Group of six real photo postcards documenting early dam construction activity in the Portola / Big Meadows region of California, with multiple views showing the landscape, worksite, and equipment during the initial phases of development. The photographs include a river channel cut through a forested canyon, timbered work camps with scattered buildings among tall pines, elevated views labeled “Looking from Tower Sept. 1913,” and several close views of heavy construction apparatus, including tall derrick structures used in excavation and material handling. One image shows a graded roadway climbing a steep slope with wagons or early motorized hauling equipment transporting loads along what is identified as a “speedwell track,” while another depicts the cleared riverbed prior to major construction.

The versos provide useful contemporary context in manuscript. One card notes, “showing the river bed and dam site before any work was done in summer of 1912,” further describing the surrounding meadow and projecting the scale of the completed reservoir. Another reads, “showing the two pile drivers, the big one driving steel sheeting,” referencing specific construction techniques and equipment in use. Additional messages mention camp life, including “showing dining room and sleeping tents in camp,” and a brief note describing ongoing work conditions. Several cards are signed from Big Meadows, California, and dated June 25, 1912, situating the group firmly within the early construction phase.

All cards are printed “POST CARD / CORRESPONDENCE HERE / FOR ADDRESS ONLY,” with “VELOX” stamp boxes visible on at least one example, consistent with early 20th century photographic postcard stock. The handwriting appears to be by a single correspondent, suggesting the group was retained together from its original source.

A cohesive and well-documented set illustrating dam construction in northern California, combining landscape, industrial process, and firsthand written commentary from the period, with particular strength in its early date references and identification of specific equipment and site conditions.