The contributing zone is the area or watershed where runoff from
precipitation flows to the recharge zone of the Edwards Aquifer.
“Contributing Zone Plan” (CZP) is a general term that
can refer to the plan itself, an exception request, a modification
to a previously approved plan, or an extension request.
Required Application
The forms for a complete CZP specify
additional information that must be attached, such as maps, site
plans, construction notes and details, calculations for the removal
of suspended solids, and the sizing for permanent best management
practices.
The CZP must also include information on best management
practices that will be used during construction. You may include a
storm water pollution prevention plan which is required by the
TPDES Construction General Permit to satisfy this
requirement.
Contributing Zone Exception Request
You may request an exception from submitting a CZP because your
site already has a CZP, and you plan on adding a negligible
increase in impervious cover.
