ALP 18

PCC Meeting — October 05, 2010
Version: October 5, 2010
D. Durango Pumping Plant
1. Reclamation is currently in the process of resolving outstanding contractual issues.
However, inflation effects and the net cost of modifying the contract are currently
unknown. The main unit and auxiliary control systems have been installed. Functional
testing of the auxiliary systems has been completed. Challenges in electrical and
mechanical equipment fabrication and installation, partially resulting from the electrical
re- design, are being addressed. These challenges resulted in some of the float, built into
the schedule for first fill, being used.
2. There are currently some issues with the mechanical seal water system, which
occasionally result in nuisance shutdowns of the pumping units. The seal and system
water pump manufacturers have provided input, and the Contractor and Reclamation are
working diligently to resolve this problem. There are other minor issues involving the
sump pumps, the cooling water system, the main pump and motor units, the piping, the
strainers, the fish screen cleaner, and the crest gates. The issues are relatively minor in
some instances, but may require some additional work or redesign efforts prior to
transfer to O &M status. There are some issues with the seals on units #2,-#4 and #8.
The contractor is working diligently to resolve these issues.
3. Additional studies have shown that the Obermeyer Crest Gates will not operate properly
in the conditions in the Intake Structure. The differential required in the water surface
across the gates is not available during normal operating conditions. The use of air as a
medium to operate the Obermeyer Gates will not work. A temporary system utilizing
water as the operating medium has been installed for operations this season. Other
alternative hoisting systems for the gate leafs are being evaluated.
4. The installation of a trash rake system is being evaluated for the intake structure.
5. It appears that the Solids Exclusion Bushings on pumps 5 through 8 were not installed
in the factory. The pump manufacturer is preparing a proposed remedy.
6. No change in risk rating
E. Unknown ground conditions
1. The contractor for the Horizontal Direction Drilling contract has encountered conditions
that they believe are a differing site condition. Work was delayed for one month while
plans were formulated. A trench was excavated through the sands and gravels above
the bedrock to expose the point where the drill hole exits the bedrock. One large
sandstone boulder was encountered. No agreement on if this one boulder represents a
differing site condition. Proposals totaling $1.3 million have been submitted for
claimed impacts due to this issue. Installation of the HDD pipe has been satisfactorily
completed. The potential differing site condition claim has been resolved.
2. The risk rating was revised to indicate an unchanged level of risk.
F. Cultural resources mitigation
1. The final field season has been completed. Some minor field work for clearance of the
boundary fencing remains to be completed. NAGPRA related burials have been
completed and documentation of project findings is ongoing.
2. No change in risk rating
G. Procurement
I. Recent awards have occurred, however high risk remains for construction related work
for other features of A -LP. NNMP, Reaches 2 through 6 procurement has been
completed. Procurement activities for the Project Operating Facility, and Lake
Nighthorse boundary fencing have been completed. A pickup truck has been delivered
for the Association. No other progress on procurement of first fill heavy equipment.
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