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County biologists report thousands of aquatic organisms removed near Garlock Road; commissioners note lack of routine post-project monitoring
Summary
A consultant report on the Garlock Road culvert project found roughly 4,000 aquatic organisms removed within a 250-foot isolated stream reach, including juvenile coho and Chinook; county staff said the fish-recovery prioritization uses blockage percentages and that formal post-project fish counts are not routinely required.
County engineer Susan Eugenas reported results from a consultant’s defishing report connected to the Garlock Road culvert replacement: within an isolated 250-foot reach, consultants collected about 4,000 aquatic organisms, including more than 2,000 lamprey (1–6 inches), 345 juvenile coho (2–3 inches), 10 juvenile Chinook (about 3 inches), and 40 cutthroat trout (3–8 inches).
Eugenas said the numbers demonstrate the presence of target species. “I just wanted to share that because I found it interesting of how many creatures there were in 250 feet of stream and that we really do have the target species of coho and Chinook in that stream that we're working on,” she told commissioners.
Commissioners pressed staff on whether the county conducts formal post-construction fish monitoring to verify project benefits. Staff and a commissioner described current practice: the fish recovery prioritization and grant review process relies on engineering measures of blockage—specifically how a structure restricts passage for a six-inch salmonid—when setting project priorities. “When the fish passage is put in, the assumption is just made that it improved the numbers of fish because it's no longer 60% blocked,” a county speaker said; commissioners noted that visual observations sometimes confirm fish movement after work but that systematic post-project monitoring is not a standard deliverable from the fish-recovery boards.
Eugenas added the county will continue other projects on Delameter Creek (Garlock Road is on Arkansas/Delameter Creek system) and that two additional projects are scheduled upstream to improve fish passage further. No formal change to monitoring policy or an additional monitoring contract was approved during the meeting.
