COLUMBUS DRIVE over HILLSBOROUGH RIVER

Map 

Facts 

Name:	COLUMBUS DRIVE over HILLSBOROUGH RIVER
Structure number:	105504
Location:	COLUMBUS AT HILL. RIVER
Purpose:	Carries highway and pedestrian walkway over waterway
Route classification:	Minor Arterial (Urban) [16]
Length of largest span:	163.1 ft. [49.7 m]
Total length:	470.2 ft. [143.3 m]
Roadway width between curbs:	40.4 ft. [12.3 m]
Deck width edge-to-edge:	42.3 ft. [12.9 m]
Vertical clearance below bridge:	10.2 ft. [3.1 m]
Owner:	County Highway Agency [02]
Year built:	1926
Historic significance:	Bridge is possibly eligible for the National Register of Historic Places [3]
Design load:	M 13.5 / H 15 [2]
Main span material:	Steel [3]
Main span design:	Movable - Swing [17]
Deck type:	Concrete Cast-in-Place [1]
Wearing surface:	Bituminous [6]

2010 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	22,000 [as of 2009]
Truck traffic:	5% of total traffic
Deck condition:	Poor [4 out of 9]
Superstructure condition:	Poor [4 out of 9]
Substructure condition:	Satisfactory [6 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 and functioning [2]
Scour condition:	Bridge is scour critical; bridge foundations determined to be unstable. [3]
Operating rating:	44.8 tons [40.7 metric tons]
Inventory rating:	26.8 tons [24.4 metric tons]
Evaluation:	Structurally deficient [1]
Sufficiency rating:	34.5

2000 Inspection 

Status:	Posted for load [P]
Average daily traffic:	22,000 [as of 1999]
Truck traffic:	5% of total traffic
Deck condition:	Satisfactory [6 out of 9]
Superstructure condition:	Fair [5 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:	34.7 tons [31.5 metric tons]
Inventory rating:	24.8 tons [22.5 metric tons]
Evaluation:	Functionally obsolete [2]
Sufficiency rating:	49.0

1992 Inspection 

Status:	Posted for load [P]
Average daily traffic:	20,000 [as of 1991]
Truck traffic:	5% of total traffic
Deck condition:	Satisfactory [6 out of 9]
Superstructure condition:	Satisfactory [6 out of 9]
Substructure condition:	Poor [4 out of 9]
Channel protection:	Bank protection has failed. River control devices have been destroyed. Stream bed aggradation, degradation or lateral movement has changed the channel to now threaten the bridge and/or approach roadway. [3]
Pier/abutment protection:	In place but in a deteriorated condition [3]
Scour condition:	Scour calculation/evaluation has not been made. [6]
Operating rating:	34.7 tons [31.5 metric tons]
Inventory rating:	24.8 tons [22.5 metric tons]
Evaluation:	Structurally deficient [1]
Sufficiency rating:	28.9
Recommended work:	Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:	$278,000

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