9421

• UCREFRP Catalog Number: 9421
• Author: FLO Engineering, I.
• Title: Post-Restoration Sedimentation and Erosion Monitoring/Evaluation for Green River Floodplain Habitat Resoration Sites, near Vernal, Utah.
• USFW Year: 1999.
• USFW - Doc Type: Volume IIA,
• Copyright Material: NO

• Table 1a. Comparison of Scour and Deposition for the Bonanza Bridge River Cross Sections June 1996
to June 1997
Cross Section Range of Scour (-) & Deposition (+) in feet Comments
Left 1/3 of
channel Center 1/3
of channel Right 1/3
of
channel Average
Change
BB-1 -6 to 0 0 to +0.5 -3 to 0 -2 Thalweg scoured deeper and
narrowed 3 `
BB-2 0 to 2 -2 to +2 -0.5 to 0 +0.5 Minor deposition and bar shifting
BB-3 0 to 3 -2 to +2 -1 to 0 +0.5 Minor deposition and bar shifting
BB-4 -1.5 to 0 -3 to 0 +0.5 to 4 0 Bar shifting
Table 1 b. Comparison of Scour and Deposition for the Bonanza Bridge River Cross Section June 1997 to
June 1998
Cross Section Range of Scour (-) and Deposition (+) in feet Comments
Left 1/3
of channel Center
1/3~d of
channel Right 1/3
of channel Average
Change
BB-1 0 to 1 -1.5 to 0 -0 To 2 0 Bar shifting, widening of thalweg.
BB-2 -2.5 to 0 -2.5 to 0 -1 to 0 -1 Bar shifting, minor scour
BB-3 -2 to +1 0.5 to 5 -2.5 to -1 0 Bar shifting, no overall change
BB-4 0 to 2 -2 to +3 -2 to 0 0 Bar shifting, no overall change
Table 1c. Comparison of Scour and Deposition for the Bonanza Bridge Bottomland Cross Sections June
1996 to May 1997
•
Cross Section Range of Scour (-) & Depositi on (+) in feet Comments
Left 1/3 of
channel Center 1/3
of channel Right 1/3
of
channel Average
Change
BB-5B 0 to 0.25 0 0 to 0.25 0 Some minor deposition
BB-6B 0 0 0 0 No changes
BB-76 0 0 0 0 No changes
BB-86
-- 0 0 0 0 April 1997 data is not accurate within

0.25'
Table 1 d. Comparison of Scour and Deposition for the Bonanza Bridge Bottomland Cross Sections May
1997 to June 1998
Cross Section Range of Scour (-) & Deposition (+) in feet Comments
Left 1/3 of
channel Center 1/3
of channel Right 1/3
of
channel Average
Change
BB-5B -0.25 to 0 0 to 0.5 -0.25 to 0 +0.25 Deposition in middle, scour along
sides
BB-66 0 0 to 0.25 0 0 Minor deposition
BB-7B 0 0 0 0 No change
BB-86 0 0 0 0 No change
3-5