Sleepy Hollow No. 2 is a privately owned dam located in Sonoma, California, near the city of Lekeville. Built in 1949, this earthen dam serves primarily for water supply purposes, including irrigation and water storage. With a height of 39 feet and a hydraulic height of 33.3 feet, it impounds water from the Tr Petaluma Creek, with a storage capacity of 104 acre-feet and a surface area of 5 acres.

Managed by the California Department of Water Resources (DWR) under the Safety of Dams program, Sleepy Hollow No. 2 is subject to state regulations, permitting, inspections, and enforcement to ensure its safe operation. The dam has a significant hazard potential but has been assessed as satisfactory in condition as of September 2017. The last inspection was conducted in August 2020, with a frequency of once per year to monitor its structural integrity and safety.

Although there are no associated structures with Sleepy Hollow No. 2, its critical role in water supply for the region underscores the importance of regular maintenance and monitoring. As climate change continues to impact water resources and infrastructure, ensuring the safety and reliability of dams like Sleepy Hollow No. 2 becomes increasingly crucial for sustainable water management in California.