DN 23-37                                            DREDGING NOTICE

                                              U.S. ARMY CORPS OF ENGINEERS

                                                            ST. PAUL DISTRICT

NOTICE DATE: August 25^th, 2023                           DREDGING CATEGORY: Imminent MEETING DATE: If requested                            MEETING TIME:

BOAT REQUIREMENT:                                          MEETING LOCATION:

DREDGE CUT NAME: Head of Raft Channel         RIVER MILE: 687.5 – 688.2

HISTORIC DATA

Frequency: 53%                                              Avg. Quantity/Job: 35,298 yd³

Last Date Dredged: June 23^rd, 2021              Avg. Quantity/Year: 18,558 yd³

SURVEY DATA

Date Surveyed: August 23^rd, 2023

Water Surface Elevation: 630.0

Low Control Pool Elevation: 629.7

Net Difference: +0.3’

5 Day River Forecast: Holding Steady

DREDGING DATA

Recommended Channel Width: 400 feet

Recommended Dredging Depth: 12 feet

Estimated Quantity: 50,035 yd³

Type of Dredge: Government Hydraulic Dredge Goetz

Dredging Start Date: August 26^th, 2023

Estimated Duration: 7 dredging days

Justification for Dredging: The navigation channel is reduced to 290’ between the 9.0’ contours and 95’ between the 10.5’ contours, on a bend with a recommended width of 400 feet. 

MATERIAL PLACEMENT DATA

Proposed Placement Site: Brownsville Containment

Location: 8-688.7-RMP

Site Characteristics: This is a historically used beneficial use stockpile site. We expect all material to be removed.

If you have any questions concerning this project, or if you would like to request an onsite meeting, please call a dredging manager at (651) 290-5155.