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.