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Other FEDERAL MONUMENTS -- i.e., USGS, NGS, USC&GS -- are not to be disturbed in any way until sufficient and proper notice has been given to the proper authorities. When such markers are encountered and their removal is required prior to the receipt of authorization from NOAA, they shall, prior to removal, be referenced to a new and secure location. A detailed description of the die marks or legend and the new location, in relation to the old location, shall then be forwarded to the proper authorities. If the Federal mark is a triangulation station, mark, or tower, the Department's forces will normally not relocate it. Since removal must be performed by Federal forces, contact should be initiated by the District Engineer by telephone and confirmed by letter.

Section corner markers and witness trees which are located within the construction limits shall be referenced prior to construction and the information recorded in an alignment book. The Arkansas Minimum Standards for Land Surveys requires that replacement monuments must be certified by a Registered Land Surveyor. Therefore, the Engineer of Surveys Division should be contacted to review and approve the proposed referencing procedure before the original marker is disturbed. The County Surveyor shall be notified, in writing, that the marker has been referenced and that the temporary references are available in the Resident Engineer's office. Copies of this correspondence shall be sent to the District Engineer, the State Construction Engineer, and the Engineer of Surveys Division.

After construction is complete, the marker shall be replaced in its original location, provided there is no interference with highway or maintenance operations. In the event the original location interferes with the Department's operations, the original location shall be referenced by burying three concrete monuments on or near the right of way line. These monuments should protrude approximately 1 inch above the ground, and should be so located that they are not likely to be disturbed by maintenance operations. An "X" shall be chiseled in the top of each monument to denote the point from which the reference measurements are made. These concrete monuments should be approximately 6 inches in diameter (or square). Old style concrete right of way markers can be used.

The horizontal distances from each of the reference markers to the location of the corner shall be determined and recorded. In addition, the internal horizontal angles from the R/W line to the corner at each reference marker may be measured and recorded. The reference markers should be spaced so that the smallest angle of the triangles formed is at least 30°. In no case should an angle be less than 15°.

Upon completion of the permanent installation of the section markers or references, the Resident Engineer shall make a sketch of the completed installation and forward it, along with a narrative description of the location (e.g., 135 feet NW of 36" x 84' RCP w/hdwls, 3.6 miles SE of intersection of SH 19 and SH 20, on North side of highway) to the Engineer of Surveys Division. The Engineer of Surveys Division will certify that the replacement marker is at the same location as the monument set by the original surveyor. Surveys will then forward this information to Right of Way Division. Copies of the transmittal letter shall be furnished to the District Engineer, the Right-of- Way Division, and the State Construction Engineer. (See sample sketch in Figure 107-3.) The Right of Way Division will have the new description of the corner or references recorded in the appropriate offices of the county in which the project is located.

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