File Geodatabase Feature Class
Feature class depicting primarily Group A water system boundaries for Island county. Some Group B systems are provided as well.
This layer shows water system areas and boundaries in Island County as of 2007. The source for each feature is listed in the attribute table. No updates have been done to this layer since 2007.
Many water systems in this layer intersect one another. Some of these intersections appear to be mapping errors. Other intersections appear to be large and significant. It is not always apparent where these intersections are just by looking at this layer alone. Because of the intersect issue, it is important to use this layer in conjunction with the layer called ‘watersystems2007_Intersect.’ The layer ‘watersystems2007_Intersect’ was created on 5/15/2015 by applying the Intersect Tool to this data layer.
This layer cannot be relied upon, by itself, to show the water system intersection areas. Only in conjunction with ‘watersystems2007_Intersect’ can water system boundaries, areas, and intersections be seen. Both layers are intended to work together. Neither presents a complete picture of the state of the systems and their intersections individually.
Because no updates have been done to this layer since 2007, it is planned to verify paper water system records against this digital layer, and update the digital layer accordingly. Any new water systems since 2007 are not shown here. Any water system expansions, contractions, or vacations since 2007 are not shown here.
This data set was developed through a grant from Ecology to the county to map places of use and water service boundaries for Group A water supply systems in Island County, Washington.
No updates have been done to this layer since 2007. Any new water systems since 2007 are not shown here. Any water system expansions, contractions, or vacations since 2007 are not shown here.
Many water systems in this layer intersect one another. Some of these intersections appear to be mapping errors. Other intersections appear to be large and significant. It is not always apparent where these intersections are just by looking at this layer alone. Because of the intersect issue, it is important to use this layer in conjunction with the layer called ‘watersystems2007_Intersect.’ The layer ‘watersystems2007_Intersect’ was created on 5/15/2015 by applying the Intersect Tool to this data layer.
This layer cannot be relied upon, by itself, to show the water system intersection areas. Only in conjunction with ‘watersystems2007_Intersect’ can water system boundaries, areas, and intersections be seen. Both layers are intended to work together. Neither presents a complete picture of the state of the systems and their intersections individually.
Publication date
This data set is the property of the Washington Department of Ecology (Ecology) and Island County (County) - Washington state, with full rights to limit or direct distribution. Only Ecology or County personnel or authorized contractors may obtain or use this dataset. This information may not be distributed for any purpose without prior authorization from Ecology or the County.
There may be discrepancies between the data in these electronic files and the drawings and documents they represent. Where such discrepancies exist, only the physical drawing or document can be relied on. GeoEngineers, Ecology and the County make no warranties regarding this file or the data it contains. In accepting or using this file, the user assumes all liability of the accuracy, utility or suitability for any purpose of any data it contains.
Attribute accuracy is 100%. Features without attribute data are intended to provide "holes" in service areas.
Data were generally snapped to Island county parcel boundaries. Topology was developed to check the completeness and accuracy of the overlay. Feature boundaries were all within 10 feet of parcels boundaries and the majority of boundaries were completely coincident.
At the time of this publication, Island county had 290 Group A water systems. 283 Group A and 11 Group B systems mapped for this project. Overlap of system boundaries did occur and could not be completely verified as to whether the overlap was legitimate or not.
Horizontal accuracy is as accurate as the parcel data. No information was availble for parcel data accuracy
Not applicable
A variety of sources were available for determining the boundaries of water systems. Based on advice from Island county staff, county resolutions were the most accurate and complete source of maps through the 1990s. If a water system wanted to change boundaries they were required to submit the change for county approval. The maps sometimes showed only those portions that changed while many detailed the entire service area. These features are identified in the attribute data.
A follow-up source to the resolutions was CAD information from a local engineer who worked on many of these systems. The CAD data generally were not referenced to a common spatial datum or projection but were quite detailed about system boundaries relative to parcels.
The next most available source were maps in files at the state Dept. of Health office in Kent, Washington. The bulk of features were digitized based on records available there. The maps generally showed parcels and thus was relatively simple to digitize along parcel boundaries.
The county supplied information on roughly 10 areas that had litlle information in the state's files.
After the areas were digitized the data set was dissolved on the PWSID (as single parts) to ensure multiple continuous features (primarily from resolution related work) appeared as single features.
Authorized and non-authorized users of this dataset acknowledge that Ecology, the County, and GeoEngineers, Inc. are idemnified and held harmless of all losses, claims, or other liabilities incurred from the use or misuse of this dataset.
The following map is intended to be used as a GUIDE. Island County is providing this information as a general geographic representation that should not be used for precise measurements or calculations. Some of the features on this map are not accurately depicted. Any user of this map assumes all responsibility for use and agrees to hold Island County harmless for any liability, damage, or loss incurred by use of this information. Specific questions should be directed to Island County's Department of Planning & Community Development at: (360) 679-7339
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