10 
COLORADO EXPERIMENT STATION. 
§ 10. The total loss given in Table 2 is the combined loss from 
seepage and evaporation. The records, given later in the bulletin, 
form the basis of the estimated evaporation given in the column so 
headed in the following table. The difference, unaccounted for by 
evaporation, is the loss due to filtration or seepage. In forming this 
table, only those cases where a loss was shown have been taken. It 
is noticeable that there are many cases in which the total loss was 
less than the amount of evaporation ; in other w^ords, the reservoirs 
were gaining water from the run-off of the w^ater sheds running into 
the lake, or from seepage entering the lakes, or perhaps, in a few 
cases, from water in the supplying ditches, which had been reported 
dry. This is shown in the following table : 
TABLE III.— LOSSES DUE TO SEEPAGE ALONE. 
Name of Lake. 
Total Loss— Inches. 
Evaporation 
( esti m ated ) — I n ches . 
Remainder (seepage) 
—Inches. 
j No. Days. 
Seepage per Day- 
Inches 
1 Per Year, at Same 
1 hate. 
Rigden Lake, 1896 
4.45 
2.39 
2.06 
31 
.067 
24.25 
4.03 
2.58 
1.45 
22 
.066 
24 06 
Loomis Lake, 1897 
1.36 
2 43 
1.07 gain 
31 
Gain 
Gain 
1.04 
.85 
.19 
11 
.017 
6.30 
3.82 
2.97 
.85 
31 
.027 
10.01 
No Name Lake, 1896 
2.70 
1.70 
1.00 
21 
.048 
17.38 
5.30 
3.66 
1.64 
33 
.050 
18.16 
.23 
2.43 
2 . 20 gain 
31 
Gain 
Gain 
.78 
.93 
.15 gain 
12 
Gain 
Gain 
1897 
4.44 
2.97 
1.47 
31 
.0475 
17.31 
Rocky Ridge Lake 
3.87 
3.66 
.21 
33 
.006 
2.32 
Res. No. 2, North Poudre Canal 1896 — 
1.99 
1.63 
.36 
21 
.016 
6.26 
1.98 
3.66 
1.68 gain 
34 
Gain 
Gain 
1897 
1.34 
2.20 
.86 gain 
31 
Gain 
Gain 
Demmel Lake, 1896 
2 30 
1.63 
.67 
21 
.032 
13.21 
4.56 
3.66 
.90 
34 
.0265 
9.67 
1897 
1.15 
2.20 
1.05 gain 
31 
Gain 
.56 
.93 
.37 gain 
12 
Gain 
Res. No. 3, North Poudre Canal. 1896. .. 
10.56 
1.63 
8.93 
21 
.42 
155.00 
1897 
. 90 gain 
Res. No. 4, North Poudre Canal, 1897. .. 
1.13 
2.43 
1 . 30 gain 
Gain 
.56 
.93 
37 gain 
Gain 
1.08 gain 
2.97 
4.05 gain 
For the whole winter, from the records of the Canal company, there must have been gain 
from inflow. 
Demmel Lake 
6.19 
10.26 
4.07 gain 
127 
Gain 
Res. No. 3, North Poudre Canal 
6.19 
10.26 
4.07 gain 
127 
Gain 
Res. No. 4, North Poudre Canal 
8.19 
10.26 
2.07 gain 
127 
Gain 
§11. It appears that the leakage from these particular reservoirs 
is very small. After allowing for evaporation, we find that several 
lakes must have gained water from outside sources, either by some 
