Structure 890107 · Martin County, FL

Cr708 SE Bridge RD over Intracoastal Waterway

Carries Cr708 SE Bridge RD over Intracoastal Waterway, 0.9 M E Of Us-1 On Cr-708.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT383 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

383 ft end to end: about 5 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 bascule bridge (drawn closed).

Built198541 years old
Length382.5 ft116.6 m
Daily traffic10,502counted 2023
Last inspectedOctober 2023every 24 months

Location

StateFlorida
CountyMartin
Location0.9 M E Of Us-1 On Cr-708
CarriesCr708 SE Bridge RD
CrossesIntracoastal Waterway
Coordinates27.06467, -80.12230

Physical Characteristics

MaterialSteel
DesignMovable - Bascule
Total Length382.5 ft (116.6 m)
Max Span138.8 ft (42.3 m)
Deck Width44.6 ft (13.6 m)
Deck Area1585.8 sq m
Main Spans1
Year Built1985

Traffic

Avg Daily Traffic10,502 (2023)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number890107

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