Structure 121700033802079 · Montgomery County, TX

SH 105 over Lake Creek

Carries SH 105 over Lake Creek, 0.60 Mi NE Of FM 1486.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT800 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

800 ft end to end, longest span 40 ft: about 2.2 football fields. 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.

Built1948rebuilt 1994
Length799.9 ft243.8 m
Daily traffic10,312counted 2023
Last inspectedSeptember 2024every 24 months

Location

StateTexas
CountyMontgomery
Location0.60 Mi NE Of FM 1486
CarriesSH 105
CrossesLake Creek
Coordinates30.37149, -95.76910

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length799.9 ft (243.8 m)
Max Span40.0 ft (12.2 m)
Deck Width46.9 ft (14.3 m)
Deck Area3486.3 sq m
Main Spans20
Year Built1948 (reconstructed 1994)

Traffic

Avg Daily Traffic10,312 (2023)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number121700033802079

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.

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