W. Flatiron Circle over Rock Cr and IRR Dtch
Broomfield County, Colorado · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- W. Flatiron Circle over Rock Cr and IRR Dtch in Broomfield 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 2000, making it 25 years old at the 2025 inventory.
- It carries about 6,174 vehicles a day (traffic count year 2023).
- Its listed owner is a city or municipal highway agency.
- It is one of 30 of the 60 inventoried bridges in Broomfield County rated good (50.0%); 1 (1.7%) 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 January 2025, 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 → (39.93708, -105.13674)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 115 ft |
| Location | 200ft N of Flatiron W Ent |
| NBI structure number | BFD-W.FLT-W.ENT |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | January 2025 |
| 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 Colorado department of transportation.
Busiest bridges in Broomfield County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 36 Ml over Ramp B & Bikepath | 2001 | 68,000 | Good |
| US 36 Ml over Rock Creek | 2015 | 68,000 | Good |
| US 36 Ml over Flat Iron Circle East | 1999 | 62,000 | Good |
| I 25 Ml Nbnd over County Road 6 | 2004 | 54,000 | Good |
| I25 Ml Sbnd over Weld County Road 6 | 2004 | 54,000 | Good |
| I 25 Ml Nbnd over Nwp | 2002 | 54,000 | Good |
All bridges nearby: Broomfield County, CO bridge conditions · every bridge in Broomfield County · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.