Old White Lk Trpk over W Br Mongaup Rvr
Sullivan County, New York · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Old White Lk Trpk over W Br Mongaup Rvr in Sullivan County, New York, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1977, making it 48 years old at the 2025 inventory.
- It carries about 335 vehicles a day (traffic count year 2017).
- Its listed owner is the county highway agency.
- It is one of 230 of the 365 inventoried bridges in Sullivan County rated fair (63.0%); 27 (7.4%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- It was rated good in the 2024 inventory and is now fair (substructure 7 to 6).
- Its most recent inspection on record is dated March 2024, on a 12-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (41.7151, -74.79143)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 6 | Satisfactory condition |
Bridge details
| Structure | Timber slab |
| Length | about 32 ft |
| Location | 2.5 MI South of Swan Lake |
| NBI structure number | 000000002228810 |
| Condition class | Fair |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | March 2024 |
| Inspection interval (item 91) | 12 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the New York department of transportation.
Busiest bridges in Sullivan County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Rte 17 over Shawangunk Kill | 1958 | 36,449 | Fair |
| Rte 17 over Ex-ny O&w RR Row | 1955 | 33,188 | Good |
| Rte 17 over Basher Kill | 1955 | 33,188 | Fair |
| Rte 17 over South Road | 1956 | 33,188 | Fair |
| Rte 42 over 17 17 96091285 Rte 17 | 1998 | 22,996 | Fair |
| Rte 17 over E Br Mongaup Rvr | 1960 | 18,972 | Fair |
All bridges nearby: Sullivan County, NY bridge conditions · every bridge in Sullivan County · New York bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.