LIMNOLOGICAL OBSERVATIONS IN THE UPPER MISSISSIPPI. 363 
Table 4. — Stages of the upper Mississippi River, 1911-1920, at eight points from St. Paul, Minn., to 
Keokuk, Iowa. 
HIGHEST GAUGE READINGS. 
Eleva- 
tion of 
gauge 
zero 
above 
mean 
Gulf 
level. 
1911 
1912 
1913 
1914 
1915 
Date. 
Gauge 
read- 
ing. 
Date. 
' iaiiL-c 
read- 
ing. 
Date. 
Gauge 
read- 
ing. 
Date. 
Gauge 
read- 
ing. 
Date. 
Gauge 
read- 
ing. 
684. 14 
670. 36 
639.9 
605. 16 
541. 94 
518. 82 
502.23 
477. 35 
4.8 
4.9 
9.9 
13.5 
11.2 
10.2 
May 10.... 
. . .do 
May 13 
May 18, 19. 
Mar. 30.... 
Apr. 5,6... 
11.2 
12.5 
11.7 
10.9 
12.2 
13.35 
May 27, 28. 
May 27 . . . 
Apr. 8,9... 
Apr. 14.... 
Mar. 27, 28 
Mar. 29, 30. 
/Mar. 30.... 
/July 23 
Mar. 30 
7! 3 
9.2 
11.5 
12.8 
11.7 
10.8 
12.7 
13.5 
July 3, 4... 
, July 2-4. . . 
July 3-5. . . 
July 8-10. . 
July 14, 15. 
June 23.... 
Jan. 16-17, 
19-20, 24-28 
June 24.... 
12.2 
12.7 
12.5 
13.3 
10.65 
9.32 
j.13.4 
11.2 
Apr 5 
10.5 
a 8 
11.2 
9.5 
10.41 
14.42 
13.75 
Hastings, Minn 
Winona, Minn 
Prairie du Chien, 
Wis. 
Rock Island, IU 
Burlington, Iowa 
Fort Madison, Iowa . . 
Keokuk, Iowa 
Oct. 10,20. 
Oct. 12.... 
Oct. 17.... 
Oct. 22,23. 
Feb. 20.... 
Apr. 7 
Apr. 15-17. 
Apr. 20, 21. 
June 3-5, 7. 
June 8 
Dec. 29.... 
Eleva- 
tion of 
gauge 
zero 
above 
mean 
Gulf 
level. 
1916 
1917 
1918 
1919 
1920 
Date. 
Gauge 
read- 
ing. 
Date. 
Gauge 
read- 
ing. 
Date. 
Gauge 
read- 
ing. 
Date. 
Gauge 
read- 
ing. 
Date. 
Gauge 
read- 
ing. 
St. Paul, Minn 
Hastings, Minn 
Winona, ivfinn 
684. 14 
670. 36 
639.9 
605. 16 
541.94 
518. 82 
502.23 
477.35 
Apr. 6-9... 
Apr. 8 
Apr. 27.... 
May 1 
May 5 
May 9 
/Feb. 1-3... 
(May 9, 10.. 
May 14. . . . 
16.6 
15.3 
16.2 
18.3 
15.9 
14.2 
}15.9 
16.7 
Apr. 8 
Apr. 9 
Apr. 12.... 
Apr. 15, 16. 
Apr. 21.... 
June 17.... 
June 17, 18. 
June 13... . 
16.0 ‘ 
14.9 
13.2 
14.2 
12.35 
11. 62 
15.05 
14.9 
Mar. 24, 25 
June 6 — 
...do 
June 10... 
June 14... 
June 12... 
Dec. 29... 
June 12... 
7.5 
7.8 
10.5 
12.5 
10.3 
12.9 
15.9 
16.7 
Apr. 22 
Apr. 23.... 
Apr. 16, 17. 
Apr. 20, 21. 
Apr. 25.... 
May 8 
May 7,8... 
...do 
13.8 
13.0 
12.'7 
15. 1 
13.7 
13.79 
16.65 
17.15 
Mar. 29.... 
...do 
/Mar. 31.... 
\Apr- 1 
Apr. 4,5... 
Apr. 8,9... 
Apr. 11.... 
Apr. 10.... 
Apr. 21.... 
13.6 
14.1 
|l5. 9 
19.6 
17.00 
14.79 
16.80 
16.70 
Prairie du Chien, 
Wis. 
Rock Island, 111 
Burlington, Iowa 
Fort Madison, Iowa.. 
Keokuk, Iowa 
LOWEST GAUGE READINGS. 
Eleva- 
tion of 
gauge 
zero 
above 
mean 
Gulf 
level. 
1911 
1912 
1913 
1914. 
1915 
Date. 
Gauge 
read- 
ing. 
Date. 
Gauge 
read- 
ing. 
Date. 
Gauge 
read- 
ing. 
Date. 
Gauge 
read- 
ing. 
Date. 
Gauge 
read- 
ing. 
St. Paul, M inn 
684.14 
670. 36 
639. 90 
}605. 16 
541. 94 
518. 82 
502.23 
477. 35 
/Feb. 24.... 
\Aug.28... 
/Mar. 10.... 
\Aug. 30, 31. 
/ Jan. 5, 6... 
\ July 27-30. 
July 31.... 
July 28 . . . 
July 25.... 
-0.7 
.4 
.0 
it 
.5 
.65 
.05 
>Dec. 7 
-0.1 
.0 ■ 
.2 ■ 
},i 
1.7 
.5 
/Feb. 1 
\Mar.6 
/ Jan. 4, 21- 
\ 29 
/Feb. 2 
\Dec. 30,31. 
Dec. 21.... 
Dec. 31.... 
Feb. 23.... 
Jan. 4 
j~ 0. 2 
.5 
} » 
.95 
.45 
1.0 
-1.5 
Mar. 16, 17. 
Jan. 7 
Jan. 8-12.. 
Nov. 22... 
Jan. 1-3 .. . 
Dec. 20 — 
Mar. 25.... 
Jan. 3 
0.3 
.07 
1.3 
2.0 
2!? 
1 10. 6 
-1.4 
Feb. 21.... 
1.6 
2.3 
3.3 
1.75 
4.4 
10.7 
1.00 
Hastings, Minn 
Winona, M^ nn 
iDec. 2, 5, 10 
j-Dec. 12.... 
(Nov. 16, 
-{ 27-30. 
(Dec. 1-8... 
Dec. 16.... 
Dec. 14.... 
Jan. 31.... 
Jan. 29.... 
Sept. 7-9.. 
Dec. 21.... 
Prairie du Chien, 
Wis. 
Rock^sland^Ill 
Fort Madison, Iowa. . 
Keokuk Tnwai. 
May 31.... 
Jan. 11 
Feb. 24.... 
Eleva- 
tion of 
gauge 
zero 
above 
mean 
Gulf 
level. 
1916 
1917 
1918 
1919 
1920 
Date. 
Gauge 
read- 
ing. 
Date. 
Gauge 
read- 
ing. 
Date. 
Gauge 
read- 
ing. 
Date. 
Gau^e 
ing. 
Date. 
Gauge 
read- 
ing. 
St. Paul, Minn 
684. 14 
670. 36 
639.90 
605. 16 
541. 94 
518. 82 
502.23 
477. 35 
Nov. 26... 
Dec. 14 
Dec. 1-5... 
Dec. 9-11.. 
Dec. 15.... 
Dec. 24 
Dec. 24,25. 
Dec. 17.... 
1.7 
2.0 
2.3 
3.6 
2.3 
4.2 
12.0 
1.0 
Dec. 5 
-1.0 
.0 
1.2 
2.3 
1.2 
3.10 
10.6 
.25 
Oct. 21.... 
Oct. 21, 22. 
Oct. 19, 20. 
Oct. 17,27. 
Oct. 19.... 
/Feb. 10.... 
\Oct. 20 
Feb. 10 — 
Oct. 20 
-0.7 
- .3 
19 
1.1 
3.16 
6.2 
9.95 
.5 
Mar. 8 
0.3 
1.0 
1.6 
2.5 
.4 
5.06 
} 13.0 
.35 
Dec. 18 
Dec. 19-20. 
Dec. 20.... 
Oct. 1, 3, 
14,24. 
Dec. 21-22. 
Feb. 28-29. 
Mar. 3,4... 
Dec. 28.... 
-0.2 
.7 
1.0 
2.4 
.7 
5.4 
12.20 
Hastings, Minn 
Winona, Minn 
Dec. 4, 8... 
Dec. 7,8... 
Oct. 11.... 
Dec. 9 
Dec. 19 
...do 
Dec. 20 
Mar. 7 
Feb. 23-25. 
Sept. 29... 
Mar. 2 
} Jan. 10.... 
/Jan. 10,11. 
\Dec. 13.... 
Mar. 9 
Prairie du Chien, 
Wis. 
Rock Island, 111 
Burlington, Iowa 
Fort Madison, Iowa. 
Keokuk, Iowa 1 
i Keokuk Dam effective after May, 1913. 
