Project Location Map – This is a map that displays the location of the Monte Carlo, 
Challenger Wash, and Chihuahua Wash Flood Control Projects in Southern Arizona.

Figure 1 – This map shows where the City of Nogales is located in the state of Arizona.

Figure 3 – Ariel picture displaying the Monte Carlo Wash Storm Water Detention Basin 
and lines showing the size of the project. 

Figure 4 - Ariel picture displaying the Chihuahua Wash Storm Water Detention Basin 
and lines showing the size of the project.

Figure 5 – Ariel Picture displaying the Challenger Wash Storm Water Detention Basin 
and lines showing the size of the project.

Appendix B – Map showing 100-year floodplain delineations – existing and post-project 
conditions.