MD 257 over MILL RUN


+38.34491, -76.92415
38°20'42" N, 76°55'27" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:MD 257 over MILL RUN
Structure number:100000080001010
Location:0.053 M N OF MILL RUN RD
Purpose:Carries highway over waterway
Route classification:Major Collector (Rural) [07]
Length of largest span:9.8 ft. [3.0 m]
Total length:23.0 ft. [7.0 m]
Roadway width between curbs:37.1 ft. [11.3 m]
Deck width edge-to-edge:38.4 ft. [11.7 m]
Owner:State Highway Agency [01]
Year reconstructed:1949
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:M 18 / H 20 [4]
Main span material:Concrete [1]
Main span design:Culvert [19]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: June 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:3,990 [as of 2009]
Truck traffic:8% of total traffic
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Water adequacy appraisal:Superior to present desirable criteria [9]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank protection is being eroded. River control devices and/or embankment have major damage. Trees and rush restrict the channel. [5]
Pier/abutment protection:None present but re-evaluation suggested [5]
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:93.0

Previous Inspections

DateConditionCulvert ConditionADTSuff. Rating
June 2018Fair6 out of 10399093.0
June 2016Fair6 out of 10399093.0
May 2014Fair6 out of 10399093.0
March 2012Fair6 out of 10399092.7
March 2010Fair6 out of 10399092.7
February 2008Fair6 out of 10332593.1
February 2006Fair6 out of 10332593.1
February 2004Fair6 out of 10332593.1
February 2002Fair6 out of 10305093.2
February 2000Fair6 out of 10305093.2
February 1998Fair6 out of 10305093.2
February 1996Fair6 out of 10420095.1
July 1993FairN out of 10420082.4
July 1991FairN out of 10420091.8