Statement of Significance (as of designation - December 22, 1977):
Discovered in the 1930s, excavations at the site in Yellow House Canyon have revealed a stratified sequence of human habitation spanning 11,000-12,000 years and providing evidence for occupation during Clovis, Folsom, Plainview, Late Paleo-Indian, Archaic, Ceramic, and historic periods.

Condition:
The condition of the Lubbock Lake Landmark is satisfactory at this time. Plans to deal with the short-term threats of invasive or overpopulated species have been formulated and implemented. The Landmark faces potential long-term threats of water erosion and urban sprawl. These conditions are being monitored.

Since the last biennial report, the staff of the Lubbock Lake Landmark has addressed the short-term threats posed by four species, the overpopulation of the native black-tailed prairie dog and native mesquite, and the invasive Chinese elm and salt cedar. Elm, mesquite, and salt cedar are removed using techniques that do not disturb underground resources or pose the risk of contaminating radiocarbon dating samples. Using only chemicals known to have no effect on radiocarbon dating, Landmark staff selectively treats by hand areas overgrown with mesquite or elm as well as salt cedar plants late in the growing season, then removes the dead plant material at ground level. If the plant sprouts the next year, the treatment is repeated.

Recommendation/Change since last report:
The staff of the Lubbock Lake Landmark will continue to monitor short-term and potential long-term threats, taking appropriate corrective actions as necessary.