Download PDF Packet - Agenda

II. Setback Line Determination
A key finding of this plan is the determination of the setback line. The setback line is
measured from the line of vegetation on the beach landward to a specified point which
will become known as the Erosion Response Plan Setback Line. The purpose of the
setback line is to minimize storm damage to structures on the island by preserving the
area seaward of the Setback Line and minimizing the number of structures in the area.
The plan is also intended to target for improvement, those foredune areas where the
dune system is narrow or contains the lowest elevation of dunes, providing little
protection against storm surge.
II.A. Setback Line Goals
Minimize future erosion, storm and flood losses;
Allow development to occur while providing sufficient seaward lands to
accommodate public access along the gulf beach;
Preserve dune system width to sustain the existing and future critical dune
system;
Identify criteria, uses and structures where no practicable alternative exists for
construction seaward of the setback line.
II.B. Assessment of Erosion Rates
The criteria for establishing the setback line is based on scientific studies of the
shoreline erosion along the Texas Coastline based during the last 70 years (Bureau
of Economic Geology). State law provides that a determination of erosion rates shall
be based on the University of Texas at Austin, Bureau of Economic Geology (BEG) or
other sources approved by the Texas General Land Office. Along the Texas Coast
the highest erosion rate by county is -2.80 meters or -9.19 feet per year in Jefferson
County . The lowest average rate on the Texas Coast is-.28 meters or -0.92 feet
per year for Nueces County. In Kleberg County the erosion rate is -0.54 meters or -
1.77 feet per year.
Figure 5: Erosion Rates Comparison
Revised Draft Nueces County / Corpus Christi Erosion Response Plan
May 1, 2012 Page 6