RCW 46.68.124(2) provides that the county road administration board shall maintain the county road log for the purpose of computing estimated county road replacement costs and estimated annual maintenance costs for county fuel tax allocations. It further provides that each county shall submit changes, corrections, additions, and deletions (i.e., "updates") to the county road administration board which in turn are subject to validation prior to inclusion in the road log maintained by the county road administration board. This chapter describes the manner in which the county road administration board will administer this responsibility.

For this chapter the following definitions shall apply:

(1) County road log - The listing, by county, of all roads under county jurisdiction including their description, length, milepost identification, functional class, surface type, traffic volume, Federal Highway Administration MIRE FDE, and other administrative and physical inventory items that may be included.

(2) Asset management system - The suite of computer database application software by which the county road log data is updated and maintained by all counties and the county road administration board.

(3) Updates - Periodic changes to the county road log involving any or all of the included data elements.

(4) Control fields - Those fields within the county road log for which all updates need to be verified by the county road administration board prior to inclusion in the master county road log. The control fields are: Unique identifier (county road number, beginning milepost, ending milepost), jurisdiction, length, function class, surface type, surface width, structure type, right and left shoulder type, right and left shoulder width, and average daily traffic volume of all roadway elements such as through lane, other lane, bike lane, and shoulder.

(5) Master county road log - The combination of all county road logs as kept by the county road administration board containing the county road log of all counties as of July 1st of each year.

(6) Federal Highway Administration MIRE FDE – Federal Highway Administration Model Inventory Roadway Elements: Fundamental data elements.

Each county shall be responsible for maintaining current information regarding its road log and, no later than April 1st of each year, shall submit an updated road log for its complete road system with all data elements as of December 31st of the preceding year. This annual update must use the asset management system as prescribed by the county road administration board. All updates involving changes in control fields must include supporting documentation as required in WAC 136-60-050.

All control field updates will be subject to review, approval and acceptance (i.e., "validation") by the county road administration board. This process will involve reviewing the submitted documentation and conducting spot-checks as may be necessary. All such updates which are reviewed, approved and accepted by July 1st of each year will be entered into the master county road log. Noncontrol field updates will be entered into the master county road log file without review. The master county road log as of July 1st of each year will be utilized by the county road administration board for general informational purposes and:

(1) On each odd-numbered year, for computation of motor vehicle fuel tax allocations to the counties;

(2) Annually, for the computation of county arterial preservation program allocations to the counties;

(3) On each odd-numbered year, for computation of rural arterial program allocations to the rural arterial program regions; and

(4) For submittal of freight and goods route information to be included in required federal and state freight planning reports and studies.

Each update of a road log segment that involves a change in a control field (including additions or deletions of road segments) will be validated by the county road administration board. Documentation necessary to support control field changes is as follows:

Function class - Notice of FHWA approval from WSDOT.

Pavement type - Statement signed by county engineer with list of pavement type changes.

Responsible agency - The responsible agency is the legislative authority of the appropriate governmental agency with the authority to make the decision required for the action, or the state or federal government person authorized to approve changes.

Addition of mileage - Official document signed by responsible agency authorizing and describing the circumstances of the addition. For example, additions can occur through county legislative approval of new plat, construction/reconstruction on new alignment, or a change in jurisdiction.

Deletion of mileage - Official document signed by responsible agency authorizing and describing the circumstances of the deletion. For example, deletions can occur through legislative approval of vacations or a change in jurisdiction.

Traffic volume - Statement signed by county engineer with list of segments affected by change in traffic volume above or below 5,000 average daily traffic (ADT). If the ADT is over 5,000, the county shall also submit the traffic counts used to determine the ADT.

Freight and goods – Statement signed by county engineer with list of segments above 4,000,000 tons of freight annually and the traffic counts used to determine the annual tons of freight exceed 4,000,000 tons.

All changes to a control field will be updated in the approved GIS data set layer with sufficient detail to identify the location of each change. This GIS layer will then be forwarded annually to WSDOT for the new federal requirements for Highway Performance Monitoring System (HPMS) and Model Inventory Roadway Elements: Fundamental data elements (MIRE FDE).

Each county shall use the asset management system for the maintenance and updating of its county road log prescribed by the county road administration board. Each county shall be responsible for the purchase of additional licenses not otherwise provided by the county road administration board and installation of the requisite software on its own computer and/or mobile device(s). To assist each county to meet its eligibility requirements, the county road administration board shall provide technical support and training.

Any traffic counts used to validate that a segment has an ADT over 5,000 or has more than 4,000,000 tons of freight annually shall be updated by December 31, 2025. After December 31, 2025, traffic counts for ADT over 5,000 validation shall be updated a minimum of every two years and a minimum of every four years for annual freight tonnage more than 4,000,000 tons.