FLOOD08576

• County: Larimer
• Stream Name: Big Thompson River, Little Thompson Rivre
• Basin: South Platte
• Title: Flood Plain Information - Big Thompson and Little Thompson River
• Date: 6/1/1977
• Prepared For: Larimer, Boulder Counties
• Prepared By: US Army Corps of Engineers - Omaha
• Floodplain - Doc Type: Floodplain Report/Masterplan

FLOOD SITUATION

SOURCES OF DATA AND RECORDS
Stream gaging records from the United States Geological
Survey stream gages on the Big Thompson and Little Thompson Rivers
were used in the hydrologic analysis for this study. The gage
locations and pertinent data pertaining to them are shown in table
2.

Stream

Big Thompson
River

Big Thompson
River

Li tt I e
Thompson River

Table 2
Stream Gaging Data

Ga!1e Location

Approximate
Dral naQe Area
(sq. mi.)

304

Gal:! I nQ Record

Continuous since
1887 except for
periods between
1892 to 1895,
1904 to 1926,
1933 to 1938, and
1949 to 1951.

Continuous since
1914 except for a
period from 1915
to 1927.

Continuous since
1929 except for a
period between 1930
and 1947. (Dis-
continued in 1961.)

Information on past floods was obtained from Corps of
Engineers flood records, Larimer County, the U. S. Geological Survey,
the Colorado Water Conservation Board, and local newspapers.

At mouth of canyon,
500 feet upstream
from Handy Ditch
diversion dam and
6 mi les east of
Drake.

On left bank 0.7
mile upstream from
highway bridge, 1.6
miles upstream from
mouth, and 4 miles
west of La Salle.

828

At mouth of canyon,
7.5 miles southwest
of Berthoud.

101

II