DN 17-27 DREDGING NOTICE
U.S. ARMY CORPS OF ENGINEERS
ST. PAUL DISTRICT
NOTICE DATE: July 28th, 2017 DREDGING CATEGORY: Imminent
MEETING DATE: If requested MEETING TIME:
BOAT REQUIREMENT: MEETING LOCATION:
DREDGE CUT NAME: Head of Raft Channel RIVER MILE: 687.7 – 688.1
HISTORIC DATA
Frequency: 49% Avg. Quantity/Job: 37,328 yd3
Last Date Dredged: August 30th, 2016 Avg. Quantity/Year: 18,267 yd3
SURVEY DATA
Date Surveyed: July 27th, 2017
Water Surface Elevation: 630.2
Low Control Pool Elevation: 629.7
Net Difference: +0.5’
5 Day River Forecast: Slow Decline
DREDGING DATA
Recommended Channel Width: 400 feet
Recommended Dredging Depth: 12 feet
Estimated Quantity: 30,547 yd3
Type of Dredge: Government Hydraulic
Proposed Dredging Date: July 28th, 2017
Estimated Duration: 4 dredging days
Justification for Dredging: The navigation channel is reduced to 320 feet between the 9.0’ contours and reduced to 180 feet between the 10.5’ contours, on a recommended bend of 400’.
MATERIAL PLACEMENT DATA
Proposed Placement Site: Brownsville
Location: 8-688.7-RMP
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 Channel Maintenance Coordinator at (651) 290-5155.