26 



The area to be irrigated must be given, where not measured an estinriate must be made, 

 and where only part of a sul)di vision is to be watered, tlie ' stimate must gi\e tlie acreage in 

 eacii -JO a^'res of these fractional subdivisions, with t ho n'uiilx'r of acres marked in each. 



The law requires applications to be made and approved by the State engineer before work 

 begins. No application which states that work has l)egun or has been completed will be 

 approved. 



MAPS. 



Eacii .■ipphcation must l)e accompanied by two maps, one of which must be on tracing 

 linen. 



These maps must be neatly and accurately drawn with India ink to a scale of 2 inches to 

 the mile, and on sheets not less than 9 by 12 inches. 



They must .show the location of the head gate by courses and distances from .some govern- 

 ment corner. They must .show the actual location of the ditch or canal, and where govern- 

 ment survey lines are crossed, the distance to the nearest corner must be given. (Where 

 corners can not be found, give the location of line by courses and distances.) 



The map must show the course of and name of stream, from, which water is taken; the 

 location and area of land to be irrigated, or place where v>fater is to be used for other purposes. 

 (This may be done by marking the boimdaries or by coloring the areas.) 



Whenever the canal line crosses streams or other ditches the location of such crossings 

 must be shown, and such intersecting streams and ditches must be marked by ink of a dif- 

 ferent color. 



Maps must contain the name of the ditch, canal, or reservoir, and the post-office of the 

 surveyor, with date of survey. 



RESERVOIRS AND DAMS. 



Applications for reservoirs and dams nnist be accompanied by a map in duplicate on 

 tracing linen, showing the dimensions and location of the reservoir. The dam must be tied 

 to some government corner by courses and distances. 



Plans of dams, cribs, or embankments must be drawn on longil udinal scale of not less than 

 1 inch to 200 feet and for cross sections of not less than 1 inch to 20 feet. Timber, brush, and 

 stone, where u.sed, shall be shown in detailed plans, the scale of which .shall be 1 inch to 4 

 feet. The plans for outlet and waste ways for reserv^oirs shall be drawn on a scale of 1 inch 

 to 4 feet, and are required ^or all dams over 5 feet higli in a miming stream or for any other 

 dam over 10 feet high. 



The maps of reservoirs shall show th(> total area to be sul)merged and enough levels to 

 permit of computing their capacity. 



For earth dams the slope nmst not be less than 3 to I for tlie front or water side, and 2 to 1 

 for the back. 



Note. — Lands mav be shown by tinting witli a colored pei'cil on the dull side of the trac- 

 ing linen and this rubl)ed to an even tint l)y means of a medium hard nil>ber eraser. Where 

 an enlargement application is made, the lands under exisHng rights through the same ditch 

 should be shown in different colors. Colors which will not blueprint well should not be used. 

 The preferred colors are: Green, orange, red, and yellow. Lettering on a map .should be 

 sparing and superfluous matter should not be placed thereon. Indelible pencil or a type- 

 writer should not be used on tracing linen, since the oil in the cloth will cau.se these colors to 

 •spread and in time it becomes almost obliterated. The affidavit of the surveyor should be 

 neatly lettered on the map. In preparing an application the 10-acre subdivision in which 

 the head gate is situated should be stated and the bearing and distance to the nearest govern- 

 ment corner should be given. In case of an enlargement, if the applicant is the owner of the 

 ditch to be enlarged, he should so state, if not, the written consent of the owners nuist 

 accompany tlie applicat ion. The following form for consent to enlarge may be used. 



, 190—. 



I (or we) , the sole owner of the ditch taking water from , under per- 

 mit No. , do hereby give ray (or our) free and voluntary consent to the enlargement or 



