Wyo. Stat. § 41-4-510
The engineer may require, in addition to the maps and plats above described, a plan showing cross sections at a sufficient number of points to show the different forms which the ditch, when completed, will take, and showing what proportion of the water is to be conveyed in excavation and what proportion to be conveyed in fill. These plans shall be drawn, or be capable of being drawn and printed if submitted electronically, on a horizontal and vertical scale of one (1) inch to twenty (20) feet. Plans of any dams, cribs, embankments or other proposed work to obstruct any river, stream, lake or pond, or other source of water supply, shall be drawn on a longitudinal scale of not less than one (1) inch to two hundred (200) feet, and for cross sections on a scale of not less than one (1) inch to twenty (20) feet; and shall show what material is intended to be used and placed in such work. Timber, brush, stone or other material except earth used in such works shall be shown in detail on a plan, the scale of which shall not be less than one (1) inch to four (4) feet. The maps of all proposed reservoirs shall show the surface of the ground under water, and a sufficient number of lines of level shall be shown so that the contents of the reservoir or basin may be approximately determined. If the levels shall be shown by contour lines they shall be on a scale sufficiently large to show vertical levels not exceeding five (5) feet, and with all such reservoir plans there shall be furnished a plan, on a scale of not less than one (1) inch to four (4) feet, showing the method of providing a wasteway for such reservoir, and method of drawing off the water from such reservoir or basin. If the state engineer deems it necessary he may require the submission of complete plans and specifications for his approval. He may also require the filing of field notes of canal and reservoir surveys.
W.S. 41-4-510