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<br />The existing 2,300 foot, 32-inch diameter metal siphon was constructed between 1955 and 1957,
<br />with a design life of 30-years. The current siphon is now 50-years old and is showing signs of severe .
<br />deterioration. The steel has oxidized to a point where the pipe walls have thinned in many places beyond
<br />repair, Also, significant quantities of iron oxide scalings have accumulated at the siphon outlet. With
<br />evidence of further degeneration, the siphon is now subject to imminent failure, which would render the
<br />ditch inoperable.
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<br />In the fall of 2003 the Company completed a feasibility study, in accordance with the Colorado
<br />Water Conservation Board guidelines, to replace the existing 32-inch steel pipe with a new 30-inch PVC
<br />pipe. Replacement of the pipe involved trench excavation and backfill, pipe purchase and placement, and
<br />the construction of new concrete inlet and outlet structures.
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<br />Table 1 below is a brief summary of the major project elements and their estimated cost as
<br />presented in the original feasibility study:
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<br />Table 1. Project Cost Summary
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<br />Item Estimated Cost
<br />1. PVC Pipe (2,300 l.f., 30-inch, 80#) $66,700
<br />2. Installation $23,000
<br />3. Excavation & Dewatering $18,044
<br />4. Concrete Structures $30,000
<br />5. Bedding Material & Dewatering $35,160
<br />6. Contingency $44,096
<br />Subtotal: $217,000
<br />8. Engineering $50,000
<br />Total: $267,000
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<br />Since the Board's approval of these improvements in May of2003, the Company has gone
<br />through a formal bid process to construct the project. The Company is currently reviewing the bid of
<br />Gosney and Sons, Inc., Bayfield, Colorado in the amount of$180,610, for future award and
<br />construction. The Company purchased the 30-inch siphon pipe in May of2003, at a cost of$65,955.
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<br />DISCUSSIONS
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<br />Table 2 below is a comparison of the current project costs, versus the costs presented in the original
<br />feasibility study:
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<br />Table 2 - Cost Comparison
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<br />Item Oril!inal Cost Estimate Actual Proiect Cost Cost Difference
<br />1. PVC Pipe, 2300 l.f. $66,700 $65,955 ($745)
<br />2. Excavation, Installation, $150,300 $180,610 $30,310
<br />Concrete Structures, and
<br />Bedding Material
<br />3. Design Engineering $50,000 $50,000 $0
<br />4. InspectionlTesting $0 $10,000 10,000
<br />Totals: $267,000 $306,565 $39,565
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<br />Flood Protection. Water Project Planning and Financing. Stream and Lake Protection
<br />Water Supply Protection. Conservation Planning
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