Drainage Headwalls

This layer shows location of drainage headwalls within the Metropolitan Region and is provided for information only. A Headwall is defined as a retaining wall placed at the inlet or outlet of a stormwater pipe or culvert. It can be owned by Main Roads WA or others. Data dictionary: ─────────────────┬─────────────────┬──────┬───────────────────────────────────────────────────────────────────────────────── Field │Alias │Type │Description ─────────────────┼─────────────────┼──────┼───────────────────────────────────────────────────────────────────────────────── Headwall_No │Headwall No │String│“Road_No” & ”.“ & Unique Database Number e.g. H015.569 ─────────────────┼─────────────────┼──────┼───────────────────────────────────────────────────────────────────────────────── Asset_Owner │Asset Owner │String│Owner of the asset e.g. Main Roads ─────────────────┼─────────────────┼──────┼───────────────────────────────────────────────────────────────────────────────── Road_No │Road No │String│MRWA Road Number ─────────────────┼─────────────────┼──────┼───────────────────────────────────────────────────────────────────────────────── Data_Status │Data Status │String│Field survey verification e.g. Verified / Asset Captured via Desktop only ─────────────────┼─────────────────┼──────┼───────────────────────────────────────────────────────────────────────────────── Mapping_Comments │Mapping Comments │String│Any additional comments that relate to this pipe section including assumptions ─────────────────┼─────────────────┼──────┼───────────────────────────────────────────────────────────────────────────────── Confidence_Rating│Confidence Rating│String│A confidence level assigned based on the source data used to digitise the feature ─────────────────┴─────────────────┴──────┴───────────────────────────────────────────────────────────────────────────────── Disclaimer: 1. Please note that Main Roads WA drainage data is provided for information only and the data may be inaccurate, incomplete or out-of-date. Please use as a reference only and verification is to be undertaken on site. 2. Confidence Rating has been assigned to individual assets to provide an indication of the accuracy of the data. However please note that this is only an estimated rating which should be used as a reference only. 3. Asset Owner – Please note that Main Roads WA drainage data includes multiple organisations’ interface drainage and, as a result, the ‘Asset Owner’ attribute is only to be used as a reference only as it may be inaccurate and should not be referred to as the source of truth. 4. Asset Types: a. Interfacing Structures i. Note that the drainage data includes interface points between Main Roads WA drainage structures and structures owned by other asset owners. However not all assets owned by other asset owners have been included. Please seek clarification from the respective asset owners if required. b. Ghost Structure / Node i. Ghost Node Structure represents a physical structure where the asset type is not known and Ghost Node represents a node only that is not owned by Main Roads WA. Any assets owned by other organisations beyond a direct connection can be represented by the use of a Ghost Link. Note that you are accessing this data pursuant to a Creative Commons (Attribution) Licence which has a disclaimer of warranties and limitation of liability. You accept that the data provided pursuant to the Licence is subject to changes. Pursuant to section 3 of the Licence you are provided with the following notice to be included when you Share the Licenced Material: "The Commissioner of Main Roads is the creator and owner of the data and Licenced Material, which is accessed pursuant to a Creative Commons (Attribution) Licence, which has a disclaimer of warranties and limitation of liability." Creative Commons CC BY 4.0 [https://creativecommons.org/licenses/by/4.0/]