Category: Mines

Potholes, California, is a former gold mining camp and short-lived settlement in Imperial County on the west bank of the Colorado River, near the present-day site of Laguna Dam (about 15–18 miles upriver from Fort Yuma / Yuma, Arizona, and roughly 4 miles northeast of Bard). It sits in the southeastern Chocolate Mountains at the edge of what is now the All-American Canal system. The site is a ghost town with little remaining surface evidence of its mining or steamboat eras; a cemetery lies about a mile south along the riverbank.

Early Spanish Mining and Loss of Knowledge

Placer gold deposits at the “Pot Holes” (natural depressions in the desert gravels) were likely worked by Spanish miners associated with Mission San Pedro y San Pablo de Bicuñer, established in 1781 near the site. Knowledge of the diggings was largely lost after the Yuma (Quechan) uprising of 1781, in which the missionaries and settlers were killed. The location remained obscure for decades.

Rediscovery and 19th-Century Placer Mining

In early 1859, placer gold was rediscovered about 15 miles above Fort Yuma on the California side of the Colorado. Contemporary reports (including from the Daily Alta California) described paying claims: one operation reportedly yielded $200 per day for a short period, with others producing $10–$16 per day. Miners carried dirt to the river to wash in cradles; better results were expected if water could be brought to the diggings for sluicing. Mining continued intermittently through the later 19th century, largely by Hispanic prospectors familiar with dry-washing techniques suited to the arid environment. Estimates suggest hundreds of Mexican miners worked the district at peak times. A failed dredging attempt on the river near the site in 1900–1901 recovered little gold because the particles were too fine for the equipment. Total historical production from the district has been estimated in the range of around $2 million (period values).

There has been some little excitement in this part of the, country, caused by the discovery of new gold fields on the Rio Colorado, some fifteen miles above Fort Yuma, on the California side. I have just returned from the diggings, and find, after a careful examination of three days, that gold exists there in paying quantities, for many miles on both sides of the river. While at the newly discovered diggings, a considerable quantity of the oro has been taken out, considering the short time- they have been worked. From the claim of Messrs. Crandell & Co., $200 per day have been dug daily for the past six days. The manner of working is the same at at Jila city, heretofore described. The earth must be carried on the back a distance of one mile, and washed in a cradle. It is said that the total amount of the gold taken from Crandell & Co ‘s claim is about $4,000. – They have now constructed a cart-road from the mine to the river, and hereafter will be able to work at better advantage. Several other claims in the vicinity are paying from $10 to $16 per day; but most of the claims — for a good manner have been located — will not pay more than $2 per day to the hand, by the present process of working. If water could be obtained and sluice* used, from $40 to $100 per day might be washed. [We had news of these diggings in oar San Diego correspondence, published this morning, and the corroborating testimony of .our Fort Yuma correspondent is of much value, as confirmatory of the reports from San Diego. — Eds. Alta.]

I think, however, that the Gila mines are much more valuable, or will yield much more gold than these new diggings on the Colorado. Th« former have the advantage of being easily supplied with water, works for that purpose being now in progress.

Mining operations resumed again in 1859 with the rediscovery of gold. Placier mining operations proved successful in the 19th century. A steamship landing was established to ferry people and supplies to the location 15 miles up river from Yuma, Arizona.

The town of Potholes California was established during the building of the All American Canal and Laguna Dam.

Daily Alta California, Volume XI, Number 42, 12 February 1859

Role as a Colorado River Steamboat Landing and Supply Point

From 1852 to 1909, shallow-draft paddle-wheel steamboats were the primary commercial transportation on the lower Colorado River, moving people, military supplies, mining equipment, food, and ore between the Gulf of California (and later ocean connections) and upriver settlements and mines as far as the Virgin River area. George A. Johnson & Company (later the Colorado Steam Navigation Company) dominated the trade after early experiments with vessels such as the Uncle Sam (1852) and General Jesup.

Potholes appears on historical lists of steamboat landings beginning in 1859, located roughly 18 miles (29 km) above Fort Yuma. A landing was established specifically to deliver people and supplies to the newly active gold diggings. It served the local mining camp and the surrounding area (including the nearby Laguna placers across the river in Arizona Territory that opened around 1860). Steamboats provided a far cheaper and more practical alternative to overland wagon freight across the desert. Landings like Potholes functioned as local hubs: boats tied up overnight (night navigation was too hazardous on the shifting, shallow, sandbar-filled river), took on wood fuel cut by local Indigenous workers, discharged cargo for the mines and camps, and loaded any ore or goods for the return trip. This river network supported the broader mining boom of the 1860s along the lower Colorado and enabled isolated desert camps to obtain provisions that would otherwise have been prohibitively expensive.

Steamboat traffic declined after railroads reached the region (notably the Southern Pacific’s arrival at Yuma in the late 1870s) and effectively ended with the completion of Laguna Dam in 1909, which blocked further upriver navigation.

Early 20th-Century Construction Camp and Post Office

A town named Potholes was re-established (or formalized) during construction of Laguna Dam (completed 1909) and related work on the All-American Canal system, which diverted Colorado River water for Imperial Valley irrigation. A post office operated there from 1905 to 1909 and again from 1920 to 1922. The settlement was also served by a short Southern Pacific Laguna Branch railroad spur. Once the major construction projects finished and steamboat service ceased, the community faded. The canal and dam works altered the landscape, and much of the earlier mining and mission-era evidence was affected by flooding or later infrastructure.

Legacy

Potholes illustrates the layered history of the lower Colorado River corridor: early Spanish exploration and mining, mid-19th-century gold rushes sustained by steamboat logistics, and early-20th-century water infrastructure that transformed the desert into irrigated farmland. Today the site is largely unmarked and accessible mainly via local roads near Laguna Dam; remnant activity has been limited to occasional recreational prospecting. Its brief but documented role as a steamboat landing underscores how river transport once linked remote mining camps to distant supply centers, enabling settlement and extraction in an otherwise isolated frontier.

Town Summary

Name	Potholes, California
Location	Imperial County, California
Latitude, Longitude	32.8289329, -114.5046713
Elevation	160 feet
GNIS	247730
Post Office	1905 – 1909, 1920 – 1922

Potholes California Map

References

• Daily Alta California, Volume XI, Number 42, 12 February 1859
• Wikipedia – Potholes
• Steamboats on the Colorado River 1852-1916