[Code of Federal Regulations]

[Title 23, Volume 1]

[Revised as of April 1, 2005]

From the U.S. Government Printing Office via GPO Access

[CITE: 23CFR630.404]



[Page 143]

 

                           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]