Galveston District FY27 Project Descriptions - SDtB

Work for the Sabine-Neches Waterway (SNWW) for maintenance dredging will require a hopper and pipeline/mechanical dredge(s). The dredge(s) must have the capability to dredge maintenance material up to a depth of -42 ft MLLW and to transport the dredged sediment to a designated Dredged Material Placement Area (DMPA).

Dredged material shall be placed in multiple DMPAs depending on the reach to be dredged and DMPA availability. Potential DMPAs include multiple upland placement areas along the SNWW channel, the Ocean Dredged Material Disposal Sites (ODMDS), and beneficial use site locations.

The transport distance to the designated placement areas varies significantly, ranging from direct, local placement to a few miles for the upland placement areas and beneficial use sites, and up to 35 miles for ocean disposal.

Work for the Galveston Harbor & Channel will require a hopper dredge(s) to perform maintenance dredging up to a depth of -48 ft MLLW, with an additional requirement for increased advanced maintenance (new work) dredging to a depth of -51 ft MLLW within a limited portion of the project footprint. The dredge(s) must have the capability to perform this work and transport the dredged sediment up to 24 miles to the designated placement area. Dredged material shall be placed in the Galveston Ocean Dredged Material Disposal Site (ODMDS), with potential Beneficial Use placement on Galveston Island.

Work for the Houston Ship Channel for maintenance dredging will require a hopper and pipeline/mechanical dredge(s). The dredge(s) must have the capability to dredge maintenance material up to a depth of -54.5 ft MLLW and to transport the dredged sediment to a designated Dredged Material Placement Area (DMPA).

Dredged material shall be placed in multiple DMPAs depending on the reach to be dredged and DMPA availability. Potential DMPAs include multiple upland placement areas along the Houston Ship Channel and the Galveston Ocean Dredged Material Disposal Site (ODMDS). The transport distance to the designated placement areas varies significantly, ranging from direct, local placement to a few miles for the upland placement areas, and up to 38 miles for ocean disposal.

Work for the Texas City Ship Channel for maintenance dredging will require a pipeline or hopper dredge(s). The dredge(s) must have the capability to dredge maintenance material up to a depth of - 48 ft MLLW, with an additional requirement for increased advanced maintenance (new work) dredging to a depth of -51 ft MLLW within a limited portion of the project footprint. The dredge(s) must have the capability to perform this work and transport the dredged sediment to a designated Dredged Material Placement Area (DMPA).

Dredged material can be placed in multiple DMPAs depending on the reach to be dredged and DMPA availability. Potential DMPAs include upland confined placement areas, semiconfined beneficial use sites, and the Ocean Dredged Material Disposal Sites (ODMDS). The transport distance to the designated placement areas varies significantly, ranging from direct, local placement to a few miles for the beneficial use sites, and up to 21 miles for ocean disposal.

Work for the Freeport Harbor Channel for maintenance dredging will require a hopper and pipeline/mechanical dredge(s). The dredge(s) must have the capability to dredge maintenance material up to a depth of -60 ft MLLW and to transport the dredged sediment to a designated Dredged Material Placement Area (DMPA).

Dredged material shall be placed primarily in the Ocean Dredged Material Disposal Site (ODMDS) and the upper reach of the channel shall be placed into an upland confined DMPA. The transport distance to the designated placement areas varies, ranging from direct, local placement and up to 6 miles for ocean disposal.

Work for the Matagorda Ship Channel (MSC) for maintenance dredging will require a hopper and pipeline dredge(s). The dredge(s) must have the capability to dredge maintenance material up to a depth of -40 ft MLLW and to transport the dredged sediment to a designated Dredged Material Placement Area (DMPA).

Dredged material shall be placed in multiple DMPAs depending on the reach to be dredged and DMPA availability. Potential DMPAs include multiple open water placement areas along the MSC channel, a semi-confined placement area, the Ocean Dredged Material Disposal Sites (ODMDS), and beneficial use site locations. The transport distance to the designated placement areas varies significantly, ranging from direct, local placement to a few miles for the semi-confined placement area and beneficial use sites. The transport distance to the designated placement areas varies, ranging from direct, local placement and up to 2 miles for ocean disposal.

Work for the Channel to Victoria (CTV) for maintenance dredging will require pipeline dredge(s).

The dredge(s) must have the capability to dredge maintenance material up to a depth of -16 ft MLLW and to transport the dredged sediment to a designated Dredged Material Placement Area

(DMPA).

Dredged material shall be placed in multiple DMPAs depending on the reach to be dredged and DMPA availability. Potential DMPAs include multiple upland placement areas along the CTV channel, and beneficial use site locations. The transport distance to the designated placement areas varies significantly, ranging from direct, local placement to a few miles for the upland placement areas and beneficial use sites.

Work for the Corpus Christi Ship Channel (CCSC) for maintenance dredging will require a hopper

56 ft MLLW and transport the dredged sediment to the designated placement area. Dredged material shall be placed in the Corpus Christi Ocean Dredged Material Disposal Site (ODMDS) with potential Beneficial Use placement on San Jose Island.

Work for the Brazos Island Harbor Channel (BIH) and the Channel to Port Isabel for maintenance dredging will require a hopper and pipeline/mechanical dredge(s). The dredge(s) must have the capability to dredge maintenance material up to a depth of -58 ft MLLW and to transport the dredged sediment to a designated Dredged Material Placement Area (DMPA).

Dredged material shall be placed in multiple DMPAs depending on the reach to be dredged and DMPA availability. Potential DMPAs include multiple upland placement areas along the BIH channel, near shore placement and beach placement locations along South Padre Island. The transport distance to the designated placement areas varies, ranging from a few miles for the upland placement areas and up to approximately 7 miles for near-shore and beach placement.

Work for the Gulf Intracoastal Waterway Channel (GIWW) from Matagorda Bay to Port Isabel and tributary channels for maintenance dredging will require a pipeline dredge(s). Tributaries include:

Channel to Port Aransas; Lydia Ann Channel; Port Isabel Harbor of Refuge; and Port Isabel Small Boat Harbor. The dredge(s) must have the capability to dredge maintenance material up to a depth of -17 ft MLLW and to transport the dredged sediment to a designated Dredged Material Placement Area (DMPA).

Dredged material shall be placed in multiple DMPAs depending on the reach to be dredged and DMPA availability. Potential DMPAs include upland, semi-confined, open water, bird islands, thin-layer sea grass, marsh and beach placement. The transport distance to the designated placement areas varies significantly, typically ranging from a few miles and up to 10 miles.

Work for the Channel to Harlingen (CTH) for maintenance dredging will require a pipeline

17 ft MLLW and to transport the dredged sediment to a designated Dredged Material Placement Area (DMPA).

Dredged material shall be placed in multiple DMPAs depending on the reach to be dredged and DMPA availability. Potential DMPAs include multiple upland placement areas along the CTH channel. The transport distance to the designated placement areas varies, typically ranging from direct, local placement up to 5 miles for the upland placement areas.