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SWG-2005-01223 - Texas Department of Transportation-Houston District (TxDOT) - San Jacinto River - Harris County, Texas

Published March 17, 2020
Expiration date: 4/16/2020

Full Public Notice          Project Plans

PROJECT DESCRIPTION:  TxDOT proposes to permanently discharge 0.193 acres of fill material in the form of pilings and rip-rap into 338.4 linear feet (LF) of the San Jacinto River, during replacement of damaged dolphin structures and fender systems.  The applicant’s plans are enclosed in 11 sheets.

Four dolphin structures are to be replaced by the proposed project.  The existing damaged dolphin structures would be removed by heavy machinery on barges within the River channel and new dolphin structures would be installed in the same locations.  Each proposed structure is 30 LF, for a total of 120 LF of impacts.  The acreage of each proposed dolphin structure is 0.015 acre, for a total of 0.060 acre of permanent impacts.  The fenders of the proposed dolphin structures are 18-inch-diameter steel coated with a marine-grade epoxy coating.  It is undetermined if the pile fenders will be braced with either 18-inch- to 24-inch-diameter braces and timber railroad ties or plastic lumbers (Concept 1) or braced with 24-inch- to 36-inch-diameter bracings with pile fender wraps (Concept 2).  Both concepts would include pipe sleeves around the pile and would result in the same amount of permanent impacts to the San Jacinto River.

To repair the navigation fender system, 77 steel pilings would be required.  Each piling will be coated with a marine-grade epoxy coating and would measure approximately 1.5 LF, in diameter, and impact 0.00004 acre of the River.  Of the 77 fender pilings, 15 pilings would be located within the proposed rip-rap so the linear feet of impacts are only calculated for 64 pilings as the linear feet of impacts of the 15 pilings within the rip-rap are included in the rip-rap linear feet calculations.  These pilings would total 96 LF in permanent impacts to 0.003 acre.  Approximately 0.130 acre (1,454 cubic yards) of  24-inch stone rip-rap and 3-inch bedding material is to be placed along the proposed east fender, extending for 122.4 LF.