Structure 121700067508221 · Montgomery County, TX

IH 45 SB over SH 105

Carries IH 45 SB over SH 105, 0.50 Mi N Of FM 2854.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT465 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

465 ft end to end: about 6 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built201016 years old
Length464.9 ft141.7 m
Daily traffic129,351counted 2023
Last inspectedSeptember 2024every 24 months

Location

StateTexas
CountyMontgomery
Location0.50 Mi N Of FM 2854
CarriesIH 45 SB
CrossesSH 105
Coordinates30.31498, -95.47170

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length464.9 ft (141.7 m)
Max Span214.9 ft (65.5 m)
Deck Width95.8 ft (29.2 m)
Deck Area4137.6 sq m
Main Spans1
Year Built2010

Traffic

Avg Daily Traffic129,351 (2023)
Truck Traffic12%
Lanes On Bridge5
Lanes Under Bridge11

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number121700067508221

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

Nearby Bridges