DN 16-14 Updated DREDGING NOTICE
U.S. ARMY CORPS OF ENGINEERS ST. PAUL DISTRICT
NOTICE DATE: July 13th, 2016 DREDGING CATEGORY: Emergency
MEETING DATE: If requested MEETING TIME:
BOAT REQUIREMENT: MEETING LOCATION: DREDGE CUT NAME: Coulters Island RIVER MILE: 801.4 – 801.9
HISTORIC DATA
Frequency: 48% Avg. Quantity/Job: 26,217 yd3 Date Last Dredged: July 28th, 2015 Avg. Quantity/Year: 12,538 yd3
SURVEY DATA
Date Surveyed: July 12th, 2016 Water Surface Elevation: 674.2 Low Control Pool Elevation: 673.9 Net Difference: +0.3
5-Day River Forecast: Rapid Increase
DREDGING DATA
Recommended Channel Width: 300 feet Recommended Dredging Depth: 12 feet
Estimated Quantity: 15,104 yd3 - Includes 102 yd3 for access dredging at Corps Island Type of Dredge: Contract Mechanical
Proposed Dredging Date: July 13th, 2016 Estimated Duration: 8 dredging days
Justification for Dredging: The navigation channel is restricted to 120 feet between the 9.0’ contours (closing the channel to full width tows 105’) 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 call the Channel Maintenance Coordinator at (651) 290-5155.