US Bridges

SR688 (walsingham) over Intracoastal Waterway

Fair

Pinellas County, Florida · 0.3MI E/O SR-699 · Structure no. 150225

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

About this bridge

SR688 (walsingham) over Intracoastal Waterway is a steel movable - bascule carrying SR688 (walsingham) over Intracoastal Waterway in Pinellas County, Florida. It was built in 1999, so it is 26 years old, younger 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 446 ft (135.9 m) long and 43 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSR688 (walsingham)
CrossesIntracoastal Waterway
Location0.3MI E/O SR-699
RouteState Highway 688
CountyPinellas County
StateFlorida
Coordinates27.8835, -82.84536
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.6 US tons
Inventory rating37.5 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20 + Mod
Structure length446 ft (135.9 m)
Longest span142 ft (43.3 m)
Deck width43 ft (13 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deck19 ft (5.7 m)

Traffic and service

Average daily traffic8,750 (2022)
Projected traffic15,181 by 2044
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
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 SR688 (walsingham) over Intracoastal Waterway built?

It was built in 1999, making it 26 years old in 2025.

What condition is SR688 (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 SR688 (walsingham) over Intracoastal Waterway carry?

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

How long is SR688 (walsingham) over Intracoastal Waterway?

The structure is 446 ft (135.9 m) long with a longest span of 142 ft (43.3 m) and a deck 43 ft wide.

Who owns SR688 (walsingham) over Intracoastal Waterway?

It is owned by the State Highway Agency.