pinellas County Bridge Inspections  

Florida Bridge Information - Pinellas County

Bob Graham Sunshine Skyway Bridge

Florida State Bridge Inspections
Health Index 1Sufficiency Rating 2
86.7 69.2

National Bridge Inventory Rating
Not Available

Bridge Information
Structure Status: Open, no restriction
County: Pinellas County
Owner: State Highway Agency Maintenance Responsibility: State Highway Agency
Roadway: I-275 (Sr 93) Facility Crossed: Tampa Bay
Year Built: 1986
Average Daily Traffic - State: 51,992
Average Daily Traffic - NBI: 50,500
Average Daily Truck Traffic - NBI: 3535.0 (7 % of NBI Average Daily Traffic)
Future Average Daily Traffic - NBI: 87,618 in year 2032
Bypass, Detour Length: 41.0 mile
Toll System: On Interstate toll segment under Secretarial Agreement. Structure functions as a part of the toll segment.
Functional Classification: Urban - Principal Arterial - Interstate
Type of Service On the Structure: Highway
Lanes On the Structure: 4
Vertical Clearance Over Bridge Roadway: 3 feet
Type of Service Under the Structure: Waterway
Lanes Under the Structure: 0
Vertical Clearance Under Bridge Roadway: Feature not a highway or railroad, 0.00 feet
Historical Significance: Bridge is not eligible for the National Register of Historic Places.
Last Inspection - State: September 27, 2013
Last Inspection - NBI: September, 2010
Designated Inspection Frequency (NBI): Every 24 Months

Bridge Location

National Bridge Inventory Safety Feature
Bridge Median: Closed median with non-mountable barriers
Bridge Railings: Inspected feature meets currently acceptable standards.
Transitions: Inspected feature does not meet currently acceptable standards or a safety feature is required and none is provided.
Approach Guardrail: Inspected feature meets currently acceptable standards.
Approach Guardrail Ends: Inspected feature does not meet currently acceptable standards or a safety feature is required and none is provided.

National Bridge Inventory Condition Ratings
Deck: GOOD CONDITION - some minor problems.
Superstructure: GOOD CONDITION - some minor problems.
Substructure: GOOD CONDITION - some minor problems.
Channel and Channel Protection: Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift.
Culverts: Not applicable. Use if structure is not a culvert.

National Bridge Inventory Operating Ratings: Load and Resistance Factor (LRFR) - 3.07 tons
National Bridge Inventory Ratings: Load and Resistance Factor (LRFR) - 2.71 tons

National Bridge Inventory Appraisal Ratings
Structural Evaluation: 6 - Equal to present minimum criteria
Deck Geometry : 9 - Superior to present desirable criteria
Underclear, Vertical & Horizontal : N - Not applicable
Waterway Adequacy : 8 - Equal to present desirable criteria
Approach Roadway Alignment : 8 - Equal to present desirable criteria

Type of Proposed Work
Work Proposed: Other structural work, including hydraulic replacements.
Work Done By: Work to be done by contract

Critical Feature Inspection
Fracture Critical Details: N
Underwater Inspection: Y24
Other Special Inspection: N

Cost Estimates
Bridge Improvement Cost: 1100
Roadway Improvement Cost: 110
Total Project Cost (Year of Cost Estimate): 1210 ()

1. The "health index" is a tool that measures the overall condition of a bridge. The health index typically includes about 10 to 12 different elements that are evaluated by the department. A lower health index means that more work would be required to improve the bridge to an ideal condition. A health index below 85 generally indicates that some repairs are needed, although it doesn't mean the bridge is unsafe. A low health index may also indicate that it would be more economical to replace the bridge than to repair it.

2. The "sufficiency rating" is a tool that is used to help determine whether a bridge that is structurally deficient or functionally obsolete should be repaired or just replaced. The sufficiency rating considers a number of factors, only about half of which relate to the condition of the bridge itself. The sufficiency ratings for bridges are part of a formula used by the Federal Highway Administration when it allocates federal funds to the states for bridge replacement.

Source: Office of Maintenance, Florida Department of Transportation (Last Update: April, 2013) & U.S. Department of Transportation

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