EPA WATERS Line events

[ksonda]

See: https://www.epa.gov/waterdata/nhd-event-data-dictionary for the schema.
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NHD Event Data Dictionary | US EPA
The Reach Address Database (RAD) stores reach address information for each Water Program feature that has been linked to the underlying surface water features (streams, lakes, etc) in the National Hydrology Database (NHD) Plus dataset.
Sep 18th, 2015

12:56
I think if you open up the 303d feature table, you'll see a 1:many between permanent_identifier / source_featureid : reachcode in many cases.
12:56
That is the issue that gives me pause.
12:57
If we can index these using the downstream most reach in the 1:many to make it 1:1, then we have something to go forward with.