FLOOD06560

• County: Denver
• Basin: South Platte
• Title: River Hydrology, Brown Ditch Weirs
• Date: 5/19/1986
• Prepared By: Wright Water Engineers, Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

2

marily for the portion of the South platte River approximatly two miles
downstream from Chatfield Reservoir.

The hydrology of the South platte River is closely related to the uses of
the river and its floodplain area. A review of the tabulation of uses
shows that peak flood flows, reservoir releases, average flows, low flows,
water rights, return flow from lawn irrigation and other non-point dis-
charges, and sewage effluent are all hydrologic factors which affect the
flow of the South Platte River.

TABLE 1
SOUTH PLATI'E RIVER CORRIDOR USES

Flood control and drainage
Domestic water supply
Transportation of irrigation water
Transportation and dilution of sewage effluent
Cultural and recreation
Mineral resource extraction
Water exchanges
Industrial water supply
Wildlife habitat

Flood Control Storage
The South Platte River flood potential is mitigated by Chatfield, Cherry
Creek and Bear Creek flood control reservoirs. The study area is affected
only by Chatfield Reservoir. The location of these reservoirs is shown on
Figure 1. Tributaries enter the mainstem of the South platte River
downstream of these reservoirs which increases the flood potential below

the reservoirs.

Flood control storage available in these reservoirs is

shown in Table 2.