FLOOD07371

• County: Jefferson
• Community: Arvada
• Basin: South Platte
• Title: Ralston/ Leyden Creeks Hydrology Report
• Date: 8/1/2002
• Prepared For: UDFDC
• Prepared By: Boyle Engineering Corporation
• Floodplain - Doc Type: Floodplain Report/Masterplan

List of Figures

Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11

Figure 12
Figure 13

List of Tables

Watershed Delineation - Overall Drainage Area
Watershed Delineation - Lower Ralston Creek Downslream Subbasins
Watershed Delineation - Lower Ralston Creek Upstream Subbasins
Watershed Delineation - Leyden Creek Lower Subbasins
Watershed Delineation - Van Bibber Creek Lower Subbasins
Ralston Watershed Routing Schematic
Ralston Watershed Routing Schematic Design Point 1 to Design Point 25
Ralston Watershed Routing Schematic Design Point 27 to Arvada/Blunn Reservoir
Ralston Watershed Routing Schematic Design Point 49 to Design Point 73
Ralston Creek Peak Discharge Profile with Ralston, Arvada/Blunn, and Leyden Reservoirs
Leyden Creek and Van Bibber Creek Peak Discharge Profile with Ralston, ArvadalBlunn,
and Leyden Reservoirs
Ralston Creek Peak Discharge Profile without Arvada/Blunn and Leyden Reservoirs
Leyden Creek and Van Bibber Creek Peak Discharge Profile without Arvada/Blunn and
Leyden Reservoirs Reservoirs

Table 1
Table 2
Table 3
Table 4
Table 5
Table 6
Table 7
Table 8
Table 9

CUHP Subwatershed Characteristics - Ralston Creek
CUHP Subwatershed Characteristics - Leyden Creek
CUHP Subwatershed Characteristics - Van Bibber Creek
One- and Six-Hour Rainfall Depths
Incremental Rainfall
SWMM Routing Element Parameters
Reservoir Routing Parameters
Selected Peak Flows
Reservoir Inflow/Outflow and Detained Volumes

Tables are presented in Appendix B,

CUHP and SWMM Input and Output Files on Attached CD-ROM

Figures are presented in Appendix A,