San Juan River/Delores Division 7 Durango RICD 06CW09 Report on Design, Functionality

• File Number: 06CW09
• Description: Report on the Design, Functionality, and Physical Characteristics of the Durango Boating Park as it Relates to the RICD Application
• State: CO
• Basin: San Juan/Dolores
• Water Division: 7
• Date: 2/15/2006
• Author: Recreation Engineering and Planning 485 Arapahoe Ave Boulder, CO 80302 Gary M. Lacy, P.E.
• Title: Report on the Design, Functionality, and Physical Characteristics of the Durango Boating Park as it Relates to the RICD Application
• Water Supply Pro - Doc Type: Report/Study

r
a
0
N
A
U
C
High and Low flow design
-80 -60 -40 -20 0 20 40 60 80
Lateral Station (width)
Figure 15. Approximate geometry of the U- Structures proposed for the lower reach of the
Boating Park (Tease note that the overbank geometry is for illustrative purposes only).
This type of design creates critical flow at the crest of the control structure and captures,
controls and diverts the flows of the river for a variety of flows. Other similar structures
have been found to capture, control and divert flows across similar ranges of flows as are
expected in the Animas. Furthermore, these types of structures have been implemented in
similar rivers without creating an impact to the 100 year flood plain. These structures are
being designed, using the HEC-RAS software, to ensure that there will be no net negative
effect to the floodplain. It can be concluded from Figures 14 and 15 that the structures on
the upper reach of the boating park can capture, control and divert the flows of the Animas
River up to 1400 cfs. The lower structures will be able to capture control and divert the
flows of the Animas River up to flows of 1800 cfs, and, at flows of 900 cfs, will capture,
control, and divert while providing for the City's intended purpose. Due to the low and high
flow geometry these Structures are designed to function well during a range of flows.
33
`e.
C.
High Flow
0
Low Flow
-80 -60 -40 -20 0 20 40 60 80
Lateral Station (width)
Figure 15. Approximate geometry of the U- Structures proposed for the lower reach of the
Boating Park (Tease note that the overbank geometry is for illustrative purposes only).
This type of design creates critical flow at the crest of the control structure and captures,
controls and diverts the flows of the river for a variety of flows. Other similar structures
have been found to capture, control and divert flows across similar ranges of flows as are
expected in the Animas. Furthermore, these types of structures have been implemented in
similar rivers without creating an impact to the 100 year flood plain. These structures are
being designed, using the HEC-RAS software, to ensure that there will be no net negative
effect to the floodplain. It can be concluded from Figures 14 and 15 that the structures on
the upper reach of the boating park can capture, control and divert the flows of the Animas
River up to 1400 cfs. The lower structures will be able to capture control and divert the
flows of the Animas River up to flows of 1800 cfs, and, at flows of 900 cfs, will capture,
control, and divert while providing for the City's intended purpose. Due to the low and high
flow geometry these Structures are designed to function well during a range of flows.
33