Add additional Layers

[esmyers]

• EPA AOC's
• HUC8 ?-- maybe use the boundaries Dave created for SPARROW
• Stream Hydrography

The following to be sent from Paul:

• Bedrock Geology
• Aquifers -- see https://dashboard.waterdata.usgs.gov/app/nwd/?region=lower48 --> Hydrology --> Aquifers. Data should be available as download here: https://water.usgs.gov/GIS/metadata/usgswrd/XML/aquifers_us.xml but need to find web services.

[esmyers]

• [x] U.S. Groundwater Aquifers: Fished this out of NWIS mapper for Principal Aquifers It also seems that the water dashboard uses them. Is this our only source for mappable principal aquifers? I don't know when this was last updated as it was created by Dave McCullough over 4 years ago by my best estimates. https://nwismapper.s3.amazonaws.com/sw_act/4/4/5.png

• [ ] Canada Groundwater Aquifers: (still looking) for something.

• [x] Surface water NHD stream hydrography: https://basemap.nationalmap.gov/arcgis/rest/services/USGSHydroCached/MapServer/

• [ ] HUC8 outlines for U.S side are not difficult to get, but would need a Canadian equivalent. Right now I only have what Dave Saad created for the Red-Assiniboine, but nothing for the Great Lakes.

• [x] EPA AOC's https://services.arcgis.com/cJ9YHowT8TU7DUyn/ArcGIS/rest/services/epa_areas_of_concern_glahf_viewlayer/FeatureServer/0

• [x] Bedrock Geology Canada: Basic bedrock https://geoappext.nrcan.gc.ca/arcgis/rest/services/MMS/GMRC_E/MapServer/

• [x] Geology U.S. https://mrdata.usgs.gov/geology/state/ Not sure if this is the best resource and the layer is lacking metadata so I'm not sure which layers are appropriate.