HomeMy WebLinkAbout10 Well Pump Maintenance Program Agenda Item # 10
Public Utility District
CONSENT
To: Board of Directors
From: Mark Thomas
Date: February 03, 2010
Subject: Consideration of Award of a Well Pump Maintenance Program
Contract for 2010
1. WHY THIS MATTER IS BEFORE THE BOARD
Board approval is required for expenditures in excess of$15,000.
2. HISTORY
The District does periodic preventive maintenance on all its deep turbine water well
pumps. Staff also looks for ways to improve the efficiency of these wells on an on
going basis. This year staff has identified and scheduled projects on two of its existing
wells.
3. NEW INFORMATION
The Sanders Well is starting to show signs of wear. The shafts and bearings need to
be replaced and the pump rebuilt. The last time this was done was in 1995. In 2003,
the hydraulic grade line of the pressure zone supplied by the Sanders Well was
lowered by 170 feet. As part of the rebuild work, the pump will be modified to lower
the discharge pressure and improve pump efficiency. The production of Sanders Well
will remain the same at 300 gallons per minute.
The Glenshire Drive Well flow requirements have changed in the last year from 1,800
gpm to 1,500 gpm. Staff can reduce the flow by partly closing a valve at the well head,
but this puts additional stress on the station piping and uses additional energy. To
lower the flow correctly, the pump must be pulled and the pump's impellers trimmed.
As part of the work, the pump will be rebuilt.
The District issued a request for bids for the above described work on January 14 and
advertised in the Sierra Sun on January 15, 2010. The bid opening for the Well Pump
Maintenance Program 2010 was held on January 27, 2010 at 2:30PM. One bid
(Attachment A) was received from Carson Pump of Carson City, Nevada for a total
amount of$85,922.00.
4. FISCAL IMPACT
In the FY10 Conservation Budget, $90,100 was set aside in the Public Benefits
Program to fund the Wire to Water improvements. Of the work being done on the two
wells, $41,010 qualifies for the Wire to Water program, as this work will improve
efficiency of the well. The remaining $44,912 will come from the approved FY10
Water Department Budget.
Based on 2009 electric bills for Glenshire Drive Well, and Sanders Well, the energy
cost savings from this project are projected to be $31,400 yearly.
5. RECOMMENDATION
Award the contract for the Well Pump Maintenance Program to Carson Pump in an
amount of $85,922.00 plus a 10% change order authorization for a total amount not to
exceed $94,514.00.
Michael D. Holley
General Manager/Water Utility Manager
ATTACHMENT A
WELL PUMP MAINTENANCE PROGRAM 2010
BID SCHEDULES A& B
UNDERSIGNED, AS BIDDER, HEREBY AGREES AND DECLARES THAT:
SCHEDULE OF PRICES
All applicable sales taxes, State and /or Federal, and any other special taxes, patent rights, or
royalties shall be included in the prices quoted in this bid. It is anticipated that there will be 2
well pumps that will need maintenance in 2010. The Glenshire Drive Well pump will need to
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be removed, 550 feet of 10" pump column and line shaft reinstalled and a Flowserve 8 stage
14" EMM pump rebuilt. The Sanders Well pump will need to be removed and 420 feet of 6"
pump column and lineshaft be reinstalled and pumps rebuilt.
Prices for all items in Bid Schedules must be filled in.
BID SCHEDULE A
Glenshire Drive Well Amount
1A Mobilization $ 4500.00
2A Pull and reinstall 550 feet of 10" pump column, lineshaft
and a Flowserve 8 stage 14" EMM pump. $ ggnn.nn
3A Rebuild and restore to factory specifications, a Flowserve 8
stage 14" EMM pump including replacement of all bearings
and shaft. Machine and install new bronze case wear rings.
Cut diameter of the existing impellers down to reduce output
from 1800 gpm at 730 TDH to 1500 gpm at 730 TDH. Machine
existing impeller wear rings to match new case rings and
re-balance the impellers. $ 8500.00
Total for Glenshire Drive Well (Items 1A thru 3A) $ 22 x900.00
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BID SCHEDULE B
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} Sanders Well Amount
1 B Mobilization $ 9500.00
2B Pull and reinstall 420 feet of 6" pump column and lineshaft.
New Materials to include:
a) 42 — 1-3/16 diameter x 120" long lineshafts, 416 stainless steel
polished and ground
b) 42 — 1-3/16 diameter lineshaft couplings—8 TPI LH carbon steel
' c) 42 —bronze drop in spiders w/rubber bearings
d) 1 —416 stainless steel motor top shaft— 103 1/6"
long x 1 3/16" diameter or as needed to fit new motor. $ 19000.00
TRUCKEE DONNER PUD BID FORMS
WELL PUMP MAINTENANCE PROGRAM 2010 PAGE 00300-3
3B Remove & restore to factory specifications Qty- 1 Byron Jackson
Model 8 MQ Bowl Assembly and decrease output by removal of
4 stages of the existing 24 stage pump. Replace all bearings and
shaft. Machine and install new bronze case wear rings. Machine
impeller wear rings to fit the new case rings. Re-balance impellers. $ 6200.00
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4B Inspect Discharge Head and provide and install new packing
gland and packing. $ 1300.00
513 Video survey the well
(1 hour, color, DVD format) $ 900.00
6B Install District provided 100 hp premium efficiency motor. $ 350.00
7B Well Cleaning
1. Brush 16" casing $ 250 per hr$ 2000 8hrs max
2. Swab 16" casing
(4 hrs before acid and 4 hrs after acid is installed) $ 250 per hr $ 2000 8hrs max
3. Furnish 1400 gallons of muriatic acid w/ inhibitor $ 9800.00
4). Install tremme pipe, mix and inject acid at 30 foot increments $ 2500.00
5. Install well development tool to 612 feet $ 6.00 per ft $ 3672 8hrs max
6. Pump acid to tank and treat to raise pH $ 250 per hr$ 2000 8hrs max
7. Pump and swab 345 feet of screen to redevelop $ 300 per hr$ 2400 8hrs max
8. Bail debris from well $ 250 per hr$ 1 500 6hrs max
9. Video survey of well
(1 hour, color, DVD format) $ 900.00
Total for Sanders Well (Items 7A thru 7B) $ 63022.00
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Note:
All muriatic acid neutralization disposal, disposal of water and debris produced from the well
development is the responsibility of the contractor.
Total for Glenshire Drive Well and Sanders Well (without Cleaning Tasks) $ 59150.00
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Total for Glenshire Drive Well and Sanders Well (with Cleaning Tasks) $ 85922.00
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TRUCKEE DONNER PUD BID FORMS
WELL PUMP MAINTENANCE PROGRAM 2010 PAGE 00300-4