Section 650.515 - Inventory(a)Preliminary inventory. Each State, Federal agency, or tribal government shall collect and submit the inventory data items described in the Specifications for the National Tunnel Inventory (incorporated by reference, see§ 650.517 ) for all tunnels subject to the NTIS by December 11, 2015.(b)National Tunnel Inventory. Each State, Federal agency, or tribal government shall prepare, maintain, and make available to FHWA upon request, an inventory of all highway tunnels subject to the NTIS that includes the preliminary inventory information submitted in paragraph (a) of this section, reflects the findings of the most recent tunnel inspection conducted, and is consistent and coordinated with the Specifications for the National Tunnel Inventory.(c)Data entry for inspections. For all inspections, each State DOT, Federal agency, or tribal government shall enter the appropriate tunnel inspection data into its inventory within 3 months after the completion of the inspection.(d)Data entry for tunnel modifications and new tunnels. For modifications to existing tunnels that alter previously recorded data and new tunnels, each State DOT, Federal agency, or tribal government shall enter the appropriate data into its inventory within 3 months after the completion of the work.(e)Data entry for tunnel load restriction and closure changes. For changes in traffic load restriction or closure status, each State DOT, Federal agency, or tribal government shall enter the data into its inventory within 3 months after the change in status of the tunnel.