Native Aquatic Species of the Gila River Basin
in Arizona and New Mexico
Improvement of Grade Control
Structures on Sonoita Creek
 The loose-rock grade control structure prior to improvement - February 2003. |
 Completed grade control structure and/ or fish barrier - May 2004. |
Last Reviewed:
December 30, 2009
Webmaster:
Joseph J. Billerbeck - jbillerbeck@usbr.gov