Definition
Colorado is one of the fifty states of the United States, admitted to the Union on August 1, 1876, as the thirty-eighth state. Known historically as the Centennial State for its admission during the centennial year of American independence, Colorado occupies a constitutional position as a sovereign state within the federal system, with its own constitution, legislature, courts, and body of statutory and common law.
In legal research, "Colorado" most commonly appears as a jurisdictional designator — identifying which state's law governs a dispute, which court system has authority, or which legislative enactment applies. It also appears in the name of a significant federal abstention doctrine: the Colorado River doctrine, which governs when federal courts may defer to parallel state court proceedings.
Why It Matters in Research
Researchers encounter Colorado in two distinct contexts that require different navigation strategies.
First, as a jurisdiction: Colorado law has its own distinct body of civil procedure, criminal law, property law, and constitutional provisions. Researchers should not assume that doctrines from neighboring states — even those with similar legal traditions — translate directly. Colorado adopted its current constitution in 1876, and its courts have a continuous body of case law from statehood forward. Legislative codification is found in the Colorado Revised Statutes (C.R.S.). When researching pre-statehood territorial law (1861–1876), sources shift to territorial legislative acts and federal enabling legislation.
Second, as the named term in the Colorado River abstention doctrine: The U.S. Supreme Court's decision in Colorado River Water Conservation District v. United States established a narrow doctrine permitting federal courts to stay or dismiss proceedings in deference to concurrent state litigation under exceptional circumstances. This doctrine is distinct from the better-known Younger and Pullman abstention doctrines and applies under a different standard. Researchers conflating these doctrines will misread both the federal case law and strategic litigation considerations. The Law Mind Encyclopedia entry at civpro_212 addresses all four major abstention doctrines together and is the recommended starting point for this research.
A third research context arises in water law. The Colorado River Compact (1922) and associated interstate water allocation agreements are foundational documents in western water law, and "Colorado" appears throughout that body of law as both a geographic and legal reference. Researchers in natural resources or environmental law should be alert to this usage.
Historical Dictionary Support
Bouvier's entry is brief and primarily historical-geographic in character, recording Colorado's admission date (August 1, 1876), the territorial origins of the land through the Louisiana Purchase (France, 1803) and the Treaty of Guadalupe Hidalgo (Mexico, 1848), and the enabling act approved March 8, 1875. Bouvier cross-references California and Louisiana, suggesting readers trace the parallel statehood narratives for comparative context.
The entry reflects Bouvier's general practice of treating state entries as short historical notices rather than substantive legal analyses. It provides no treatment of Colorado's constitution, its court structure, or its distinctive legal doctrines — all of which are essential for modern legal research. Researchers relying solely on Bouvier for Colorado law will find the entry useful only for establishing basic chronological and territorial facts about statehood.
Jurisdictional Note
Colorado operates a unified state court system with district courts as the primary trial courts, a Court of Appeals as the intermediate appellate body, and the Colorado Supreme Court as the court of last resort on state law questions. Federal courts applying Colorado law under diversity jurisdiction are bound by Colorado Supreme Court precedent. For the Colorado River abstention doctrine specifically, the doctrine applies in federal court regardless of which state's substantive law underlies the dispute.
Encyclopedia Cross-Reference
Abstention Doctrines — Pullman, Younger, Burford, and Colorado River (Law Mind Civil Procedure & Evidence Encyclopedia, civpro_212)