La Prele Dam & Canyon Douglas Wyoming 1910s Vintage RPPC Postcard

Historical Context & Overview

At the turn of the twentieth century, the arid landscapes of the American West underwent a dramatic transformation through ambitious irrigation and water management projects. Among these early feats of civil engineering was the La Prele Dam, situated in a narrow, rocky canyon southwest of Douglas in Converse County, Wyoming. Captured on a rare real photo postcard (RPPC) from the 1910s, this image offers a striking visual record of early western infrastructure integrated into a rugged natural environment.

Engineering in the Wyoming Wilderness

Constructed around 1909 by the North Platte Valley Irrigation Company, La Prele Dam was designed as a hollow reinforced concrete buttress dam—a cutting-edge engineering style pioneered by the Ambursen Hydraulic Construction Company during the early 1900s. The dam was designed to store snowmelt runoff from the Laramie Peak region, creating a reservoir that provided vital water for farming and ranching operations throughout the La Prele Valley.

The photo highlights the sheer scale of the concrete structure wedged firmly between steep, towering limestone cliffs. Water can be seen discharging from the lower spillway outlet near the base, contrasting the stark human-made geometric framework against the chaotic rock formations of La Prele Canyon. Early photographers frequently traveled to remote infrastructure sites like this to document progress, supplying local residents and curious tourists with souvenirs celebrating human mastery over the Western wilderness.

Dating the Real Photo Postcard

Real photo postcards were created by printing photographic negatives directly onto photo-sensitized postcard paper stock. A primary method for establishing the era of an RPPC is examining the stamp box printed on the reverse side. The back of this postcard features the distinctive "AZO" stamp box accompanied by four solid triangles pointing upward in each corner. Photographic historians date this specific AZO marking precisely to the window between 1904 and 1918, confirming that this image reflects the dam shortly after its original construction.

The front lower right margin displays a clean white stencil caption reading "DOUGLAS WYO.", characteristic of commercial or regional photographers who utilized pre-lettered glass plate negatives or film templates to credit local landmarks.

Historical Significance for Collectors

Today, early views of La Prele Dam are particularly sought after by collectors of Wyoming history, Western Americana, and historical engineering memorabilia. Because the dam underwent significant modifications and eventual safety rehabilitations in later decades, contemporary images like this capture the facility in its pristine, original architectural state. Whether preserved for its photographic composition, its postal history, or its historical connection to Wyoming's development, this vintage RPPC remains a compelling artifact from the dawn of the American West's reclamation era.