[Code of Federal Regulations]
[Title 23, Volume 1]
[Revised as of April 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 23CFR661.5]

[Page 323-324]
 
                           TITLE 23--HIGHWAYS
 
 CHAPTER I--FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
 
PART 661_INDIAN RESERVATION ROAD BRIDGE PROGRAM--Table of Contents
 
Sec. 661.5  What definitions apply to this regulation?

    The following definitions apply to this regulation:
    Construction engineering (CE) is the supervision and inspection of 
construction activities; additional staking functions considered 
necessary for effective control of the construction operations; testing 
materials incorporated into construction; checking shop drawings; and 
measurements needed for the preparation of pay estimates.
    Functional obsolescence (FO) is the state or process of being one in 
which the deck geometry, load carrying capacity (comparison of the 
original design load to the State legal load), clearance, or approach 
roadway alignment no longer meets the usual criteria for the system of 
which it is an integral part.
    Indian reservation road means a public road that is located within 
or provides access to an Indian reservation or Indian trust land or 
restricted Indian land which is not subject to fee title alienation 
without the approval of the Federal Government, or Indian and Alaska 
Native villages, groups, or communities in which Indians and Alaskan 
Natives reside, whom the Secretary of the Interior has determined are 
eligible for services generally available to Indians under Federal laws 
specifically applicable to Indians.
    Indian reservation road bridge means a structure located on an 
Indian reservation road (IRR), including supports,

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erected over a depression or an obstruction, such as water, a highway, 
or a railway, and having a track or passageway for carrying traffic or 
other moving loads, and having an opening measured along the center of 
the roadway of more than 20 feet between undercopings of abutments or 
spring lines of arches, or extreme ends of the openings for multiple 
boxes; it may also include multiple pipes, where the clear distance 
between openings is less than half of the smaller contiguous opening.
    Public authority means a Federal, State, county, town, or township, 
Indian tribe, municipal or other local government or instrumentality 
with authority to finance, build, operate, or maintain toll or toll-free 
facilities.
    Public road means any road or street under the jurisdiction of and 
maintained by a public authority and open to public travel.
    Structural deficient (SD) bridge means a bridge that has been 
restricted to light vehicles only, is closed or requires immediate 
rehabilitation to remain open.
    Sufficiency rating (SR) means the numerical rating of a bridge based 
on its structural adequacy and safety, essentiality for public use, and 
its serviceability and functional obsolescence.