County Road 174 over Trb Mongaup River
Sullivan County, New York · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- County Road 174 over Trb Mongaup River 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 5 (fair condition) on the 0-9 scale.
- It was built in 1929 and reconstructed in 1984, making it 96 years old at the 2025 inventory.
- It carries about 1,336 vehicles a day (traffic count year 2018).
- 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.
- 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 → (41.68631, -74.72099)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Concrete slab |
| Length | about 25 ft |
| Location | 1.7 Mi NW of Monticello |
| NBI structure number | 000000003356230 |
| Condition class | Fair |
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.