1 inch equals 100 feet 
Legend 
Acquisition Boundary 
Ponding Limits, 100-Year Storm, WSE=3843.22 
Ponding Limits, Weir EL=3848.00 
Berm 
Figure 4 
Chihuahua Wash Storm Water 
Detention/Sedimentation Basin 
0 100 20050 
Feet 
P:\FEMA\Nogales\GIS\mxd\Chihuahua.mxd 
Pipe Drain 
Maintenance Road 
Working Draft 
Source: 
Imagery: City of Nogales 
Tetra Tech Inc., 2002 
URS Corporation, 2003 
Calle Chihuahua CalleChihuahuaOutlet Basin 
Inlet Basin 1 inch equals 100 feet 
Legend 
Acquisition Boundary 
Ponding Limits, 100-Year Storm, WSE=3843.22 
Ponding Limits, Weir EL=3848.00 
Berm 
Figure 4 
Chihuahua Wash Storm Water 
Detention/Sedimentation Basin 
0 100 20050 
Feet 
P:\FEMA\Nogales\GIS\mxd\Chihuahua.mxd 
Pipe Drain 
Maintenance Road 
Working Draft 
Source: 
Imagery: City of Nogales 
Tetra Tech Inc., 2002 
URS Corporation, 2003 
Calle Chihuahua CalleChihuahuaOutlet Basin 
Inlet Basin