US Bridges

Blackburn Point RD over Dryman Bay

Good

Sarasota County, Florida · 0.7 MI W of US-41 · Structure no. 174102

Built
2001
24 years old
Condition
Good
inspected May 2024
Type
Slab
Prestressed Concrete
Length
150 ft
4 main spans
Daily traffic
1,500
2021 count
Owner
County
County Highway Agency

About this bridge

Blackburn Point RD over Dryman Bay is a prestressed concrete slab carrying Blackburn Point RD over Dryman Bay in Sarasota County, Florida. It was built in 2001, so it is 24 years old, younger than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,500 vehicles a day, roughly 4% of them trucks, projected to reach 2,602 by 2042. The structure is 150 ft (45.7 m) long and 39 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesBlackburn Point RD
CrossesDryman Bay
Location0.7 MI W of US-41
RouteCounty Highway 789
StateFlorida
Coordinates27.17993, -82.49708
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating64.8 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans4
Design loadHS 25 or greater
Structure length150 ft (45.7 m)
Longest span37 ft (11.4 m)
Deck width39 ft (11.9 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2021)
Projected traffic2,602 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Blackburn Point RD over Dryman Bay built?

It was built in 2001, making it 24 years old in 2025.

What condition is Blackburn Point RD over Dryman Bay in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does Blackburn Point RD over Dryman Bay carry?

About 1,500 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is Blackburn Point RD over Dryman Bay?

The structure is 150 ft (45.7 m) long with a longest span of 37 ft (11.4 m) and a deck 39 ft wide.

Who owns Blackburn Point RD over Dryman Bay?

It is owned by the County Highway Agency.