Powerline Plan and Environ. Assessment Jan. 2013 - Flood Control ...

Powerline Flood Retarding Structure
Pinal County, AZ
Draft Supplemental Watershed Plan
and Environmental Assessment
Appendix C
Support Maps
Figure C-1. Powerline FRS Existing Embankment - Typical Section
Figure C-2. Powerline FRS Principal Spillway
Figure C-3. Powerline FRS Auxiliary Spillway
Figure C-4. Earth Fissure Risk Zones
Figure C-5. Plan View Preferred Alternative
Figure C-6. Proposed Powerline Channel – Typical Section
Figure C-7. Proposed Powerline Channel – Hardened Typical Section
Figure C-8. Plan View of Proposed North Diversion Channel
Figure C-9. Proposed North Diversion Channel - Typical Section
Figure C-10. Emergency Spillway Inundation Areas – Powerline FRS
Figure C-11. Dam Failure Inundation Areas – Powerline FRS
Figure C-12. 100-year Floodplain Mapping with Dams In-Place
Figure C-13. 100-year Floodplain Mapping without Dams In-Place
USDA- NRCS January 2013
Kimley-Horn and Associates, Inc.