FLOOD00689

• Designation Number: 136
• County: Arapahoe
• Community: Littleton
• Stream Name: Slaughterhouse Gulch
• Title: Major Drainageway Planning - Slaughterhouse Gulch, Littleton
• Date: 5/1/1974
• Designation Date: 5/1/1979
• Floodplain - Doc Type: Floodplain Report/Masterplan

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Drawing No. SG-4

This reach of the channel, extending along Berry Drive
from Elmwood Street to Berry Avenue, is also susceptible
to high flood damages. Through this reach, as in the
previous drawing, the natural major channel has been
totally obliterated and essentially made a part of the
transportation system of the area. The design of the
street system however did not consider drainage needs.
This has resulted in extensive property improvements ad-
joining the street which now have become part of the
flood plain for Slaughterhouse Gulch. This is an error
in development which was made at the time of the origi-
nal planning for the area.

The proposed plan for the area is to adopt the flood control
program mentioned above and which will be explained in
greater detail later including flood plain zoning this
reach and qualifying adjoining property owners, affected
by the IOO-year flood event, for the subsidized flood
insurance. It would seem inappropriate at this time to
expend additional funds, resulting in possible major changes
to the area, on a major planning error which did not con-
sider drainage and flood control in the proper perspective.

Through this reach, approximately eight residences would be
affected by the 100-year flood, either through the flood
plain totally encompassing the improvements on the property
or the house having been set too low so that lower level
improvements are on nearly the same level as the street.
The latter situation is the case in approximately four in-
stances.

The existing 36 inch reinforced concrete pipe through this
reach adequately serves the area for the high frequency or
minor runoff events. It can be expected that larger flows
will continue to run through the gutters of Berry Drive on a
regular basis and continue to cause minor damages where high
velocities jump the gutter and reach into adjoining improved
yards.

Drawing No. SG-S

Through this reach, from Berry Avenue to Powers Park, the
IOO-year flood plain has been outlined. The existing facili-
ties are shown on the map and consist of the 36 inch rein-
forced concrete pipe to Huron Street, the two 48 inch corru-
gated metal pipes under Huron Street and the 36 inch corru-
gated metal pipe recently installed as the outlet from Powers
Park Detention Pond. As indicated earlier, the park will
detain flood hydrographs for the high frequency 2 to 3 year
flood event and is designed to pass the 100-year flood event
over the top of the spillway, as shown on the map.

VIII-7