Amistad Reservoir
reservoir on the Rio Grande at its confluence with the Devils River in Texas and Mexico
Amistad Reservoir (Spanish: Presa Amistad) is a reservoir on the Rio Grande at its confluence with the Devils River 12 miles (19 km) northwest of Del Rio, Texas. The lake is bounded by Val Verde County on the United States side of the international border and by the state of Coahuila on the Mexican side of the border; the American shoreline forms the Amistad National Recreation Area. The reservoir was formed in 1969 by the construction of Amistad Dam. The dam and lake are managed jointly by the governments of the United States and Mexico through the International Boundary and Water Commission. The name of the dam and lake is the Spanish word for "friendship". The reservoir is also known as Lake Amistad.
Hydrology
Amistad Reservoir is part of the Rio Grande, which forms its principal inflow at its northwestern end. The other major inflow is the Devils River, which enters from the north. The reservoir occupies a series of meanders between the two rivers; its outflow passes through Amistad Dam on the lake's southern side, from which the Rio Grande continues southeastward toward the Gulf of Mexico. Since it is filled by the Rio Grande (and its tributaries, the Rio Conchos and Pecos River), Amistad's drainage basin includes a vast area of West Texas, central New Mexico, southern Colorado, southeastern Chihuahua, and northern Coahuila.
Begin with the source’s own compact description: “Amistad Reservoir” is reservoir on the Rio Grande at its confluence with the Devils River in Texas and Mexico. The dossier treats that line as a proposition to test through Amistad, Reservoir and reservoir, not as a finished interpretation.
Why this record matters
The phrase “reservoir on the Rio Grande at its confluence with the Devils River in Texas and Mexico” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Place names and jurisdictional language are key evidence: both can reveal earlier catalogue descriptions and overlooked record series. The source revision retrieved here is dated Aug 4, 2026. The linked authority identifier is Q1634424. The Library of Congress control number is sh91004173. Authority coordinates are 29.450, -101.058. 3 of 3 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1969.
Modern boundaries and familiar names can conceal earlier jurisdictions or structures that do not align with the present site. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.
- Historic place names
- Jurisdictional context
- Routes into maps and plans
Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.
Three-step research path
- Establish the record: confirm the title “Amistad Reservoir”, its source revision and the description used here.
- Expand the search: follow Amistad Reservoir primary sources, Amistad Reservoir archive and Amistad research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Amistad Reservoir”?
- What physical evidence or contemporary plan supports the description?
- Which authority defined the place, boundary or structure at the relevant date?
Search terms from this dossier
This entry incorporates text from “Amistad Reservoir” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.