DN 24-22                                            DREDGING NOTICE

                                              U.S. ARMY CORPS OF ENGINEERS

                                                            ST. PAUL DISTRICT

NOTICE DATE: Aug 16^th, 2024                                DREDGING CATEGORY: Imminent

MEETING DATE: If requested                                 MEETING TIME:

BOAT REQUIREMENT:                                          MEETING LOCATION:

DREDGE CUT NAME: Lower Approach LD 6                   RIVER MILE: RM 713.5 – 714.0

HISTORIC DATA

Frequency: 33%                                              Avg. Quantity/Job: 24,549 yd³

Last Date Dredged: June 28^th, 2023               Avg. Quantity/Year: 8,183 yd³

SURVEY DATA

Date Surveyed: August 14^th, 2024

Water Surface Elevation: 640.8

Low Control Pool Elevation: 638.5

Net Difference: +2.3’

5 Day River Forecast: Holding Steady

DREDGING DATA

Recommended Channel Width: 300 feet

Recommended Dredging Depth: 13 feet

Estimated Quantity: 29,413 yd³

Type of Dredge: Government Mechanical

Proposed Dredging Date: Aug 16^th, 2024

Estimated Duration: 8 – 24 hr dredging days

Justification for Dredging:  The approach area on the left descending side is closed between the 10’ contours, some vessels may be able to flank out of and into the lock but there is a significant challenge of maneuvering as well as a length restriction.

MATERIAL PLACEMENT DATA

Proposed Placement Site: Trempealeau

Location: 7-714.1-LWP

Site Characteristics: This is a permanent placement site with beneficial use. 

If you have any questions concerning this project or request an onsite meeting, please call a Channel Maintenance Coordinator  at

(651) 350-2564.