This Technical Data notebook has been prepared for a Letter of Map Revision application for a portion of the Via Entrada Wash located in Pima County, Arizona. The objective of the TDN and LOMR submission is provide regulatory discharge rates and floodplain limits along the Via Entrada Wash using better topographic, hydrologic, and hydraulic data.

We have an opportunity now that we have not had in the past 25 years to develop some comprehensive planning so that we can continue to enjoy the environmental amenities that make it so nice to live in Tucson. These species include not only the common one that we live with on a day to day basis, but also some of the rare species that most of us are not lucky enough to see (but still care about preserving).

Ranching was and is a distinct American culture with a distinct set of knowledge, values and beliefs. Many of those communities have been weakened by the relentless urbanization of Arizona, but now is the time to create new communities where environmentalists, hunters, birdwatchers, and hikers partner with ranchers to preserve and restore the open spaces we all cherish.