9468

• UCREFRP Catalog Number: 9468
• Author: Colorado Water Conservation Board.
• Title: Floodplain Information Report\
• USFW Year: 1995.
• Copyright Material: NO

TABLE 2
WHITE RIVER HYDROLOGIC ANALYSIS POINTS
POINT LOCATION DRAINAGE
AREA '(D.A.) D.A.
SOURCE
Wo MEEKER GAGE (2.5 MI U/S OF MEEKER)* 1024 miz a
W1 ABOVE PICEANCE CR 1204 miZ b
W2 BELOW PICEANCE CR 1856 miZ b
W3 ABOVE YELLOW CR 2018 miZ b
W4 BELOW YELLOW CR 2280 miZ b
W5 BELOW WOLF CR 2460 miZ a
W6 BELOW BOISE CR (GAGE SITE) 2530 miZ a
W7 BELOW SPRING CR 2620 mil b
W8 ABOVE DOUGLAS CR 2880 miZ a
W9 BELOW RANGELY AT D/S LIMIT OF
FEMA STUDY 3300 miZ a
W10 STATELINE 3552 miZ b
Sources of Drainage Areas
a Determined from published information and USGS gage values
b Determined from upstream USGS gage information combined with planimetering
* Not in study reach
Figure 4 shows the study reach and each of the hydrologic analysis points listed in Table 2.
2.5 Flood Characteristics
Major flooding in the White River basin has been primarily the result of rapid snowmelt
beginning as early as late April. Snowmelt flooding can continue into early July. Flooding can
also occur from rainfall on snowmelt and from ice jams in late winter or early spring. Due to
the small areal extent and limited duration of thunderstorms, they do not typically constitute a
major flood threat on streams as large as the White River. They do, however pose a problem for
some of the smaller tributaries in the White River basin.
Snowmelt flooding is characterized by moderate peak flows, large volume of runoff, long
duration, and diurnal fluctuation of flow. Flooding from general rainfall alone, though
uncommon on the White River, is characterized by high peak flows and moderate duration of
floodflows. Historically, ice jams, rain on snow, and local thunderstorms have caused the greatest
flooding around Rangely. Snowmelt floods of 1983 and 1984 produced 100-year flows at
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