Data logger records data from sensors. USGS computer downloads data from data logger on a daily schedule. The bolt is 3 ft streamward from the NW corner of the building which houses the gage, established 1966. This RP can be used as a tape down to water surface. 0.52 ft above mean sea level.
Hazards occur from floating debris, particularly at high flow.
During low flow, measurement times should be coordinated with the tide cycle for steady flow. Tide effect reverses flow during low-flow periods. No ice effect. Flow regulated by many reservoirs in the basin. Measuring conditions are good except at extremely low velocities.