Low clearance bridges in Montgomery County, Pennsylvania
25 spots where an interstate or US highway in Montgomery County has less than 16 ft of clearance, lowest first. The lowest is 14 ft 1 in on US-422 Alternate, Lower Pottsgrove 3139H02. 16 are under 15 ft.
Posted signs and your permit come first. These are the clearances Pennsylvania reported to the federal National Bridge Inventory in 2025. Repaving, snow and new work can lower them.
| Clearance | Where | Highway |
|---|---|---|
| 14 ft 1 in | Under Evergreen Road · Lower Pottsgrove 3139H02 · Map | US-422 Alternate |
| 14 ft 3 in | Under Dekalb Pike · K of P 34B1 / 3366G7 · Map | I-76 |
| 14 ft 3 in | Under 422 - Ramps K & L · U. Mer. TWP. 3366D05 · Map | US-422 |
| 14 ft 4 in | Under Weadley ROAD(T363) · Upper Merion TWP. 3367C08 · Map | I-76 |
| 14 ft 6 in | Under Township Line Road · Royersford 3140F09 · Map | US-422 |
| 14 ft 7 in | Under T-331 · East of Ft Wash Interchg. · Map | I-276 |
| 14 ft 7 in | Under Schuylkill Eway EB · City Line Interch 3479G09 · Map | US-1 |
| 14 ft 8 in | Under SR 3014 LR 46102 · Ft Washington State Park · Map | I-276 |
| 14 ft 8 in | Under Boro Line Road · Bridgeport 28H11 / 3367D5 · Map | US-202 |
| 14 ft 9 in | Under Gypsy LANE(T711) · 3MIE. King Prussia 3367E09 · Map | I-76 |
| 14 ft 9 in | Under Spring Garden Street · West Conshohocken 35E04 · Map | I-76 |
| 14 ft 9 in | Under Ramp B · K of Prussia 3366G07 · Map | I-76 |
| 14 ft 9 in | Under LR 46094 SR 2042 · South of Hatboro · Map | I-276 |
| 14 ft 9 in | Under County Line Road · South of Southampton · Map | I-276 |
| 14 ft 10 in | Under Plymouth Road · Just E.German PK. 29J09 · Map | I-276 |
| 14 ft 11 in | Under Ridge Pike · Southeast of Norristown · Map | I-276 |
| 15 ft 1 in | Under Ramp M 76W to 476S · Conshohocken INTER.35C05 · Map | I-76 |
| 15 ft 1 in | Under SR 2009 LR 46095 · Southeast of Hatboro · Map | I-276 |
| 15 ft 1 in | Under Pawlings Road · South of Oaks 3365H02 · Map | US-422 |
| 15 ft 3 in | Under SR 3053 Germant. PK · SR 3053 Germantown Pike · Map | I-276 |
| 15 ft 4 in | Under Pa Turnpike (Ramps A & B) · Willow Grove Interchange · Map | I-276 |
| 15 ft 5 in | Under Pa Turnpike Ramp N & O · Mid-County Interchange · Map | I-476 |
| 15 ft 7 in | Under Pa Turnpike Ramp Ab · Norristown Interchange · Map | I-276 |
| 15 ft 7 in | Under Airport Road · Limerick Township 3140B03 · Map | US-422 |
| 15 ft 7 in | Under Country Club Road · Spring Ford C.C. 3140-E08 · Map | US-422 |