I 225 ML
I 225 ML in In Aurora, Arapahoe County, Colorado received a condition grade of B (76/100). Built in 1965, the bridge carries 140K vehicles daily on I 225 ML over Tollgate Creek.
I 225 ML carries a B on the BridgeSafety Condition Score with 76/100. Most component ratings are solid; one or two may show wear consistent with the structure’s age, but the bridge is not flagged as structurally deficient.
The bridge was built in 1965 and is now 61 years old, at or past the typical 50-year design life for bridges of its vintage. Maintenance and inspection cycles are correspondingly more involved than for newer structures. I 225 ML carries an average daily traffic count of 140,000 vehicles, with 8 lane(s) crossing Tollgate Creek. The owning agency is State Highway Agency; bridge inspection records flow into the federal NBI database annually.
Component Ratings
The riding surface, evaluated for cracking, spalling, and wear
Beams, girders, and trusses that support the deck
Piers, abutments, and foundations below the deck
Bridge Details
About This Bridge
I 225 ML is a 61-year-old bridge located In Aurora in Arapahoe County, Colorado. The bridge carries I 225 ML over Tollgate Creek with 8 traffic lanes, handling approximately 140K vehicles per day. Built in 1965 and reconstructed in 1987, the structure spans 60.7 meters.
The bridge received a Condition Grade of B (76/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 7/9 (good), and substructure 8/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I 225 ML has a Condition Score of 76/100 (Grade B). Its deck is rated 7/9, superstructure 7/9, and substructure 8/9 on the NBI scale. The bridge is not classified as structurally deficient.
I 225 ML was built in 1965 and reconstructed in 1987, making it 61 years old. The average bridge age in the United States is 48 years.
I 225 ML carries approximately 140K vehicles per day (average daily traffic). The bridge has 8 traffic lanes. It is 60.7 meters long and located on I 225 ML in In Aurora, Arapahoe County, Colorado.
No, I 225 ML is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
I 225 ML is located In Aurora in Arapahoe County, Colorado. The bridge carries I 225 ML over Tollgate Creek. Its coordinates are 39.732639, -104.825058. It is maintained by State Highway Agency.
I 225 ML carries I 225 ML over Tollgate Creek. The bridge is 60.7 meters long and was built in 1965, with reconstruction in 1987.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.
Source: FHWA National Bridge Inventory, 2026.