In this chapter:
(1) “Coastal marshes” means those soft, low-lying watery or wet lands and drainage areas in the coastal areas of the state that are of ecological significance to the environment and to the maintenance, preservation, and enhancement of wildlife and fisheries.
(2) “Coastal public land” means:
(A) the state-owned submerged land and the water overlying that land; and
(B) state-owned islands or portions of islands that may be affected by the ebb and flow of the tide.
(3) “Commission” means the Texas Transportation Commission.
(4) “Gulf Intracoastal Waterway” means the main channel, not including tributaries or branches, of the shallow draft navigation channel running from the Sabine River southward to the Brownsville Ship Channel near Port Isabel that is known as the Gulf Intracoastal Canal.
(5) “Department” means the Texas Department of Transportation.