US Bridges

SR 688 Walsingham over Intracoastal Waterway

Fair

Pinellas County, Florida · 0.3 Mile E of SR 699 · Structure no. 150112

Built
1958
67 years old, rebuilt 1999
Condition
Fair
inspected May 2023
Type
Movable - Bascule
Steel
Length
458 ft
1 main span
Daily traffic
8,750
2022 count
Owner
State
State Highway Agency

About this bridge

SR 688 Walsingham over Intracoastal Waterway is a steel movable - bascule carrying SR 688 Walsingham over Intracoastal Waterway in Pinellas County, Florida. It was built in 1958 and reconstructed in 1999, so it is 67 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 6 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 8,750 vehicles a day, roughly 4% of them trucks, projected to reach 15,181 by 2044. The structure is 458 ft (139.6 m) long and 35 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSR 688 Walsingham
CrossesIntracoastal Waterway
Location0.3 Mile E of SR 699
RouteState Highway 688
CountyPinellas County
StateFlorida
Coordinates27.88336, -82.84544
Functional classUrban Other Principal 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating41.4 US tons
Inventory rating24.9 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+8 approach)
Design loadUnknown
Structure length458 ft (139.6 m)
Longest span134 ft (40.8 m)
Deck width35 ft (10.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck19 ft (5.9 m)

Traffic and service

Average daily traffic8,750 (2022)
Projected traffic15,181 by 2044
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR 688 Walsingham over Intracoastal Waterway built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1999.

What condition is SR 688 Walsingham over Intracoastal Waterway 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 May 2023.

How much traffic does SR 688 Walsingham over Intracoastal Waterway carry?

About 8,750 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is SR 688 Walsingham over Intracoastal Waterway?

The structure is 458 ft (139.6 m) long with a longest span of 134 ft (40.8 m) and a deck 35 ft wide.

Who owns SR 688 Walsingham over Intracoastal Waterway?

It is owned by the State Highway Agency.