CACrown ArchivesThe cinema collection
Menu
Research dossier · Places & Architecture

Cochan (sternwheeler)

Colorado River steamboat

Architectural plans, a scale model, maps and brass measuring instruments
Places and architectureInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionOct 22, 2024
Entity authorityQ20711086 ↗
Source-derived summary

Cochan, (Quechan) last of the stern-wheel steamboats built for the Colorado Steam Navigation Company (CSNC). It ran on the Colorado River between 1900 and 1909.

History

In 1899 Issac Polhamus and Jack Mellon owners of the CSNC had to choose one of their remaining steamboats to rebuild to keep up with the competition. The old boats were wearing out in competition with newer boats. Both the 23-year-old Mohave II and the Gila, with 35 years on the Colorado River, had worn hulls only kept going with a lot of maintenance. The Gila despite its age had better engines, and so it was chosen.

In late 1899 the Gila's machinery was refurbished and its hull rebuilt for $25,000 in the shipyard at Yuma, Arizona. Launched on November 8, 1899, it was renamed the Cochan it was two tons lighter and 14 feet shorter than the Gila. Cochan displaced 234 tons, was 135 feet long, 31 feet wide beam, and drew only 11 inches of water unloaded. It could carry 125 tons of freight, drawing less than two feet of water.

Editorial summary

The public source identifies “Cochan (sternwheeler)” as colorado River steamboat. This brief keeps that definition visible, then builds a research path around Cochan, sternwheeler and Colorado.

Editorial reviewA strong orientation record where physical form, institutional use and historical geography need to be read together. The current lead gives the account dated anchors—1900, 1909, 1899—that can be checked directly. The selected authority fields contribute no independent date. Its value is orientation rather than verdict, with Cochan, sternwheeler and Colorado providing the first useful test.
Editorial analysis

Why this record matters

A short description can identify a subject without explaining its stakes. For “Cochan (sternwheeler)”, the useful work is to connect “colorado River steamboat” to the records capable of establishing context and consequence.

Evidence profile

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 Oct 22, 2024. The linked authority identifier is Q20711086. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1900, 1909 and 1899.

Critical limits

A single description cannot reconcile every naming convention, rebuilding phase or administrative transfer associated with a place. 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.

Best used for
  • Historic place names
  • Jurisdictional context
  • Routes into maps and plans
Verify next

Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.

Three-step research path

  1. Establish the record: confirm the title “Cochan (sternwheeler)”, its source revision and the description used here.
  2. Expand the search: follow Cochan (sternwheeler) primary sources, Cochan (sternwheeler) archive and Cochan research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “Cochan (sternwheeler)”?
  2. Which authority defined the place, boundary or structure at the relevant date?
  3. Which earlier names or jurisdictions may reveal additional records?
Subject index

Search terms from this dossier

Source & attribution

This entry incorporates text from “Cochan (sternwheeler)” 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.