These trends include all counts of fish obtained at a hatchery or one of its satellite facilities. The only method allowed is hatchery rack / weir, and the count types are either total live fish or total live fish returned above hatchery (for fish passed above the barrier). Life stage may be adults, jacks, or a combination of the two life stages, and is presumed to be adults, unless specified otherwise in the source documentation. The principal sources of these data are published agency reports, and unpublished agency files and data bases. More technical information is available for this data category's database structure.