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.