24 
LOSSES FROM CANALS BY SEEPAGE. 
The average loss amounts to .80 cu. ft. per sec. As the 
amount turned into the ditch averaged 4.49 cu. ft. per sec. 
the loss amounted to 18 per cent, on this basis, or 22 per 
cent, by taking the average of the losses by days. 
As the surface of the water of the canal was about three 
acres in area, this amount of loss corresponds to a depth of 
slightly over 6 inches per day. 
The variations in the loss on different days is noticea- 
ble. A part of the difference is due to the fact that a fluctu- 
ation in the amount of water in the canal does not affect 
the lower weir until a couple of hours after the upper weir 
has been affected, and as the civil day was used with both 
weirs, some discrepancy is due to this fact. The days when 
the changes were noticeable were excluded from the table 
though the effect is not thereby entirely elminated from the 
individual day’s record. 
The days when water was used through the small late- 
ral above the lower weir could easily be detected by com- 
parison of the records at the two weirs, and are likewise ex- 
cluded from the table. 
Showers affected the record to some extent in 1894, 
and while the amount of rain entering the canal is unknown, 
there is reason to suppose that its effect caused the apparent 
losses to be less than in 1893, whose record for the time re- 
ported was free from such disturbance. 
RECAPITULATION OE CASES OF LOSS. 
Pleasant Valley and Lake Canal: Lossofii.46 
sec. -ft. in 23 miles, after being increased 
by over 8 ft. gain. Depth. 
Average depth of loss, with low head 0.66 ft. 
PLxcluding gains, loss of over i.oo “ 
At places, over : . . 5.00 
North P'arm Lateral: Lost 125 ft. in 9 miles, 
with head of 200 sec. ft. 
Average depth of loss 0.80 
With head of 90 ft. lost 5.28 sec. ft. or depth. 0.43 “ 
Fort Morgan Canal i to 2.60 
Hoover Ditch i.oo 
Greeley No. 3, special case 30.00 
‘‘ “ “ July 20, 1898 18.00 
North Poudre Lateral 6 to i.oo 0.80 
Muzza Canal, Italy 1.70 “ 
Naviglio Grande 0.80 
Martesana i-50 “ 
Centreville snd Kingsburg 6.00 
