Attachment 7 - Flood Impact Assessment - Covey · 132005.638.06

                                            Table 3-2 - Existing Hydraulic Structures
                                    Type              Upstream
                                                                  Downstream             Size
                                                        Invert                                  No. of
                        ID        C=circular                      Invert Level
                                                        Level                           (mm)    Pipes
                                 R=box culvert                      (m AHD)
                                                       (m AHD)
                       A01              C               15.464       15.262             600       1
                        B1              C               15.538       15.291             600       2
                        C1              C               15.526       15.394             600       1
                        E1              C               14.185       12.849             450       1
                        G1              C               13.393       13.363             500       1
                        G2              C               13.716       13.652             450       1
                        T1              C                20.05       19.86              600       1
                        T2              C               21.384       21.234             525       1
                        T3              C               18.722       18.572             900       2
                        T4              R                18.41       18.262        900 x 300      1
                        T5              C               18.033       17.883             375       1
                        T6              C               17.164       17.014             375       1
                        T7              C                15.15       14.993             375       1
                       T11              C                23.05       22.247             450       2
                       T12              C               23.156       23.589             500       1
                       T13              C                23.84       23.59              375       1
                        H1              R               16.798       16.735       1200 x 400      1
                        R1              C               13.419       13.382             500       1
                        R4              C               13.217       13.089             450       1
                       R41              C               13.645       13.513             450       1
                        R6              R               13.772       13.633             450       1
                        R9              C               14.381       14.28              430       1
                       R10              C               16.362       16.264             600       1
                       R11              C               15.732       15.102             600       1
                       R12              C               15.179       15.11              600       1
                       R13              C                19.34       19.331             650       1
                       R14              C               18.457       18.34              725       1
                       R15              C               17.769       17.679             750       1
                       R16              C               22.959       22.486             135       2
                       R23              C               13.391       12.878             375       1
                        Z1              C               12.932       12.568             450       4
                        Z2              C                12.07       12.005             375       2
                        Z3              C               12.932       12.568             525       2
                        Z4              C                14.01       14.001             500       2
                        P1              C               13.583       12.823             300       1
                        P3              C               13.922       13.594             300       1
                        P2              C               14.219       13.926             225       1
                        P4              C               13.998       13.62              150       1
                        P5              C                 13.6       13.309             300       1
                        P6              C               13.298       12.897             300       1



Flood Impact Assessment                                                                                  Page 13 of 25
Project No 244035 | Ref No M25-0479Rpt – Issue A – January 2026


[OCR of page images]
Table 3-2 - Existing Hydraulic Structures

600
600
600
450
500
450
600
525
900
900 x 300
375
375
375
450
500
375
1200 x 400
500
450
450
450
430
600
600
600
650
725
750
135
375
450
375
525!
500
300
300
225
150
300
300

Cc
Cc
Cc
Cc
Cc
Cc
Cc
Cc
Cc
R
Cc
Cc
Cc
Cc
Cc
Cc
R
Cc
Cc
Cc
R
Cc
Cc
Cc
Cc
Cc
Cc
Cc
Cc
Cc
Cc
Cc
Cc
Cc
Cc
Cc
Cc
Cc
Cc
Cc

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Flood Impact Assessment Page 13 of 25
Project No 244035 | Ref No M25-0479Rpt — Issue A — January 2026