Construction Log for Existing Well_.pdf

This document is a geological well log and drilling record dated August 11, 1937, documenting subsurface conditions at a specific well location. The log presents a stratigraphic profile with depth measurements in feet, identifying geological layers encountered during drilling operations.

The well encountered multiple distinct geological formations from surface to approximately 780 feet depth. Key layers documented include rhyolite and layers of lava and thin beds of cinders and red ash (depth 80 feet), solid lava (145-165 feet), beacon lava and lava ash, gray hard lava (365-443 feet), red clay and lava cinders, red basalt lava and red cinders, red lava (570 feet), dark gray sand, and gray lava with sand and some ash (680 feet). The well reached a water level in the well at 640 feet (noted as 1/1/40 in 1940), with water level measurements recorded at various depths. Handwritten annotations throughout the document indicate drilling progress notes, including specific measurements, pump pressures (noted in psi), and operational dates. Additional drilling activities were recorded on June 19, 1927 and June 24, 1927, with pump specifications documented at 30 ppm pressure. A December 20, 1926 notation references replacing the state-issued pump with an existing brine casing. The log includes technical details such as casing specifications and measurements at multiple depths, supporting geological and hydrogeological assessment of the well formation.