Violation
Canandaigua 1794 and the Kinzua Dam (1958-1965)
Not yet reviewed by this nation. What follows comes from public records and research. It does not speak for the nation.
Congress flooded part of the Seneca's Allegany lands for Kinzua Dam, though a court called the treaty infringement undisputed; $15 million followed.
- Treaty
- Treaty with the Six Nations (Canandaigua), 7 Stat. 44
- Nations
- Seneca Nation of Indians (Allegany Reservation); Haudenosaunee
- When
- 1958-1965
- Land affected
- About 10,000 acres of the Allegany Reservation, nine communities.
- Acreage
- about 10,000 acres; about 600 people (some sources say more than 600 families)
What happened
In the Treaty of Canandaigua (1794), the United States acknowledged the Seneca's land within set boundaries as theirs. Article III says the United States "will never claim the same, nor disturb the Seneka nation" in its free use and enjoyment of that land.
In October 1956 the Army Corps of Engineers began surveying Seneca land for the Kinzua Dam over the Nation's objections, Environmental Health News reports. The dam was meant to protect Pittsburgh from flooding. The Seneca hired the engineer Arthur E. Morgan in 1957 to propose another plan, and they argued their case in court on the 1794 treaty.
The federal court of appeals ruled against them on November 25, 1958. It wrote that it was "undisputed" that the flooding "will infringe Indian rights acquired by treaty in 1794," and also undisputed that Congress can authorize a taking despite a treaty. The question was whether Congress had shown that intent clearly. The court said Congress knew the Seneca lands would flood and that the Nation would not give them up, and held that Congress had authorized the taking.
Environmental Health News says the Seneca lost nine communities and 10,000 acres of the Allegany Territory, and around 600 people lost their homes. A Bureau of Indian Affairs release says legislation in August 1964 awarded the Senecas $15 million for relocation and rehabilitation after one-third of their Allegany Reservation was taken for the reservoir.
Good to know. The court called the treaty infringement undisputed but held that Congress had power to authorize it anyway. Figures for land and people lost vary by source.
Summarized with AI assistance from 4 sources and checked against their words; not yet reviewed by historians or by the nations. Report an error
What the sources say, and how this was checked
Well supported by the sources below.
the United States will never claim the same, nor disturb the Seneka nation, nor any of the Six Nations
Treaty with the Six Nations, 1794 (Treaty of Canandaigua), OSU Tribal Treaties DatabaseIt is undisputed (1) that the proposed flooding will infringe Indian rights acquired by treaty in 1794
Seneca Nation of Indians v. Brucker, 262 F.2d 27 (D.C. Cir. 1958)They lost nine communities and 10,000 acres of their Allegany Territory to the dam.
The complicated history of the Kinzua Dam and how it changed life for the Seneca people (Environmental Health News)awarded the Senecas $15 million for relocation and rehabilitation after one-third of their Allegany Reservation had been taken for the Kinzua Dam Reservoir
Bill submitted to end federal ties with Seneca Indians (Bureau of Indian Affairs)
Research notes. Treaty breach is stated by the court as undisputed, but Congress's power to override was upheld (no remedy). EHN says the district court ruled in early 1957 in United States v. 21,250 Acres of Land; the appeals opinion cites the January 1957 survey order. 10,000 acres and 600 people come from EHN journalism and the figures differ by source. The Rivers of Steel PDF could not be read and was dropped. The 2026 Army Corps MOU and whether the Senate ratified the 1794 treaty were not verified.
Who is doing the work
Working with these nations
- Oneida Indian Nation Nation government About 18,000 acres in trust (2022 est.), 25,000-acre cap under 2013 agreement
- Rematriation Native-led Indigenous women-led media, education, community advocacy Give on their site Website
- The Nature Conservancy (TNC) Allied land trust Funder/partner in several tribal land returns Website
Land return and Native-led work nearby
- Shinnecock Kelp Farmers Native-led Indigenous kelp farming and Shinnecock Bay restoration Give on their site Website
Native legal and land defense, nationally
- Native American Rights Fund (NARF) Native-led Litigation and legal advocacy for tribal sovereignty, treaty rights, land and resources Give on their site Website
- NDN Collective (LANDBACK Campaign) Native-led LANDBACK campaign (launched 2020; Mount Rushmore closure and return of Black Hills public lands), Indigenous… Give on their site Website
- Indian Land Tenure Foundation (ILTF) Native-led Land recovery and control by tribes and individual Indian landowners Website
- Decolonizing Wealth Project (Indigenous Earth Fund; California Tribal Land Return) Native-led Reparative philanthropy Give on their site Website
Gifts go straight to each organization; this atlas takes nothing. Listing is not endorsement: how organizations are listed.
Connections
These links were matched automatically by name or date and have not yet been reviewed by a person.
Nations named 2
Located in 2
Taken to court in 1
Policy era 1
- Termination1953
Concerns the instrument 1
Sources
- en.wikipedia.org/wiki/Kinzua_Dampointer
- ehn.org/seneca-nation-kinzua-dam-2644943791.htmlunclassified
- law.resource.org/pub/us/case/reporter/F2/262/262.F2d.27.14488.htmllegal text copy
- sninews.org/2026/03/13/beyond-the-betrayal/unclassified
- treaties.okstate.edu/treaties/treaty-with-the-six-nations-1794-0034reference work
The record’s fields
- What happened
- Canandaigua 1794 and the Kinzua Dam (1958-1965) -- Article 3 of the treaty (concluded Nov. 11, 1794; proclaimed Jan. 21, 1795) acknowledged Seneca land and says the United States 'will never claim the same,' for the Seneca's 'free use and enjoyment.' Congress authorized the Allegheny Reservoir/Kinzua Dam under Flood Control Acts of 1936 and 1938 and appropriated for it in 1957. The Seneca challenged it as a violation of the 1794 treaty; the D.C. Circuit (Nov. 25, 1958) held Congress may authorize a taking of treaty-protected land by eminent domain if it clearly shows that intent, and found it had. The Corps broke ground Oct. 22, 1960; the dam was completed in 1965, filling to 1967. About 10,000 acres (nearly a third of the Allegany Reservation) were flooded and about 600 Seneca were relocated; hundreds of graves were exhumed. An alternative design by engineer Arthur E. Morgan was rejected by the Corps. A 1964 act provided relocation and rehabilitation funds.
- Legal aftermath
- No injunction. Compensation by a 1964 act (amount not confirmed this session; commonly reported as $15 million). In March 2026 the Seneca Nation and the Army Corps signed a consultation MOU as the Corps studies dam safety modifications.not yet checked against a source
- Kind
- Violation
- Confidence
- High
- Nation review
- Not yet reviewed by this nation
- Notes
- Some details are disputed
- Some details not yet checked against a source