US Bridges

SR 91 Tpk NB 277.1 over Blackstill Lake RD

Good

Lake County, Florida · 3.1MI N of Orange CO Line · Structure no. 110033

Built
1964
61 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
132 ft
3 main spans
Daily traffic
37,950
2022 count
Owner
Toll Authority
State Toll Authority

About this bridge

SR 91 Tpk NB 277.1 over Blackstill Lake RD is a prestressed concrete stringer/multi-beam or girder carrying SR 91 Tpk NB 277.1 over Blackstill Lake RD in Lake County, Florida. It was built in 1964, so it is 61 years old, older 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 37,950 vehicles a day, roughly 20% of them trucks, projected to reach 65,843 by 2044. The structure is 132 ft (40.1 m) long and 44 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSR 91 Tpk NB 277.1
CrossesBlackstill Lake RD
Location3.1MI N of Orange CO Line
RouteState Highway 91
StateFlorida
Coordinates28.57597, -81.70023
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47 US tons
Inventory rating36.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length132 ft (40.1 m)
Longest span45 ft (13.7 m)
Deck width44 ft (13.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,950 (2022)
Projected traffic65,843 by 2044
Trucks20%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 91 Tpk NB 277.1 over Blackstill Lake RD built?

It was built in 1964, making it 61 years old in 2025.

What condition is SR 91 Tpk NB 277.1 over Blackstill Lake RD 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 October 2023.

How much traffic does SR 91 Tpk NB 277.1 over Blackstill Lake RD carry?

About 37,950 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is SR 91 Tpk NB 277.1 over Blackstill Lake RD?

The structure is 132 ft (40.1 m) long with a longest span of 45 ft (13.7 m) and a deck 44 ft wide.

Who owns SR 91 Tpk NB 277.1 over Blackstill Lake RD?

It is owned by the State Toll Authority.