EXECUTIVE SUMMARY ..... 3
PROJECT DESCRIPTION ..... 1
PURPOSE AND NEED ..... 2
Location Hydraulic Study Purpose ..... 3
DRAINAGE CONDITIONS ..... 4
DESIGN CONSIDERATIONS ..... 5
Roadway Design Considerations ..... 5
Cross Drain Design Considerations ..... 6
EXISTING CONDITIONS ..... 8
Existing Cross Drains ..... 8
Existing Flooding ..... 10
Proposed Conditions Modeling ..... 16
Proposed Minimal Encroachment Evaluation ..... 19
CONCLUSIONS ..... 21
Figure 1 - Project Location Map ..... 1
Figure 2 – Proposed Typical Section of SR 72 ..... 5
Figure 3 - Proposed Typical Section of SR ..... 6
Figure 4- EX-0 (Existing 8'x 8' CBC) (12/18/2017) ..... 8
Figure 5 - EX-1 (Existing 4'x 5' CBC) (1/9/2018) ..... 9
Figure 6 - EX-2 (Existing 30-inch RCP) (12/18/2017) ..... 9
Figure 7 - EX-3 (Double 24-inch) (12/18/2017) ..... 10
Figure 8–Damage to SR 72 due to Hurricane Ian ..... 11
Figure 9 - Hurricane Ian Flooding of SR 70 and SR 72 ..... 11
Figure 10 - USGS Peace River Elevations for Monitoring Period ..... 13
Figure 11 - NEXRAD Rainfall Tiles ..... 14
Figure 12 - Unit Hydrograph Comparisons ..... 14
Figure 13 - Hurricane Ian Inundation Mapping Results ..... 15
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