Parks Highway over Summit Overhead
Denali Borough, Alaska · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Parks Highway over Summit Overhead in Denali Borough, Alaska, 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 2006, making it 19 years old at the 2025 inventory.
- It carries about 900 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 5 of the 27 inventoried bridges in Denali Borough rated good (18.5%); 1 (3.7%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated June 2024, on a 24-month routine inspection cycle.
- 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 → (63.34269, -149.08779)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete tee beam |
| Length | about 145 ft |
| Location | Mile Point 168.8 |
| NBI structure number | 2084 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Alaska department of transportation.
Busiest bridges in Denali Borough
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Parks Highway over Kingfisher Creek | 1971 | 2,670 | Fair |
| Parks Highway over Hornet Creek | 1971 | 2,670 | Fair |
| Parks Highway over Iceworm Gulch | 1971 | 2,670 | Fair |
| Parks Highway over Nenana River Park Sta | 1970 | 2,340 | Fair |
| Parks Highway over Nenana River Park Bnd | 1973 | 1,680 | Fair |
| Parks Highway over Riley Creek | 2015 | 1,680 | Good |
All bridges nearby: Denali Borough, AK bridge conditions · every bridge in Denali Borough · Alaska bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.