DN 18-14 DREDGING NOTICE
U.S. ARMY CORPS OF ENGINEERS
ST. PAUL DISTRICT
NOTICE DATE: July 16th, 2018 DREDGING CATEGORY: Imminent
MEETING DATE: If requested MEETING TIME:
BOAT REQUIREMENT: MEETING LOCATION:
DREDGE CUT NAME: Boulanger Bend Lwr. Lt. RIVER MILE: 819.9-820.4
HISTORIC DATA
Frequency: 19% Avg. Quantity/Job: 48,171 yd3
Date Last Dredged: May 30, 2017 Avg. Quantity/Year: 9,032 yd3
SURVEY DATA
Date Surveyed: July 12th, 2018
Water Surface Elevation: 687.8
Low Control Pool Elevation: 686.3
Net Difference: +1.5’
5 Day River Forecast: Steady Decrease
DREDGING DATA
Recommended Channel Width: 400 feet
Recommended Dredging Depth: 12 feet
Estimated Quantity: 36,198 yd3
Type of Dredge: Contract Mechanical
Proposed Dredging Date: July 16th, 2017
Estimated Duration: 18 days
Justification for Dredging: The navigation channel is closed between the 10.5 foot contours and restricted to 155 feet between the 9.0 foot contours.
MATERIAL PLACEMENT DATA
Proposed Placement Site: Lower Boulanger & Upper Boulanger
Location: 2-821.1-LMT and 2-821.5 LMT
Site Characteristics: These are historically used temporary placement site.
If you have any questions concerning this project, or if you would like to request an on‑site meeting, please call (651) 290-5152.