ROAD AND BRIDGE ASSETS
The Road and Bridge Department is responsible for the inventory and assessment of Summit County’s road network assets. These assets are identified and located using Global Positioning Systems (GPS) equipment. Attribute data of the assets is gathered during the inventory process, then saved in an ArcView Map and a series of Access databases, referred to as the Summit County Asset Management System. The Summit County Asset Management System also serves as the rating system for the various assets, and is used for predicting future maintenance events.
Summit County’s road network consists of the following assets: Road Surfaces, Bridges, Culverts, Guardrails, Signs and Curb and Gutters.(1)
A condition assessment of the above referenced assets was completed in 2005. To review the full report, click here.
Table 1 – OCI Ratings |
|
Legend |
|
81 to 100 |
Very Good |
61 to 80 |
Good |
41 to 60 |
Fair |
21 to 40 |
Poor |
0 to 20 |
Very Poor |
Each of the assets were inventoried and rated on a numeric scale called the Overall Condition Index (OCI) to convey the condition of the asset. The OCI is derived from a visual inspection process that considers distresses or other defects.(2) A 100-point scale is used with 0 being a Very Poor Condition and 100 being a Very Good condition. (See Table 1)
Table 2 - Road Network Asset OCI - 2005 |
|
Road Network Asset |
Average OCI |
Road Surface |
74 |
Bridges |
83 |
Signs |
55 |
Culverts |
62 |
Guardrail |
93 |
TOTAL AVERAGE |
73 |
Once a condition assessment of the asset is completed, the replacement cost and the current value of the asset can be calculated in the following manner:
Replacement Cost = the unit cost of the asset x number of asset units, and
Current value = the Replacement Cost x the OCI Rating (expressed in decimal form) of the asset.
Table 3 - Road Asset Network Summary - 2005 |
|||||
Asset |
Count |
Units |
Historic Cost |
Replacement Cost |
Current Value |
Roads |
145.54 |
Miles |
$28,512,181.27 |
$29,847,338.23 |
$20,787,531.64 |
Signs |
2138 |
Each |
$54,666.20 |
$15,712.15 |
|
Culverts |
876 |
Each |
$3,354,002.35 |
$2,136,982.85 |
|
Guardrail |
53649.5 |
Lin-Ft. |
$1,153,637.26 |
$1,055,790.15 |
|
Bridges |
7 |
Each |
$1,531,232.11 |
$3,582,807.72 |
$681,489.94 |
TOTAL |
$30,043,413.38 |
$37,992,451.76 |
$24,677,506.73 |
||
Table 2 represents the average OCI for the each of the road network assets and Table 3 is a summary of the road network assets and their respective costs.