US Bridges

SR-206 Crescent over Matanzas River Iww

Fair

St. Johns County, Florida · 0.1 MI W of SR-A1A · Structure no. 780090

Built
1975
50 years old
Condition
Fair
inspected October 2024
Type
Movable - Bascule
Steel
Length
2,980 ft
1 main span
Daily traffic
13,000
2023 count
Owner
State
State Highway Agency

About this bridge

SR-206 Crescent over Matanzas River Iww is a steel movable - bascule carrying SR-206 Crescent over Matanzas River Iww in St. Johns County, Florida. It was built in 1975, so it is 50 years old, older than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 13,000 vehicles a day, roughly 7% of them trucks, projected to reach 22,555 by 2045. The structure is 2,980 ft (908.3 m) long and 43 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesSR-206 Crescent
CrossesMatanzas River Iww
Location0.1 MI W of SR-A1A
RouteState Highway 206
CountySt. Johns County
StateFlorida
Coordinates29.76789, -81.25889
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating50.8 US tons
Inventory rating30.2 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckOpen grating
Main spans1 (+44 approach)
Design loadHS 20
Structure length2,980 ft (908.3 m)
Longest span139 ft (42.4 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deck18 ft (5.6 m)

Traffic and service

Average daily traffic13,000 (2023)
Projected traffic22,555 by 2045
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$721,000
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR-206 Crescent over Matanzas River Iww built?

It was built in 1975, making it 50 years old in 2025.

What condition is SR-206 Crescent over Matanzas River Iww in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does SR-206 Crescent over Matanzas River Iww carry?

About 13,000 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is SR-206 Crescent over Matanzas River Iww?

The structure is 2,980 ft (908.3 m) long with a longest span of 139 ft (42.4 m) and a deck 43 ft wide.

Who owns SR-206 Crescent over Matanzas River Iww?

It is owned by the State Highway Agency.