SURFACE-WATER FIELD TECHNIQUES

West Fork Bitterroot River near Conner, Montana - n = 0.036

(Source: U.S.G.S Water Supply Paper 1849)

Site Description

Reach properties

Plan sketch and cross sections

Site photos

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Site Description

• Station name	West Fork Bitterroot River near Conner, Montana
  Station number	12-3425
  Gage location	Lat 45°44', long 114°17', in NE 1/4 NW 1/4 sec. 26, T. 1 S., R. 22 W., on right bank 0.5 mile downstream from Painted Rocks Lake, 6 miles upstream from Nez Perce Creek, and 16 miles southwest of Conner. Section 1 is about 600 ft downstream from gage.
  Drainage area	317 sq mi.
  Date of flood	May 29, 1948
  Gage height	6.08 ft at gage: 3.27 ft at section 1
  Peak discharge	3,880 cfs
  Computed roughness coefficient	Manning n = 0.036
  Description of channel	Bed is gravel and boulders;. d50 = 172 mm, d84 = 265 mm.The left bank is lined with overhanging bushes. The right bank is lined with trees.

  Introduction Page || Site Description || Reach Properties

  Plan Sketch and Cross Sections || Site Photos

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Reach Properties

• Section	Area (sq ft)	Top Width (ft.)	Mean depth (ft)	Hydraulic radius (ft)	Mean velocity (ft per sec)	Lenght (ft) between sections	Fall (ft) between sections
  1	504	107	4.7	4.62	7.70	.......	.....
  2	494	105	4.7	4.57	7.85	222	1.02
  3	516	103	5.0	4.82	7.52	302	1.40

  Introduction Page || Site Description || Reach Properties

  Plan Sketch and Cross Sections || Site Photos

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Plan Sketch and Cross Sections

Plan sketch and cross sections, West Fork Bitterroot River near Conner, Montana.

• Introduction Page|| Site Description || Reach Properties

  Plan Sketch and Cross Sections || Site Photos

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Site Photos

Photo 175: Downstream from section 1, West Fork Bitterroot River near Conner, Montana.

Photo 177: Downstream from right bank above section 1, West Fork Bitterroot River near Conner, Montana.

Introduction Page || Site Description || Reach Properties

Plan Sketch and Cross Sections || Site Photos

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