FLOOD06872

• County: Ouray
• Community: Ouray
• Stream Name: Uncompahgre River
• Basin: Gunnison
• Title: Sediment Transport Investigation for the North Ouray, Uncompahgre River Redevelopment Project
• Date: 4/5/1995
• Prepared For: Ouray
• Prepared By: Flo Engineering Inc.
• Floodplain - Doc Type: Educational/Technical/Reference Information

LIST OF TABLES

Table 3.1 a - Uncompahgre River tributary peak discharge and
runoff event values. water only.

.3.3

Table 3.1 b - Uncompahgre River tributary peak discharges and
runoff event volumes, bulked for debris

.3.3

Table 3.2 - Flow duration curve estimated for project site based on transfer of
USGS record for the Uncompahgre near Ridgway.

35

Table 3.3 - 2-year and 100-year hydrographs developed for the
Uncompahgre River at the project site

.3.7

Table 4.1 - Cross-sectional geometry p3rameters.

.4.3

Table 4.2 - Classification of Uncompah!Jfe River based on I"osgen stream types

.4.5

Table 6.1a - Hydraulic geometry coefficients and exponents, existing condition

.6.9

Table 6.1 b - Hydraulic geometry coefficients and exponents.
proposed project condition .

.6.9

Table 6.2a - Critical diameters for existi1g conditions, Uncompahgre River.

6.10

Table 6.2b - Critical diameters for proposed project condition, Uncompahgre River

6.10

Table 6.3 - Selected bed material sized for proposed project conditions

6.12

Table 6.4 - Average annual bed load vcnsport

6.12

Table 6.5 - Formative discharges

6.14

Table 6.6 - Two and 1 OO-year snowmelt runoff event sediment transport.

6.14

LIST OF FIGURES

Figure 2.1 - Project Location Map.

.2.2

Figure 5.1 a - Typical riffle cross section geometry

.5.2

Figure 5.1 b - Typical pool cross section geometry.

.5.2

Figure 6.1 a - Subsurface and bar bed material sieve analysis

.6.2

Figure 6.1 b - Surface bed material samples, Wolman Cou nt

.63

Figure A 1 - Water surface and thalweg profiles (2- and 100-year peaks).

.A-1

Figure A2a - Effective top width vs. river station (2-year peak) .

.A-2

Figure A2b - Effective top width vs river station (100-year peak)

.A-3