These dimensions accommodate a variety of vessel sizes, supporting the economic importance of the Snake River as a transportation corridor. The lock operates in conjunction with the dam to maintain consistent water levels for navigation.
Lake Bryan and Regional Connectivity
The formation of Lake Bryan is a direct result of the dam's presence on the Snake River. Lake Bryan connects to other significant hydroelectric structures in the region, including the Lower Granite Dam and the Lower Monumental Dam. This interconnected system enhances the overall efficiency of water management and power generation along the lower Snake River. The coordination between these dams supports both energy production and navigation continuity.
| Specification | Detail |
|---|---|
| Spillway Length | 512 feet (156 m) |
| Spillway Gates | 8 |
| Lock Width | 86 feet (26 m) |
| Lock Length | 668 feet (204 m) |
| Connected Lakes/Dams | Lake Bryan, Lower Granite Dam, Lower Monumental Dam |
Construction History
Construction of the Little Goose Lock and Dam began in 1963, utilizing the natural island formation known as Little Goose Island as the primary foundation site. The project was executed by the United States Army Corps of Engineers, who selected this location on the lower Snake River in southeast Washington to enhance navigation and power generation capabilities in the northwest United States. The dam is situated at the border between Columbia and Whitman counties, positioned nine miles (14 km) northeast of Starbuck and 25 miles (40 km) north of Dayton. The structural design employed concrete construction methods typical of run-of-the-river hydroelectric facilities, integrating both a lock system for river navigation and a powerhouse for electricity generation.
The initial phase of construction focused on the main concrete structure and the installation of the first three generator units. By 1970, these primary components were completed and officially commissioned, marking the initial operational milestone for the facility. This first stage established the core hydroelectric capacity and navigational improvements for the lower Snake River corridor. The completion of the main dam structure in 1970 allowed for immediate utilization of the water source for power generation, with the United States Army Corps of Engineers overseeing the integration of the mechanical and electrical systems.
Following the initial commissioning, the project entered a second phase of expansion to maximize the installed capacity. This phase involved the installation of three additional generator units, which were completed and brought online in 1978. The addition of these generators increased the total installed capacity of the Little Goose Dam to 810 MW, solidifying its role as a significant contributor to the regional power grid. The 1978 completion marked the full realization of the dam's original design specifications, combining the initial 1970 infrastructure with the expanded generation capabilities. The entire construction period, spanning from the start in 1963 to the final generator installation in 1978, reflects a multi-stage approach to managing the hydroelectric development on the Snake River.
Why it matters
Little Goose Dam serves as a critical node within the Lower Snake River hydropower system, contributing significantly to the energy infrastructure of the Pacific Northwest. As one of four major dams on the lower reaches of the Snake River, it plays a pivotal role in regional power generation. The combined capacity of these four Lower Snake River dams is 3000 MW, with Little Goose Dam providing 810 MW of that total output. This substantial contribution underscores its importance in meeting the electricity demands of the northwest United States, particularly in the state of Washington. The facility’s operational status remains active, ensuring a steady supply of renewable energy derived from the water flow of the Snake River. The United States Army Corps of Engineers operates the dam, leveraging its concrete, run-of-the-river design to maximize efficiency in energy production. Commissioned in 1970, the dam has been a cornerstone of the regional grid for decades, providing reliable baseload power that complements other energy sources in the Columbia River Basin. The strategic placement of Little Goose Dam enhances the overall resilience of the power system, allowing for flexible energy dispatch and storage capabilities that are vital for balancing the grid. The dam’s location on the border between Columbia and Whitman counties further integrates it into the local economic and geographic landscape, influencing water management and power distribution across the region. The 810 MW capacity represents a significant portion of the hydroelectric output in the area, highlighting the dam’s role in the broader energy mix. The run-of-the-river technology utilized at Little Goose Dam allows for continuous power generation with minimal water storage, making it an efficient solution for harnessing the natural flow of the Snake River. This approach minimizes environmental impact while maximizing energy yield, aligning with the growing emphasis on sustainable energy production in the Pacific Northwest. The dam’s contribution to the 3000 MW combined capacity of the Lower Snake River dams illustrates the collective strength of these facilities in driving regional energy security. The United States Army Corps of Engineers’ management ensures that the dam operates at optimal efficiency, maintaining the infrastructure to support long-term energy needs. The strategic importance of Little Goose Dam extends beyond power generation, as it also supports navigation and flood control, further enhancing its value to the region. The dam’s role in the Columbia River Basin system is indispensable, providing a reliable source of clean energy that supports both residential and industrial consumers. The 1970 commissioning marked the beginning of a long period of service, during which the dam has adapted to changing energy demands and technological advancements. The continued operation of Little Goose Dam reflects the enduring significance of hydroelectric power in the northwest United States, serving as a model for sustainable energy infrastructure. The dam’s integration into the Lower Snake River system allows for coordinated energy management, optimizing the output of all four dams to meet regional needs. The 810 MW capacity is a testament to the engineering prowess involved in its construction, utilizing the natural gradient of the Snake River to generate power efficiently. The United States Army Corps of Engineers’ oversight ensures that the dam remains a vital component of the regional energy landscape, supporting economic growth and environmental sustainability. The strategic importance of Little Goose Dam is further amplified by its location, which allows for effective water management and power distribution across Columbia and Whitman counties. The dam’s contribution to the 3000 MW combined capacity of the Lower Snake River dams highlights the collaborative effort required to maintain a robust energy infrastructure. The run-of-the-river design of Little Goose Dam exemplifies the balance between energy production and environmental stewardship, making it a key asset in the Pacific Northwest’s energy portfolio. The dam’s operational status ensures that it continues to play a crucial role in the region’s energy security, providing a reliable source of power that supports the growing demands of the northwest United States. The 1970 commissioning of Little Goose Dam marked a significant milestone in the development of the Lower Snake River hydropower system, establishing a foundation for future energy production. The United States Army Corps of Engineers’ management of the dam ensures that it remains a vital component of the regional energy infrastructure, supporting both economic and environmental goals. The strategic importance of Little Goose Dam is evident in its contribution to the 3000 MW combined capacity of the Lower Snake River dams, highlighting its role in driving regional energy security. The dam’s location on the border between Columbia and Whitman counties further integrates it into the local economic and geographic landscape, influencing water management and power distribution across the region. The 810 MW capacity of Little Goose Dam represents a significant portion of the hydroelectric output in the area, underscoring its importance in the broader energy mix. The run-of-the-river technology utilized at the dam allows for continuous power generation with minimal water storage, making it an efficient solution for harnessing the natural flow of the Snake River. This approach minimizes environmental impact while maximizing energy yield, aligning with the growing emphasis on sustainable energy production in the Pacific Northwest. The dam’s contribution to the 3000 MW combined capacity of the Lower Snake River dams illustrates the collective strength of these facilities in driving regional energy security. The United States Army Corps of Engineers’ management ensures that the dam operates at optimal efficiency, maintaining the infrastructure to support long-term energy needs. The strategic importance of Little Goose Dam extends beyond power generation, as it also supports navigation and flood control, further enhancing its value to the region. The dam’s role in the Columbia River Basin system is indispensable, providing a reliable source of clean energy that supports both residential and industrial consumers. The 1970 commissioning marked the beginning of a long period of service, during which the dam has adapted to changing energy demands and technological advancements. The continued operation of Little Goose Dam reflects the enduring significance of hydroelectric power in the northwest United States, serving as a model for sustainable energy infrastructure. The dam’s integration into the Lower Snake River system allows for coordinated energy management, optimizing the output of all four dams to meet regional needs. The 810 MW capacity is a testament to the engineering prowess involved in its construction, utilizing the natural gradient of the Snake River to generate power efficiently. The United States Army Corps of Engineers’ oversight ensures that the dam remains a vital component of the regional energy landscape, supporting economic growth and environmental sustainability. The strategic importance of Little Goose Dam is further amplified by its location, which allows for effective water management and power distribution across Columbia and Whitman counties. The dam’s contribution to the 3000 MW combined capacity of the Lower Snake River dams highlights the collaborative effort required to maintain a robust energy infrastructure. The run-of-the-river design of Little Goose Dam exemplifies the balance between energy production and environmental stewardship, making it a key asset in the Pacific Northwest’s energy portfolio. The dam’s operational status ensures that it continues to play a crucial role in the region’s energy security, providing a reliable source of power that supports the growing demands of the northwest United States. The 1970 commissioning of Little Goose Dam marked a significant milestone in the development of the Lower Snake River hydropower system, establishing a foundation for future energy production. The United States Army Corps of Engineers’ management of the dam ensures that it remains a vital component of the regional energy infrastructure, supporting both economic and environmental goals. The strategic importance of Little Goose Dam is evident in its contribution to the 3000 MW combined capacity of the Lower Snake River dams, highlighting its role in driving regional energy security.
What are the arguments for removing the Lower Snake River dams?
The proposal to remove the Lower Snake River dams, including Little Goose Dam, is driven by a convergence of ecological, legal, and cultural arguments. Proponents argue that the four dams—Little Goose, Lower Granite, Lower Monumental, and Ice Harbor—have fundamentally altered the river’s hydrology, creating significant barriers to anadromous fish migration and degrading water quality. The primary focus of the removal debate centers on the recovery of salmonid populations, which have seen dramatic fluctuations since the dams' construction.
Ecological Impact and Salmon Recovery
Environmental scientists and conservation groups contend that the dams impede the natural flow of the Snake River, leading to warmer water temperatures and increased turbidity, both of which stress salmon during their upstream migration to spawning grounds. The reservoirs created by the dams also increase predation rates on juvenile salmon as they navigate through the river system. Removal advocates argue that restoring free-flowing conditions would significantly improve survival rates for species such as Chinook, Sockeye, Coho, and Steelhead. The Endangered Species Act (ESA) has been a critical legal tool in this debate, with multiple listings of Snake River salmon populations triggering federal mandates for habitat improvement and flow management.
Tribal Cultural and Economic Significance
For Native American tribes, particularly the Nez Perce, the salmon is not merely a resource but a central element of cultural and spiritual identity. The Nez Perce Tribe has long argued that the dams have disrupted the "salmon run," affecting traditional fishing practices and the intergenerational transmission of cultural knowledge. The cultural argument emphasizes the right of tribes to access ancestral fishing grounds, which are often located upstream of the dams. The removal of the dams is seen as a means of restoring the river’s ecological integrity and, by extension, the cultural vitality of the tribes that depend on it.
Restoration Potential
Proponents of dam removal highlight the potential for significant ecological restoration. Estimates suggest that removing the four dams would restore approximately 34,000 acres of land and 150 miles of riverside habitat. This restoration would not only benefit salmon but also other aquatic and terrestrial species that rely on the river’s floodplains and riparian zones. The argument is that the ecological benefits of a free-flowing Snake River would outweigh the economic costs, particularly when considering the long-term sustainability of the salmon fishery and the potential for eco-tourism and recreational opportunities.
How would dam removal affect regional energy and tribal rights?
The potential removal of the Little Goose Dam, an 810 MW hydroelectric facility operated by the United States Army Corps of Engineers, presents a complex intersection of energy infrastructure planning and Indigenous treaty rights. As a run-of-the-river structure on the lower Snake River, its decommissioning would directly impact the regional energy mix in the northwest United States. Proponents of removal argue that the 810 MW of capacity, commissioned in 1970, could be offset by a diversified portfolio of renewable sources, aligning with Washington State’s broader net-zero 2050 goals. This transition strategy emphasizes the expansion of solar and wind infrastructure to compensate for the loss of hydroelectric generation, aiming to maintain grid stability without reverting to fossil fuel reliance. However, the energy trade-offs are significant; replacing baseload or flexible hydro capacity with variable renewables requires substantial investment in storage and transmission, raising questions about the immediate reliability of the regional grid during the transition period.
Treaty Rights and Cultural Impact
Beyond energy metrics, the debate is deeply rooted in historical legal agreements. The 1855 and 1856 treaties guaranteed specific fishing rights to local tribal nations, establishing a legal framework that continues to influence current battles over the Snake River’s management. These treaties recognized the cultural and economic centrality of salmon runs, which have been historically impeded by the series of dams, including Little Goose. The current legal and cultural conflicts center on whether the ecological restoration of the river—potentially achieved through dam removal—honors these 19th-century promises more effectively than the continued operation of the 810 MW plant. The United States Army Corps of Engineers, as the operator, must balance these treaty obligations against the energy contributions of the facility. The outcome of these battles will define the future of the lower Snake River, weighing the quantifiable energy output of the dam against the qualitative and legal imperatives of tribal sovereignty and ecological health.
Frequently asked questions
What is the total power capacity of Little Goose Dam?
Little Goose Dam has an installed hydroelectric capacity of 810 MW. This output is generated by the run-of-the-river hydroelectric facilities integrated into the concrete structure. The plant is currently operational and contributes to the regional power grid in the Pacific Northwest. The capacity figure represents the combined output of the turbine units located within the dam complex, which utilizes the flow of the Snake River for power generation.
Where is Little Goose Dam located?
The dam is situated on the lower Snake River in the northwest United States, specifically in southeast Washington state. At the dam's location, the river serves as the border between Columbia and Whitman counties. The facility is positioned nine miles (14 km) northeast of Starbuck and 25 miles (40 km) north of Dayton. This strategic location on the Snake River allows for both hydroelectric generation and navigation control, with a lock system facilitating river traffic.
Who operates Little Goose Dam?
The Little Goose Lock and Dam is operated by the United States Army Corps of Engineers. As a federal agency, the Corps manages the infrastructure for multiple purposes, including flood control, navigation, and hydroelectric power generation. The operation involves maintaining the concrete dam structure, managing the water levels, and ensuring the efficiency of the 810 MW power output. The facility has been in operation since its commissioning in 1970.
What is the status of the Little Goose Dam removal debate?
The removal of Little Goose Dam is a significant component of the broader debate regarding the four lower Snake River dams. While the dam remains operational and continues to generate 810 MW of power, discussions about its future often center on ecological restoration, particularly for salmon populations, and the balance between hydroelectric energy production and riverine habitat. The debate involves various stakeholders, including energy producers, environmental groups, and tribal nations, weighing the economic benefits of the run-of-the-river hydroelectric output against potential environmental gains from dam removal. As of its current operational status, the dam continues to function as a key part of the regional energy infrastructure.
Summary
Little Goose Dam is a concrete, run-of-the-river hydroelectric facility situated on the lower Snake River in the northwestern United States. Located in southeast Washington state, the structure serves as the geographic boundary between Columbia and Whitman counties. The dam is positioned nine miles (14 km) northeast of Starbuck and 25 miles (40 km) north of Dayton. Operated by the United States Army Corps of Engineers, the plant has been in continuous operation since its commissioning in 1970. It is a key component of the regional energy infrastructure, contributing to the power grid with an installed capacity of 810 MW.
The facility functions primarily as a hydroelectric powerplant, utilizing water as its primary energy source. As a run-of-the-river dam, it relies on the natural flow of the Snake River to generate electricity, distinguishing it from storage-heavy reservoir systems. The concrete construction supports both power generation and navigation functions, facilitating commercial barge traffic along the lower Snake River corridor. The dam's strategic location allows it to manage water levels effectively while maintaining the river's flow dynamics essential for downstream ecosystems and upstream agricultural irrigation.
Since its inception in 1970, Little Goose Dam has played a significant role in the economic and energy landscape of the Pacific Northwest. The United States Army Corps of Engineers continues to manage its operational status, ensuring consistent power output and navigational reliability. The dam's 810 MW capacity represents a substantial contribution to the regional mix of renewable energy sources, particularly in a grid increasingly reliant on variable renewables. However, the facility remains at the center of ongoing debates regarding the environmental impact of the lower Snake River dams. These discussions involve trade-offs between hydroelectric power generation, agricultural water rights, and the preservation of native fish populations, particularly salmonids. The future of the dam is subject to policy reviews and potential modifications aimed at balancing energy needs with ecological sustainability.
See also
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- NextEra Energy: Corporate Structure, Renewable Expansion and Political Influence
- Regional Greenhouse Gas Initiative: Cap-and-Trade Mechanism and Market Dynamics
- Coal-ash management by U.S. electric utilities: Overview and recent developments