Structure 121700106201011 · Montgomery County, TX

FM 1485 over E Fork San Jacinto Riv

Carries FM 1485 over E Fork San Jacinto Riv, 5.4 Mi E Of Lp 494.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
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 FT280 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 6/9 · sets the rating

280 ft end to end, longest span 40 ft: about 4 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.

Built196957 years old
Length279.9 ft85.3 m
Daily traffic11,160counted 2023
Last inspectedOctober 2024every 24 months

Location

StateTexas
CountyMontgomery
Location5.4 Mi E Of Lp 494
CarriesFM 1485
CrossesE Fork San Jacinto Riv
Coordinates30.14527, -95.12466

Physical Characteristics

MaterialConcrete
DesignStringer/Multi-beam
Total Length279.9 ft (85.3 m)
Max Span40.0 ft (12.2 m)
Deck Width45.6 ft (13.9 m)
Deck Area1185.7 sq m
Main Spans7
Year Built1969

Traffic

Avg Daily Traffic11,160 (2023)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical5 — Stable for scour
Structure Number121700106201011

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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