SR 574 M.L. KING over HILLSBOROUGH RIVER

Map 

Facts 

Name:	SR 574 M.L. KING over HILLSBOROUGH RIVER
Structure number:	100500
Location:	1.3 MILE W I 275
Purpose:	Carries highway and pedestrian walkway over highway and waterway
Route classification:	Other Principal Arterial (Urban) [14]
Length of largest span:	110.6 ft. [33.7 m]
Total length:	872.4 ft. [265.9 m]
Roadway width between curbs:	42.3 ft. [12.9 m]
Deck width edge-to-edge:	54.1 ft. [16.5 m]
Vertical clearance below bridge:	35.8 ft. [10.9 m]
Skew angle:	40°
Owner:	State Highway Agency [01]
Year built:	1960
Historic significance:	Bridge is not eligible for the National Register of Historic Places [5]
Design load:	MS 18 / HS 20 [5]
Number of main spans:	3
Main spans material:	Steel continuous [4]
Main spans design:	Stringer/Multi-beam or girder [02]
Deck type:	Concrete Cast-in-Place [1]
Wearing surface:	Monolithic Concrete (concurrently placed with structural deck) [1]

2010 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	36,500 [as of 2008]
Truck traffic:	2% of total traffic
Deck condition:	Satisfactory [6 out of 9]
Superstructure condition:	Good [7 out of 9]
Substructure condition:	Good [7 out of 9]
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. [7]
Pier/abutment protection:	In place and functioning [2]
Scour condition:	Bridge with "unknown" foundation that has not been evaluated for scour. [U]
Operating rating:	70.8 tons [64.4 metric tons]
Inventory rating:	41.9 tons [38.1 metric tons]
Evaluation:	Functionally obsolete [2]
Sufficiency rating:	70.2

2000 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	37,000 [as of 1996]
Truck traffic:	20% of total traffic
Deck condition:	Satisfactory [6 out of 9]
Superstructure condition:	Good [7 out of 9]
Substructure condition:	Good [7 out of 9]
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. [7]
Pier/abutment protection:	In place and functioning [2]
Scour condition:	Bridge over "tidal" waters that has not been evaluated for scour, but considered low risk. [T]
Operating rating:	70.8 tons [64.4 metric tons]
Inventory rating:	41.9 tons [38.1 metric tons]
Evaluation:	Functionally obsolete [2]
Sufficiency rating:	72.2

1992 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	34,247 [as of 1988]
Deck condition:	Good [7 out of 9]
Superstructure condition:	Satisfactory [6 out of 9]
Substructure condition:	Good [7 out of 9]
Channel protection:	Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. [6]
Pier/abutment protection:	In place but in a deteriorated condition [3]
Scour condition:	Scour calculation/evaluation has not been made. [6]
Operating rating:	70.3 tons [63.9 metric tons]
Inventory rating:	41.6 tons [37.8 metric tons]
Evaluation:	Functionally obsolete [2]
Sufficiency rating:	71.2
Recommended work:	Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:	$674,000

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