HISTORICAL FLOOD LEVELS

5.36 5.02 3.58 3.59 3.68 3.67 3.21 2.87 3.01 2.91 2.8 3.78 2.42 4.02 2.4 2.37 2.35 2.06 2.41 2.39 2.39 2.37 2.39 2.4 2.39 2.14 2.06 2.39 2.41 2.42 2.31 2.14 2.3 1.5 2.38 2.16 2.43 1.5 2.43 1.91 4.93 4.63 4.75 FIGURE 4B HISTORICAL FLOOD LEVELS NON CALIBRATION EVENTS Winding Creek Catchment Non Calibration Events 1930-1967 1975-1978 1981-1988 1991 Levels in m AHD 2.21 2.19 7.89 9 8.48 8.55 8.48 3.03 1.72 2.1 1.89 2.23 25.59 26.34 24.97 24.93 23.7 23.2 23.3 21.44 21.8 23.6 22.27 23.84 J:\Jobs\111010\Arcview\ArcMaps\Figure04B_HistoricAlFloodLevels_NonCalibration.mxd 0.83 1.3 1.42 1.39 1.38 1.38 1.36 1.36 1.42 1.35 1.31 1.24 0.67 8 0 0.5 1 1.5 1.22 Km 16.68 17.38 18.42 18.52 18.6

FIGURE 5 PHOTOGRAPHS OF CREEK SYSTEM Photo 1: Past the end of Gimbert St Photo 2: Pedestrian bridge at Elizabeth St looking south Photo 3: Bridge over creek at John St Photo 4: Pendlebury Rd Photo 5: Lachlan Rd, opposite John St Photo 6: Gorleston Tce Photo 7: Looking south under Munibung Rd Photo 8: Rail bridge near Sturt Rd J:\Jobs\111010\Working\Figure05_W WindingCreek_Photographs.pptx Photo 9: End of Sturt Rd, looking east Photo 10: Myall Rd Photo 11: Fern Valley Rd Photo 12: Wansbeck Valley Rd looking north towards Fern Valley Rd Photo 13: Alfred St Photo 14: Graham St looking north Photo 15: Frederick St bridge looking west Photo 16: Near Frederick St

4.5 J:\Jobs\111010\Hydrology\WATER_LEVELS.xlsx Barnsley Weir Cockle Creek Railway Bridge 4.0 3.5 3.0 Level (m AHD) L 2.5 2.0 1.5 0.5 FIGURE 6 WATER LEVEL GAUGE RECORDS

J:\Jobs\111010\Hydrology\WATER_LEVELS.xlsx 3.5 3.0 2.5 Railway Bridge Third St Seventh St CC East side Five Is Bridge 2007 1990 1981 1978 1975 1963 1962 1949 1930 Note: Only levels along main channel shown Railway Bridge gauge < June 2007 2.13 Level (m AHD) 2.0 1.5 Railway Bridge gauge < Feb 1990 1.26 0.5 Railway Bridge gauge < April 2001 0.71 0 500 1000 1500 2000 2500 3000 3500 4000 Chainage (m) from confluence With Winding Creek FIGURE 7A HISTORICAL PEAK HEIGHT RECORDS COCKLE CREEK

J:\Jobs\111010\Hydrology\WATER_LEVELS.xlsx 30 25 Hillsborough Rd Fifth St Newcastle St Myall Rd Harrison St Macquarie Rd Railway Bridge Wetland Weir Frederick St 2007 1990 1988 1981 1978 1977 1975 1967 1963 1949 Note: Only levels along main channel shown 20 Level (m AHD) 15 10 5 0 0 1000 2000 3000 4000 5000 6000 7000 8000 Chainage (m) from Hillsborough Road FIGURE 7B HISTORICAL PEAK HEIGHT RECORDS WINDING CREEK

Water Level (m) 4.5 4 3.5 3 2.5 2 1.5 THIS WAS DIGITISED FROM HWC WINDING CREEK HYDROLOGY NOVEMBER 1990 2 FEBRUARY 1990 Water Level (m) 1.8 1.6 1.4 1.2 0.8 0.6 THIS WAS DIGITISED FROM HWC WINDING CREEK BASIN ASSESSEMENT OCTOBER 2001 Fourth Street 10 APRIL 2001 Modelled 4.6 4.4 4.2 4.0 3.8 Barnsley Weir Cockle Creek Railway Bridge Marmong Point Modelled (CC_Rail) FIGURE 8 STAGE HYDROGRAPHS 7-9 JUNE 2007 1 Assumed Sturt Road 0.4 3.6 0.5 0 Modelled 0 50 100 150 200 250 300 Time (min) 0.2 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.0 2-4 FEBRUARY 1990 Water Level (m) 3.0 2.5 2.0 1.5 THIS WAS DIGITISED FROM HWC WINDING CREEK BASIN ASSESSEMENT OCTOBER 2001 Sturt Road 10 APRIL 2001 Modelled Level (m AHD) 2.8 2.6 2.4 2.2 2.0 1.8 0.5 1.8 1.6 1.6 J:\Jobs\111010\Hydrology\WATER_LEVELS.XLSX Level (m AHD) 1.4 1.2 0.8 0.6 0.4 0.2 Barnsley Weir Cockle Creek Railway Bridge Marmong Point Modelled (CC_Rail) Level (m AHD) 1.6 1.4 1.2 0.8 0.6 0.4 0.2 Barnsley Weir Cockle Creek Railway Bridge Modelled (CC_Rail) 10 APRIL 2001 1.4 1.2 0.8 0.6 0.4 0.2

FIGURE 9A PLUVIOMETER DATA FEBRUARY 1990, APRIL 2001, JUNE 2007 400 Barnsley (1990) Hunter Water (1990) R3 Cardiff (2001) R5 Charlestown (2001) R10 Lookout Res (2001) Barnsley (2007) 350 R7 Teralba (2007) R11 Swansea (2007) R14 Wallsend (2007) R38 Hamilton (2007) R39 Kotara (2007) TR99 (2007) TR100 Eleebana (2007) TR101 Valentine (2007) 300 TR102 Belmont (2007) TR103 Belmont (2007) TR104 Redhead (2007) TR105 Windale (2007) TR106 Dudley (2007) TR107 Swansea (2007) 250 Cumulative Rainfall (mm) 200 150 100 J:\Jobs\111010\Hydrology\Pluviometer_Data.xlsx 50 0 0 5 10 15 20 25 30 35 40 45 50 Time (Hours)

J:\Jobs\111010\Hydrology\WBNM\Model_SetUp_WC 100 Total Rainfall Depth (mm) 90 80 70 60 50 40 Dudley Kotara Teralba Eleebana Barnsley Design-100y (9h) Design-100y (2h) Design-500y (9h) Design-500y (2h) 30 20 10 0 Time FIGURE 9B RAINFALL HYETOGRAPHS

J:\Jobs\111010\Hydrology\1990_Pluvio\IFD_Bursts_MACRO_1990.xlsx 1000 100 100y ARI 50y ARI 20y ARI 10y ARI 5y ARI 2y ARI 1y ARI Intensity (mm/h) 10 1 Hunter Water (1990) Barnsley (1990) R3 Cardiff (2001) 30m 1hr 2hr 3hr 4.5hr 6hr 9hr 12hr 18hr 24hr 48hr 72hr Burst duration FIGURE 10 BURST INTENSITIES AND FREQUENCIES FEBRUARY 1990 AND APRIL 2001

J:\Jobs\111010\Hydrology\IFD_Bursts_MACRO_2007.xlsx 1000 100 500y ARI 200y ARI 100y ARI 50y ARI 20y ARI 10y ARI 5y ARI 2y ARI 1y ARI 2000y ARI 1000y ARI Intensity (mm/h) 10 1 Barnsley R7 Teralba R14 Wallsend R38 Hamilton R39 Kotara TR100 Eleebana TR101 Valentine TR105 Windale TR106 Dudley 30m 1hr 2hr 3hr 4.5hr 6hr 9hr 12hr 18hr 24hr 48hr 72hr Burst duration FIGURE 11 BURST INTENSITIES AND FREQUENCIES JUNE 2007

FIGURE 12 WBNM HYDROLOGIC MODEL LAYOUT Creeks Lower Cockle Creek Tributary Burkes Creek Tributary Cocked Hat Creek Tributary Cockle Creek Tributary Flaggy Creek Tributary Winding Creek Tributary WBNM Lag Parameter C 1.7 2.4 3 0 1 2 3 4 Km J:\Jobs\111010\Arcview\ArcMaps\Figure12_WBNMHydrologicModelLayout.mxd

FIGURE 13A COMPARISON OF PEAK LEVELS UPSTREAM WINDING CREEK JUNE 2007 16.56-0.55 16.84 16.76-0.29 16.71-0.1-0.14 17.3-0.72 16.72 0.1 16.8 4 16.95 0.35 17.8-0.49 17.26 5 18.13-0.13 17.77-0.22 18.41-0.4 17.26 16.95 5 0.35 17.8-0.49 17.77-0.22 17.61 0.15 18.13-0.13 18.41-0.4 18.59 19.11 0.12-0.66 19.07 19.32 7-0.1 19.3-5 19.11-0.66 19.07 7 18.59 0.12 20.74-0.16 20.67-6 Path: J:\Jobs\111010\Arcview\Calibration\ArcMaps\Figure13A_Winding_Creek_Upstream_Comparison_of_Peak_Levels_June2007_Ele.mxd Peak Flood Level (mahd) < 5 5-10 10-15 15-20 20-25 25-30 30-35 > 35 Observed Flood Level Difference Modelled v Recorded 16.84 17.37-0.29-0.81 16.71-0.14 0 125 250 500 750 1,000 m 16.76-0.1 17.3-0.72 16.72 0.1 16.8 17.45 4-0.61 16.9-6 22.65-0.33 22.71 22.33-0.38 0.4 23.23-0.23 22.2-0.18 24 1 24.9 24.84-0.32-0.1 24.88-7

FIGURE 13B COMPARISON OF PEAK LEVELS DOWNSTREAM WINDING CREEK JUNE 2007 5.05-0.16 5.2 4 Path: J:\Jobs\111010\Arcview\Calibration\ArcMaps\Figure13B_Winding_Creek_Downstream_Comparison_of_Peak_Levels_June2007_Ele.mxd Peak Flood Level (mahd) < 5 5-10 10-15 15-20 20-25 25-30 30-35 > 35 Observed Flood Level Difference Modelled v Recorded 12.12 0.12 0 125 250 500 750 1,000 m 12.87 0.41 13.06-0.4 13.13 0.3 13.18 0.21 13.99-0.4 13.81-0.26 13.88-0.42 13.13 0.3 14.12-0.17 13.78-9 13.09 13.11 0.34 0.37 13.17 0.82 13.26 0.53 8.53 0.22 9.44 9.58 8.81-3 6 9.73 0.2 9.52 0.19 8.93 0.13 0.12 9.67 0.23 9.45 0.19 9.49-0.11 11.48 0.3 11.85 0 11.57 0.22 12.2-0.31 12.12 0.12 12.87 0.41 13.06-0.4 14.12-0.17 13.78 13.13-9 0.3 13.09 13.18 0.34 0.21 13.11 0.37 13.13 0.3 13.17 0.82 14.33-0.18