DN 20-38 DREDGING NOTICE
U.S. ARMY CORPS OF ENGINEERS
ST. PAUL DISTRICT
NOTICE DATE: September 8th, 2020 DREDGING CATEGORY: Imminent MEETING DATE: If requested MEETING TIME:
BOAT REQUIREMENT: MEETING LOCATION:
DREDGE CUT NAME: Head of Raft Channel RIVER MILE: 687.6 – 688.0
Frequency: 52% Avg. Quantity/Job: 35,113 yd3
Last Date Dredged: May 13th, 2020 Avg. Quantity/Year: 18,259 yd3
Date Surveyed: September 3rd, 2020
Water Surface Elevation: 630.2
Low Control Pool Elevation: 629.8
Net Difference: +0.4’
5 Day River Forecast: Holding Steady
Recommended Channel Width: 400 feet
Recommended Dredging Depth: 12 feet
Estimated Quantity: 30,713 yd3
Type of Dredge: Contract Mechanical plant 1
Dredging Start Date: September 8th, 2020
Estimated Duration: 15 dredging days
Justification for Dredging: The navigation channel is reduced to 260’ between the 9.0’ contours and 130’ between the 10.5’ contours, on a bend with a recommended width of 400 feet.
MATERIAL PLACEMENT DATA
Proposed Placement Site: Brownsville Containment
Site Characteristics: This is a historically used beneficial use stockpile site. We expect all material to be removed.
If you have any questions concerning this project, or if you would like to request an onsite meeting, please call a dredging manager at (651) 290-5155.