SRT ML & SH 121 FR
SRT ML & SH 121 FR in 1.15 MI SW Of Dallas Pkwy, Collin County, Texas received a condition grade of F (0/100). Built in 2007, the bridge carries 204K vehicles daily on SRT ML & SH 121 FR over Drain. It is classified as structurally deficient.
SRT ML & SH 121 FR carries an F on the BridgeSafety Condition Score with 0/100 — the bottom tier of the FHWA NBI distribution. Component ratings flag the structure for near-term rehabilitation or replacement; the bridge may remain open to traffic but is on the priority list for action.
The bridge was built in 2007 and is 19 years old — relatively young against the U.S. bridge stock. Modern bridges built to current FHWA standards generally outperform older structures on condition ratings. SRT ML & SH 121 FR carries an average daily traffic count of 204,044 vehicles, with 19 lane(s) crossing Drain. The owning agency is Local Toll Authority; 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
SRT ML & SH 121 FR is a 19-year-old bridge located 1.15 MI SW Of Dallas Pkwy in Collin County, Texas. The bridge carries SRT ML & SH 121 FR over Drain with 19 traffic lanes, handling approximately 204K vehicles per day. Built in 2007 and reconstructed in 2015, the structure spans 9.8 meters.
The bridge received a Condition Grade of F (0/100) based on Federal Highway Administration inspection data. Its deck is rated 0/9 (serious), superstructure 0/9 (serious), and substructure 0/9 (serious). The bridge is classified as structurally deficient, meaning at least one major component is rated 4 or below, this signals a need for repair or replacement but does not necessarily indicate an immediate safety hazard.
This bridge is owned and maintained by Local Toll Authority.
Location Map
Frequently Asked Questions
SRT ML & SH 121 FR has a Condition Score of 0/100 (Grade F). Its deck is rated 0/9, superstructure 0/9, and substructure 0/9 on the NBI scale. The bridge is classified as structurally deficient.
SRT ML & SH 121 FR was built in 2007 and reconstructed in 2015, making it 19 years old. The average bridge age in the United States is 48 years.
SRT ML & SH 121 FR carries approximately 204K vehicles per day (average daily traffic). The bridge has 19 traffic lanes. It is 9.8 meters long and located on SRT ML & SH 121 FR in 1.15 MI SW Of Dallas Pkwy, Collin County, Texas.
Yes, SRT ML & SH 121 FR is classified as structurally deficient because at least one of its primary components (deck, superstructure, or substructure) is rated 4 or below on the 0-9 NBI scale. This does not necessarily mean it is unsafe, but it requires significant repair or replacement.
SRT ML & SH 121 FR is located 1.15 MI SW Of Dallas Pkwy in Collin County, Texas. The bridge carries SRT ML & SH 121 FR over Drain. Its coordinates are 33.085844, -96.841972. It is maintained by Local Toll Authority.
SRT ML & SH 121 FR carries SRT ML & SH 121 FR over Drain. The bridge is 9.8 meters long and was built in 2007, with reconstruction in 2015.
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.