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Mohave II – Colorado River Steamship
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.
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
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.
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.
Gold Basin, Arizona – Mohave County Ghost Town
Gold Basin, Arizona (Mohave County) is a historic gold mining district and geographic basin in northwestern Arizona, located in the southern White Hills west of Hualapai Wash (also spelled Wallapai), south of Lake Mead and west of the Grand Wash Cliffs. It lies roughly 50–60 miles north of Kingman and about 70 miles southeast of Las Vegas, Nevada. The area is part of the Basin and Range province and is closely associated with the adjacent Lost Basin mining district to the northeast across Hualapai Valley.
Early Discovery and Lode Mining (1870s–1900s)
Gold-bearing quartz veins were first discovered in the early 1870s. Development was slow due to extreme remoteness, scarce water and fuel, and limited transportation. Before 1900 the district produced an estimated $50,000–$100,000 in gold (period values), most of it from the Eldorado (or El Dorado) Mine, the earliest significant producer.
A small boom occurred around 1880. By 1881 two stamp mills were operating; one was a cooperative five-stamp mill at Grass Springs (near the later Diamond Bar Ranch headquarters), and another was built near Red Willow Spring. Most of the important early mines—Eldorado, Excelsior, Golden Rule, Jim Blaine, Never-Get-Left, O.K., and Cyclopic—had been located and developed by 1883. These produced free-milling gold-quartz ores averaging 0.5–3.0 ounces of gold per ton.
Around 1886 a third stamp mill was built along Hualapai Wash and became the nucleus of a small settlement called Gold Basin (later also known simply as Basin). Gold-bearing veins in the neighboring Lost Basin district were discovered about the same time. The Gold Basin mill (also called the O.K. or Burnt Mill) became the region’s central processing facility. Water had to be piped roughly 10 km from tunnels at Patterson’s Well because local wells hit only dry alluvium. The mill burned in 1893, was rebuilt in 1896 with 10 stamps plus a cyanide plant, and burned again in 1906; it was not rebuilt after the second fire.
A post office operated at Gold Basin from September 20, 1890, to January 4, 1894. It reopened under the name Basin on March 17, 1904, and closed permanently on June 15, 1907, after which postal service shifted to the Cyclopic Mine (which had its own post office until 1917). The settlement consisted of shanties and tents for miners and mill workers and never grew into a substantial town because of the harsh conditions and distance from supply lines.
Production and Later Lode Activity
Recorded production from the Gold Basin and Lost Basin districts combined (1901–1942) totaled about 13,508 ounces of gold and 6,857 ounces of silver (plus minor copper and lead), valued at roughly $359,000 (98% from gold). Most lode production is credited to Gold Basin mines. Minimum total historic gold production for the Gold Basin district alone is estimated at about 15,000 ounces, predominantly from lode sources.
Activity continued on a small scale into the 1910s–1920s, then largely paused until the early 1930s. A few mines reopened between 1932 and 1942 before wartime restrictions and later dormancy set in. Ore occurs in veins within Precambrian granite and schist; gold is associated with lead or copper minerals (pyrite, chalcopyrite, galena, molybdenite, wolframite) and, in oxidized zones, limonite, malachite, and other secondary minerals. Mineralization is linked to Late Cretaceous two-mica magmatism and structural features, including a regional low-angle detachment surface.
Key historic mines included the Eldorado, O.K., Cyclopic (which became a population center after 1905 with its own cyanide mill), Excelsior, and others. Modern exploration (including work by companies such as Gold Basin Resources) has focused on oxide gold potential at deposits such as Cyclopic and Stealth, with historical drilling and permitting for open-pit heap-leach concepts that were not advanced due to gold prices at the time.
Placer Mining Boom (1930s onward)
Placer gold was noted as early as 1909, but systematic placer mining did not begin until 1931–1932, roughly 60 years after the lode discoveries. In May 1932 W.E. Dunlop located significant placers; by August about 100 men were working the area with dry washers. Numbers dropped to around 43 by mid-1933. The richest and most active placers were on the east flank of the Lost Basin Range (especially the King Tut placers and nearby claims such as Queen Tut, Golden Nugget, and Lone Jack) and on the detrital fan in Gold Basin itself (including the Searles placer).
Gold ranges from fine dust to coarse nuggets (up to several ounces; a 4-ounce nugget valued at $140 was recovered near King Tut in 1941). Gravels are typically thin (1–3 feet or less) and rest on caliche-cemented material. Most work has been small-scale with portable dry washers; a few operations used power equipment and dry-concentrating plants. Activity has continued intermittently at a small scale into modern times, making the district popular with recreational prospectors using metal detectors and dry washers.
Geology and Landscape
The district lies in rugged desert terrain of rocky hills, dry washes, and alluvial fans. Lode gold occurs in quartz veins (and some episyenitic pipes) hosted by Proterozoic rocks, with emplacement ages primarily Late Cretaceous (and some older resetting). Placer gold is derived from erosion of these veins. The area is arid, with limited water historically a major constraint on development.
Meteorite Strewn Field
In addition to gold, Gold Basin is the site of one of the largest and best-documented meteorite strewn fields in North America. Discovered in 1995 by retired University of Arizona geology professor Jim Kriegh while metal-detecting for gold, the field has yielded thousands of specimens (over 4,450 reported with a total mass exceeding 168 kg in early studies) of an L4 ordinary chondrite (Gold Basin meteorite) across an area of roughly 130–225 km². The terrestrial age is approximately 15,000 ± 600 years (Late Pleistocene). Additional meteorites of other types have also been found in the area. The arid climate has preserved the material well, and fragments are still occasionally recovered by prospectors.
Legacy and Present Day
Gold Basin never became a major boomtown. Its isolation, water scarcity, and relatively modest overall production limited growth. Remains include the ruins of the Burnt Mill (O.K./Gold Basin Mill), stone foundations and concrete slabs of the old mining camp, and a small abandoned cemetery (Gold Basin/Basin/Burnt Mill Ranch Cemetery) with a few wooden markers. The area is primarily public (BLM) land with active mining claims; recreational gold prospecting and meteorite hunting continue. Access is via dirt roads off Pierce Ferry Road (from U.S. Highway 93 north of Kingman). The district remains of interest for both historic mining heritage and modern small-scale exploration and recreation.
Primary sources for this history include U.S. Geological Survey reports (especially Professional Paper 1361 and Bulletin 1355 on placer deposits), Western Mining History compilations of USGS data, and local historical accounts of the settlement, mill, and cemetery.
Franconia, Arizona – Mohave County Ghost Town
Franconia is a former railroad siding and unincorporated populated place in Mohave County, northwestern Arizona. It sits at approximately 34°44′22″N 114°16′06″W, at an elevation of about 1,102 feet (336 m) above sea level, in the Mojave Desert near the California border. It is located along the historic route of the Atchison, Topeka and Santa Fe Railway (originally the Atlantic and Pacific Railroad), near present-day Interstate 40 at Exit 13. Nearby communities include Yucca (northeast), Powell and Topock (west), and Lake Havasu City (about 18 miles south). Today it is essentially a ghost town/siding with minimal or no permanent structures remaining, known mainly for its railroad past and a major meteorite recovery area.
Indigenous and Early Regional Context
The broader Mohave County area was traditionally inhabited by the Mojave (Mohave) people and other Indigenous groups along the Colorado River and surrounding desert. Spanish exploration reached the region in the early 1600s (Juan de Oñate in 1604). American exploration, military presence (Fort Mojave established 1859), mining, and settlement intensified after the U.S. acquired the territory (Mexican Cession 1848 and Gadsden Purchase 1854). Mohave County was created in 1864 as one of Arizona Territory’s original four counties.
Railroad Origins and Naming (1880s)
Franconia’s existence is tied entirely to the railroad. The Atlantic and Pacific Railroad (A&P), chartered by Congress in 1866 with substantial land grants, built westward across northern Arizona along roughly the 35th parallel under Santa Fe influence via the 1879–1880 Tripartite Agreement. Construction reached the Needles, California area by 1883, completing a key transcontinental link.
Franconia developed as a flag station/siding and section house stop on this line (later operated by the Santa Fe Pacific and then the Atchison, Topeka and Santa Fe). It was named by F.W. Smith, a railroad general superintendent born in 1857 in California, for his son Frank. By May 1887 the railroad had two small wooden houses there (valued at $100 each); the company contested Mohave County tax assessments on these and similar buildings, citing federal exemptions for railroad operating improvements.
Section houses were typical two-room structures housing a foreman and crew responsible for maintaining a 10–30 mile stretch of track. Workers sometimes lived in converted railroad cars parked on sidings. Earliest published mentions of Franconia appear around 1895. Concrete pads, foundation remnants, rusted cans, glass, and debris north of the tracks mark the former site.
Early 20th-Century Life and Population
The 1900 U.S. Census listed only three residents at Franconia: section foreman J.R. Carroll (age 26, English-born, naturalized after 13 years in the U.S.) and two Japanese railroad laborers, Inni (age 25) and Ymoanoto (age 19). All were single, literate, and English-speaking. A letter on file at the Mohave Museum of History and Arts notes a birth at Franconia on October 3, 1908, to the family of a section foreman, indicating occasional family presence. The settlement remained tiny and transient, focused solely on track maintenance.
Major Incidents
1901 Head-On Collision (November 20, 1901)
At approximately 5:12 a.m., about 1–2 miles west of Franconia on a sharp curve of the then single-track line, Santa Fe westbound Flyer No. 3 and eastbound Flyer No. 4 collided head-on at high speed (estimates of 40–70 mph). The eastbound train was pulled by two oil-burning locomotives; one exploded, spraying burning oil and igniting wreckage. Three engines, both dining cars, one Pullman, and two composite cars were destroyed.
Casualties included multiple train crew members (engineers, firemen, a baggage master/barber, conductors, waiters, and others) killed or fatally injured, plus some unidentified tramps/hobos whose remains were found later. Three passengers and about 14 trainmen were injured. Bodies and survivors were taken to Needles, California. The crash was attributed to dispatcher error and a timing discrepancy of roughly six minutes involving train orders at Franconia and Yucca. One surviving engineer, L. Holmes, later successfully sued the railroad (Santa Fe Pacific R. Co. v. Holmes, U.S. Supreme Court 1906) and was awarded $9,000. Contemporary accounts described it as one of the worst wrecks in Santa Fe history to that point.
1903 Accident
In June 1903, Santa Fe engineer George Payne was crushed and killed while oiling his engine on a side track at Franconia when it unexpectedly moved. He left a wife and two children.
1945 Side Collision (August 21, 1945)
A westbound passenger train (Second 23) was leaving the Franconia siding onto the main track when it was struck by a following westbound train (Third 53) traveling about 65 mph. Visibility was limited by a curve and embankment. The Interstate Commerce Commission investigated; the accident injured 49 passengers, 5 Pullman employees, and 3 train-service employees. No fatalities were reported in the official summary.
Later History and Decline
Section houses were still in use into the mid-20th century; some were given away for removal around 1935. As railroad operations modernized (double-tracking, mechanized maintenance, dieselization), the need for remote section crews diminished. Franconia faded into a derelict siding. Ghost town guides note that little or nothing remains of the original buildings. The area lies near remnants of the National Old Trails Road (a precursor route to U.S. 66).
Modern Significance: Franconia Meteorite Strewn Field
Since 2002 the surrounding desert has become one of Earth’s most productive dense collection areas for meteorites, often called the “Franconia strewn field” (roughly elliptical, about 5 × 16 km). Hundreds of specimens (at least 380 by some counts) have been recovered. Scientific study shows multiple distinct falls over roughly 0–20 thousand years rather than a single event, including H5 chondrites (the type specimen named Franconia, found by John Wolfe on October 31, 2002), other H-chondrites and breccias, and L6 chondrites. The dry desert climate and sparse vegetation aid recovery and preservation.
A soil series is also named Franconia (very deep, somewhat excessively drained soils on floodplains and alluvial fans in northwestern Arizona).
Cemetery and Legacy
A small historic cemetery/grave area is associated with Franconia and has been documented by the American Pioneer & Cemetery Research Project. It reflects the transient, hazardous lives of railroad workers and others in the remote desert.
Franconia never developed into a substantial town. Its history is that of a classic Western railroad section stop—briefly inhabited by maintenance crews (including immigrant laborers), marked by industrial accidents, and ultimately abandoned as technology changed—leaving behind only place-name, scattered ruins, railroad infrastructure, and an unexpectedly rich scientific legacy in meteorite research. It remains accessible via dirt roads off I-40 for those interested in railroad history, desert exploration, or meteorite hunting (with appropriate safety precautions for remote desert conditions, unmarked mines, and extreme heat).
Cochan – Colorado River Steamship
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.
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.
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.