20200114 13044400 1.0 FALSE V_LID_SUITABILITY 002 59.551 617469.500100 640654.500000 4868555.000000 4898057.538800 1 Projected GCS_North_American_1983 Linear Unit: Meter (1.000000) NAD_1983_UTM_Zone_17N <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.7'><WKT>PROJCS[&quot;NAD_1983_UTM_Zone_17N&quot;,GEOGCS[&quot;GCS_North_American_1983&quot;,DATUM[&quot;D_North_American_1983&quot;,SPHEROID[&quot;GRS_1980&quot;,6378137.0,298.257222101]],PRIMEM[&quot;Greenwich&quot;,0.0],UNIT[&quot;Degree&quot;,0.0174532925199433]],PROJECTION[&quot;Transverse_Mercator&quot;],PARAMETER[&quot;False_Easting&quot;,500000.0],PARAMETER[&quot;False_Northing&quot;,0.0],PARAMETER[&quot;Central_Meridian&quot;,-81.0],PARAMETER[&quot;Scale_Factor&quot;,0.9996],PARAMETER[&quot;Latitude_Of_Origin&quot;,0.0],UNIT[&quot;Meter&quot;,1.0],AUTHORITY[&quot;EPSG&quot;,26917]]</WKT><XOrigin>-5120900</XOrigin><YOrigin>-9998100</YOrigin><XYScale>10000</XYScale><ZOrigin>0</ZOrigin><ZScale>1</ZScale><MOrigin>0</MOrigin><MScale>1</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>26917</WKID><LatestWKID>26917</LatestWKID></ProjectedCoordinateSystem> 20240214 10102100 20240214 10102100 150000000 5000 FGDC FGDC CSDGM Metadata Version 6.2 (Build 9200) ; Esri ArcGIS 10.7.1.11595 LID Suitability LSRCA LSRCA Hydrogeologist 2020-01-14T12:00:00 withheld LSRCA Hydrogeologist 1 -79.535791 -79.239060 44.226280 43.956678 East Holland River Subwatershed <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>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.</SPAN></P><P><SPAN /></P></DIV></DIV></DIV> LID Suitability Hydrogeology Groundwater Shallow Subsurface Characterization Project open data © LAKE SIMCOE REGION CONSERVATION AUTHORITY, (insert current year). All Rights Reserved <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN><SPAN>Contains Information made available under </SPAN></SPAN><A href="https://www.lsrca.on.ca/Pages/GIS-Open-Data-Licence.aspx"><SPAN><SPAN>Lake Simcoe Region Conservation Authority Open Data Licence v1.0.</SPAN></SPAN></A></P><P><SPAN /></P></DIV></DIV></DIV> Infiltration based LID Ranking information is stored in the FinalRank field. A high ranking indicates locations considered to be highly suitable for infiltration, Medium identifies those slightly less suitable for infiltration. A low ranking identifies locations considered the lowest suitability and that require further investigation before selection. As a result, the final GIS layer could prove to be useful in prioritizing infiltration based LID placement in situations where multiple locations for LID placement are available. The GIS layer is meant as a first look to help evaluate possible locations for infiltration based LID retrofits and should be combined with further site investigations to confirm suitability. It is important to remember when utilizing and interpreting this layer that the analysis for determining infiltration based LID suitability does not consider the water quality of infiltrating water, the presence and influence of geologic fill throughout much of the subwatershed, or the land use and policies within the area; that the depth to water interpretation is based off an average approximate water level and therefore site specific water levels may vary up 1 to 2 m; and that areas ranked as low suitability are not necessarily unsuitable for infiltration based LID implementation but instead are areas where further, site-specific investigations should be made before infiltration project commence. It is also important to note that those locations identified as lower suitability only considered the suitability for infiltration based LID practices and that LID provides a wide range of practices that can help offset various negative impacts of Urban Stormwater beyond reduced infiltration. Other LID practices could be highly suitable in many more locations than identified for infiltration based LID practices in this report. Further investigation into the suitability of a location should first start with a look at the attributes table, followed by site specific field investigations to confirm suitability. Since three different input criteria are considered in the final infiltration based LID location suitability layer it may be that only one of these input criteria are considered ‘unsuitable’ for infiltration and the other two are favourable. The only input criteria that may physically limit the ability to implement an LID project is the depth to water table, as shallow water levels (< 1 mbgs) are much more difficult to offset through design considerations than geologic and land use / policy limitations. In order to determine which input criteria is the limiting factor, data in the attribute table can be reviewed. The attribute field called ‘LimitFactr’ identifies the criteria(s) that are considered the limiting factor. In addition, each input criteria has an attribute field that indicates the infiltration based LID suitability / ranking based purely on that criteria alone. The geology suitability / ranking can be found under the GeolRank field while the depth to water table suitability / ranking can be found under the WLRank field. Each of these fields indicates the suitability for infiltration based LID implementation. The attribute fields also provide information on the presence or absence of a waterbodies, aggregate pits, flood plains, wetlands, ESGRA / SGRA, issue contributing areas (ICA), or expected growth locations. This information is often useful to the user to identify locations that are clearly suitable or unsuitable locations for infiltration based LIDs based on other factors not considered in the final ranking. In addition, these attribute fields indicate the current land use categorization, the water level depth range, and the surficial geology. Descriptions of the attribute fields can be found in the final report. Before using the final layer to help guide selection of a site for an infiltration based LID project it is important to remember that this GIS layer is meant as a guide and a ‘first-look’ at possible locations for infiltration based LID retrofits and requires confirmation through in-situ field investigations. Further, the final report outlines limitations and assumptions of the methodology and analysis, which includes limitations such as; water quality, which was not considered when ranking the subwatershed for infiltration; the depth to water estimates are long term averages and may not represent the season high at a site; and geologic interpretations do not consider the presence or influence of possible fill materials. Further details about the development of this layer can be found in the final report "LIDEastHollandSuitabilityReport2019.docx", which can be obtained upon request. Feature Class 59.551 dataset EPSG 6.13(3.0.1) 182100 Simple FALSE 182100 FALSE FALSE V_LID_SUITABILITY Feature Class 182100 OBJECTID OBJECTID OID 4 10 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. Shape SHAPE Geometry 4 0 0 Feature geometry. Esri Coordinates defining the features. Geology GEOLOGY String 50 0 0 General geologic description of the surficial geology from the OGS surficial mapping, with slight local adjustments made as outlined in the report and with no consideration for potential overlaying fill. GeolRank GEOLRANK String 50 0 0 Classification of the East Holland River subwatershed for infiltration based LID suitability (low, medium, high) based on the surficial geology WaterBody WATERBODY String 50 0 0 Identifies presence or absence of a waterbody. Aggregate AGGREGATE String 50 0 0 Identifies presence or absence of an aggregate pit. FLOODPLAIN FLOODPLAIN String 50 0 0 Identifies presence or absence of a floodplain. ICA ICA String 50 0 0 Absence or presence of issue contributing areas (ICAs) as identified in the South Georgian Lake Simcoe Source Water Protection Plan. LANDUSE LANDUSE String 50 0 0 Current land use categorization. UrbanGrwth URBANGRWTH String 50 0 0 Identifies presence or absence of expected growth locations. WLRank WLRANK String 50 0 0 Classification of the East Holland River subwatershed for infiltration based LID suitability (low, medium, high) based on the depth to water Wetlands WETLANDS String 50 0 0 Identifies presence or absence of a wetland. SGRA_ESGRA SGRA_ESGRA String 50 0 0 Presence or absence of significant groundwater recharge areas (SGRA) or ecologically significant groundwater recharge areas (ESGRA). WaterLevel WATERLEVEL String 50 0 0 Approximate range of the depth to water (mbgs) FinalRank FINALRANK String 50 0 0 Classification of the East Holland River subwatershed for infiltration based LID suitability (low, medium, high) based on all input criteria (geology, depth to water, and land use) LimitFactr LIMITFACTR String 50 0 0 Identifies the input criteria(s) (geology, water, or land) that is/are causing the FinalRank attribute to be that ranking. 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Depth to water data was obtained from the Oak Ridges Moraine Groundwater Program database, consulting reports from York Region and Lake Simcoe Region Conservation Authority (LSRCA), and water elevations from surface water features. Land use and policy information was obtained from existing LSRCA GIS layers of land use, regulated wetlands, floodplains, issue contributing areas (ICA), etc.