8 BULLETIN 198, U. S. DEPARTMENT OF AGBICULTUEE. 
August 13-16, 1911, 7.9 inches; February 9-15, 1908, 9.7 inches; and 
July 27-August 2, 1902, 9.2 inches. The heaviest 48-hour rainfalls 
were: August 13-14, 1911, 7.1 inches; February 13-14, 1908, 6^8 
inches; and July 30-31, 1902, 7.8 inches. The greatest 24-hour rain- 
fall recorded at Arkansas City occurred on April 4, 1911, when 5.6 
inches fell. Other heavy 24-hour storms were 5.5 inches on July 17, 
1906; 5.5 inches on August 13, 1911; and 5.1 inches on December 
27, 1904. From January, 1897, to December, 1912, there are recorded 
13 days when 3 inches or more fell in 24 hours, and 63 days when 2 
inches or more fell in a like period. The most intense rainfall on 
record at Arkansas City occurred on July 17, 1906, when 4.8 inches 
fell in 2 hours. 
Among the heaviest storm periods at Pine Bluff were: November 
16-21, 1906, 10.3 inches; May 4-6, 1905, 9.4 inches; and January 1-3, 
1897, 9 inches. The heaviest 48-hour rainfalls were: November 
16-17, 1906, 6.6 inches; May 4-5, 1905, 8.8 inches; and July 31- 
August 1, 1902, 6.9 inches. The heaviest 24-hour rainfalls on record 
at Pine Bluff are: 5.65 inches on January 21, 1906; 6.8 inches on May 
4, 1905, and 5.58 inches on January 3, 1897. Other unusually heavy 
24-hour storms recorded are 4.7 inches, on November 19, 1907, and 
4.7 inches on July 31, 1902. During the 16 years from 1897 to 1912 
there were 32 days when 3 inches or more fell in 24 hours, and 84 days 
when a rainfall of 2 inches or more was recorded.' 
STREAM GAUGING AND OTHER INVESTIGATIONS. 
During the spring of 1911 run-off investigations were made on- 
Boggy Bayou, the outlet for Desha County district No. 1. The area 
of this district is 165 square miles above the point where the discharge 
measurements were made. On April 4, 1911, occurred the heaviest 
24-hour precipitation on record. This caused a measured discharge 
of 1,815 second-feet, or a run-off of 11 second-feet per square mile 
from the district. In March and April, 1912, very high stages 
occurred in Boggy Bayou. During the latter part of March and April, 
the Mississippi River rose very rapidly, and probably about March 
27-29 the water began to flow from Cypress Creek and Wells Bayou 
to Boggy Bayou through Johnson Brake, Newman Slough, and Amos 
Bayou. The water begins to take this course when the Mississippi 
River backwater reaches an elevation of approximately 149 in 
Cypress Creek. It is probable that under present conditions the 
maximum discharge from Boggy Bayou due to precipitation alone 
seldom, if ever, exceeds that of April 4, 1911. 
Stream measurements were made on Cypress Creek at the Mem- 
phis, Helena & Louisiana Railroad bridge south of Watson in March, 
1912, until the backwater from the Mississippi River became too 
high. These measurements show that just before the river water 
