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USGS 7.5' topographic quadrangle map coverage of Allegheny County
Structures on pghbridges are indexed by USGS topo quad and UTM (Universal Transverse Mercator) grid. This map links to Structures Listed by Location.
Use table below for maps showing UTM grid for each topo quad.
Download higher resolution USGS maps from PASDA
Wider red lines are Interstate highways.
MAPS ON THIS SITE
The Overview Map plots structures within Allegheny County onto
ON-LINE MAP SERVERS
Pennsylvania Spatial Data Access
MapQuest digital maps
Windows Live Local
USGS 15' topo quad coverage of Allegheny County
Green labels (green outline) indicate 15 minute series used for historical (c1900) USGS topo quads;
Black labels (grey outline) indicate 7.5 minute series USGS topo quads.
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