DN 22-15                                            DREDGING NOTICE

                                              U.S. ARMY CORPS OF ENGINEERS

                                                            ST. PAUL DISTRICT

NOTICE DATE: July 12^th, 2022                                DREDGING CATEGORY: Imminent

MEETING DATE: If requested                                 MEETING TIME:

BOAT REQUIREMENT:                                          MEETING LOCATION:

DREDGE CUT NAME: Diamond Bluff                   RIVER MILE: 800.1 – 800.7

HISTORIC DATA

Frequency: 50%                                              Avg. Quantity/Job: 34,100 yd³

Date Last Dredged: Oct. 6^th, 2021                  Avg. Quantity/Year: 17,050 yd³

SURVEY DATA

Date Surveyed: July 7^th, 2022

Water Surface Elevation: 674.3

Low Control Pool Elevation: 673.8

Net Difference: + 0.5’

5 Day River Forecast: Slow Decline

DREDGING DATA

Recommended Channel Width: 450 feet

Recommended Dredging Depth: 12 feet

Estimated Quantity:  25,889 yd³

Type of Dredge: Contract Mechanical Plant 2

Proposed Dredging Date: July 13^th, 2022

Estimated Duration: 13 dredging days

Justification for Dredging:  The navigation channel is reduced to 330’ between the 9’ contours and closed between the 10.5’ contours on a recommended bend of 450’.

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 a dredging manager at (651) 290-5155