US 4 Nh 16 Sp Tpk over Shawayttuck
Rockingham County, New Hampshire · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 4 Nh 16 Sp Tpk over Shawayttuck in Rockingham County, New Hampshire, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 7 (good condition) on the 0-9 scale.
- It was built in 1983 and reconstructed in 2021, making it 42 years old at the 2025 inventory.
- It carries about 68,236 vehicles a day (traffic count year 2023).
- It is one of 200 of the 309 inventoried bridges in Rockingham County rated good (64.7%); 22 (7.1%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (43.11546, -70.82268)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 8 | Very good condition |
| Superstructure | 8 | Very good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Concrete frame |
| Length | about 47 ft |
| Location | 2.5 Mi From Portsmouth T |
| NBI structure number | 018501030012400 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the New Hampshire department of transportation.
Busiest bridges in Rockingham County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-95 over Access Road | 1950 | 86,429 | Fair |
| I-95 over Maplewood Avenue | 1970 | 76,465 | Fair |
| I-95 over Preble Way CSX | 1971 | 74,766 | Fair |
| I-95 over Piscataqua River | 1971 | 74,766 | Fair |
| I-95 over Market Street | 1970 | 70,573 | Good |
| US 4 Nh 16 Sp Tpk over Gosling Road | 1993 | 59,897 | Good |
All bridges nearby: Rockingham County, NH bridge conditions · every bridge in Rockingham County · New Hampshire bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.