DRAINAGE 179 



character of the main part of this section of land and 

 other facts complicating its drainage, on the map have 

 been placed cross-section notes representing levels at 

 points 80 rods apart each way. The large slough shown, 

 running through the section north by northwest, is really 

 a long, narrow, shallow lake without outlet except over 

 the nearly level land at the north end. To drain this, 

 a large canal A-B, 16 feet wide and 8 to 10 feet deep, 

 was necessary, and was constructed running from the 

 north end of the lake a mile and a half across the nearly 

 level country to a river. This canal, if made 10 feet 

 deep, would be sufficient to drain the lake entirely, thus 

 transforming it from a shallow lake, which, in a dry 

 series of years, becomes entirely dry, into a hollow 

 which could be plowed nearly to the center or could be 

 used for meadow or pasture. Tile drains could then be 

 laid, placing the main outlets in this large drain. 



The surface drainage. The water on the main part of 

 the section may all be carried out in one of three ways. 



The lowest point of this farm being at the middle of 

 the north line of this section, at E, the flood water de- 

 livered at E could best be carried away from the farm 

 by an open ditch, E-S, running northeast, following the 

 natural depression across the neighboring farm, or could 

 be carried through a rather deep ditch, E-A, westward to 

 the canal at A, or it could be carried beyond the north- 

 east corner of the farm through heavy road ditches and 

 thence along the road either to the north or the east to 

 the adjacent lower areas at S or K. If carried eastward, the 

 water would flow into a new channel at K, and this might 

 require the consent of the adjacent landowners. If 

 carried northward, D to S, from the northeast corner 

 of the farm, it could be emptied into the channel of the 

 low area at S, which naturally would carry this water. 

 If the discharge were made at the center across the 

 adjacent farm toward S ; a ditch running northeast across 



