FROM: James D. Herberg, General Manager
Originator: Kathy Millea, Director of Engineering
SUBJECT:
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SUNFLOWER PUMP REPLACEMENT AT PLANT NO. 1, PROJECT NO. FE19-04
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GENERAL MANAGER'S RECOMMENDATION
recommendation
RECOMMENDATION: Recommend to the Board of Directors to:
A. Receive and file Bid Tabulation and Recommendation for Sunflower Pump Replacement at Plant No. 1, Project No. FE 19-04;
B. Award a Construction Contract to GSE Construction Company Inc. for Sunflower Pump Replacement at Plant No. 1, Project No. FE19-04, for a total amount not to exceed $2,123,200; and
C. Approve a contingency of $212,320 (10%).
bodyBACKGROUND
The Sunflower Pump Station transfers flows into the Headworks from the deepest of the trunk sewers feeding Plant No. 1. The pump station uses two 40-million gallon per day screw pumps to lift flow from the Sunflower Trunk into Plant No. 1. The screws for those pumps are approximately 32 feet long, have a 9-foot diameter, and are driven through a large gearbox to reduce the speed of the 150-horsepower motor down to 28 revolutions per minute. These pumps are subject to erosion of the screws, corrosion from the sewer gas, and wear and tear on bearings submerged in wastewater.
The pump station is in the same area where the $222 million Headworks Rehabilitation at Plant No. 1, Project No. P1-105, is currently in construction.
RELEVANT STANDARDS
* Comply with California Public Contract Code Section 20103.8, award construction contract to lowest responsive, responsible bidder
* Maintain a proactive asset management program
PROBLEM
Due to age, condition, and recent failures, both Sunflower pumps and pump components at the station are near the end of their useful life. One of two pumps in particular needs immediate replacement, while the other pump can delay replacement for a few more years.
Replacement of the pumps must occur during the dry season because both pumps are needed during high flow ...
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