Description: Water temperature monitoring sites are selected throughout the watershed. Some sites are only sampled at one point in time for subwatershed planning purposes and other are sampled on a yearly basis for long term trend analysis.
Description: This layer shows all active and historic monitoring stations within the LSRCA jusrisdiction. Various attributes describe identification, location, responsible agencies and function of the particular monitoring site.
Description: Point layer showing linkages between NHSRS core features, which are of importance within a subwatershed. Please refer to the Natural Heritage System and Restoration Strategy for information.
Description: Fish collection sites are selected throughout the watershed. Some sites are only sampled at one point in time for subwatershed planning purposes and other are sampled on a yearly basis for long term trend analysis.
Description: Benthic invertebrate collection sites are selected throughout the watershed. Some sites are only sampled at one point in time for subwatershed planning purposes and other are sampled on a yearly basis for long term trend analysis.
Description: Watercourses are defined as an identifiable depression in the ground in which a flow of water regularly or continuously occurs. Both natural and artificial channels comprise this network in the Lake Simcoe Protection Plan watershed.
Description: This cross section layer contains the most current cross section locations and floodplain elevations at a Regional Storm event throughout the watershed with the exception of Barrie creeks where no digital information is available. In selected cases the 1:100 year return period information is available. In general estimated cross-section information is available for Ramara, Oro and in isolated locations within Uxbridge and Brock. In general engineered cross-section information is available for York Region, Municipality of Durham, and in Innisfil and Bradford-West Gwillimbury of Simcoe County.
Description: This cross-section layer contains the most current cross section locations at all storm levels (2, 5, 10, 25, 50, 100 year and regional events) from hydraulic and hydrologic analysis and the related floodplain elevations. In general estimated cross-section information is available for Ramara, Oro and in isolated locations within Uxbridge and Brock. In general engineered cross-section information is available for York Region, Municipality of Durham, and in Innisfil and Bradford-West Gwillimbury of Simcoe County.
Description: A line layer showing regional linkages between NHSRS core features. Regional linkages highlight natural heritage connections between subwatersheds that are within 300 metres of each other. Connection have also been made between the NHSRS core and the Greater Golden Horseshoe Natural Heritage System. Please refer to the Natural Heritage System and Restoration Strategy for information.
Description: Line layer showing the location of recreational trails throughout the Lake Simcoe watershed, that are owned or managed by the Lake Simcoe Region Conservation Authority.
Description: The Emergency Management System (EMS) Vulnerable Line is an inundation product consisting of a polygon layer highlighting sections of roadway and/or railway infrastructure that are inundated or intersected by the EMS Flood Events. This inundation product should be used in conjunction with EMS Vulnerable Structures for any EMS planning discussion.
Description: Contours are linear features of the same elevation that represent the shape and elevation of the land showing in 25cm, 50cm, 1m and 5m intervals for the Lake Simcoe Watershed.Vertical datum: CGVD2013
Description: Contours are linear features of the same elevation that represent the shape and elevation of the land showing in 25cm, 50cm, 1m and 5m intervals for the Lake Simcoe Watershed.Vertical datum: CGVD2013
Description: Includes all wetlands available from the Ministry of Natural Resourcesand Forestry: evaluated Provincially Significant Wetlands (PSWs), other evaluated and identified wetlands and unevaluated wetlands. A 30m setback has been applied toall MNRF wetlands including evaluated, unevaluated, identified).
Description: A polygon layer outlining areas where Tier 3 water budgets were completed under the Clean Water Act. Source Protection Plan policies may apply within these areas.
Name: Vulnerability Score Area for Intake Protection Zones (VSA_SW)
Display Field: INTAKE_NAME
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: The vulnerability score ranks the relative vulnerability of the vulnerable area to contaminants. The Vulnerability Score is based on multiplying an Area Vulnerability Factor by a Source Vulnerability Factor.This is produced by the geospatial intersection of Vulnerable Area Zones and the Intrinsic Vulnerability.
Name: Significant Groundwater Recharge Area (SGRA)
Display Field: SUBWATERSHEDNAME
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: A polygon layer identifying areas within the Source Protection Region where the rate of groundwater recharge is more than 15% greater than the average recharge across the entire Source Protection Area. The Clean Water Act requires municipalities to identify these areas in their official plans.
Description: A polygon layer identifying areas where human activity may be contributing to poor water quality in a municipal well or surface water intake.
Description: The land surfaces that do not allow water to easily penetrate or be absorbed. A polygon feature class that presents the percentage of the impervious surfaces within the total areas of each zone of the wellhead protection area (WHPA) and intake protection zone (IPZ), where road salt is applied and could be a potential drinking water threat.
Description: A polygon layer identifying shallow aquifers with high groundwater vulnerability (as defined following the Director Technical Rules for Assessment Reports under the Clean Water Act.
Description: Subwatersheds derived from the 2002 DTM data for the Lake Simcoe watershed. Subwatershed boundaries for Lake Simcoe that is within the LSRCA jurisdiction and include Upper Talbot subwatershed.
Description: Defined as an analogy to the concept of natural watershed, which refers to an area draining to a single point in a stream network, sewersheds are determined by curbs, storm drains, settling basins, pipes, and outfalls to streams. Often storm sewers or the collecting curbs and drains cross the boundaries of the watersheds that existed before urbanization.
Description: Riverine Erosion Hazards due to stream bank erosion and slope stability. Hazard areas contain a 15 m setback. This layer is one of the 5 components which comprise Ontario Regulation 179/06.
Name: Special Policy Area - Community of Schomberg
Display Field: SPA_NAME
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: A Special Policy Area (SPA) was established for the Community of Schomberg, Township of King in accordance with provincial flood plain policy. In general, the SPA provides a means to deal with land use proposals within the Community as it relates to the existing flood plain. This GIS layer shows the extent of the SPA within Schomberg as established in the local Official Plan.
Description: The Ontario Regulation Limit 41/24 is mapped as the greatest extent of the Riverine Hazard Limit (Flood Plain/Meanderbelt/Slope/Apparent Valley with a 15m setback), the Shoreline Hazard Limit (shoreline flood hazard/shoreline erosion hazard with a 15m setback), and Wetlands (with a 30m setback from all MNRF wetlands including evaluated, unevaluated, identified). These components have been dissolved to create an ‘all in one’ polygon showing the greatest extent of the regulation limit within the LSRCA Scientific watershed boundary. Refer to “Reference Manual for Determination of Regulation Limits” (LSRCA, November 2005) for more information on determining the extent of the identified hazards.
Description: The Ontario Regulation Limit 41/24 is mapped as the greatest extent of the Riverine Hazard Limit (Flood Plain/Meanderbelt/Slope/Apparent Valley with a 15m setback), the Shoreline Hazard Limit (shoreline flood hazard/shoreline erosion hazard with a 15m setback), and Wetlands (with a 30m setback from all MNRF wetlands including evaluated, unevaluated, identified). These components have been dissolved to create an ‘all in one’ polygon showing the greatest extent of the regulation limit within the LSRCA Scientific watershed boundary. Refer to “Reference Manual for Determination of Regulation Limits” (LSRCA, November 2005) for more information on determining the extent of the identified hazards.
Description: This layer contains areas that have been labeled as grasslands by using landcover codes NAG, CUM, ALO, TPO and patch size criteria of > 50 ha and >100 ha. Please refer to the Natural Heritage System and Restoration Strategy for information.
Name: NHSRS - Enhancement Opportunities in Floodplain
Display Field: DB2GSE.ST_Area(SHAPE)
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: Enhancement Opportunities in the Floodplain are areas that fall within the current floodplain boundaries and are adjacent to the core NHS features. These areas consist of old fields, estate lots, and agricultural lands, and fall within the landcover codes IAG, NAG, MOS and NH. Please refer to the Natural Heritage System and Restoration Strategy for information.
Description: Natural Heritage restoration and protection opportunities outside of NHSRS core; along a 125 metre buffer on both sides of the main watercourses branches of each subwatershed. Only landcover codes AA, IAG, MOS, NH, and NAG were captured. This excludes buildings and does not extend beyond roads and railways. This layer identifies target areas for restoration. Please refer to the Natural Heritage System and Restoration Strategy for information.
Description: A polygon network spanning across the Lake Simcoe watershed containing natural heritage features that have been identified as critical to the NHS whose protection and longevity are imperative to ecosystem functions and services of the Lake Simcoe watershed. The criteria for these core feature are laid out in the NHSRS document however includes features such as significant woodland, wetlands, natural areas abutting Lake Simcoe, fish habitat and watercourses, and significant valleylands. Please refer to the Natural Heritage System and Restoration Strategy for information.
Description: A 30 m buffer was applied to the boundaries of core features except watercourses, fish habitat and shoreline where the riparian area was considered a setback to the features.
Description: Model of roadside areas in the Lake Simcoe watershed where wildlife-vehicle collisions are more likely to occur.Hotspots are areas within 200m of a road or railway where wildlife road mortality is likely to occur.
Description: Polygon layer for conservation landholdings. This includes property that is owned and/or managed by LSRCA. This layer is appropriate for Public Release.
Name: Ecologically Significant Groundwater Recharge Area (ESGRA)
Display Field: SUBWATERSHEDNAME
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: A polygon layer that identifies groundwater recharge areas, where the groundwater discharges to local watercourses or wetlands. Certain policies in the Lake Simcoe Protection Plan apply in these areas.
Description: The purpose of this layer is to help guide infiltration based Low Impact Development (LID) placement within the East Holland River Subwatershed by ranking the subwatershed based on its suitability for infiltration. This layer was developed from interpretations of two input criteria; Ontario Geologic Survey (OGS) surficial geology enhanced by local interpretations (GeolRank attribute field), and depth to water table (WLRank attribute field). Infiltration based LID ranking information is stored in the FinalRank field.
Description: The Lake Simcoe Watershed landcover layer was created to produce a seamless cover for the watershed depicting current land cover using the best available data. The polygons are interpreted using 2018 orthophotography and assigned a land use code, natural heritage land uses are then further attributed based on the Ecological Land Classification (ELC). Non natural heritage features are further attributed with surface type.
Description: The Lake Simcoe Watershed landcover layer was created to produce a seamless cover for the watershed depicting current land cover using the best available data. The polygons are interpreted using 2013 orthophotography and assigned a land use code, natural heritage land uses are then further attributed based on the Ecological Land Classification (ELC).
Description: The Lake Simcoe Watershed landcover layer was created to produce a seamless cover for the watershed depicting current land cover using the best available data. The polygons are interpreted using orthophotography and assigned a land use code, natural heritage land uses are then further attributed based on the Ecological Land Classification (ELC). This layer represents 2008 Landcover data for the LSRCA Watershed.
Description: The Lake Simcoe Watershed landcover layer was created to produce a seamless cover for the watershed depicting current land cover using the best available data. The polygons are interpreted using orthophotography and assigned a land use code, natural heritage land uses are then further attributed based on the Ecological Land Classification (ELC). This layer represents 2002 Landcover data for the LSRCA Watershed.
Description: The Lake Shoreline Marina layer is a polygon feature created from a 15m buffer from lines delineating marinas visible in the 2022 aerial imagery.
Description: The Lake Shoreline Hazard Limit is a combination of 2 datasets: 1) 15m buffer of the line layer identifying the shoreline marinas, 2) 15m buffer applied to the merged flood hazard and erosion hazard polygon layers. The final output clips the combination to the Lake Simcoe boundary.
Description: This layer is a polygon feature showing the delineation of the Lake Simcoe Shoreline Flood Hazard. It shows the extent of the flood hazard around the shoreline of Lake Simcoe extending landward. In the event of a discrepancy between this delineation and the text of the applicable regulation, the text of the applicable regulation shall prevail. These elevations and dataset are based in CGVD28.
Description: This layer is a polygon feature showing the delineation of the Lake Simcoe Shoreline Erosion Hazard. It shows the extent of the erosion hazard around the shoreline of Lake Simcoe extending landward. In the event of a discrepancy between this delineation and the text of the applicable regulation, the text of the applicable regulation shall prevail. These elevations and dataset are based in CGVD28.
Description: Aquatic plant biomass in Lake Simcoe, 2018. Layer displays interpolation analysis of total dry weight biomass (grams per square metre) of aquatic plants in Lake Simcoe.
Description: Aquatic plant biomass in Lake Simcoe, 2013. Layer displays interpolation analysis of total dry weight biomass (grams per square metre) of aquatic plants in Lake Simcoe.
Description: Aquatic plant biomass in Lake Simcoe, 2008. Layer displays interpolation analysis of total dry weight biomass (grams per square metre) of aquatic plants in Lake Simcoe.
Description: The Emergency Management System (EMS) Vulnerable Structure layer is an inundation product consisting of a polygon layer and data, highlighting separate critical and building infrastructure that are inundated or intersected by the EMS Flood Events. This inundation product should be used in conjunction with EMS Vulnerable Line for any EMS planning discussion.
Description: This Emergency Management System (EMS) layer contains both riverine and Lake based floodplain delineations. The storm event levels (5, 10, 25, 50, 100 year and regional) riverine floodplain delineations are based on existing hydraulic and hydrologic analysis. In general, engineered riverine floodplain is available for York Region, Municipality of Durham, and in Innisfil and Bradford-West Gwillimbury of Simcoe County. In general, estimated riverine floodplain is available for Ramara, Oro and in isolated locations within Uxbridge and Brock. The storm event levels (5 and 100 year) for Lake based floodplain, are based on existing coastal engineering analaysis.
Description: The Lake Simcoe Watershed landcover layer was created to produce a seamless cover for the watershed depicting current land cover using the best available data. The polygons are interpreted using 2023 orthophotography and assigned a land use code, natural heritage land uses are then further attributed based on the Ecological Land Classification (ELC). Non natural heritage features are further attributed with surface type.
Description: This data is open data. By using this data, the user agrees the Information is licensed “as is” and the Authority excludes all representations, warranties, obligations and liabilities whether express or implied, in relation to the Information.The Authority is not liable for any errors or omissions in the Information and will not, under any circumstances, be liable for any direct, indirect, special, incidental, consequential, or other loss, injury or damage caused by its Use, even if specifically advised of the possibility of such loss, injury or damage.You shall indemnify and save harmless the Authority, its directors and officers, its representatives and employees (collectively, the “Indemnitee”) from and against any and all liabilities, damages, costs or expenses awarded against or incurred or suffered by the Indemnitee arising out of any action or proceeding commenced or maintained by any entity in respect of Your Use of the Information.The floodplain layer is separated into seven categories including: Engineered, Semi-Engineered, Estimated, and Approximated for floodplains and Spill, Spill-Undefined, and Spill-Delineated for spills. The shapefile has been dissolved based on floodplain type. The floodplain delineation is based on the applicable flood evet standard as per Regulation 41/24. The floodplain delineation presented is also known as the regulatory floodplain.Please follow-up with the Development, Engineering & Restoration and Flood Management Departments to confirm any additional requirements to support submissions with an impacts on the floodplain.
Description: This data is open data. By using this data, the user agrees the Information is licensed “as is” and the Authority excludes all representations, warranties, obligations and liabilities whether express or implied, in relation to the Information.The Authority is not liable for any errors or omissions in the Information and will not, under any circumstances, be liable for any direct, indirect, special, incidental, consequential, or other loss, injury or damage caused by its Use, even if specifically advised of the possibility of such loss, injury or damage.You shall indemnify and save harmless the Authority, its directors and officers, its representatives and employees (collectively, the “Indemnitee”) from and against any and all liabilities, damages, costs or expenses awarded against or incurred or suffered by the Indemnitee arising out of any action or proceeding commenced or maintained by any entity in respect of Your Use of the Information.A 15m setback has been applied to the floodplain delineation across the LSRCA watershed. The setback applies to both engineered and estimated floodplain delineations.