Barton Springs 'Facts' in Letter Are Wrong

RECEIVED Wed., Jan. 11, 2006

Dear Editor,
    An earlier letter to the Chronicle incorrectly states that the recharge zone and contributing zone for Barton Springs are extensively developed and incorrectly suggests that runoff from the development would not discharge to Barton Springs [“Postmarks,” Jan. 6]. However, less than one-half of the recharge zone is fully developed and only a small percent of the contributing zone is developed.
    Even then, substantial water-quality degradation has been documented at Barton Springs (www.ci.austin.tx.us/watershed/oprslade.htm).
    Although some degradation has occurred, the water quality of Barton Springs is still well within swimming criteria. However, it is likely that uncontrolled urbanization in the watersheds feeding the springs will eventually cause Barton Springs to be degraded to the extent that it must be closed to swimming.
Raymond Slade Jr.
Certified professional hydrologist
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