Location.--Latitude 47°18'19", Longitude
121°50'58", in NE 1/4 SE 1/4 Section 13, Township 21 North,
Range 7 East, in King County, Hydrologic Unit 17110013, on
left bank at City of Tacoma purification plant, 0.7 mile downstream
from diversion dam, 2.0 miles southeast of Palmer, and at river mile
60.3. Drainage
area is 231 mi2. Datum of
gage is 859.53 feet above NGVD of 1929, from topographic map.