County Road DD over Hell Creek
Washington County, Colorado · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- County Road DD over Hell Creek in Washington County, Colorado, 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 1997, making it 28 years old at the 2025 inventory.
- It carries about 8 vehicles a day (traffic count year 2023).
- Its listed owner is the county highway agency.
- It is one of 59 of the 76 inventoried bridges in Washington County rated fair (77.6%); 3 (3.9%) 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 October 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 → (39.96344, -103.19911)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Prestressed concrete tee beam |
| Length | about 62 ft |
| Location | 1.3 Mi. N. of Co. Rd. 26 |
| NBI structure number | WTNDD-27.30-A |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 4: foundations stable, field review says exposed foundations need protection |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Colorado department of transportation.
Busiest bridges in Washington County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 76 Ml Wbnd over County Road Q | 1964 | 5,500 | Fair |
| I 76 Ml Ebnd over County Road Q | 1964 | 5,500 | Fair |
| US 34 Ml over Camp Creek | 2000 | 3,300 | Good |
| US 34 Ml over Draw | 2006 | 3,100 | Good |
| US 34 Ml over Surveyor Creek | 1935 | 2,900 | Fair |
| US 6 Ml over Prewitt Res Intake Canal | 1941 | 1,100 | Fair |
All bridges nearby: Washington County, CO bridge conditions · every bridge in Washington County · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.