DN 18-03 DREDGING NOTICE
U.S. ARMY CORPS OF ENGINEERS
ST. PAUL DISTRICT
NOTICE DATE: May 25th, 2018 DREDGING CATEGORY: Imminent
MEETING DATE: If requested MEETING TIME:
BOAT REQUIREMENT: MEETING LOCATION:
DREDGE CUT NAME: Fisher Island RIVER MILE: 745.0 – 745.2
HISTORIC DATA
Frequency: 79 % Avg. Quantity/Job: 48,180 yd3
Date Last Dredged: June 30th, 2017 Avg. Quantity/Year: 38,143 yd3
SURVEY DATA
Date Surveyed: May 24th, 2018
Water Surface Elevation: 660.3
Low Control Pool Elevation: 659.4
Net Difference: +0.9
5-Day River Forecast: Slow Decline
DREDGING DATA
Recommended Channel Width: 500 feet
Recommended Dredging Depth: 12 feet
Estimated Quantity: 6,423 yd3
Type of Dredge: Government Mechanical
Proposed Dredging Date: May 29th, 2018
Estimated Duration: 5 dredging days
Justification for Dredging: The navigation channel is reduced to 250’ between the 9’ contours and closed between the the 10.5’ contours. On a recommended bend width of 500’.
MATERIAL PLACEMENT DATA
Proposed Placement Site: Above Fisher Island
Location: 5-745.8-RMT
Site Characteristics: This is a historically used island transfer 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.