14242690 - TOUTLE RIVER AT HIGHWAY 99 NEAR CASTLE ROCK, WA

Latitude (degrees, minutes, and seconds) ......  461910
Longitude (degrees, minutes, and seconds) .....  1225427*
State Code ....................................  53
County Code ...................................  015
County Name ...................................  Cowlitz
Basin Name ....................................  Lower Cowlitz
Hydrologic Unit Code ..........................  17080005
Drainage Area (square miles) ..................  512.0**
Gage Datum (feet, 1929 NGVD) ..................  37.88

Location ...................... NE/SE, sec.27, T.10 N, R.2 W,
				on right bank at Old U.S.Highway 99 bridge,
				3.0 mi north of Castle Rock, and at mile 1.0.


----Period(s) of Record----
Surface-Water Discharge or Stage-Only: 1980-82
Surface-Water Quality: 1980-82


    * also published as longitude: 1225428

   ** 1) Approximately 21 sq.mi. is noncontributing.
         Prior to July 7, 1981, approximately 40 sq.mi. was noncontributing.
      2) USGS Surface Water Data Retrieval Program lists as 511.0 square miles

Site History and Remarks

Station was a State Department of Ecology water-quality site 1971-72, 1974-75. New gage in operation June 2, 1980.

Reach Description

This channel was altered on May 18, 1980, by conditions similar to those at the Toutle River at Tower Road. Although the bridge piers do not constrict the flow, the bridge is located at a channel constriction. During storm runoff, streamflow converges from two directions immediately above the bridge. This results in considerable mixing and turbulence at the sampling cross section. The channel has a sand bed at most stages.(Dinehart,1987)

Location Map

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