polk County Bridge Inspections
Florida Bridge Information - Polk County
Us-17 Over Gravel Creek
| Florida State Bridge Inspections |
|---|
| Health Index 1 | Sufficiency Rating 2 |
|---|
| 35.4 |
58.0 |
| National Bridge Inventory Rating |
|---|
|
|
| Bridge Information |
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| Structure Status: | Open, no restriction |
| County: | Polk County |
| Owner: | State Highway Agency |
Maintenance Responsibility: | State Highway Agency |
| Roadway: | Us-17 (Sr-555) |
Facility Crossed: | Gravel Creek |
| Year Built: | 1934 |
Reconstructed: | 1964 |
| Average Daily Traffic - State: | 23,500 |
| Average Daily Traffic - NBI: | 22,500 |
| Average Daily Truck Traffic - NBI: | 1575.0 (7 % of NBI Average Daily Traffic) |
| Future Average Daily Traffic - NBI: | 39,038 in year 2027 |
| Bypass, Detour Length: | 9.9 mile |
| Toll System: | On free road. The structure is toll-free and carries a toll-free highway. |
| Functional Classification: | Expressways - Other Principal Arterial |
| Type of Service On the Structure: | Highway |
| Lanes On the Structure: | 4 |
| Vertical Clearance Over Bridge Roadway: | No restriction exists |
| Type of Service Under the Structure: | Waterway |
| Lanes Under the Structure: | 0 |
| Vertical Clearance Under Bridge Roadway: | Feature not a highway or railroad |
| Historical Significance: | Bridge is possibly eligible for the National Register of Historic Places (requires further investigation before determination can be made) or bridge is on a State or local historic register. |
| Last Inspection - State: | September 13, 2010 |
| Last Inspection - NBI: | October, 2006 |
| Designated Inspection Frequency (NBI): | Every 24 Months |
| National Bridge Inventory Safety Feature |
|---|
| Bridge Median: | Closed median (no barrier) |
| Bridge Railings: | Not applicable or a safety feature is not required. |
| Transitions: | Not applicable or a safety feature is not required. |
| 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: | NOT APPLICABLE |
| Superstructure: | NOT APPLICABLE |
| Substructure: | NOT APPLICABLE |
| 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: | Deterioration or initial disintegration, minor chloride contamination, cracking with some leaching, or spalls on concrete or masonry walls and slabs. Local minor scouring at curtain walls, wingwalls, or pipes. Metal culverts have a smooth curvature, non-symmetrical shape, significant corrosion or moderate pitting. |
| National Bridge Inventory Operating Ratings: Load Factor (LF) - 99.9 tons |
| National Bridge Inventory Ratings: Load Factor (LF) - 53.5 tons |
| National Bridge Inventory Appraisal Ratings |
|---|
| Structural Evaluation: | 6 - Equal to present minimum criteria |
| Deck Geometry : | N - Not applicable |
| Underclear, Vertical & Horizontal : | N - Not applicable |
| Waterway Adequacy : | 5 - Somewhat better than minimum adequacy to tolerate being left in place as is |
| Approach Roadway Alignment : | 9 - Superior to present desirable criteria |
| Critical Feature Inspection |
|---|
| Fracture Critical Details: N |
| Underwater Inspection: N |
| Other Special Inspection: N |
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: January, 2010) & U.S. Department of Transportation