{"help": "https://data.gov.au/data/en/api/3/action/help_show?name=package_show", "success": true, "result": {"archived": false, "author": "Northern Beaches Council", "author_email": null, "contact_point": "manly@northernbeaches.nsw.gov.au", "creator_user_id": "c2fbbe4a-4ba0-4945-808b-67454605a4cf", "duplicate_score": 2, "geospatial_topic": [], "id": "7acdfd22-3a43-4898-882a-a635b696443c", "isopen": false, "license_id": "cc-by", "license_title": "Creative Commons Attribution 3.0 Australia", "license_url": "http://creativecommons.org/licenses/by/3.0/au/", "maintainer": null, "maintainer_email": null, "metadata_created": "2026-01-21T18:10:43.180684", "metadata_modified": "2026-01-21T18:10:49.567200", "name": "nsw-fdp-great-mackerel-beach-floodplain-risk-management-study-plan-report", "notes": "Study area\n\nAs previously mentioned, Great Mackerel Beach (Figure 1) is a small coastal community on the western shore of Pittwater. The entrance system at Great Mackerel Beach is termed an ICOLL (Intermittent Open and Closed Lake and Lagoon) as the entrance to the lagoon is periodically closed. Only a small portion of the catchment in the lower valley has been developed. The community consists of only three streets (with approximately 130 properties) and no vehicular traffic. Ross Smith Parade is in the form of a footpath along the Pittwater foreshore, while Monash Avenue and Diggers Crescent are wide grassed areas that provide access to properties.\n\nThe upper catchment of Great Mackerel Creek is characterised by steep slopes with an incised creek valley, which changes to a flat floodplain area prior to the outlet into Pittwater. Great Mackerel Beach (approximately 650 m long and crescent shaped) is enclosed between two high headlands. The main flow path through Great Mackerel Beach is Great Mackerel Creek itself, which discharges into Pittwater via a berm at the northern end of the beach (Photos 1 and 2). The creek forms a small lagoon at the northern end of the beach (Photo 3), fed by an intermittent stream which rises to the plateau of the Lambert Peninsula. The lagoon is often open to tidal action and supports a shallow nearshore sandbar (or delta). The state of the entrance (whether open or closed) during a flood plays a significant part in the resulting flood levels. A brief overview of the history of the entrance is provided in Section 4.3.2.\n\nThe study area covers only those areas in the community affected by mainstream flooding (Figure 3). This includes 116 houses (on 120 residential lots) which have some flood-affectation in a Probable Maximum Flood (PMF).\n\nReport\n\nThe report contains study area, proposed measures in order of priority, the community consultation process, the existing flood environment, the cost of flooding, floodplain risk management measures as will as climate change implications and adaptive strategies.", "num_resources": 1, "num_tags": 1, "organization": {"id": "944317c5-4cd7-4f5d-afdf-3f24da0c35f7", "name": "northern-beaches-council-datansw", "title": "Northern Beaches Council", "type": "organization", "description": "The Northern Beaches Council is a recent LGA on Sydney's northern beaches formed from the merger of Manly, Pittwater and Warringah councils. \r\n\r\nhttp://www.northernbeaches.nsw.gov.au/\r\n\r\nFlood Studies, Plans and Maps available:\r\nhttp://www.pittwater.nsw.gov.au/property/natural_hazards/flooding/where_does_it_flood/flood_studies_and_plans\r\n\r\nCareel Creek\r\nAvalon to Palm Beach Flood Risk Management Study and Plan - current project.\r\nCareel Creek Catchment Flood Study - July 2013\r\nCareel Creek Floodplain Risk Management Plan November 2002 \r\nCareel Creek Floodplain Management Study Sept 2000 \r\nCareel Creek Drainage Catchment Flood Study June 1999 - superseded\r\n\r\nGreat Mackerel Beach\r\nGreat Mackerel Beach Floodplain Risk Management Study and Plan - November 2010\r\nGreat Mackerel Beach Flood Study September 2005\r\n\r\nMona Vale/Bayview\r\nMcCarrs Creek, Mona Vale and Bayview Flood Study - current project\r\nMona Vale - Bayview Flood Study May 2002\r\n\r\nNarrabeen Lagoon\r\nNarrabeen Lagoon Flood Study - September 2013\r\nNarrabeen Lagoon Floodplain Risk Management Plan Vol 1 Pittwater December 2002\r\nNarrabeen Lagoon Floodplain Management Study 1992\r\n\r\nNareen Creek (subcatchment of Narrabeen Lagoon)\r\nNareen Creek Flood Study September 2005 - superseded\r\n\r\nWarriewood Valley (subcatchment of Narrabeen Lagoon)\r\nWarriewood Valley Flood Study April 2005 - superseded\r\nWarriewood Valley Flood Study Addendum 1 July 2005 - superseded\r\nWarriewood Valley Urban Land Release Water Management  Specification - February 2001\r\n\r\nNewport\r\nNewport Beach Floodplain Risk Management Study & Plan February 2004\r\nNewport Beach Flood Study March 2002\r\n\r\nOther Areas\r\nPittwater Overland Flow Mapping and Flood Study - October 2013\r\nMcCarrs Creek, Mona Vale and Bayview Flood Study - current project\r\nAvalon to Palm Beach Flood Risk Management Study and Plan - current project\r\n", "image_url": "", "created": "2025-06-24T03:44:34.804318", "is_organization": true, "approval_status": "approved", "state": "active"}, "original_harvest_source": {"site_url": "https://data.nsw.gov.au/data/", "href": "https://data.nsw.gov.au/data/dataset/nsw-fdp-great-mackerel-beach-floodplain-risk-management-study-plan-report", "title": "DataNSW"}, "original_name": "nsw-fdp-great-mackerel-beach-floodplain-risk-management-study-plan-report", "owner_org": "944317c5-4cd7-4f5d-afdf-3f24da0c35f7", "private": false, "promotion_level": "0", "remote_last_updated": "2026-01-15 00:49:22.076812", "spatial": "{\"type\": \"Point\",\"coordinates\": [147.0179,-32.1618]}", "spatial_coverage": "New South Wales (NSW81093)", "state": "active", "temporal_coverage_from": "2025-12-17 05:38:08.058244", "temporal_coverage_to": "2010-11-01 00:00:00", "title": "Great Mackerel Beach Floodplain Risk Management Study & Plan", "type": "dataset", "unpublished": false, "url": null, "version": null, "extras": [{"key": "harvest_object_id", "value": "395e4aa6-3f68-44d6-a9c7-42822c736482"}, {"key": "harvest_source_id", "value": "9ebac586-8e51-4904-9f6c-d9b79726659a"}, {"key": "harvest_source_title", "value": "DataNSW"}], "resources": [{"cache_last_updated": null, "cache_url": null, "created": "2026-01-15T00:49:22.106392", "datastore_active": false, "datastore_contains_all_records_of_source_file": false, "format": "HTML", "hash": "", "id": "a3c854f6-fd2c-487a-adbd-d81f1781af4f", "last_modified": null, "metadata_modified": "2026-01-21T18:10:43.178456", "mimetype": null, "mimetype_inner": null, "name": "Great Mackerel Beach - Floodplain Risk Management Study & Plan", "package_id": "7acdfd22-3a43-4898-882a-a635b696443c", "position": 0, "resource_type": null, "size": null, "state": "active", "url": "https://flooddata.ses.nsw.gov.au/dataset/e4e90b2f-3a9d-4a3d-addd-5452206a2105/resource/f2aada56-eaed-491a-b07d-e4bc0ea298fe", "url_type": null, "zip_extract": false}], "tags": [{"display_name": "Great Mackerel Beach", "id": "522c04b7-20d5-43d0-9d7c-a7d65107f694", "name": "Great Mackerel Beach", "state": "active", "vocabulary_id": null}], "groups": [], "relationships_as_subject": [], "relationships_as_object": []}}