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  DN 17-20 Lower Zumbro
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Dredge Notice 17-20 Lower Zumbro

Posted: 7/14/2017

Expiration date:


DN 17-20                                            DREDGING NOTICE

                                               U.S. ARMY CORPS OF ENGINEERS

                                                            ST. PAUL DISTRICT

 

NOTICE DATE: July 14th, 2017                                DREDGING CATEGORY: Imminent

MEETING DATE: If requested                                  MEETING TIME:

BOAT REQUIREMENT:                                           MEETING LOCATION:

DREDGE CUT NAME: Lower Zumbro                    RIVER MILE: 744.2 – 744.6

 

HISTORIC DATA

Frequency: 59%                                             Avg. Quantity/Job: 33,600 yd3

Last Date Dredged: August 14th, 2016          Avg. Quantity/Year: 20,017 yd3

 

SURVEY DATA

Date Surveyed: July 12th, 2017

Water Surface Elevation: 659.6

Low Control Pool Elevation: 659.4

Net Difference: +0.2

5 Day River Forecast: Holding Steady

 

DREDGING DATA

Recommended Channel Width: 300 feet

Recommended Dredging Depth: 12 feet

Estimated Quantity: 21,637 yd3 plus 1,370 yd3 for placement site acess

Type of Dredge: Contract Mechanical

Proposed Dredging Date: July 19th, 2017

Estimated Duration:  11 Dredging Days

Justification for Dredging: The channel is reduced to 230’ between the 9’ contours and 60’ between the 10.5’ contours.

 

MATERIAL PLACEMENT DATA

Proposed Placement Site:  Lost Island

Location: 5-744.7-LWT

Site Characteristics: This is a historically used temporary placement site.

 

If you have any questions concerning this project, or if you would like to request an on‑site meeting, please call a Channel Maintenance Coordinator at (651) 290-5155.

 

 

Dan Cottrell

Channel Maintenance Coordinator

Dredge Lower Zumbro Mississippi River navigation sedimentation St. Paul District U.S. Army Corps of Engineers

ATTACHMENTS


  DN 17-20 Lower Zumbro
Bookmark and Share Email Print


Dredge Notice 17-20 Lower Zumbro

Posted: 7/14/2017

Expiration date:


DN 17-20                                            DREDGING NOTICE

                                               U.S. ARMY CORPS OF ENGINEERS

                                                            ST. PAUL DISTRICT

 

NOTICE DATE: July 14th, 2017                                DREDGING CATEGORY: Imminent

MEETING DATE: If requested                                  MEETING TIME:

BOAT REQUIREMENT:                                           MEETING LOCATION:

DREDGE CUT NAME: Lower Zumbro                    RIVER MILE: 744.2 – 744.6

 

HISTORIC DATA

Frequency: 59%                                             Avg. Quantity/Job: 33,600 yd3

Last Date Dredged: August 14th, 2016          Avg. Quantity/Year: 20,017 yd3

 

SURVEY DATA

Date Surveyed: July 12th, 2017

Water Surface Elevation: 659.6

Low Control Pool Elevation: 659.4

Net Difference: +0.2

5 Day River Forecast: Holding Steady

 

DREDGING DATA

Recommended Channel Width: 300 feet

Recommended Dredging Depth: 12 feet

Estimated Quantity: 21,637 yd3 plus 1,370 yd3 for placement site acess

Type of Dredge: Contract Mechanical

Proposed Dredging Date: July 19th, 2017

Estimated Duration:  11 Dredging Days

Justification for Dredging: The channel is reduced to 230’ between the 9’ contours and 60’ between the 10.5’ contours.

 

MATERIAL PLACEMENT DATA

Proposed Placement Site:  Lost Island

Location: 5-744.7-LWT

Site Characteristics: This is a historically used temporary placement site.

 

If you have any questions concerning this project, or if you would like to request an on‑site meeting, please call a Channel Maintenance Coordinator at (651) 290-5155.

 

 

Dan Cottrell

Channel Maintenance Coordinator

Dredge Lower Zumbro Mississippi River navigation sedimentation St. Paul District U.S. Army Corps of Engineers