FLOOD04282

• County: Moffat
• Basin: Yampa/White
• Title: Interdisiplinary Paleoflood Investigation of the Elkhead River Basin and Vicinity near Craig
• Date: 11/4/1996
• Prepared For: CWCB
• Prepared By: USGS
• Floodplain - Doc Type: Floodplain Report/Masterplan

. CONTENTS (cont.)

I LLUSTRA TIONS................,............................,...........................................,....................(follow table)

1. Diagrammatic section across a stream channel showing a flood stage and various flood features
preserved as paleostage indicators.

2. Flood-bar deposits for. a.) Lefthand Creek near Boulder, Colorado with 1995 flood waters about 1-foot
below the peak stage; and b.) Little Thompson River near Estes Park, Colorado, upstream view of
paleoflood evidence associated with the 1976 Big Thompson Flood.

3a, Precipitation versus elevation with envelope curves for large stonns in Colorado.

3b. Precipitation versus elevation for northwestem and westem Colorado,

4. Location of the interdisciplinary paleoflood study area for northwestem Colorado.

5. Small, low-relief, flood-bar deposits for: a.) Elkhead Creek above North Fork Elkhead Creek, view is
downstream and towards left bank (table 1; site 96); b.) Elkhead Creek upstream from Elkhead Reservoir
. (table 1; site 88), view is upstream from County Road 76; c.) Elkhead Creek downstream from Elkhead
Reservoir (table 1; site 75), view towards left bank; d.) Elkhead Creek downstream from Elkhead
Reservoir (table 1; site 75), closeup view of figure 5b; e.) downstream view of Trout Creek at County
Road 179 bridge near Milner (table 1; site 62); f.) upstream view of Wilson Creek near Axial at County
Road 51 (table 1; site 48); g.) downstream view of Ute Gulch near mouth from State Highway 13 near
Hamilton (table 1; site 22). Note that although the basin is about 2 mi2, a gas pipe is located at the culvert
outfall, thus, had substantial flows occurred the gas pipe would show evidence or damage from flooding;
h.) upstream view of haybam over thalweg of an unnamed, 1 mi2 tributary to Williams Fork near Hamilton
just east of Deal Gulch, which has no evidence of significant flooding; i.) upstream view of flood-plain,
slack-water deposits for flood of May 30, 1995, in Fortification Creek just upstream from northem Craig city
limit (table 1; site 58),

6. Graph of channel cross section for Elkhead Creek above North Fork Elkhead Creek (see figure 5a and
table 1, site 96).

7, View of a.) downstream view of breach in Sage Creek Dam, which failed in the mid-1980s; b.) view
from ri9ht bank of woody-flood debris preserved on the upstream sides of trees on Sage Creek about 1
mile downstream from Sage Creek Dam,

. 8. Relation between 1995 high-water marks and paleostage indicators for. a.) Crystal River at Redstone,
Colorado; b,) Fortification Creek just upstream from Craig's northem city limit (see figure 51),

6