1909-13367 SRA referral response approved docs

The existing rail corridor has immunity in the above event.




                           Figure 9 – 1% AEP existing flood depths extract.
4.1.7   1 in 50 0 Y e ar E xi st i n g R e sult s (no bl oc k a ge)

The peak water level during the above event at reporting point 1 was 106.65m AHD. The peak water
level at point 2 is 105.43m AHD.

The peak flow at flow line 10 was 54.48m 3/s.


4.1.8   1 in 20 0 0 Y ea r Ex ist i ng Re su lts (no b lo ck ag e)

The peak water level during the above event at reporting point 1 was 106.73m AHD. The peak water
level at point 2 is 105.65m AHD.

The peak flow at flow line 10 was 59.32m 3/s.


4.1.9   PM P Ex ist ing R e su lt s ( no blo c ka ge)

The peak water level during the above event at reporting point 1 was 107.64m AHD. The peak water
level at point 2 is 106.69m AHD.

The peak flow at flow line 10 was 191.12m 3/s.
The 1 in 500 year, 1 in 2000 year and PMP events are provided as a method of determining the possible
extent of flooding in extreme cases and is not intended as a design event.




                                               Flood Study                                        25
S19-007                                 122 & 144 Myall St, Cooroy