[Code of Federal Regulations]
[Title 23, Volume 1]
[Revised as of April 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 23CFR630.404]

[Page 149]
 
                           TITLE 23--HIGHWAYS
 
 CHAPTER I--FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
 
PART 630--PRECONSTRUCTION PROCEDURES--Table of Contents
 
                       Subpart D--Geodetic Markers
 
Sec. 630.404  Standards.

    (a) Highway purposes may best be served by the establishment of 
station markings for horizontal control along Federal-aid highway routes 
at spacings of three to eight kilometers (about 2 to 5 miles) and 
station markers for vertical control of spacings no closer than one 
kilometer. These requirements may be waived only with the approval of 
the Administrator.
    (b) Projects should be of sufficient scope to permit efficient use 
of field parties. Projects should extend at least 30 kilometers. 
Projects may be coordinated with adjoining States to attain greater 
efficiency.
    (c) Where geodetic station markers cannot be established inititally 
at points readily accessible from the Federal-aid route, or where 
unavoidable circumstances result in their being established within 
construction limits, supplemental projects may later be approved to set 
and survey markers at satisfactory permanent points, preferably within 
the right-of-way but at points where their use does not introduce 
traffic hazards.

Subparts E-F [Reserved]

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