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SWG-2005-01290 - Port of Corpus Christi Authority - Nueces County

Published May 17, 2016
Expiration date: 6/2/2016

Full Public Notice          Project Plans

PROJECT DESCRIPTION:  The applicant requests an extension of time and an amendment to its previously authorized permit for dredging activities in the LQC and a 10-year maintenance dredging program.  The applicant is currently authorized to dredge approximately 1.4 million cubic yards of material within a 20-acre area at the junction of the CCSC and LQC to a depth of -45 feet mean low tide (MLT) with an additional -2 feet of advanced maintenance and up to -2 feet of allowable overdepth for a total possible depth of -49 feet MLT.  The applicant proposes to add two dredging areas (Northern and Southern Dredge Areas) and two dredged material placement areas (DMPA), the existing Good Hope DMPA and a new private Copano DMPA, to its project.  The Southern Dredge Area has an approximate size of 15.11 acres, which includes 8.57 acres that overlap the currently authorized dredge area and 6.54 acres of          new area.  The southern modification would widen the existing 400-foot-wide channel variably from approximately CE Station 32+15.62 to Station 60+00 up to an approximate 550-foot width on a 1V:2H side slope with a depth of -52 feet MLT plus -2 feet allowable overdepth (for a total possible depth of -54 feet MLT) to match the existing federal template in this reach.  This would result in dredging approximately 157,500 cubic yards of additional material.  The Northern Dredge Area is an approximate 14.87-acre area, and the modification would widen the existing 400-foot-wide channel variably between CE Station 230+00 to Station 280+00 up to an approximate 500-foot width on a 1V:2H side slope and the required depth of -47 feet MLT plus up to 2 feet of allowable overdepth (for a total possible depth of -49 feet MLT) to match the existing federal template in this reach.  This would result in dredging approximately 557,500 cubic yards of material.  Dredging would be conducted by either hydraulic or mechanical methods with dredged material placed in DMPAs 9, 10, and 13 as well as the additional DMPAs Good Hope and Copano.  The proposed Copano DMPA consists of three existing bauxite residue drying beds located near Copano Bay, in Aransas County, Texas.  The existing infrastructure and pipelines to hydraulically transport the dredged material extend from the LQC shoreline to the Copano DMPA and is currently serviceable.  The dredged material would be contained by existing levees surrounding the DMPA.  The applicant’s stated purpose of the proposed work is to improve navigational safety and general maneuvering effectiveness for a variety of vessels representing multiple waterway users within the CCSC and transiting the LQC to access existing and new facilities on the LQC and LQC Extension.