PROJ00382

• Contract/PO #: C153685
• Contractor Name: Monument, Town of
• Contract Type: Loan
• Water District: 10
• County: El Paso
• Bill Number: SB 94-029
• Loan Projects - Doc Type: Feasibility Study

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Chapter I - lntroduction

Monument Lake Dam is presently classifIed as a small Class II embankment dam by the

SEO, and is located in El Paso County and near the Town of Monument. Figure I-I presents a

project location map. The County owns Monument Lake Dam. Ownership will be transferred to

the Town pursuant to House Bill 1365 of2000.

The SEO considers the dam to be in very poor condition due inadequate spillway capacity

and tree growth on the embankment. The reservoir is presently under state restriction, with a

restricted pool of three feet below the spillway crest. On May 6, 1998 the SEO recommended a

zero-storage restriction due to the poor condition of the dam. This recommendation has not yet

been enforced but the SEO could do so at any tiwe.

The purpose of this feasibility study is to select a financially sound alternative to

rehabilitate Monument Lake Dam, which will enllble EI Paso County (County) and the Town of

Monument (Town) to ensure present and future public safety. Based on previous reports and site

inspections the following deficiencies of Monument Lake Dam, must be addressed:

I. Deteriorated outlet works;

2. Absence of outlet energy dissipating structure;

3. Unacceptable tree growth on dam embankment;

4. Inadequate protection from wave ,Iction on upstream face of dam; and

5. Spillway capacity inadequacy.

This report is based on the study prepared for the Town and County by Boyle Engineer

Corporation (Boyle) entitled Monument Lake Dam Study, dated September 1999. The study was

approved by the SEO on January 26,2000. A COPy of the approval letter is presented in

Appendix A. In December 1998, the County, in flssociation with the Town, authorized Boyle to

prepare the feasibility level design study, to address hydrologic and structural issues related to the

dam. As part of the study, Boyle was to perform the following tasks:

1. Background Research and Review. A thorough knowledge of previous studies

was augmented with published information, environmental documents and water

rights issues.

Monument Lake Dam Feasibility Srudy

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