Category: Destination4x4

Colorado II – Colorado River Steamship

Posted on by

The Colorado II was a stern-wheel paddle steamer (sternwheeler) that operated on the Colorado River from 1862 until it was dismantled in 1882. It was the second vessel of that name and the fifth steamboat overall on the lower Colorado River. It played a key role in freight and passenger transport supporting military posts, mining, and settlement in the desert Southwest during the peak of river steamboating.

Colorado II in a tidal dry dock in the shipyard above Port Isabel, Sonora - MacMullen, Jerry, Paddle-Wheel Days in California, Stanford University Press, 1944
Colorado II in a tidal dry dock in the shipyard above Port Isabel, Sonora – MacMullen, Jerry, Paddle-Wheel Days in California, Stanford University Press, 1944

Background and Construction

Steamboat service on the Colorado River began in the early 1850s to supply Fort Yuma (near present-day Yuma, Arizona) and other points upriver, as overland transport across the desert was difficult and expensive. George A. Johnson & Company dominated the trade. The original Colorado (often called Colorado I), launched in late 1855, was a 120-foot sternwheeler that could carry about 60–70 tons on a shallow draft of under two feet. It used an 80-horsepower engine and was captained at times by Isaac Polhamus (later known as the “Dean of the Colorado River”).

By 1862 the original Colorado was worn out. Its hull was dismantled in April 1862 at Arizona City (Yuma). The engine and boiler were removed and reused. Shipbuilder John G. North (a well-known California steamboat builder) constructed a new, larger hull in San Francisco. The parts were shipped to the Colorado River and assembled/launched at Arizona City under the guns of Fort Yuma, due to fears of Confederate raiders during the Civil War. The new vessel—Colorado II—entered service around December 1862 (some sources note May or later in the year for full operations).

Specifications

  • Type: Stern-wheel paddle steamer (sternwheeler)
  • Tonnage: 179 tons
  • Length: 145 feet
  • Beam (width): 29 feet
  • Draft: Approximately 16 inches (very shallow, suited to the river’s sandbars and variable water levels)
  • Engine: 80 hp steam engine reused from Colorado I
  • Cargo capacity: Around 70 tons (some accounts note higher freight capacity in practice; one source cites capacity for 179 tons of freight, aligning with displacement)
  • Builder: John G. North (hull); machinery from the prior vessel
  • Owners: George A. Johnson & Company, later the Colorado Steam Navigation Company (C.S.N.Co., reorganized 1869)

These shallow-draft design features were essential for navigating the lower Colorado’s shifting channels, sandbars, and seasonal low water.

Role on the Colorado River

Colorado II operated primarily on the lower Colorado River, from the river mouth/delta area (near Port Isabel, Sonora, Mexico, on the Gulf of California) northward past Arizona City/Yuma, to landings serving mining districts, military posts (including Fort Mohave), and settlements in present-day Arizona, California, and Nevada. It carried freight (supplies, mining machinery, ore, wool, agricultural goods), passengers, and often towed barges to increase capacity.

It was part of Johnson’s fleet that held a near-monopoly after absorbing rivals in the 1860s. Key captains included Stephen Thorne. The vessel worked alongside others such as the Cocopah (I and later II), Mohave, Nina Tilden, and barges. Woodyards (often staffed by local Cocopah people) supplied fuel along the route. Trips supported the growth of mining (e.g., in areas like Eldorado Canyon) and military logistics. By the late 1860s–1870s the company (reorganized as C.S.N.Co.) ran multiple steamers and handled thousands of tons of freight and hundreds of passengers annually. Colorado II is documented in period photos, including at Fort Yuma landings and in a tidal dry dock at Port Isabel.

Competition from rival lines (e.g., in the mid-1860s) was short-lived. The arrival of the Southern Pacific Railroad at Yuma in 1877 (with a bridge soon after) sharply reduced the need for long-haul river transport, as rail took over east-west traffic. The steamboat company was sold to Southern Pacific interests. Remaining boats, including Colorado II, continued for a time on residual upper-river and local service.

Ultimate Fate

Colorado II remained in service until 1882, when it was dismantled (sources consistently list 1882; some note August). This was typical for aging Colorado River steamboats once machinery wore out or traffic declined—hulls were often broken up, and usable parts reused or the vessels beached. It outlasted several contemporaries (e.g., Cocopah II was dismantled around 1881). The broader steamboat era on the lower Colorado effectively ended with the construction of Laguna Dam (completed around 1909), which blocked navigation, though limited operations continued a few years longer with smaller vessels.

Colorado II exemplifies the practical, shallow-draft sternwheelers that opened the desert Southwest to reliable waterborne commerce for roughly three decades before railroads and dams rendered them obsolete. Primary details come from historical compilations of Colorado River steamboats, including Wikipedia summaries drawing on period accounts and works such as those referencing MacMullen’s Paddle-Wheel Days in California.

Cyclopic, Arizona – Mohave County Ghost Town

Posted on by
Mohave County, Arizona Ghost Towns
Mohave County, Arizona Ghost Towns

Cyclopic, Arizona is a former mining village and ghost town in Mohave County, located in the Gold Basin Mining District (eastern White Hills) near the head of Cyclopic Wash. It sits at an elevation of approximately 4,340–4,360 feet (about 1,320–1,329 m), roughly 5 miles northwest of Dolan Springs and accessible via dirt roads off U.S. Route 93 / Pierce Ferry Road. Coordinates are approximately 35°46′58″N 114°14′46″W.

The settlement existed primarily to house workers for the nearby Cyclopic Mine (also known historically as the Indian Secret Mine and other names). It never developed into a large town and is today a quiet site with limited ruins.

Early Mining in the Gold Basin District

Gold-bearing quartz veins in the broader Gold Basin–Lost Basin area were discovered in the early 1870s. A modest boom occurred around 1880 as prospectors targeted free-milling ores. Early mills operated in the district (including stamp mills near Grass Springs and Red Willow Spring). Development was limited by remoteness, scarce water and fuel, and the isolation of the White Hills.

The Cyclopic Mine itself was discovered in 1880 and ranks among the oldest and most productive in the Gold Basin District. It is a polymetallic deposit (primarily gold and silver, with lead, copper, and molybdenum) associated with quartz veins and breccias in Cretaceous granite and related to a mid-Miocene detachment fault. Mineralization includes gold-bearing quartz veins of Cretaceous age and later Tertiary ore linked to the detachment structure—the only mine in the district with significant late-stage Tertiary ore spatially related to the main detachment fault. Workings consisted mainly of shallow inclined shafts, drifts, crosscuts, and (later) open pits, most less than 30 feet deep initially.

Establishment of the Village and Peak Activity

By the early 1900s the Cyclopic area became a focus of activity. In 1901 the property was associated with Robbins & Walker; in 1904 it was acquired by the Cyclopic Gold Mining Company. In 1905 the company built a 40-ton-per-day cyanide mill along Cyclopic Wash below the mine. A post office opened the same year to serve the growing worker community. After the nearby Gold Basin (“Basin”) post office closed in 1907, Cyclopic became the district’s main postal hub.

The village housed miners and support workers in a remote desert setting. Daily life centered on mining labor under harsh conditions (cold desert climate with mild winters and hot summers). Water was a persistent challenge in the region.

Mining continued intermittently. Significant activity occurred from about 1919 to 1926 under the Gold Basin Exploration Company (which remodeled the mill); a new ore body was found in 1926 and capacity was increased. Later operators included Manta de Oro Mines (from 1936). Production episodes also took place in the early 1930s and 1936–1940/1942, including open-pit work in the final phase. Historical estimates credit the mine with over 4,000 ounces of gold from the 1890s through the late 1930s (with district-wide recorded figures higher when including other mines). Ore was typically low- to moderate-grade (examples include values around $7–8 per ton in gold in some periods).

Decline and Abandonment

The post office closed permanently in 1917 (sources note it was re-established in 1914 during a period of renewed activity before final closure). This marked the effective end of the village as a residential community. Broader factors included depleted shallow ores, high transportation costs, fluctuating metal prices (especially after World War I), the earlier burning of the Gold Basin mill (1906), and the remote location.

Mining at the Cyclopic and elsewhere in the district continued sporadically into the early 1940s but did not revive the settlement. The district saw little activity after about 1942. Later ownership (e.g., Saratoga Mines and others in the late 1970s) involved assessment and some residual interest, with resource estimates in later decades (such as tens of thousands of metric tons of low-grade ore), but no major modern production or resettlement occurred.

Present Day

Cyclopic is a classic Arizona ghost town. Surviving features include mine tailings, metal tanks (including a historic water tank), and building foundations. Access is by 2WD dirt roads (best in cooler months). It lies on or near public/BLM-influenced land in a sparsely populated part of Mohave County and is of interest mainly to history enthusiasts, rockhounds, and ghost-town explorers.

In summary, Cyclopic’s brief history mirrors many small Western mining camps: rapid growth tied to a single productive mine and mill in the early 20th century, followed by decline when economics and logistics no longer supported a permanent community. Its significance lies in its role within the Gold Basin District and as one of the more productive early gold-silver operations in the White Hills of northwestern Arizona.

Mohave II – Colorado River Steamship

Posted on by

Mohave II (also referred to as Mohave) was a stern-wheel steamboat and the largest vessel ever to operate on the Colorado River. It was the first and only double-smokestack (twin-stack) steamboat on the river, giving it a distinctive silhouette that resembled the larger, more ornate Mississippi River packets in outward appearance, though its interior was utilitarian and geared toward practical freight and passenger work rather than luxury.

Mohave II at Yuma, Arizona, with Sunday school group embarked, 1876 - Unknown author - MacMullen, Jerry, Paddle-Wheel Days in California, Stanford University Press, 1944
Mohave II at Yuma, Arizona, with Sunday school group embarked, 1876 – Unknown author – MacMullen, Jerry, Paddle-Wheel Days in California, Stanford University Press, 1944

Physical Description and Design

Built by San Francisco shipbuilder Patrick Henry Tiernan (the same builder of the earlier Gila), the Mohave II was constructed in sections in San Francisco, disassembled, shipped to the Colorado River Delta, and reassembled at the shipyard in Port Isabel, Sonora, Mexico (at the mouth of the Colorado River). It was launched in May 1876.

Key specifications included:

  • Displacement/tonnage: 188 tons.
  • Length: 149.5 feet.
  • Beam (width): 31.5 feet.
  • Draft: Approximately 1 foot (12 inches) of water—shallower than the Gila by about half a foot—which allowed it to navigate farther into shallow sloughs, sandbars, and low-water conditions than most other boats on the river.
  • Hull depth: Roughly 3–3.1 feet.
  • Propulsion: Stern-wheel paddle design, optimized for the Colorado’s shallow, shifting, sandbar-filled waters and strong currents.
  • Distinctive features: Twin smokestacks (the only such configuration on the river), contributing to its “palatial” or “magnificent” advertising image for excursions.

Despite its imposing external look, it was primarily a working vessel designed to tow barges and carry substantial cargo while also accommodating passengers for both commercial and recreational trips. Its shallow draft made it especially versatile for the challenging lower Colorado River environment.

History of Usage

The Mohave II was built by the Colorado Steam Navigation Company (C.S.N.C., formerly George A. Johnson & Company) specifically to replace the worn-out Mohave I (a 1864 stern-wheeler that had been dismantled in 1875 at Port Isabel, with its machinery later reused elsewhere). It entered service in 1876 and operated for about a quarter-century until around 1900.

It served as a key freight, passenger, and towboat during the peak and gradual decline of Colorado River steamboating. Primary roles included:

  • Hauling ore, mining machinery, supplies, wool, and other goods to support mining booms (including later gold discoveries in areas like the Searchlight and Goldroad districts) and agricultural trade in the American Southwest.
  • Transporting troops, merchants, settlers, and tourists.
  • Towing barges (sometimes multiple) for heavier loads.
  • Supporting railroad construction, notably assisting with the wooden railroad bridge at Needles in the early 1880s by towing barges equipped with pile drivers.
  • Special excursion and pleasure trips, including Sunday school outings (famously photographed at Yuma in 1876), May Day and Fourth of July picnics, trips to islands or points of interest, and even longer voyages into the Gulf of California (one noted 10-day pleasure trip in 1895 under Captain Jack Mellon).

Notable captains and operators associated with it included Isaac Polhamus (and family members), Joseph H. Godfrey (nephew of Polhamus, who took it to its farthest recorded point), and John Alexander “Jack” Mellon. Under Godfrey in 1881, it reached Rioville (at the mouth of the Virgin River in Nevada), the practical highest point of steam navigation on the lower Colorado during high water—extending roughly 450–600 miles upstream depending on conditions and measurement from the mouth or Yuma.

The boat helped sustain the C.S.N.C.’s dominance on the river even as railroads began encroaching in the late 1870s–1880s (the company was eventually linked to or sold interests involving the Southern Pacific). Business fluctuated with mining activity; a late-1890s revival kept the Mohave II and Gila busy enough that a new barge (Enterprise) was needed. By the late 1890s, however, rail competition and aging vessels reduced operations. In early 1900, as the company shifted resources (reusing the Gila’s engine for the new Cochan to serve Searchlight mines), the Mohave II was stripped of its machinery, run into Jaeger’s Slough near Yuma, and left to decay (dismantled around January 1900). Broader Colorado River steamboating effectively ended with the completion of Laguna Dam (about 14 miles above Yuma) in 1909, which blocked upstream navigation.

Ports of Call and Routes

The Mohave II operated primarily on the lower Colorado River, with Yuma (Arizona Territory/Arizona; formerly Arizona City, near Fort Yuma) as the principal hub and supply center after the railroad reached it. Standard commercial runs covered roughly 450 miles or more upstream during suitable water levels, connecting the Gulf of California/delta region to upriver mining, military, and settlement points. Wood yards and landings along the route supplied fuel (often cut by local Cocopah and other Indigenous workers).

Key ports of call and landings associated with its service and the broader C.S.N.C. fleet (which it shared routes with) included, from downstream to upstream (approximate historical distances and activity periods where noted):

  • Delta/estuary area (Sonora and Baja California, Mexico): Port Isabel (shipyard and major anchorage/port until the late 1870s), Robinson’s Landing, Port Famine, Lerdo Landing, Gridiron, Ogden’s Landing, and others for cargo transfer from ocean vessels (to minimize Mexican customs issues) and wood.
  • Lower river near Yuma: Jaeger City/Colorado City area, Fort Yuma/Yuma (core hub for passengers, freight, military supply, and excursions).
  • Mid-river Arizona/California points: Castle Dome Landing, Picacho, Ehrenberg (important mining/freight transfer), La Paz area, Parker’s Landing/Camp Colorado, Liverpool Landing, and others serving ranches, mines, and ferries.
  • Upper mid-river: Needles (California; grew in importance with the railroad and bridge construction in the 1880s, where Mohave II assisted), Fort Mohave (Arizona Territory; major military post and regular stop), Hardyville (Arizona Territory; practical head of navigation at low water, near present-day Bullhead City area; key ferry and freight point), El Dorado Canyon (Nevada; silver mining support), and Mohave City.
  • Farthest reaches (high water): Rioville (Nevada, mouth of the Virgin River; reached in 1881), with occasional service toward Callville or related Mormon supply points earlier in the steamboat era.

Routes typically ran between the Gulf/delta or Yuma and Hardyville/Fort Mohave as the practical limit under normal conditions, with extensions farther north in high water. Downstream trips were much faster than upstream ones due to the current. The boat also made special recreational runs from Yuma or Needles to nearby points of interest or into the Gulf.

Overall, the Mohave II exemplified the height of Colorado River steamboating technology and commerce in the late 19th century—bridging the pre-railroad era of isolated desert Southwest settlement, mining, and military supply with the transition to rail dominance—while providing both essential transport and occasional community recreation on one of the West’s most difficult rivers.

Mohave I – Colorado River Steamships

Posted on by

Mohave I (often simply called Mohave) was a stern-wheel steamboat that operated on the Colorado River from 1864 to 1875. It was the first vessel of that name on the river and an important workhorse in the mid-19th-century Colorado River trade, carrying freight, supplies, and passengers to support mining, military posts, and settlements in the Arizona Territory and beyond.

The steamboat Mohave departing the landing in El Dorado Canyon.
The steamboat Mohave departing the landing in El Dorado Canyon.

Description and Specifications

Mohave I was a wooden-hulled stern-wheeler built for the shallow, shifting, sandbar-filled waters of the lower Colorado River. Key dimensions and characteristics included:

  • Tonnage: 193 tons.
  • Length: 135 feet.
  • Beam: 28–29 feet.
  • Hull depth: Approximately 4 feet.
  • Draft: Relatively shallow for its size, allowing it to navigate low-water conditions better than deeper-draft vessels (though exact loaded/light drafts vary slightly in sources).
  • Propulsion: Stern-wheel paddle, powered by steam engines (specific horsepower not consistently recorded in primary summaries, but the vessel demonstrated strong power for the era).
  • Cargo capacity: Up to about 225 tons when running alone; it commonly towed one or two barges and could handle combined loads in the range of 100+ tons of cargo on barges in addition to its own capacity.

It was constructed in sections by the noted San Francisco shipbuilder John G. North at his shipyard. The sections were transported south and assembled/launched in the Colorado River estuary (near the mouth of the river in what is now the Sonora/Baja California border area of Mexico) in late May 1864. Ownership was under George A. Johnson & Company (later reorganized as the Colorado Steam Navigation Company around 1869).

Like other Colorado River stern-wheelers of the period, it was a utilitarian working boat rather than a luxurious passenger steamer. It featured a basic superstructure suited to freight and limited passenger service in a harsh desert environment, with wood-fired boilers that required frequent refueling at wood-yards along the river (often staffed by Cocopah laborers cutting cottonwood and mesquite). The river’s extreme tides near the mouth, tidal bore, strong seasonal currents (especially during spring rise), sandbars, and low-water periods made navigation demanding; boats typically did not run at night.

History of Construction and Usage

George A. Johnson & Company had dominated Colorado River steamboating since the early 1850s, supplying Fort Yuma and later expanding upriver as mining booms developed. By late 1863, however, a surge in mining activity (gold and silver districts) created a freight backlog. High rates, shortages, and limited capacity led to discontent among upriver miners and merchants. This prompted competition from an “opposition line,” including the arrival of the stern-wheeler Esmerelda (Union Line) in 1864.

Johnson responded by ordering Mohave I. After launch in May 1864, it quickly entered service hauling freight from the Gulf of California/estuary area northward. From 1865 onward it regularly towed barges. A standout demonstration of its power and capacity occurred on a May 27–June 6, 1866 voyage under Captain Isaac Polhamus: it covered approximately 365 miles upriver from Yuma to El Dorado Canyon in a record 10 days and 2 hours while carrying 225 tons of cargo. Strong spring currents slowed progress for four of those days (only 41 miles covered in that stretch), forcing Polhamus to transfer cargo from the two barges it was towing onto the steamer itself and leave the barges behind temporarily.

Throughout its career Mohave I supported:

  • Military logistics (supplying posts such as Fort Yuma and Fort Mohave).
  • Mining operations (delivering machinery, provisions, and supplies; returning with ore).
  • General commerce and settlement growth along the river corridor during the post-Civil War expansion of the Southwest.

It required periodic maintenance (hull work, caulking, etc.) at facilities in Yuma and Port Isabel. By the mid-1870s the boat was worn out. Railroads were beginning to compete effectively with river transport. In 1875 Mohave I was hauled out at Port Isabel, dismantled, and its machinery shipped to San Francisco to equip the Sacramento River stern-wheeler Onward (launched 1877; operated until 1909). It was succeeded on the Colorado by the larger Mohave II (launched 1876), the only double-smokestack steamboat on the river.

Ports of Call and Routes

Mohave I operated primarily on the lower Colorado River route, roughly 150–500+ miles depending on water levels and destination, from the river mouth/estuary northward. Cargo typically arrived by ocean-going schooners or steamships at the Gulf of California and was transshipped at or near Port Isabel (or earlier anchorages such as Robinson’s Landing) onto river steamers to avoid or manage Mexican customs issues and tidal hazards.

Principal ports and landings (approximate river miles above the mouth or relative to key points; distances varied with the shifting channel):

  • Port Isabel (Sonora, Mexico) and nearby estuary landings/anchorages (Robinson’s Landing, etc.): Southern terminus, shipyard, and transshipment point. Active as a key facility especially from the mid-1860s.
  • Fort Yuma / Arizona City (later Yuma), Arizona Territory / California: Major hub roughly 150 miles upriver. Military post, commercial center, and frequent stop.
  • Intermediate wood-yards and landings below and above Yuma (examples include Port Famine, Gridiron, Ogden’s Landing, Pedrick’s, and later sites such as Castle Dome Landing).
  • La Paz / Ehrenberg area (around 125–130+ miles above Yuma): Important mining and commercial points during the 1860s La Paz boom; freight rates for supplies and returning ore were significant.
  • Aubrey City / Bill Williams River area.
  • Fort Mohave / Hardyville / Mohave City area (roughly 300–310 miles from the mouth; Hardyville often served as low-water head of navigation for a period): Military post and transfer point for northern traffic.
  • El Dorado Canyon (southern Nevada area, ~365 miles from Yuma in the noted 1866 run): Mining district destination for freight and supplies.
  • Higher points such as Callville (Mormon settlement) were reached by Mohave I and other boats in high water periods in the mid-1860s, though not always regularly.

Wood-yards spaced roughly a day’s travel apart allowed overnight refueling. Downstream trips were much faster than upstream ones due to the current. The overall corridor stretched roughly 500 miles from the Gulf to upper mining camps when conditions permitted.

Mohave I helped open and sustain commerce in a remote desert region before railroads (notably the Southern Pacific reaching Yuma in 1877) gradually displaced river steamers as the primary freight mode. Its career illustrates both the ingenuity required to navigate the Colorado and the economic importance of steamboating to the early development of the Arizona Territory and adjacent areas.

Cochan – Colorado River Steamship

Posted on by

The Cochan was the last stern-wheel steamboat operated by the Colorado Steam Navigation Company (CSNC) on the Colorado River, running from late 1899/1900 until about 1909–1910. Named for the Quechan (Yuma) people, it marked the end of commercial steam navigation on the lower Colorado after nearly six decades of steamboat activity that began in 1852.

View showing steamboat Cochan on the Colorado River near Yuma, Arizona in 1900 - U.S. National Archives and Records Administration
View showing steamboat Cochan on the Colorado River near Yuma, Arizona in 1900 – U.S. National Archives and Records Administration

Origins and Construction

By 1899, CSNC owners Isaac Polhamus and Jack Mellon faced aging vessels and renewed competition from newer boats (including the St. Vallier). Their remaining steamers, the Mohave II (about 23 years old) and the Gila (launched 1873 and already more than 25 years in service), had worn hulls requiring heavy maintenance. The Gila was selected because it retained better engines.

In late 1899, the Gila’s machinery was refurbished and installed in a rebuilt (or heavily reconstructed) hull at the shipyard in Yuma, Arizona, at a cost of roughly $25,000 (some accounts cite about $27,000). The vessel was launched on November 8, 1899, and renamed Cochan. It was two tons lighter and 14 feet shorter than the Gila.

Key specifications:

  • Displacement: 234 tons
  • Length: 135 feet
  • Beam: 31 feet
  • Draft: 11 inches unloaded; less than 2 feet (about 22 inches) when loaded with cargo
  • Cargo capacity: up to 125 tons of freight
  • Propulsion: stern paddlewheel driven by the refurbished steam engines from the Gila

The Cochan was a classic Western-river sternwheeler optimized for the Colorado’s difficult conditions—shifting sandbars, snags, swift currents, seasonal low water, and abrasive sand. Design priorities emphasized extreme shallow draft, a relatively flat or lightly built wooden hull reinforced against grounding and impacts, and reliable (rather than high-speed) power for towing barges. Sternwheel configuration aided maneuverability in confined or shallow channels and allowed techniques such as using the wheel to help dig through bars. These principles continued the adaptations that Colorado River boats had developed since the 1850s, prioritizing flotation and cargo-carrying ability in minimal water over ocean-style seaworthiness or deep-draft efficiency.

In 1900 the company also built a new barge, the Silas J. Lewis (about 150 feet long and 32 feet in beam), for the Cochan to tow, while scrapping older barges.

Operations and Role in Trade

The Cochan entered service in January 1900, carrying freight to mining districts such as the Quartette and Searchlight mines in Nevada and competing directly with the St. Vallier (and later the Searchlight). It operated primarily on the lower Colorado between Yuma, Arizona, and points upstream toward Needles, California, and mining areas, supporting the final phase of the region’s mining boom with supplies, equipment, ore, and passengers.

Steamboats like the Cochan remained important for expanding and sustaining trade along the Colorado long after the Southern Pacific Railroad reached Yuma in 1877. They provided the most economical means of moving bulk goods across the desert Southwest until rail lines fully displaced them. The Cochan and its contemporaries hauled freight for mines, helped supply irrigation and reclamation projects (including work related to the Imperial Valley and the temporary diversion that formed the Salton Sea), and maintained local commerce on stretches of the river still poorly served by rail. By the early 1900s, however, additional rail bridges (including the Arizona and California Railroad at Parker in 1905) and the completion of Laguna Dam in 1909 (about 14 miles above Yuma) progressively eliminated upstream navigation. By the end of 1905 most boats, including the Cochan, had been withdrawn to the Yuma area.

Steamer "Cochan" on Colorado River at Needles. The Otis Marston Colorado River Collection. The Huntington Library, San Marino, California.
Steamer “Cochan” on Colorado River at Needles. The Otis Marston Colorado River Collection The Huntington Library, San Marino, California.

End of Service

Just before Laguna Dam closed the river to steam navigation, the CSNC sold its remaining boats, including the Cochan, to the U.S. Reclamation Service in 1909. The Service had no need for the vessel, and it was dismantled in the spring of 1910 at Yuma. This marked the practical end of the steamboat era on the lower Colorado, which had facilitated thousands of tons of annual commerce since the 1850s.

Historical Significance

The Cochan embodied the final refinement of shallow-draft sternwheeler design for one of North America’s most challenging rivers. By recycling proven engines into a lighter, shorter hull with exceptional draft performance, its builders extended the economic life of river transport during a period of intensifying competition from railroads and dams. It supported late mining activity, early 20th-century reclamation efforts, and residual trade until infrastructure changes rendered steamboats obsolete. As the last major sternwheeler of the Colorado Steam Navigation Company, the Cochan closes a chapter in the transportation history of the American Southwest that had opened the desert interior to sustained commercial development.