What This Source Covers
Hydrology linework for streams and drainage channels with feature codes and update-year fields.
This layer provides watercourse line context and pairs with hydrology areas, basins, and watersheds.
Why Someone Would Open This Page
This source appears on 206 of the 219 mapped place pages in the Allegheny County section, including 128 borough and township pages and 78 Pittsburgh neighborhood pages. That gives a quick sense of how broadly the layer is used across the county.
The example below is here to make the source concrete. Instead of talking about the layer in the abstract, the page shows what it actually looks like on the map.
Example Map
This page uses 017 – Hydrology Lines in Hays as the example area. Dense sources use a full selected place; lighter sources use the full sample area.
Live Example Map
Hydrology Lines
Hays / Environment / line sample
Full neighborhood hydrology-line sample.
Quick Facts
| Fact | Current value |
|---|---|
| Rows in the source | 26,720 |
| Main data fields | 5 |
| Total fields | 7 |
| Source system | PASDA AlleghenyCounty MapServer layer 3 |
| Map geometry | PASDA layer 3 |
| Mapped place pages using this source | 206 / 219 (94.1%) |
| Example area used here | Hays |
| Features drawn in this example | 152 |
Where You Will See It
| Place type | Coverage |
|---|---|
| All mapped place pages in the county section | 219 |
| Pages using this source | 206 (94.1%) |
| Borough and township pages | 128 / 129 |
| Pittsburgh neighborhood pages | 78 / 90 |
| Pages where the source is hidden | 13 |
For Technical Readers
- Source table:
[WPRDC PASDA].[017 - HydrologyLines] - Refresh procedure:
[WPRDC PASDA].[017 - Hydrology lines update] - Documentation map table:
[Allegheny].[WPRDC PASDA MAPS].[Documentation Map - 017 - Hydrology Lines] - Metadata timestamp: 2026-03-16T17:09:07.925Z
Field List
The table below lists the current columns in [WPRDC PASDA].[017 - HydrologyLines].
| # | Field | SQL type | Nullable | Role |
|---|---|---|---|---|
| 1 | OBJECTID |
nvarchar(4000) |
Yes | Attribute |
| 2 | FEATURECOD |
nvarchar(4000) |
Yes | Attribute |
| 3 | UPDATE_YEA |
nvarchar(4000) |
Yes | Attribute |
| 4 | SHAPE_Leng |
nvarchar(4000) |
Yes | Attribute |
| 5 | Shape_Length |
nvarchar(4000) |
Yes | Attribute |
| 6 | geometry_type |
nvarchar(200) |
Yes | Geometry storage |
| 7 | geometry_json |
nvarchar(max) |
Yes | Geometry storage |