OVERFLOW OF RED RIVER OF THE NORTH. 
23 
Table 
. — Recorded and estimated future maximum discharges from streams 
on Red River watershed — Continued. 
Station. 
Water- 
shed 
area. 
Period 
of meas- 
ure- 
ment. 
During summer floods. 
During spring floods. 
Stream. 
Maxi- 
mum 
re- 
corded 
dis- 
charge. 
Estimated 
future 
maximum- 
Muxi- 
mum 
re- 
corded 
dis- 
charge. 
Estimated 
future 
maximum- 
Dis- 
charge. 
Run- 
off. 
Dis- 
charge. 
Run- 
off. 
Mouth 
Sq. mi. 
1,270 
425 
Years. 
Scc.-ft. 
Sec.-ft. 
3,810 
1,700 
6,740 
1,950 
5,400 
10, 800 
6,650 
15,960 
17, 355 
36,057 
2,115 
2, 060 ' 
2,280 
2,212 
1,460 
3,060 
2,540 
2,925 
2,370 
3,984 
4,638 
39, 485 
Sec.-ft. 
per 
sq. mi. 
" 3 . 
4 
4 
1 
5 
3 
5 
3 
3 
1.4 
3 
' 2 
3 
2.5 
4 
4 
4 
3 
3 
1.2 
1.2 
1.1 
Sec.-ft. 
Sec.-ft. 
3. 810 
Sec.-ft. 
per 
sq. mi. 
3 
Sandhill River. . . 
..do 
6 
Small streams . . . 
Sheyenne River 
to Grand Forks. 
Outlet 
1,685 
1,950 
1, 080 
3,600 
1,330 
5,320 
R. 785 
' "4,6m 
7,040 
3,990 
14,400 
~ 43," 666" 
1,200 
3, 870 
"46,'i80" 
6,740 
2,925 
4,320 
9,000 
6,650 
15, 960 
17, 355 
51, 510 
2,115 
3,090 
2, 660 
2,655 
1,460 
3,060 
2,540 
3,900 
3,160 
4,980 
5,797 
61, 022 
4 
Red Lake 
1.5 
Thief River 
Red Lake River 
and Thief 
River. 
Clearwater River 
Thief River Falls . 
do 
Red Lake Falls... 
9 
10 
9 
19 
4,100 
7,600 
6,700 
14, 400 
4 
2.5 
5 
3 
Do 
East Grand Forks. 
3 
Red River 
Turtle River..... 
Grand Forks, N. | 25,755 
Dak. 
Mouth 705 
38 
22, 360 
2 
3 
do 
1,030 
760 
885 
3 
Snake River 
do 
3.5 
Park River 
do 
3 
Tamarac River . . 
r do ! 365 
Grand Forks to | 765 
Dravton. 
Hallock i 635 
Mouth 975 
Drayton to Emer- 790 
son, Manitoba. 
Neche 3,320 
Pembina 3. 865 
4 
Small streams . . . 
4 
Two Rivers 
Do 
4 
634 
4 
4 
4 
Pembina River. . 
Do 
12 
2,500 
1.5 
1.5 
Red River 
Intern at ional 
boundary. 
35,895 
8 
20, 121 
1.7 
PRECIPITATION. 
As it was found that precipitation records covered longer periods 
of time and were available for many more localities than were 
stream-flow records, a study of precipitation was undertaken for the 
purpose of supplementing the data on run-off. 
The official records of the United States Weather Bureau were used 
as the basis for the precipitation studies. The investigation devel- 
oped that total annual, total and maximum monthly, and maximum 
and excessive daily and storm precipitation, are of much greater 
significance in the project than are mean or average quantities and 
rates. It developed also that accumulations of precipitation in the 
forms of snow and ice are important factors in estimating stream 
discharge for March and April. 
Records of monthly and annual precipitation at Breckenriclge, 
Minn., and Pembina, N. Dak., are available for 48 years (18T2 to 
1919) and at Moorhead, Minn., for 39 years (1881 to 1919). Other 
weather-observation stations have been- established from time to time 
