Share:

SH 21 over PORTERS CREEK

Map

Coordinates:
+30.58206, -96.63473
30°34'55" N, 96°38'05" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:SH 21 over PORTERS CREEK
Structure number:170260011603038
Location:5.0 MI E OF SH 36
Purpose:Carries highway over waterway
Route classification:Principal Arterial - Other (Rural) [02]
Length of largest span:9.8 ft. [3.0 m]
Total length:22.0 ft. [6.7 m]
Skew angle:99°
Owner:State Highway Agency [01]
Year built:1968
Year reconstructed:1988
Historic significance:Bridge is possibly eligible for the National Register of Historic Places [3]
Design load:MS 18 / HS 20 [5]
Number of main spans:2
Main spans material:Concrete [1]
Main spans design:Culvert [19]
Deck type:Not applicable [N]

Latest Available Inspection: August 2016

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:13,070 [as of 2013]
Truck traffic:20% of total traffic
Structural appraisal:Equal to present minimum criteria [6]
Water adequacy appraisal:Superior to present desirable criteria [9]
Roadway alignment appraisal:Equal to present desirable criteria [8]
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]
Culvert condition: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. [6]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Sufficiency rating:75.3

Previous Inspections

DateConditionCulvert ConditionADTSuff. Rating
August 2016Fair6 out of 101307075.3
August 2014Fair6 out of 101320059.2
September 2012Fair6 out of 101320059.2
September 2010Fair6 out of 101140064.2
September 2008Fair6 out of 101180060.8
September 2006Fair6 out of 101120061.4
September 2004Fair6 out of 101190060.4
October 2002Fair6 out of 101100061.2
October 2000Good7 out of 10930060.7
January 1999Good7 out of 10990060.2
April 1997Good7 out of 10840064.5
April 1995Good7 out of 10820072.7
September 1993Good7 out of 10760073.2
October 1989Good8 out of 10740073.4

Element Data

Source: National Bridge Elements dataset, 2018 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Culvert
Reinforced Concrete Culvertlinear ft.50635315030