PROJ00480

• Contract/PO #: C150015
• Contractor Name: Highland Ditch Company
• Contract Type: Loan
• Water District: 5
• County: Boulder
• Bill Number: HB 98-1189
• Loan Projects - Doc Type: Feasibility Study

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Report Qn Foothills Reservoir Dam
own cd by

THE HIGHLJ\ND DI~CH COMPANY
Longmont, Cola.

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June 25, 1913.

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The foothills reservoir is 20cated in a ~~~~o~ ~~~~~~~~~,.'
along the footlU.lls about. seven miles .west- of:,LonSmont"... ';rile .~::" ~:-..:~r_
impoundir.g basin is formed by the construction of an earthen
embanlanent having a maximum height of fifty-two feet end a 1 ength
of 3,150 feet with inner and outer slope. tvro and one-half to one
and a free board of six feet. The inner slope ~f the embankment
is entirely covered with rough hand laid rlprap of hard sandstone
averaging about twelve inches in thickness. The outlet from the
reservoir consists of a 36 inch bell joint cast iron pipe laid
in concrete with the usual concrete cutoff Walls, and vertical
balance valve at the upper end of the conduit, and a Ludlow yerticfll
valve at the lower end of the conduit, which control discharge fr~m
the l~e. These vaJ.ves, o:f .cou..r::a-e, .,are opta.t~d lndepend$tJ..Yt '9,~

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one being in use at the same time..

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The upper valve i5 controlled by meMa of a copper cable extending

down the paved face cf the dam. through a ccnnete conduit. The

outlet structures seem to have been well built and are apparently

in good condition.

The spillway from the reservoir is located at the extreme

south end of the dam.end ccnsists cf a channel approximately 200

feet wide, located about 3 feet below the top of the dam. Sinoe

there is very little drainage, amounting to abcut 1,000 acres

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