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High flow measurements are difficult and dangerous to perform at this gage as well as the SSVWARCO gage and are often <br />poor. Due to the remoteness of these gages, other locations for performing high water measurements are not possible. If a <br />bank operated cableway were installed at the SSVWARCO gage, some resolution of these issues may occur. That said, <br />another measurement in the 200-300 cfs range would be very helpful in building a new rating. Such a measurement would <br />need to incorporate observations about gate operation and GH reliability. A staff on the gate pool might help. Rtg. 3 had <br />been extended to 296 cfs based on a high measurement of 156 cfs made in 2006. However, the new high measurement <br />of 316 cfs had a very high shift (+0.37), indicating that the previous extension may not have been accurate. A new rating <br />may be in order if Msmt. No 143 is validated in the future by a similar high flow measurement with a reliable GH.