KNAPPA, - Station ID: 9439069

Established:May 20, 1935
Time Meridian:120° W
Present Installation:Sep 14, 1981
Date Removed:1981-12-09
Water Level Max (ref MHHW):N/A
Water Level Min (ref MLLW):N/A
Mean Range:6.67 ft.
Diurnal Range:8.34 ft.
Latitude46° 11.2' N
Longitude123° 35.3' W
NOAA Chart#:18523
Met Site Elevation: ft. above
Today's Tides (LST/LDT)
graphical depiction of low tide
3:29 AM
3:29 AMlow 1.2 ft.
9:19 AMhigh 5.1 ft.
2:50 PMlow 2.4 ft.
8:36 PMhigh 7.1 ft.

How to reach: To reach the tidal bench marks from Astoria, proceed 16.9 km (10.5 mi) east on U.S. Highway 30 to Knappa Road, turn north onto Knappa Road for 0.3 km (0.2 mi) around bend in road, then turn right onto Blind Slough Road and go 1.9 km (1.2 mi) north to a wooden bridge over railroad tracks; cross the bridge and continue 0.3 km (0.2 mi) north to the end of the road at Knappa Dock. The bench marks are located along Knappa Dock Road, Waterhouse Road, and Knappa Plat Road. The tide gage and staff were located about 152 m (500 ft) SW of Knappa Dock Road on the pilings of a floating pier.

Products available at 9439069 KNAPPA,