Garrison Street over Ralston Creek
Jefferson County, Colorado · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Garrison Street over Ralston Creek in Jefferson County, Colorado, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2013, making it 12 years old at the 2025 inventory.
- It carries about 3,986 vehicles a day (traffic count year 2021).
- Its listed owner is a city or municipal highway agency.
- It is one of 159 of the 468 inventoried bridges in Jefferson County rated good (34.0%); 30 (6.4%) 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 April 2023, 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 → (39.80357, -105.10013)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous prestressed concrete multiple box beam |
| Length | about 107 ft |
| Location | Just S of Brooks Dr |
| NBI structure number | ARVA-GN-0.15-1A |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Colorado department of transportation.
Busiest bridges in Jefferson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 70 Ml over Garrison Street | 1967 | 118,000 | Fair |
| I 70 Ml over Carr Street | 1967 | 118,000 | Fair |
| I 70 Ml over SH 121 Ml | 1996 | 118,000 | Fair |
| US 6 Ml over SH 95 Ml/sheridan Ave. | 2011 | 114,000 | Good |
| I-70 Ml over SH 72 Ml/ward Road | 2024 | 112,000 | Good |
| I70 Ml over Light Rail | 2010 | 106,000 | Fair |
All bridges nearby: Jefferson County, CO bridge conditions · every bridge in Jefferson County · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.