{"help": "https://data.gov.au/data/api/3/action/help_show?name=package_show", "success": true, "result": {"archived": false, "author": "Geospatial and Data Services Manager", "author_email": null, "contact_point": "spatial.data@dwer.wa.gov.au", "creator_user_id": "c2fbbe4a-4ba0-4945-808b-67454605a4cf", "duplicate_score": 2, "geospatial_topic": [], "id": "e9dd813c-df3f-41ce-8cfc-0d4ad9231f30", "isopen": false, "license_id": "custom_active_acceptance", "license_title": "custom_active_acceptance", "maintainer": "Supervising Engineer, Flood Risk Science", "maintainer_email": "flood@dwer.wa.gov.au", "metadata_created": "2025-06-23T06:12:30.896805", "metadata_modified": "2026-04-10T15:34:38.482350", "name": "fpm-bridges", "notes": "The Department of Water and Environmental Regulation produces floodplain mapping of rivers and major watercourses and provides floodplain development advice to ensure that proposed floodplain development has adequate flood protection and does not impact on the existing flood regime of the area. \n\nThis advice is related to major river flooding only and other issues, such as stormwater drainage and environment and ecological considerations are not addressed.\n\nThis dataset comprises bridge polygons that are indicated as being either \u2018Wet\u2019 (overtopped), \u2018Dry\u2019 (not overtopped) or \u2018No Data\u2019 to describe their status during a particular flood event. The status indicates whether the bridge deck itself is overtopped and is not related to the road levels approaching the bridge.\n\nThey are listed as such in the following attribute tables:\n\nSTATUS_10 (1 in 10 (10%) AEP flood event)\nSTATUS_20 (1 in 20 (5%) AEP flood event)\nSTATUS_25 (1 in 25 (4%) AEP flood event)\nSTATUS_50 (1 in 50 (2%) AEP flood event)\nSTATUS_100 (1 in 100 (1%) AEP flood event)\nSTATUS_DFE (Designated flood event)\nSTATUS_200 (1 in 200 (0.5%) AEP flood event)\nSTATUS_500 (1 in 500 (0.2%) AEP flood event) \nSTATUS_MCC (Maximum channel capacity)\nSTATUS_PMF (Probable maximum flood event)\n\nNote: To see the full scope of the floodplain mapping, 12 dataset layers are required to be loaded in the following order:\n\nFLOODPLAIN DATASET LAYERS: \nFPM Flood Level Points (m AHD)\nFPM Flood Level Contours (m AHD)\nFPM 1 in 100 (1%) AEP Floodway and Flood Fringe Line\nFPM Extent of Flooding\nFPM Levee Banks\nFPM Location of Cross Sections\nFPM 1 in 100 (1%) AEP Floodplain Development Control Area\nFPM Map Index\nFPM Bridges\nFPM Special Development Condition Area\nFPM 1 in 100 (1%) AEP Floodway and Flood Fringe Area\nFPM Floodplain Area\n\nThe dataset covers the following areas:\n\n- \n\nAvon River - Toodyay to Beverley and Brookton Townsites.\n
\n- \n\nBandy Creek - Esperance Townsite.\n
\n- \n\nBlackwood River \u2013 Augusta, Bridgetown, Nannup and Boyup Brook Townsites.\n
\n- \n\nBow River - Bow Bridge Townsite.\n
\n- \n\nCapel River - Capel Townsite.\n
\n- \n\nCemetery Creek - Lake Grace Townsite.\n
\n- \n\nChapman River \u2013 Geraldton Townsite.\n
\n- \n\nCohn Creek - Merredin Townsite.\n
\n- \n\nCollie River - Collie Townsite.\n
\n- \n\nCorrigin Townsite.\n
\n- \n\nDenmark River \u2013 Denmark Townsite.\n
\n- \n\nFitzroy River \u2013 Fitzroy Crossing Townsite.\n
\n- \n\nFive Mile Brook - Bunbury Townsite.\n
\n- \n\nGascoyne River - Carnarvon Townsite and the Lower Gascoyne.\n
\n- \n\nGordon River \u2013 Tambellup Townsite.\n
\n- \n\nGreenough River \u2013 Indian Ocean to Walkaway.\n
\n- \n\nGribble Creek - Kalgoorlie Townsite.\n
\n- \n\nHarding River - Roebourne Townsite.\n
\n- \n\nIrwin River - Dongara Townsite.\n
\n- \n\nKatanning Townsite.\n
\n- \n\nLower Collie River, Brunswick River and Wellesley River - Greater Bunbury.\n
\n- \n\nMargaret River \u2013 Margaret River Townsite.\n
\n- \n\nPreston River - Boyanup and Donnybrook Townsites.\n
\n- \n\nSerpentine River, Peel, Birrega & Oaklands Drains, Murray River and the Peel Inlet / Harvey Estuary - Peel Inlet / Harvey Estuary to Pinjarra and south to the Darling Scarp (Murray River) and Peel Inlet / Harvey Estuary to Wellard (Peel Main Drain), east to South Western Highway (Serpentine River) and north to Wungong Brook (Birrega Drain).\n
\n- \n\nSwan River, Canning River and Tributaries: Perth - Fremantle to Walyunga National Park (Swan River) and Canning Bridge to Brookton Highway (Canning River). Tributaries include Bennett Brook, Blackadder Creek, Ellen Brook, Helena River, Henley Brook, Jane Brook, St Leonards Creek, Susannah Brook (Swan River) and Southern River/ Wungong Brook (Canning River).\n
\n- \n\nToby Inlet \u2013 Quindalup Townsite.\n
\n- \n\nTurkey Creek - Warmun Aboriginal Community.\n
\n- \n\nVasse-Wonnerup Estuaries, Broadwater and New River, Abba River, Buayanup Drain, Ludlow River, Sabina River, Vasse River and Vasse Diversion Drain - Busselton Townsite.\n
\n- \n\nWilliams River and Tributaries - Williams Townsite.\n
\n- \n\nWillyung Creek - Albany Townsite.\n
\n- \n\nYakamia Creek \u2013 Albany Townsite.\n
\n
\n\nFor further information on flooding and floodplain management in Western Australia please refer to our Water Facts publications: Flooding in Western Australia (Water facts 13) and Floodplain Management (Water facts 14).\n\nThis information is available at the following addresses:\nhttps://www.wa.gov.au/system/files/2022-11/Water-facts-14-Floodplain-management.pdf\nhttps://www.wa.gov.au/system/files/2022-11/Water-facts-14-Floodplain-management.pdf\n\nGlossary:\n\n- \n\nAnnual exceedance probability (AEP) - the likelihood of occurrence of a flood of a given size or larger in any one year; usually expressed as a percentage.\n
\n- \n\n1 in 100 AEP flood - this means that there is a 1 in 100 (or 1%) chance of a flow of this size or larger occurring in any one year. This flood has a 50% chance of being experienced at least once in a person's lifetime. The 1 in 100 AEP flood has been generally adopted in Australia and overseas as the basis for floodplain management planning.\n
\n- \n\nFloodplain - the portion of a river valley next to the river channel which is covered with water when the river overflows its banks during major river flows. The term also applies to land adjacent to estuaries which is subject to flooding.\n
\n- \n\nDesignated flood event (DFE) - used for planning purposes and is generally the 1 in 100 (1%) AEP \"designed\" flood event. However, a designated flood event could be based on an \"actual\" flood event (e.g. Moora 1999 flood event) or an alternative scenario (i.e. Yakamia Creek - 1 in 100 (1%) AEP flood event plus sea level rise).\n
\n- \n\nMaximum channel capacity (MCC) - the maximum flow that a waterway can contain before breaking out across the floodplain during a flood event. \n
\n- \n\nProbable maximum flood (PMF) - the largest flood that could conceivably occur at a particular location, resulting from probable maximum precipitation. The PMF defines the extent of flood-prone land. Generally, it is not physically or financially possible to provide general protection against this event.\n
\n- \n\nAustralian Height Datum (AHD) - is a geodetic datum for altitude measurement in Australia. It was adopted in 1971 by the National Mapping Council as the datum to which all vertical control for mapping is to be referred. The datum is based on the mean sea level (1966-1968) being assigned the value 0.000m on the Australian Height Datum (AHD) at 30 tide gauges around the coast of the Australian continent.\n
\n
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