BOARD01969

• Board Meeting Date: 7/23/2002
• Description: CF Section - Changes to Existing Loans - Town of Monument Monument Dam Rehablilitation Project
• Board Meetings - Doc Type: Memo

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Monument Lake Dam is located just west of the Town of Monument on Monument Creek. .
The pre-construction capacity of the lake is 310 acre-feet, with a dam height of 54-ft. and a dam
length of 922- ft, The lake is currently not a water source for the Town of Monument and is used
solely for recreational use and as a wildlife habitat, In 1977 the State Engineer's Office
recommended that a zero restriction be imposed on Monument Lake Dam due to the failed
condition of the spillway discharge chute and the poor condition of the dam, and because of the
large growth of trees and brush that had developed on the embankment.

Boyle Engineering, Lakewood, Colorado completed the feasibility study to repair the
spillway and dam in March of 2001. The estimated project cost to address the spillway, outlet
works, dam embankment and seepage was estimated at $3,081,000,

Below is a brief summary of the major project elements and their estimated cost as
presented in the original cost estimate:

Spillway Rehabilitation = $815,640
Chinmey/B1ankefDrain = $1,077,900
Upstream Gate = $262,080
Dredging 150,000 c,y, = $450,000
Borrow Material = $20,000
Design/Construction Management '" $450,000
F easibilitv Study '" $5.000
Total: '" $3,080,620 .

The project was bid for construction in January of2001, and was awarded to ASI RCC, of
Buena Vista, Colorado, at their bid price of $2,775,060, The Contractor mobilized on-site in
December of2001 and is currently 70% complete with the project.

During construction of the project the Town of Monument has encountered cost overruns.
These additional cost can be summarized as follows; cost overruns due to unforeseen changes
encountered in the field, design changes incorporated into the project at the time of construction,
and additional work that was not included in the original project cost estimate, The specific cost
overruns are summarized as follows:

Change Order No.1 - Sewer Line Relocation:

During excavation of the proposed spillway walls it was discovered that the Palmer Lake
Sanitation District's 12-inch sewer line was located through the wingwall of the existing spillway
and aligned directly behind the proposed east spillway wall, It was determined that leaving the
sanitary line in its current alignment would make construction of the new spillway wall extremely
difficult, given the fact the sanitary sewer line could not be taken out of service,

Additional cost = $46,732

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