Arkansas Hwy 177 over Norfork Dam Spillway
Baxter County, Arkansas · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Arkansas Hwy 177 over Norfork Dam Spillway in Baxter County, Arkansas, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1944 and reconstructed in 2008, making it 81 years old at the 2025 inventory.
- It carries about 2,800 vehicles a day (traffic count year 2020).
- It is one of 35 of the 91 inventoried bridges in Baxter County rated fair (38.5%); 0 (0.0%) 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 August 2023, on a 24-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 → (36.24833, -92.23778)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete slab |
| Length | about 575 ft |
| Location | 13 Mi SE of Mountain Home |
| NBI structure number | AHTD000000M3875 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2023 |
| Inspection interval (item 91) | 24 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 Arkansas department of transportation.
Busiest bridges in Baxter County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 62B Baxter over Hicks Creek | 1986 | 20,000 | Good |
| US 62B Baxter over Hicks Creek | 1986 | 20,000 | Good |
| US 62/412 Baxter over Big Creek | 1939 | 17,000 | Good |
| US 62B Baxter over Dodd Creek | 1934 | 14,000 | Fair |
| US 62/412 Baxter over Ditch | 1995 | 12,000 | Fair |
| SH 5 Baxter over Hicks Creek | 1929 | 7,600 | Fair |
All bridges nearby: Baxter County, AR bridge conditions · every bridge in Baxter County · Arkansas bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.