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  DN 17-24 Blacksmith Slough
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Dredge Notice 17-24 Blacksmith Slough

Posted: 7/25/2017

Expiration date:


DN 17-24                                            DREDGING NOTICE

                                               U.S. ARMY CORPS OF ENGINEERS

                                                            ST. PAUL DISTRICT

 

NOTICE DATE: July 25th, 2017                    DREDGING CATEGORY: Imminent

MEETING DATE: If requested                      MEETING TIME:

BOAT REQUIREMENT:                               MEETING LOCATION

DREDGE CUT NAME: Blacksmith Slough                          RIVER MILE: 719.0 – 719.4

 

HISTORIC DATA

Frequency: 17%                                             Avg. Quantity/Job: 18,826 yd3

Last Date Dredged: August 1st, 2016             Avg. Quantity/Year: 2,864 yd3

 

SURVEY DATA

Date Surveyed: July 14th, 2017

Water Surface Elevation: 644.5

Low Control Pool Elevation: 644.2

Net Difference: +0.3’

5-Day River Forecast: Slow Decline

 

DREDGING DATA

Recommended Channel Width: 300 feet

Recommended Dredging Depth: 12 feet

Estimated Quantity: 33,541 yd3

Type of Dredge: Government Mechanical

Proposed Dredging Date: July 26th, 2017

Estimated Duration: 21 dredging days

Justification for Dredging: The navigation channel is reduced to 220 feet between the 9.0’ contours and closed between the 10.5’ contours.

 

MATERIAL PLACEMENT DATA

Proposed Placement Site: Homer, Mosquito Island

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

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

 

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.

 

 

Blacksmith Slough Dredge Mississippi River navigation sedimentation St. Paul District U.S. Army Corps of Engineers

ATTACHMENTS


  DN 17-24 Blacksmith Slough
Bookmark and Share Email Print


Dredge Notice 17-24 Blacksmith Slough

Posted: 7/25/2017

Expiration date:


DN 17-24                                            DREDGING NOTICE

                                               U.S. ARMY CORPS OF ENGINEERS

                                                            ST. PAUL DISTRICT

 

NOTICE DATE: July 25th, 2017                    DREDGING CATEGORY: Imminent

MEETING DATE: If requested                      MEETING TIME:

BOAT REQUIREMENT:                               MEETING LOCATION

DREDGE CUT NAME: Blacksmith Slough                          RIVER MILE: 719.0 – 719.4

 

HISTORIC DATA

Frequency: 17%                                             Avg. Quantity/Job: 18,826 yd3

Last Date Dredged: August 1st, 2016             Avg. Quantity/Year: 2,864 yd3

 

SURVEY DATA

Date Surveyed: July 14th, 2017

Water Surface Elevation: 644.5

Low Control Pool Elevation: 644.2

Net Difference: +0.3’

5-Day River Forecast: Slow Decline

 

DREDGING DATA

Recommended Channel Width: 300 feet

Recommended Dredging Depth: 12 feet

Estimated Quantity: 33,541 yd3

Type of Dredge: Government Mechanical

Proposed Dredging Date: July 26th, 2017

Estimated Duration: 21 dredging days

Justification for Dredging: The navigation channel is reduced to 220 feet between the 9.0’ contours and closed between the 10.5’ contours.

 

MATERIAL PLACEMENT DATA

Proposed Placement Site: Homer, Mosquito Island

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

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

 

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.

 

 

Blacksmith Slough Dredge Mississippi River navigation sedimentation St. Paul District U.S. Army Corps of Engineers