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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These facilities include three 30 inch corrugated metal
pipes extending from a junction box on the east side of
Windermere Street, and a 42 inch reinforced concrete
pipe which extends from the junction box to Elmwood Street.

The 100-year flood plain has been delineated on the map
to show the limits of flooding under present conditions.
The flood plain as outlined affects approximately 15
residences through the reach from Elmwood to Windermere
Street. The greatest damage can be expected to occur
between Windermere Street and Datura Street where no
provision exists for surface conveyance of flood flows.

Under the proposed plan, the immediate action suggested for
this area is to adopt a flood control program publicly
identifying flood hazards, implementing the necessary flood
plain management controls through zoning ordinances and
qualifying all affected property owners for flood insurance.

It is not suggested that hard and fast structural improvements
be made to this reach at this time. With the inherent right-
of-way problems characteristic of this two block reach, any
type of improvement through here will be expensive and diffi-
cult. If structural improvements were implemented, surface
conveyance ability should be provided in conjunction with the
subsurface improvements to provide capacity in excess of the
major flood used in planning. By the implementation of
structural improvements, flooding damage could still be
expected for storm runoff exceeding that of the design
capacity of the structural improvement.

This plan recommends that the City initiate a program which
would, through a period of time, acquire the lots and prop-
erty identified on the map. All the lots identified are
susceptible to different depths of flooding and various
degrees of flood hazards. By implementing a program of
right-of-way acquisition through this area, which should
not be forced upon property owners, but be implemented in
such a way as to make them aware of the hazards of the
area, a more equitable means of acquiring the hazardous
property, to the satisfaction of both the City and the
property owners and occupants, will result. At the time that
the complete corridor is under the ownership of the City,
necessary surface improvements could be made through the
reach to convey the 100-year flood through the limits of
the city property and remove the flood plain limits from
the adjoining properties. At the same time, the majority
of the present potential damage sources would have been
eliminated and the average annual flood damage reduced
while the flood conveyance ability of the reach would
exceed that for runoff events in excess of the 100-year
flood magnitude.

During the interim, through which the right-of-way is to
be acquired, additional programs should be adopted by the
City which will be discussed in more detail in the next
section.

VI II - 6