HomeMy WebLinkAbout07/17/2012 2012 Retention Basin Dredging Project- Kensington Business Park - Basin #4Mount • • ' Public Works ' •
INTEROFFICE MEMORANDUM
TO: VILLAGE MANAGER MICHAEL E. JANONIS
FROM: ENGINEERING ASSISTANT
DATE: JULY 10, 2012
SUBJECT: 2012 RETENTION BASIN DREDGING PROJECT
KENSINGTON BUSINESS PARK — BASIN #4
CONTRACT AWARD - $120,257
Background
The Village of Mount Prospect is responsible for maintaining the 11 retention basins in the Kensington
Business Center. Per the agreement made with the business park in the 1980s, Village maintenance
includes sediment dredging, slope erosion protection, and outlet structure upkeep. Staff has identified
Basin #4 on Business Center Drive (map attached) to be this year's dredging project.
The project will involve pumping water out of the basin into the adjacent Feehanville Ditch, loading
accumulated sediment, and hauling it to an offsite landfill. The bottom and sides of the basin will then be
reshaped to conform to the original design. At project's end the shoreline will be stabilized with stone,
silt basins will be constructed near inflow structures, and the site will be restored with sod. Subsequent
rainfall will naturally refill the retention basin.
Bids Results
A Notice to Bidders was published in the local newspaper and several local contractors were sent
invitations to bid on the project. At 1:30 p.m. on July 9, 2012, sealed bids were publicly opened and read
aloud.
Three (3) contractors submitted bids for this project. The bids ranged from a low of $109,325 by
Copenhaver Construction, Inc. to a high of $149,835 by Earth Werks Corp. The Engineer's Estimate is
$140,110
All bidders submitted a bid deposit in the amount of 5% of their total bids as required by the contract
documents. All bids were checked for their accuracy. No errors were found. All bidders correctly signed
their bids and bid bonds. Below is a summary of the bids.
Bidders Total Bid
Copenhaver Construction, Inc. (Gilberts, IL) $109,325
Martam Construction, Inc. (Elgin, IL) $115,925
Earth Werks Corp. (Batavia, IL) $149,835
Engineer's Estimate $140,110
Page 2 of 3
2012 Retention Basin Dredging Project
July 10, 2012
Discussion
The low bidder, Copenhaver Construction, Inc., completed similar projects for the Village including
Retention Basin #7 in 2008 and Retention Basin #5a in 2011. Along with those successful projects, the
Village of Highland Park, Wheeling Township, Glenview and South Barrington Park Districts all
indicated Copenhaver has done quality work in their communities in recent years. Copenhaver meets the
requirements of the contract documents and their references show their workmanship to be good.
Since the contractor's bid is based on estimated quantities, I recommend a 10% contingency of $10,932
be added to the proposed contract to account for variable sediment thickness and possible increases in the
amount of sediment removed. The revised total contract award would be $120,257.
Recommendation
I recommend that the low bidder, Copenhaver Construction, Inc. of Gilbert's, IL, be awarded the
construction contract for the 2012 Retention Basin Dredging Project in the amount not to exceed
$120,257. There are sufficient funds in the 2012 Budget to cover this proposed contract.
Please include this item on the July 17` Village Board Meeting Agenda.
Dan Randolph, P.E.
I concur with the above
Director of ubliWorks Sean P. Dorsey
Attachments: Project Location Map
c: Village Clerk Lisa Angell
H : \Engineering\Ponds\kbc_basin_4 \Construction \construction rec memo.doc
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