FLOOD06408

• County: Weld
• Community: Windsor
• Stream Name: Big Thompson/South Platte/Cach la Poudre
• Basin: South Platte
• Title: Drainage Basins and Areas of Past Flooding in the Winsor Area, Colorado
• Date: 1/1/1971
• Prepared For: University of Colorado
• Prepared By: James Paul Walsh, Jr.
• Floodplain - Doc Type: Flood Documentation Report

12

information obtained often dated back to the turn of the century.

Long term residents described water depths, pointed out high water

marks and showed me places ,in the fields ,that had been innundated

by flood waters, The following are quotes from some of these inter-

views:

" the water in the draw was belly deep on the horses . ,
(Plate 1, north part of Lone Tree Creek)

"

" knee deep at the spot you' re standin'
southern part of Lone Tree Creek)

" (Plate 1,

". . . I knew a man that lived here from the turn of the century
and he, said ,there I d never been a severe flood on this creek,"
(Plate 1, The Slough)

One resident confirmed ,that Eaton Dray] (Plate 1) had flooded several'

times in 65 years. This fact was 'suggested by air-phOto interpreta-

tion but difficult to prove., from field evidence" '

Holocene deposits, where mapped, were e help "in defining flood

boundaries.. Swan (1972) hasmapped protohistoric',' historic, and mid-

dIe Holocene alluviums in the Cache la Poudre River basin (Fig,' 2)

and Whitney (1972) has mapped Holocene alluviums and fan deposits

in the Big Thompson River basin ,(Fig. 3). The stratigraphic position

of the deposits and their physical characteristics are identical,

and they are the same as the Piney Creek and post-Piney Creek

alluviums defined by Scott (1963) in the Kassler Quadrangli' (Fig. 4).

John Haberry (personal communication, 1973) believes that the Piney

and post-Piney Creek alluviums in the Perker Quadrangle (Naberry,"

'.

1972) correspond in location to areas that have recently flooded,

and Halde (1955, p, 244), in his work On the Louisville Quadrangle

wrote;