Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/26487
Title: Environmental Assessment : Placement of Intracoastal Waterway and Okeechobee Waterway Dredged Material in the St. Lucie Inlet Sediment Impoundment Basin, Martin County, Florida
Authors: United States. Army. Corps of Engineers. Jacksonville District
Keywords: Dredging
Dredging spoil
Inland navigation
Saint Lucie Inlet (Fla.)
Publisher: United States. Army. Corps of Engineers. Jacksonville District.
Abstract: The U.S. Army Corps of Engineers, Jacksonville District (Corps), is proposing to conduct periodic maintenance dredging of the intersection of the Intracoastal Waterway (IWW) and Okeechobee Waterway (OWW) Federal navigation project at St. Lucie Inlet in Martin County, Florida. This Supplemental Environmental Assessment (SEA) will evaluate the periodic maintenance dredging at the intersection of the IWW and OWW with placement of dredged material into the St. Lucie Impoundment Basin. The Corps currently proposes to place approximately 10,000 CY of beach quality dredged material into the St. Lucie Impoundment Basin. OWW Cut 1 is approximately 3,500 feet in length and 80 feet wide with an authorized depth of eight feet and two feet overdepth. Authorized depth of the IWW is ten feet with two feet of overdepth. The centerline of Cut 1 extends into the intersection of the IWW along the eastern boundary of the Cut (OWW Cut 1 Sta. 00+00.00) and terminates at the midpoint of a widener along the western boundary of the Cut (OWW Cut 1 Sta. 35+17.51). The St. Lucie Impoundment Basin is approximately 8,500 feet east of OWW Cut 1 and is 1750 x 450 feet and is authorized to a depth of -16 feet MLW plus 2 feet allowable overdepth. The accumulation of sediment, commonly referred to as shoaling, has restricted the width of the project channel and reduced navigable depth. Minimum depths recorded from the project channel are less than 6 feet mean low water (MLW), resulting in navigation restrictions. Removal of the shoal material would maintain the navigable capacity of the project channel. This SEA will evaluate the proposed placement of dredged material in the St. Lucie Impoundment Basin from the periodic maintenance of the IWW and OWW Federal navigation projects, Martin County, FL (hereafter project channel).
Description: Environmental Assessment
Rights: Approved for Public Release; Distribution is Unlimited
URI: http://hdl.handle.net/11681/26487
Appears in Collections:Environmental Documents

Files in This Item:
File Description SizeFormat 
St_Lucie_IWW_Crossroads_EA_Final_Signed.pdf3.1 MBAdobe PDFThumbnail
View/Open