DN 17-01 DREDGING NOTICE
U.S. ARMY CORPS OF ENGINEERS
ST. PAUL DISTRICT
NOTICE DATE: April 4th, 2017 DREDGING CATEGORY: Imminent
MEETING DATE: If requested MEETING TIME:
BOAT REQUIREMENT: MEETING LOCATION:
DREDGE CUT NAME: Coulters Island RIVER MILE: 801.5 – 801.9
HISTORIC DATA
Frequency: 49% Avg. Quantity/Job: 26,360 yd3
Date Last Dredged: Oct. 26th, 2016 Avg. Quantity/Year: 12,899 yd3
SURVEY DATA
Date Surveyed: April 3rd, 2017
Water Surface Elevation: 674.6
Low Control Pool Elevation: 673.9
Net Difference: +0.7
5-Day River Forecast: holding steady
DREDGING DATA
Recommended Channel Width: 300 feet
Recommended Dredging Depth: 11 feet
Estimated Quantity: 24,020 yd3 - Includes 102 yd3 for access dredging at Corps Island
Type of Dredge: Contract Mechanical
Proposed Dredging Date: April 7th, 2017
Estimated Duration: 12 dredging days
Justification for Dredging: The navigation channel is restricted to 220 feet between the 9.0’ contours and closed between the 10.5’ contours.
MATERIAL PLACEMENT DATA
Proposed Placement Site: Corps Island
Location: 3-799.2-RMT
Site Characteristics: This is a historically used transfer site.
If you have any questions concerning this project or if you would like to request an on‑site meeting, please a Channel Maintenance Coordinator at (651) 290-5155.