First Base Solutions is a reseller of Conservation Authorities Moraine Coalition Oak Ridges Moraine data. The Oak Ridges Moraine groundwater management program has interpreted and built a digital geological framework and hydrogeologic understanding across the watershed areas draining from the Oak Ridges Moraine. The program has bundled the geological and hydrogeological layers from the program's different studies into several available packages.

Working with Earthfx Inc., program staff as well as partner agency staff, have been working on the construction and refinement of digital geological surfaces across large parts of the Oak Ridges Moraine and its drainage areas. For the first time, this exercise provides to the Toronto area consulting community a geological framework into which newly drilled boreholes can be set. This makes interpretation of drilling results more fruitful and can provide insights into the potential geological variability that might be encountered on any site being worked on.

At a "Regional Scale" the program has extended the known Quaternary stratigraphy, as recorded at various type sections or outcrops (e.g. Rouge River bluffs, Scarborough Bluffs, Woodbridge, etc.), as well as from the documented literature, northwards to cover a large portion of South Central Ontario. This regional geological interpretation has resulted in any of the following layers being available at different locations across the study area.

As part of the work to construct groundwater flow models, various hydrogeological layers are available. These layers can prove particularly insightful when groundwater investigations are undertaken. For example, the aquifer head maps provide estimates of groundwater flow direction (both modeled and estimated from static water levels), whereas the hydraulic conductivity layers provides an indication of potential targets for the citing of higher capacity wells. Estimates of groundwater recharge can provide support to various development projects.

This work covered an area from the base of the Niagara Escarpment stretching eastward to the Trent River; from Lake Ontario to the Lake Simcoe and the Kawartha Lakes area. The work built upon the Geological Survey of Canada's Oak Ridges Moraine work and consists of five main layers (Ground Surface, Oak Ridges Moraine, Newmarket Till, Lower Sediments (divided into an upper and lower half), and Bedrock). The Regional Model package provides "Top of" and "Isopach" and "Hydraulic Conductivity" of these layers, as well as the estimated "Recharge" and the groundwater flow model outputs of "Modelled Head" for the above layers, as well as "Drain Discharge". The layers were initially processed on a 240m x 240m grid and are provided here on a 250 grid spacing. Supporting documentation is found in CAMC/YPDT Technical Report 01-06 (see website). This work is considered to be "regional" in interpretation; in areas where both the Regional Model and Core Model surfaces are available it is recommended the Core Model surfaces be considered the better/updated interpretation of the two packages.

This work was done to provide a better understanding of the groundwater flow conditions primarily through York Region and the City of Toronto. The work extended the Regional model work and consisted of 8 main layers (Ground Surface, Recent or Late Stage Lacustrine/Fluvial, Halton/Kettleby, Oak Ridges Moraine, Tunnel Channel Silt Aquitard, Tunnel Channel Sand Aquifer, Newmarket Till, Thorncliffe, Sunnybrook, Scarborough and Bedrock). The Core Geology Package provides the "Top of" and "Isopach" for these layers. The Core Hydrogeological Package provides "Observed Head" (for the aquifers), estimated model "Recharge" and the groundwater flow model outputs of "Modelled Head" for the above layers, as well as "River Discharge" and Drain Discharge". The layers were processed on a 100m x 100m grid spacing. Supporting documentation is found in CAMC/YPDT Technical Report 01-06 (see website). This work is considered to be "regional" in interpretation; in areas where both the Regional Model and Core Model surfaces are available it is recommended the Core Model surfaces be considered the better/updated interpretation of the two packages.

This work was undertaken in 2006 and provides an extension to the geological layering interpretation that was undertaken for the Core Model. The extension includes both a westward expansion to incorporate areas of the Credit River Watershed above the Niagara Escarpment as well as an eastward extension to incorporate all of Durham Region. In areas where both the Expanded Geological surfaces and the Core Model surfaces are available, it is recommended the Expanded Geological surfaces be considered the better/updated interpretation of the two packages. Supporting documentation is found in CAMC/YPDT Technical Report 01-06 (see website).