25 CFR 169.6 - Maps.
(a) Each application for a right-of-way shall be accompanied by maps of definite location consisting of an original on tracing linen or other permanent and reproducible material and two reproductions thereof. The field notes shall accompany the application, as provided in § 169.7. The width of the right-of-way shall be clearly shown on the maps.
(b) A separate map shall be filed for each section of 20 miles of right-of-way, but the map of the last section may include any excess of 10 miles or less.
(c) The scale of maps showing the line of route normally should be 2,000 feet to an inch. The maps may, however, be drawn to a larger scale when necessary and when an increase in scale cannot be avoided through the use of separate field notes, but the scale must not be increased to such extent as to make the maps too cumbersome for convenient handling and filing.
(d) The maps shall show the allotment number of each tract of allotted land, and shall clearly designate each tract of tribal land affected, together with the sections, townships, and ranges in which the lands crossed by the right-of-way are situated.