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Below is a brief suminary of the major project elements and their estimated cost as presented in the original cost estimate: Mobilization Excavate Access Bench Excavate Chimney Drain Supply/Place Chimney Gravel Backfill Bench SupplylInstall Chimney Outfall Excavate Toe Drain Supply/Place Perforated Toe Drain 5upplylPlace Toe Drain Gravel Sub-total: 5% Contingency Construction Total: _ $5,000 _ $7,500 _ $7,000 _ $41,400 _ $7,500 _ $5,000 _ $1,300 _ $6,000 _ �7,000 _ $87,700 _ $4,385 _ $92,085 Engineering Quality Assurance = $7,915 Frevious Piezometer Installation = $8,920 Previous Eng. and Soils Work = $13,342 Feasibility Study = $9.720 Total Project Cost = $131,962 The dam rehabilitation work was bid for construction in the summer of 2002, and was awarded to Zak Dirt, I,ongmont, Colorado in September of 2002, at their bid price of $93,700. The Contractor mobilized on-site in September of 2002 and completed the work in October of 2002. During construction of the project the Cedaz Mesa Ditch and Reservoir Company encountered cost overruns, due to design modifications, construction access difficuities, and additional work added during the time of construction. Theses addirional costs aze summarized as follows: Professiona[ EngineerinQ Services: Pr�* t^ Lhe dev .°.�CY:::C�t Cf fii .a: design gls:.� f:,, t�he p�ject, the �edar hiesa i�itcn and Reservoir Company hired the services of Smith Geotechnical, Fort Collins, Colorado to perform preliminary engineering and soils investigation to rehabilitate the dam. This preliminary work was conducted a number of years ago, with a significant portion of the prior soils work deemed unusable by the State Engineer's Office. The State Engineer's concem on the soils investigation was the time frame that had transpued from the point of collection to the time that the material testing actually took place. Therefore, given the status of the preliminary engineering work, the Cedar Mesa Ditch and Reservoir Company hired the services of Knight Peisold, Denver, Colorado to utilized the information available and to prepaze final design plans to rehabilitate ihe existing reservoir to the guidelines of the State Engineer's Office. Added Cost: $28, D00 . . • The final design submitted to the State Engineer's Office for review included the placement of a vertical chimney drain in the existing dam embanlmient. Based on the recommendation from the State Engineer's Office during their review process this design alternative was changed to include a buttress fili, 15-feet wide at a maximum height of 20-feet, placed at the downstream toe of