The information submitted is in accordance with NYSDEC's guidance, "Outfall and System Mapping For Illicit Discharge Detection and Elimination (IDDE) in NY (August 2005). Most outfalls were mapped using Trimble GeoXT GPS units, capable of sub-meter accuracy, with either post-processing or real-time corrections. NYS Department of Transportation record plans were used to determine outfall locations when they occurred in closed systems or were inaccessible. All of NYSDOT mapped outfalls meet the NYSDEC 45-meter positional accuracy requirement as per 6 NYCRR Part 750. For further information, see Data Quality Positional Accuracy statement.

Attribute:Permit

9-digit DEC MS4 Permit# assigned to the NYS DOT.

Attribute:OutfallID

6-digit auto assigned number; it is a unique number within the dataset and serves as the outfall ID part of the sequence.

Attribute:DEC_11

11-digit DEC Hydrologic Unit Code

Attribute:NHD_SubBas

8-digit code assigned by USGS to a hydrologic drainage area.

Attribute:NHD_ReachC

6-digit code assigned by the USGS to a stream segment or body of water that will receive outfall discharge.