The replacement of Calaveras Dam will require the movement of more than 7 million cubic yards of rock and earth, a portion of which may contain Naturally Occurring Asbestos (NOA). Construction activities could cause asbestos fibers to become airborne, which could present a health concern. We have put into place an extensive dust control and air monitoring program to ensure that we are not exposing any members of the public to increased levels of Naturally Occurring Asbestos. We have monitored background air quality levels in the area prior to construction for more than two years. We will continue to monitor air quality at perimeter and ambient air quality monitoring stations and will make the data available on this website. Protecting the health of our workers and the public is our utmost priority.
To view the latest air quality monitoring results, click on our website here. Results are updated weekly and data is archived on a quarterly basis for the duration of the project. See map for monitoring locations and Q&A about how to read the graphs and data.