Prevent, mitigate, abate or control geologic hazards within the District, through: 

Strict adherence to the District’s governing documents and plan of control 

Maintaining reliable and useful access to constituents 

Operating using sound and responsible financial management.



The Blackhawk GHAD

The Blackhawk GHAD was formed in 1986 and addresses landslide hazards within the Blackhawk district. Members of the Contra Costa Board of Supervisors, acting as an independent Board, serve as the GHAD Board of Directors.

The Blackhawk GHAD Plan of Control specifies that the GHAD General Manager will address (at his or her discretion) landslides or potential landslides involving two or more properties with exceptions or limitations including the following:

  • Landslides contained within a single property (certain exceptions apply)

  • Landslides related to structures built within established setback areas

  • Landslide damaged or destroyed structures

  • Landslides caused by property owner negligence

  • Landslide repair costs that exceed the protected asset value

  • Landslides located outside GHAD boundaries, with the conditioned exception of those geologic hazards that threaten properties within the GHAD

  • When the limitation of funds prevents action

  • When another district or service area has primary responsibility

The Blackhawk GHAD maintains proactive and reactive response capabilities within the district through the implementation of a comprehensive preventive maintenance program that includes monitoring and maintaining several hundred district-wide assets and instrumentation sites, as well as conducting studies and research to utilize new technologies. Additionally, the Blackhawk GHAD maintains a full array of response capabilities to address landslide activity and related incidents as they arise.