Big Dobe North, also known as Raker and Thomas, is a privately owned dam located in Modoc, California. Completed in 1912, this earth dam stands at a height of 9 feet and has a storage capacity of 6530 acre-feet, primarily serving the purpose of water supply for irrigation. Situated on Tr Rattlesnake Creek in Big Sage Reservoir, the dam covers a surface area of 1600 acres and has a drainage area of 17 square miles.

The dam has a low hazard potential and is currently in satisfactory condition as per the last assessment in September 2017. It is regulated by the California Department of Water Resources and undergoes regular inspections and enforcement to ensure its safety and compliance with state regulations. The dam's emergency action plan status and risk assessment measures are currently unspecified, indicating a need for further evaluation and preparedness in the event of any unforeseen emergencies.

With its historical significance dating back over a century, Big Dobe North serves as a vital water resource infrastructure in California's water supply network. Its location within the Sacramento District and oversight by state regulatory agencies highlight its importance in maintaining water security and irrigation needs for the surrounding communities. As climate change continues to impact water resources, the maintenance and upkeep of dams like Big Dobe North are crucial in ensuring sustainable water management practices for the future.