Restoring navigation and coastal habitat

Port Mansfield Dredging and Beneficial Use Regulatory Coordination

The Port Mansfield Navigation Channel is the sole gateway between the Gulf of Mexico and the Port of Mansfield, and one of only two tidal connections to the Lower Laguna Madre, which are important for water quality and fish passage. Since its construction in 1957, the narrow, man‑made inlet has experienced rapid shoaling, restricting navigation, disrupting sediment movement, and accelerating erosion along Padre Island National Seashore. These challenges have not only threatened critical coastal habitats, but also the economic vitality of Port Mansfield.

In response, the Willacy County Navigation District partnered with the U.S. Army Corps of Engineers (USACE), Texas General Land Office (GLO), and National Park Service (NPS)–Padre Island National Seashore to develop a beneficial use of dredged material (BUDM) program aligned with the Coastal Texas Environmental Restoration initiative. On behalf of the GLO, we supported the District by leading coordination among agencies and developing a sustainable BUDM strategy that balances navigation needs with ecological restoration.

The goal was twofold: restore safe navigation through the channel while redirecting dredged sediment to rebuild eroding beaches, dunes, and habitats impacted by sea level rise and sediment starvation. Our work included environmental surveys, agency consultations, archaeological assessments, and topographic and bathymetric data collection, as well as preparation of USACE Section 10/404 and Section 408 permit applications. Following coordination with USACE and NPS, permits for navigation channel dredging and beach placement along Padre Island National Seashore were submitted in early 2024 and issued in December of 2025.

Building on this effort, we are advancing final design for dredging and beach nourishment while also supporting a parallel feasibility study for creating new rookery islands using dredged material from the channel.

Guided by extensive seagrass surveys and hydrodynamic modeling, the project integrates ecological design and cost‑efficient construction to create resilient avian habitat while protecting sensitive seagrass resources. It demonstrates how navigation, habitat restoration, and coastal resilience can move forward together.