DN 19-09 DREDGING NOTICE
U.S. ARMY CORPS OF ENGINEERS
ST. PAUL DISTRICT
NOTICE DATE: May 20th, 2019 DREDGING CATEGORY: Emergency
MEETING DATE: If requested MEETING TIME:
BOAT REQUIREMENT: MEETING LOCATION:
DREDGE CUT NAME: Boulanger Bend RIVER MILE: 821.0 – 821.3
HISTORIC DATA
Frequency: 37% Avg. Quantity/Job: 53,765yd3
Date Last Dredged: May 15th, 2017 Avg. Quantity/Year: 19,750 yd3
SURVEY DATA
Date Surveyed: May 7th, 2019
Water Surface Elevation: 688.1
Low Control Pool Elevation: 686.3
Net Difference: + 1.8’
5 Day River Forecast: Holding Steady
DREDGING DATA
Recommended Channel Width: 500
Recommended Dredging Depth: 11 feet
Estimated Quantity: 6,628 yd3 actual quantity
Type of Dredge: Contract Mechanical (Purchase order contract)
Proposed Dredging Date: Completed May 22nd – May 24th
Estimated Duration: 2.5 dredging days
Justification for Dredging: Channel is reduced to 135’ between the 9.0’ contours and closed between the 10.5’ contours. On a recommended bend width of 500’.
MATERIAL PLACEMENT DATA
Proposed Placement Site: Boulanger Bend Lower Light
Location: 2-821.1-LMT
Site Characteristics: This is a 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 a dredging manager at (651) 290-5155.