C150062 Approval Letter

• Contract/PO #: C150062
• Contractor Name: Monument, Town of
• Contract Type: Loan
• Water District: 10
• County: El Paso
• Bill Number: SB 01-157
• Loan Projects - Doc Type: Approval Letter

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financial participation in the project by the County as described in the Financial
Summary of this memo.

. Some selected characteristics of the Town of Monument are presented in Table 1.

Table 1. Town of Monument, Selected Characteristics

Service area population 1,300
Number of taps 574
Monthly residential water service charge $35.00
Median household income $30,294

Proposed Proiect

Monument Lake Dam is an earth embankment structure with the spillway located on the
eastern end of the embankment. The reservoir is presently under a limited storage
restriction by the State Engineer's Office (SEO). The SEO has recommended (but not yet
implemented) a zero storage restriction due to the following deficiencies:

1. Deteriorated outlet works,

2. Unacceptable tree growth on the dam embankment,

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3. Inadequate protection from wave action on the upstream face of the dam, and

4. Inadequate spillway capacity.

A feasibility study for a project to repair these deficiencies was prepared by Boyle
Engineering of Lakewood. The feasibility study analyzed several alternatives for the
repair work and, using the least-cost approach, recommended the program outlined
below.

The project involves rehabilitation of the spillway, the outlet works and the dam
embankment to include the following:

1. Replacement of the existing spillway chute below the spillway crest with a series of
drop structures of concrete and rip rap to safely pass the 100-year flood event,

2. Removal of the top 10 feet of the dam embankment to clear all vegetation, installation
of an internal drainage system in the embankment to manage seepage through the
dam and reconstruction of the dam embankment, and

3. Replacement of the existing outlet works with a new 24-inch steel pipe placed on
bedrock below the embankment.

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