DN 20-27                                           DREDGING NOTICE

                                              U.S. ARMY CORPS OF ENGINEERS

                                                            ST. PAUL DISTRICT

NOTICE DATE: July 10^th, 2020                                DREDGING CATEGORY: Imminent

MEETING DATE: If requested                                 MEETING TIME:

BOAT REQUIREMENT:                                          MEETING LOCATION:

DREDGE CUT NAME: Petersons Bar                     RIVER MILE: MN River 11.7 – 12.6

HISTORIC DATA

Frequency: 60%                                              Avg. Quantity/Job: 18,371 yd³

Last Date Dredged: Sept. 12^th, 2019              Avg. Quantity/Year: 11,023 yd³

SURVEY DATA

Date Surveyed: July 6^th, 2020 

Water Surface Elevation: 694.4

Low Control Pool Elevation: 686.8

Net Difference: +7.6’

5 Day River Forecast: steady decline

DREDGING DATA

Recommended Channel Width: 100 feet

Recommended Dredging Depth: 11 feet

Estimated Quantity: 30,343 yd³ plus 412 yd³ placement site access

Type of Dredge: Contract Mechanical Plant 3

Proposed Dredging Date: July 14^th, 2020

Estimated Duration: 15 dredging days

Justification for Dredging:  The navigation channel is closed to the 9.0’ contours once the water levels get down to Low Control Pool.

MATERIAL PLACEMENT DATA

Proposed Placement Site: Cargill East River

Location: MN-14.1-RMP

Site Characteristics: This is an upland beneficial use stockpile site provided to the Corps by the Lower MN River Watershed District. 

If you have any questions concerning this project or want to request an on‑site meeting please call a dredging manager at (651) 290-5155.