PROJ00470

• Contract/PO #: C153477
• Contractor Name: Victor, City of
• Water District: 0
• County: Teller
• Bill Number: XB 99-999
• Loan Projects - Doc Type: Contract Documents

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Alternate Spillway Preliminary Designs--An incremental damage
analysis and determining the proper spillway capacity are con-
current studies, This portion of the study will relate the
required spillway capacity to the physical dimensions and type of
spillways. We would examine as a first choice using an uncon-
trolled natural rock lined spillway, Because of the confined
work area, we may be required to examine the possibility of a
concrete spillway section ~r even using the dam section as an
overflow spillway.

Design of the spillways will be carried only so far as required
to determine the preferred alternate and to provide a basis for
the construction cost estimate.

Embankment Stability Analyses--In this portion of the study, the
static and seismic stability of the existing darn and various
rehabilitation alternatives will be analyzed using limiting
equilbrium methods programmed for in-house computing equipment.
Static analyses will be performed under steady ~~ate and rapid
drawdown conditions. Seismic stability will probably be analyzed
by the psuedo-static method. This method is statisfactory for
dams having soils with a low liquification potential. If the
laboratory testing results and the geologic evaluation (Section
3.3) indicates a moderate to high liquifaction potential for the
embankment materials, then a more detailed slope deformation
analyses will be required. This type of analysis, if required,
will be beyond the scope of the Phase I portion of the project.

Seepage Analyses--At the present time, no seepage is being
readily observed along the downstream face of the dam or either
abutment. Seepage analyses will be performed to evaluate the
rate and direction of water flow from the reservoir. Seepage
through the emhankment and foundation will be modelled based on