As part of a Channel Migration Zone Study, GeoEngineers, Inc. was contracted by Pierce County, Public Works Surface Water Management formerly “Water Programs” Division to create a series of shapefiles including the SPC_Migration_Potential_Areas.shp. Pierce_Migration_Potential_Areas.shp combines the include severe, moderate or low migration potential areas. GeoEngineers, Inc. completed migration potential studies of the White, Puyallup and Carbon Rivers (completed 2003 adopted 2005), South Prairie Creek (completed 2005 adopted 2017) and Upper Nisqually River (completed 2007 adopted 2017). These were accepted by SWM and Adopted by County Council.The MPA delineation involved identifying severe, moderate and low migration potential areas within the delineated CMZ. The MPA delineation approach is similar to that employed in our CMZ analysis; that future rates and character of migration will be similar to those of the past for similar water discharges, sediment influx, and debris entrainment conditions. This analysis was also based on the absence of levees, revetments and other confining structures. The width of each MPA was measured, based on delineation criteria developed specifically for this project, and then adjusted to accommodate geomorphic conditions not accounted for in the maximum migration rates. Criteria developed for mapping severe, moderate and low MPA are provided in the following paragraphs: Severe MPA includes the area lying inside the HCOT, and an area immediately outside the HCOT boundary equivalent to a distance the channel could travel in a specified period. The extent of the Severe Migration Potential Area outside the HCOT boundary is determined by two criteria. The first criterion is the distance the outside channel edge could travel in 10 years of steady lateral migration away from the HCOT boundary (Maximum lateral migration rates multiplied by a ten- year period). The second is defined by the distance the outside channel edge could travel in storm single event (i.e. maximum overnight rate) from the current channel position (2002). The landward most boundary of the two criteria defines the Severe Migration Potential Area.Moderate MPA includes areas adjacent to the outside edge of the severe migration potential area. The width of the moderate migration potential area is determined by the distance the outside channel edge could travel in five years (for South Prairie Creek 10 years) of steady lateral migration beyond the outside edge of the severe migration potential area. The CMZ boundary will serve as the outside edge of the moderate migration potential boundary at sites where the distance between the severe migration potential boundary and the CMZ boundary represents less the five years (for South Prairie Creek 10 years)of steady lateral migration. Moderate migration potential areas are not included at sites where the outside edge of the severe migration potential area is determined by the location of the CMZ boundary. The rate of migration used in the calculation is the maximum average rate of migration for each geomorphic reach (measured as described above). In some places the width of the Moderate Migration Potential Area may be modified based on geologic interpretation, professional judgment. Low MPA includes areas adjacent to the outside edge of the moderate migration potential area. The extent of the Low Migration Potential Area beyond the moderate migration potential boundary will be determined by CMZ boundary, as determined by our CMZ evaluation. Low migration potential areas will not be included at sites where the outside edge of either a severe or moderate migration potential area is determined by the location of the CMZ boundary. The most common adjustments typically involved widening the moderate MPA to include ancient abandoned channel deemed capable of arresting main stem flow in an avulsion event. Other common Moderate MPA adjustments involved increasing or decreasing the base width to accommodate the following conditions; The presence of native erosion resistant bank materials, such as the Osceola Mudflow or local downstream or oblique direction of meander bend migration.

Please read metadata for additional information (https://matterhorn.co.pierce.wa.us/GISmetadata/pdbswm_regulated_cmz_floodway_all.html). Any data download constitutes acceptance of the Terms of Use (https://matterhorn.co.pierce.wa.us/Disclaimer/PierceCountyGISDataTermsofUs (pdf).

DATA LINKED FROM PIERCE COUNTY OPEN DATA PORTALSee the metadata and original layer hereAbstract:This polygon theme shows active and pending formal plat projects. The data also shows historical data on completed formal plat development projects. The polygons are derived from the Pierce County ATR tax parcel dataset. The attribute information is derived from the Planning and Public Works PALS+ permitting system. This dataset is part of a group development projects referred to as the development engineering development data. The group includes; commercial, formal plats, short plats, large lots, mobile home parks, and other landuse.Purpose:This dataset is used by Planning and Public Works - Development Engineering to track the progress of formal plat development projects and to provide historical references to completed projects in Unincorporated Pierce County.

The Pierce County Public Transportation Benefit Area (PTBA) boundary, updated October 1, 2012. Any data download constitutes acceptance of the Terms of Use.

The County’s National Pollutant Discharge Elimination System and State Waste Discharge General Permit (NPDES) permit requires that Pierce County maintain mapping data for all known MS4 outfalls and discharge points. The permit requires basin delineation for all tributary conveyances to all known outfalls and discharge points with a 24-inch nominal diameter or larger, or an equivalent cross-sectional area for non-pipe systems.In September 2016, Pierce County Department of Public Works (County) hired Herrera Environmental Consultants (Herrera) to delineate watershed and drainage basin boundaries in GIS to meet the mapping requirements of the current NPDES Phase I Municipal Stormwater Permit. In 2017, Herrera produced an amendment to the original SOW to assist the County with a) conducting a review of 570 existing mapped outfall and discharge points for accuracy and completeness and b)mapping all remaining outfall and discharge points within Pierce County (excluding cities).Herrera has produced a Technical Memorandum documenting all methods and results entitled “Pierce County Drainage Basin and Watershed Delineation Summary Memorandum” (dated December 28, 2017). Please read metadata for additional information (https://matterhorn.co.pierce.wa.us/GISmetadata/pdbswm_watersheds_hec.html). Any data download constitutes acceptance of the Terms of Use (https://matterhorn.co.pierce.wa.us/Disclaimer/PierceCountyGISDataTermsofUse.pdf).

DATA LINKED FROM PIERCE COUNTY OPEN DATA PORTALSee the metadata and original layer hereAbstract:This polygon theme shows active and pending short plat projects. The data also shows historical data on completed short plat development projects. The polygons are derived from the Pierce County ATR tax parcel dataset. The attribute information is derived from the Planning and Public Works PALS+ permitting system. This dataset is part of a group development projects referred to as the development engineering development data. The group includes; commercial, formal plats, short plats, large lots, mobile home parks, and other landuse.Purpose:This dataset is used by Planning and Public Works - Development Engineering to track the progress of short plat development projects and to provide historical references to completed projects in Unincorporated Pierce County.

GPS'd storm water flow barrier polyline features in unincorporated Pierce County. Includes public and private features except where private gates prevent access. Please read metadata (https://matterhorn.piercecountywa.gov/GISmetadata/pdbpubw_swopenchannelbarrier.html) for additional information. Any data download constitutes acceptance of the Terms of Use (https://matterhorn.piercecountywa.gov/Disclaimer/PierceCountyGISDataTermsofUse.pdf).

This data shows the location of water quality monitoring stations in Pierce County. Monitoring station collect various data that can be downloaded from Pierce County Public Works - Surface Water Management's Water Data Viewer website. The website's URL is https://waterquality.piercecountywa.org/. There an API for accessing and downloading the data. The API's URL is https://waterquality.piercecountywa.org/KiWIS/KiWIS?datasource=0&service=kisters&type=queryServices&request=getrequestinfo.Please read the metadata (https://matterhorn.piercecountywa.gov/GISmetadata/pdbswm_water_quality_monitoring_sites.html) for additional information. Any data download constitutes acceptance of the Terms of Use (https://matterhorn.piercecountywa.gov/disclaimer/PierceCountyGISDataTermsofUse.pdf).

Point locations of properties throughout Pierce County that allow public access on private property in return for a reduced property tax rate. Some restrictions to the public access may apply.Please read the metadata (https://matterhorn.piercecountywa.gov/GISmetadata/pdbplan_public_access.html) for additional information. Any data download constitutes acceptance of the Terms of Use (https://matterhorn.piercecountywa.gov/disclaimer/PierceCountyGISDataTermsofUse.pdf).

DATA LINKED FROM PIERCE COUNTY OPEN DATA PORTALSee the metadata and original layer hereThis data shows the polygons used in the public right-of-way data. Please read metadata (https://matterhorn.co.pierce.wa.us/GISmetadata/pdbparc_rightofway.html) for additional information. Any data download constitutes acceptance of the Terms of Use. (https://matterhorn.co.pierce.wa.us/Disclaimer/PierceCountyGISDataTermsofUse.pdf)

DATA LINKED FROM PIERCE COUNTY OPEN DATA PORTAL - filtered by Puyallup GIS.See the metadata and original layer hereAbstract:This theme shows the centroid of the school grounds in Pierce County. Public schools were verified using the Office of Superintendent of Public Instruction school district website: https://www.k12.wa.us/about-ospi/about-school-districts/websites-and-contact-info/ , which has a link to the district website. This data does not contain preschools which are available in Child Care Centers. Internet based schools that don't have a physical location are not included in this data.Colleges, Universities,Technical and private schools were verified using the schools website.Purpose:The school theme was created by the Pierce County GIS Department to identify the locations of Primary, Elementary, Intermediate, Middle, Alternative, Junior and Senior High Schools in Pierce County. These included both Public and Private Schools. This dataset also includes; Universities, Colleges, and Technical Colleges. This theme is intended to be used for various purposes, including: Public Safety, Emergency Response and Planning. All data was compiled from the corresponding school website.

This feature class was created from the original pd_beats.shp. The original was edited to accurately show a simplified workable solution of graphic representations of Puyallup Police Department Beats that are to be used in the county-wide 2015 South Sound 911 (SS911) system. Its purpose is purely for mapping and dispatching. One area is omitted because it is not necessary in the feature class. The omitted area is the Puyallup Courts. It is a building with PD services that are shared by the City of Milton. There is a small polygon over the courts property that is labeled as City of Milton within the SS911 data but not here. Contact the data originator for more details.

This polygon theme identifies areas in Pierce County that have been designated as current Reimbursement/Latecomers Agreement Areas. The purpose of a reimbursement agreement as stated in Chapter 13.05 (now repealed) is to allow the County to enter into reimbursement agreements with owners of real property for the installation of sewer facilities subject to future reimbursement by the County from the Owners Capital Facility Charge and connection charges received from property owners who did not contribute to the original cost of installing the facilities and who subsequently benefit from the installation by utilizing capacity in the sewer facilities. The purpose of the latecomers agreement as stated in Chapter 13.10 is to allow the County, pursuant to Chapter 35.91 RCW, to enter into Latecomers Agreements with a developer of real property for the installation of public sanitary sewer facilities. It is entirely within the County's sole discretion whether it elects to enter into Latecomers Agreements. In order for the County to execute a Latecomers Agreement, the County must be convinced that the eligibility requirements set forth in PCC 13.10.030 have been met and it is in the best interest of the County to enter into such an agreement so that the benefit to the County outweighs the cost to the County in entering into an agreement. The polygon areas are used to identify the properties that are subject to the terms of the Reimbursement/Latecomers Agreement. This was called "Reimbursement Agreement Areas" prior to June 20, 2007.File Name: reimburseareasFeature Class: reimareasPlease read metadata (https://matterhorn.piercecountywa.gov/GISmetadata/pdbsewr_reimbursement_agreement_areas.html) for additional information. Any use or data download constitutes acceptance of the Terms of Use (https://matterhorn.piercecountywa.gov/Disclaimer/PierceCountyGISDataTermsofUse.pdf).

DATA LINKED FROM PIERCE COUNTY OPEN DATA PORTALSee the metadata and original layer hereAbstract: This spatial data displays the locations of applications and permits that were reviewed and processed by Pierce County. It includes Building Permits, Development Engineering Permits, Environmental Permits, Fire Prevention Permits, Land Use Permits, and Sewer Permits. This data is extracted from the Planning and Public Works PALS Plus application. The permit points are placed using the XY coordinates from PALS Plus. Permits that have do not have XY coordinates in the PALS Plus application will not be in this spatial data. An example of this would be the parcel number associated with the application was not valid or did not exist in the Assessors-Treasurer’s system. Please read metadata (https://matterhorn.co.pierce.wa.us/GISmetadata/pdbplan_permits.html) for additional information. Any data download constitutes acceptance of the Terms of Use (https://matterhorn.co.pierce.wa.us/Disclaimer/PierceCountyGISDataTermsofUse.pdf). Terms of Use/Custom License: Please see provided hyperlinks for metadata and Terms of Use.Purpose: This spatial data displays permit locations in unincorporated Pierce County. Read full metadata for more information.

This data identifies the approximate location of the existing Pierce County sanitary sewer system owned, operated, and maintained by Pierce County Public Works and Utilities (Sewer and Water Utilities Division) and private sanitary sewer pipeline that connect into the Pierce County system.Please read the metadata (https://matterhorn.piercecountywa.gov/GISmetadata/pdbsewr_ssmainline.html) for additional information. Any data download constitutes acceptance of the Terms of Use (https://matterhorn.piercecountywa.gov/Disclaimer/PierceCountyGISDataTermsofUse.pdf).

DATA LINKED FROM PIERCE COUNTY OPEN DATA PORTALSee the metadata and original layer hereAbstract:This polygon theme shows "Group A" water systems for Pierce County and was completed in cooperation with the water purveyors. As required by state law and the Pierce County Coordinated Water System Plan (CWSP), water service areas are "exclusive service areas" which means that the water purveyor has the "first right of refusal" to provide water service within their approved individual service areas. The approval is documented through signed Standard Service Agreements (SSAs). This links to the DOH website.March 25, 2019 - The data was edited to match parcels and road centerlines where it made sense. This is regular editing that is completed.The data as of July 14, 2014 includes bundled service areas. Attributes have been edited as part of this change.Purpose:To show "Group A" water systems for Pierce County as required by state law and per the Pierce County CWSP. Water Purveyors will also be used in Public GIS per a request from the public.