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​Bridge Inspection Terminology

The definitions below are to be used in conjunction with the state and locally owned bridge sufficiency and condition ratings Excel spreadsheets. Download the terminology document. (PDF)

25,000 Bridges State Routes — Sufficiency/Condition Ratings

List of bridges on State Roads (Excel)

Summary Statistics for Bridges on State Roads (Excel)

6,400 Bridges on Locally Owned Roads — Sufficiency/Condition Ratings

List of bridges on Locally Owned Roads (Excel)

Summary Statistics of Bridges on Locally Owned Roads (Excel)

Column ID​Name​Definition
a​BRKeyUnique identifier assigned to the bridge structure.​
b​County​Name of county where bridge is located.
cBridge ID​​Identification number assigned to bridge location.
d​Location/Structure NameGeographic location of bridge, or the official, or commonly used, name for bridge.​
e​Feature CarriedRoadway that continues (or is carried) over bridge.

Roadway is identified by either the assigned street name or number, and possibly the direction of traffic using the bridge (for example, EB means eastbound). Abbreviation indicates whether the roadway is a federal highway (I for interstate), state-owned roadway (SR for state route), or local roadway owned by township/municipality. ​
f​Feature Intersected​Roadway, waterway or railroad (or combination of these) that exists underneath the bridge.
gOwner Code​Two-digit code identifying governmental agency or railroad that owns bridge and is responsible for inspecting and maintaining the physical structure.

01 PennDOT

02 County Highway Agency

03 Town or Township Highway Agency

04 City, Municipal Highway Agency, Borough

11 State Park, Forest or Reservation Agency

12 Local Park, Forest or Reservation Agency

21 Other State Agencies

25 Other Local Agencies

26 Private (other than railroad)

27 Railroad
31 State Toll Authority

32 Local Toll Authority

60 Other Federal Agencies (not listed below)

62 Bureau of Indian Affairs

64 U.S. Forest Service

66 National Park Service

68 Bureau of Land Management

69 Bureau of Reclamation

70 Military Reservation Corps of Engineers

80 Unknown
h​Length (feet)​Length of the bridge measured in feet.
i​Deck AreaThe bridge deck area in square feet as determined by multiplying the structure length by the out-to-out width of the bridge deck.​
j​# SpansTotal number of sections (or spans) to the bridge from edge of roadway to support (pier), and from support to support.​
kStructure Type​​Material and construction type of bridge's superstructure.
lYear Built​Year the bridge was built.​
m​Post Status​Operational status of bridge:

Open — bridge is open to traveling public.

Closed — bridge is closed to vehicular traffic (barriers and signs put in place). Pedestrian traffic may/may not be allowed.

Posted — bridge is open but signs have been placed stating a weight limit that can travel across the bridge.

Temp — bridge has temporary supports and/or restrictions in place.

U/CON — bridge is closed due to construction.
nWeight Limit — Single (Tons)​If bridge is posted, signs are placed to indicate the maximum weight (in tons) of a single vehicle (for example, a concrete mixer truck) that can travel on the bridge. "1 TRK" means that the bridge is limited to one truck traveling on it a time without a weight limit.​
o​Weight Limit — Comb (Tons) (Combination)If bridge is posted, signs are placed to indicate the maximum weight (in tons) of a combination vehicle (for example, tractor trailer) that can travel on the bridge. "1 TRK" means that the bridge is limited to one truck traveling on it a time without a weight limit.​
p​Weight Limit Other (Tons)​When a bridge posted and limited to one truck at a time, signs are placed to indicate the maximum weight (in tons) of that truck.
q​Condition Rating — Deck​Single-digit number that describes the physical condition of the deck (top surface of bridge that carries traffic) compared to its original as-built condition. Number is assigned by state-certified bridge inspectors during each inspection of the bridge, which occurs at least every two years. Number range is nine to zero.

See the description for Condition Rating – Superstructure for an explanation of each number.
rCondition Rating — Super

Superstructure is the underlying or supporting part of a bridge, for example steel members under the deck.
​Single-digit number that describes the physical condition of the superstructure compared to its original as-built condition. Number is assigned by state-certified bridge inspectors during each inspection of the bridge, which occurs at least every two years.

Number range is nine to zero. A rating of 4 or below indicates a bridge is in poor condition.

N = Not applicable.

9 = Excellent.

8 = Very good.

7 = Good, some minor problems noted.

6 = Satisfactory, structural elements showing minor deterioration.

5 = Fair, primary structural elements are sound but showing minor cracks and signs of deterioration.

4 = Poor, deterioration of primary structural elements has advanced.

3 = Serious, deterioration has seriously affected the primary structural components.

2 = Critical, deterioration of primary structural components has advanced and bridge will be closely monitored, or closed, until corrective action can be taken.

1 = Imminent failure, major deterioration in critical structural components. Bridge is closed but corrective action may put the bridge back into light service.

0 = Failed, bridge is out of service and beyond corrective action.
s​Condition Rating — Sub

Substructure is the part of the bridge that supports the super-structure such as piers and abutments.
Single-digit number that describes the physical condition of the substructure compared to its original as-built condition. Number is assigned by state-certified bridge inspectors during each inspection of the bridge, which occurs at least every two years.

See the description for Condition Rating – Superstructure for an explanation of each number. ​
t​Condition Rating — Culv

Culvert is a curved or rectangular structure below the roadway surface used primarily for water flow.
Single-digit number that describes the physical condition of the culvert compared to its original as-built condition. Number is assigned by state-certified bridge inspectors during each inspection of the bridge, which occurs at least every two years.

See the description for Condition Rating – Superstructure for an explanation of each number.
u​Overall ConditionIndication of bridge’s overall status in terms of structural soundness and ability to service traveling public. Overall Condition is determined by the lowest rating of Deck, Superstructure, Substructure, or Culvert.

Good - A numeric score greater than, or equal to, 7 on primary component conditions rating.

Fair - A numeric score of 5 or 6 on primary component conditions rating.

Poor - Previously referred to as Structurally Deficient indicates that the bridge has deterioration to one or more of its major components. A numeric score of 4 or less on primary components conditions rating. ​
w​MPO — Metropolitan Planning OrganizationOrganization of several municipalities that serve areas with greater than 50,000 people for the purpose of planning in a more comprehensive manner; PA has 15 MPOs.​
xMuni Code — Municipal Code​​Code corresponding to the local municipality in which the bridge is located.
yADT — Average Daily Traffic​​This is the average number of vehicles that cross the bridge each day.

Revised 6/5/18