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Dredge Notice 17-28 Below Winona RR Bridge

Posted: 8/4/2017

Expiration date:


DN 17-28                                            DREDGING NOTICE

                                               U.S. ARMY CORPS OF ENGINEERS

                                                            ST. PAUL DISTRICT

 

NOTICE DATE: August 4th, 2017                             DREDGING CATEGORY: Imminent

MEETING DATE: If requested                                  MEETING TIME:

BOAT REQUIREMENT:                                           MEETING LOCATION

DREDGE CUT NAME: Below Winona RR Bridge  RIVER MILE: 722.8 – 723.2

 

HISTORIC DATA

Frequency: 47%                                             Avg. Quantity/Job: 25,734 yd3

Date Last Dredged: October 17th, 2016         Avg. Quantity/Year: 12,045yd3

 

SURVEY DATA

Date Surveyed:  July 29th, 2017

Water Surface Elevation: 644.9

Low Control Pool Elevation: 644.6

Net Difference: +0.3

5 Day River Forecast:  Holding steady

 

DREDGING DATA

Recommended Channel Width: 300 feet

Recommended Dredging Depth: 12 feet

Estimated Quantity: 14,971 yd3

Type of Dredge: Government Mechanical

Proposed Dredging Date: August 1st, 2017

Estimated Duration: 10 dredging days

Justification for Dredging: The navigation channel is reduced to 220’ between the 9’ contours and closed between 10.5’ contours.

  

MATERIAL PLACEMENT DATA

Proposed Placement Site: Mosquito Island, Homer

Location: 6-722.0-LWP,6-720.5-RMP

Site Characteristics:  Mosquito Island is a newly RRF endorsed placement site, the island will be extended upstream and protected with rock, soil and plantings when complete. The Homer placement site is a historically used stockpile site.

 

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

 

 

Below Winona RR Bridge Dredge Mississippi River navigation sedimentation St. Paul District U.S. Army Corps of Engineers

Bookmark and Share Email Print


Dredge Notice 17-28 Below Winona RR Bridge

Posted: 8/4/2017

Expiration date:


DN 17-28                                            DREDGING NOTICE

                                               U.S. ARMY CORPS OF ENGINEERS

                                                            ST. PAUL DISTRICT

 

NOTICE DATE: August 4th, 2017                             DREDGING CATEGORY: Imminent

MEETING DATE: If requested                                  MEETING TIME:

BOAT REQUIREMENT:                                           MEETING LOCATION

DREDGE CUT NAME: Below Winona RR Bridge  RIVER MILE: 722.8 – 723.2

 

HISTORIC DATA

Frequency: 47%                                             Avg. Quantity/Job: 25,734 yd3

Date Last Dredged: October 17th, 2016         Avg. Quantity/Year: 12,045yd3

 

SURVEY DATA

Date Surveyed:  July 29th, 2017

Water Surface Elevation: 644.9

Low Control Pool Elevation: 644.6

Net Difference: +0.3

5 Day River Forecast:  Holding steady

 

DREDGING DATA

Recommended Channel Width: 300 feet

Recommended Dredging Depth: 12 feet

Estimated Quantity: 14,971 yd3

Type of Dredge: Government Mechanical

Proposed Dredging Date: August 1st, 2017

Estimated Duration: 10 dredging days

Justification for Dredging: The navigation channel is reduced to 220’ between the 9’ contours and closed between 10.5’ contours.

  

MATERIAL PLACEMENT DATA

Proposed Placement Site: Mosquito Island, Homer

Location: 6-722.0-LWP,6-720.5-RMP

Site Characteristics:  Mosquito Island is a newly RRF endorsed placement site, the island will be extended upstream and protected with rock, soil and plantings when complete. The Homer placement site is a historically used stockpile site.

 

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

 

 

Below Winona RR Bridge Dredge Mississippi River navigation sedimentation St. Paul District U.S. Army Corps of Engineers