US Army Corps of Engineers
St. Paul District Website

Dredging Public Notices

Dredge Notice 17-17 Crats Island

Published June 28, 2017

DN 17-17                                           DREDGING NOTICE

                                              U.S. ARMY CORPS OF ENGINEERS

                                                            ST. PAUL DISTRICT

 

NOTICE DATE: June 26th, 2017                               DREDGING CATEGORY: Imminent

MEETING DATE: If requested                                 MEETING TIME:

BOAT REQUIREMENT:                                          MEETING LOCATION:

DREDGE CUT NAME: Crats Island                                    RIVER MILE: 758.8 – 759.2

 

HISTORIC DATA

Frequency: 79%                                              Avg. Quantity/Job: 69,060 yd3

Date Last Dredged: June 1st, 2015                 Avg. Quantity/Year: 54,366 yd3

 

SURVEY DATA

Date Surveyed: June 23rd, 2017

Water Surface Elevation: 668.2

Low Control Pool Elevation: 666.5

Net Difference: +1.7’

5 Day River Forecast: Gradual Decline

 

DREDGING DATA

Recommended Channel Width: 450feet

Recommended Dredging Depth: 12 feet

Estimated Quantity: 21,919 yd3

Type of Dredge: Contract Mechanical

Proposed Dredging Date: June 28th, 2017

Estimated Duration: 10 dredging days

Justification for Dredging: The navigation channel is reduced to 360’ within the 9.0’ contours and closed within the 10.5’ contours.

 

MATERIAL PLACEMENT DATA

Proposed Placement Site: Alma Marina

Location: 4-754.0-LWP

Site Characteristics: This is a historically used permanent/upland placement 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 651-290-5154.

 


Dredge Notice 17-17 Crats Island

Published June 28, 2017

DN 17-17                                           DREDGING NOTICE

                                              U.S. ARMY CORPS OF ENGINEERS

                                                            ST. PAUL DISTRICT

 

NOTICE DATE: June 26th, 2017                               DREDGING CATEGORY: Imminent

MEETING DATE: If requested                                 MEETING TIME:

BOAT REQUIREMENT:                                          MEETING LOCATION:

DREDGE CUT NAME: Crats Island                                    RIVER MILE: 758.8 – 759.2

 

HISTORIC DATA

Frequency: 79%                                              Avg. Quantity/Job: 69,060 yd3

Date Last Dredged: June 1st, 2015                 Avg. Quantity/Year: 54,366 yd3

 

SURVEY DATA

Date Surveyed: June 23rd, 2017

Water Surface Elevation: 668.2

Low Control Pool Elevation: 666.5

Net Difference: +1.7’

5 Day River Forecast: Gradual Decline

 

DREDGING DATA

Recommended Channel Width: 450feet

Recommended Dredging Depth: 12 feet

Estimated Quantity: 21,919 yd3

Type of Dredge: Contract Mechanical

Proposed Dredging Date: June 28th, 2017

Estimated Duration: 10 dredging days

Justification for Dredging: The navigation channel is reduced to 360’ within the 9.0’ contours and closed within the 10.5’ contours.

 

MATERIAL PLACEMENT DATA

Proposed Placement Site: Alma Marina

Location: 4-754.0-LWP

Site Characteristics: This is a historically used permanent/upland placement 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 651-290-5154.