HomeMy WebLinkAbout4B, CP Rail Payment #3A.IRENHILLS
Request for Council Action
Prepared By: Kristine Giga, Civil Engineer
Council Meeting Date: November 29, 2010
CP Rail Bridge Trail Improvements Change Order #1 and Payment #3 in the amount of
142,074.36
Budgeted Amount:
$310,000- Construction
$30,000- Construction
Engineering
Actual Amount:
$327,587.27- Construction
$40,032- Construction
Engineering
Funding Source:
$327,587.27- State Aid
$40,032 Park Fund
Recommendation:
Motion to approve Change Order #1 and Payment #3 to Blackstone Contractors, of Corcoran, Minnesota, in the
amount of $142,074.36 for the CP Rail Bridge Trail Improvement Project.
Supporting Documents:
Memorandum dated November 29, 2010 from Civil Engineer Kristine Giga
Memorandum dated October 19, 2010 from Bolton Menk, Inc., regarding Change
Order #1
Application for Payment #3 (including Change Order #1)
DATE: November 29, 2010
FROM: Kristine Giga, Civil Engineer
EN HILLS
MEMORANDUM
TO: Honorable Mayor and City Council Members
Patrick Klaers, City Administrator
SUBJECT: CP Rail Bridge Trail Improvement Project- Payment #3
Background
The City of Arden Hills awarded Blackstone Contractors, of Corcoran, Minnesota, the
CP Rail Bridge Trail Improvement Project on July 12, 2010, for a total contract amount
of $312,587.27.
Discussion
This pay request includes work completed through November 19, 2010. The payment is
for $142,074.36; work completed to date includes trail grading and paving, turf
restoration, guard rail installation and retaining wall construction.
This pay request also includes Change Order #1 in the amount of $15,000. Change Order
#1 includes the installation of six additional helical pile anchors. During construction, the
contractor was unable to reach the planned depth of six of the anchors due to unforeseen
obstructions. Testing and analysis was completed to determine what was needed to meet
the capacity requirements of the design. A memo from Bolton Menk is attached, which
details the analysis and additional support needed.
Financial Implications
The construction costs for this project, including Change Order #1, will be paid for using
State Aid Funds. Construction payments and subsequent State Aid reimbursements will
be coded to the Special Revenue- Park Fund.
Council Action Requested
Approve Change Order #1 and Payment #3 to Blackstone Contractors in the amount of
$142,074.36 for the CP Rail Bridge Trail Improvement Project.
City Council Meeting
Metro- inet.us \ardenhills\PR &PW\ Engineering \Council_Actions\2o 10\ 11 -29 -1 OMemo_CPRai1_Payment #3 doc
Page 1 of 1
BOLTON 8i- NA 1 N
Consulting Engineers Surveyors
Date: October 19, 2010
To: Terry Maurer, P.E., Public Works Director
Kristine Giga, P.E., Civil Engineer
Michelle Olson, Parks and Recreation Manager
From: Travis Winter, P.E., LEED® AP
Subject: CP Rail Bridge Trail
City of Arden Hills
Project No.: T16.100325
review and authorization.
12224 Nicollet Avenue Burnsville, MN 55337
Phone (952) 890 -0509 Fax (952) 890-8065
www.bolton- menk.com
MEMORANDUM
During the capacity testing of the helical pile anchors installed as a part of the retaining wall for the CP
Rail Bridge Trail Crossing Project, the contractor discovered that six of the eight anchors in the upper row
did not meet the capacity requirements of the design. These six anchors held approximately half of the
planned working load. To remedy this issue, the contractor submitted a revised design that called for the
installation of an additional six helical pile anchors. The revised design information along with field
installation logs for the original 16 anchors was submitted to Bolton Menk and LHB Corporation for
The field logs from the anchor installations indicate that the upper row of anchors hit obstructions that
prevented them from being installed to the planned depth of 50' The contractors anchor design set the
depth of the anchors based on the soils information that was available. It relied on the anchors advancing
into a layer of stiff clay till in order to develop high enough installation torque values which would
translate into adequate bearing capacity. The obstructions that were encountered could not have been
foreseen based on the soils information that was available.
It is our opinion that the Contractor's original design was adequate, consisting of reasonable anchor
depths and substantial anchor size. This design would have met the requirements if the anchors had been
installed without obstruction.
We concur that installation of the additional anchors is necessary to meet the needed 50 -kip working load.
This loading was computed to restrain the bridge abutment and protect the existing bridge structure. It
was developed using what would be considered a standard factor of safety for public works projects and
is consistent with Mn/DOT design practices.
Due to this change in conditions the Contractor is eligible for additional compensation for the work to
complete the project. We have worked with the contractor and were successful in negotiating a price
reduction from what the work would have cost at the contract price for each of the additional anchors.
F:\ Civil\ ARDH\ T16100325 \Corres \memo_101910.doc
DESIGNING FOR A BETTER TOMORROW
Bolton Menk is an equal opportunity employer
Page 2
After negotiation the price for installing the additional anchors will be $15,000. This price is essentially
the actual cost of labor and materials for the installation with no overhead or profit for the Contractor.
Please contact me to discuss these project developments or to answer any questions you may have as we
move forward with the design process.
F:\ Civil \ARDH\T16100325 \Comes \memo_101910.doc
DESIGNING FOR A BETTER TOMORROW
Bolton Menk is an equal opportunity employer.
CONTRACTOR'S PAY REQUEST
DISTRIBUTION:
CP Rail Bridge Trail Crossing
CITY OF ARDEN HILLS, MN
BMI PROJECT NO. T16.100325
CONTRACTOR (1)
OWNER (1)
ENGINEER (1)
BONDING CO. (1)
TOTAL AMOUNT BID PLUS APPROVED CHANGE ORDERS
$327,587.27
TOTAL, COMPLETED WORK TO DATE
$309,885.61
TOTAL, STORED MATERIALS TO DATE
$0.00
DEDUCTION FOR STORED MATERIALS USED IN WORK COMPLETED
$0.00
TOTAL, COMPLETED WORK STORED MATERIALS
$309,885.61
RETAINED PERCENTAGE 5%
$15,494.28
TOTAL AMOUNT OF OTHER PAYMENTS OR (DEDUCTIONS)
$0.00
NET AMOUNT DUE TO CONTRACTOR TO DATE
$294,391.33
TOTAL AMOUNT PAID ON PREVIOUS ESTIMATES
$152,316.97
PAY CONTRACTOR AS ESTIMATE NO. 3
$142,074.36
Certificate for Partial Payment
hereby certify that, to the best of my knowledge and belief, all items quantities and prices
of work and material shown on this Estimate are correct and that all work has been
performed in full accordance with the terms and conditions of the Contract for this project
between the Owner and the undersigned Contractor, and as amended by any
authorized changes, and that the foregoing is a true and correct statement of the
contract amount for the period covered by this Estimate.
Contractor: Blackstone Contractors
7775 Corcoran Trail East
Corcoran, MN 55340
By
Name Title
Date
CHECKED AND APPROVED AS TO QUANTITIES AND AMOUNT:
ENGINEER: BOLTON MENK, INC., ENGINEERS, 12224 NICOLLET AVE., BURNSVILLE,
By PROJECT
MN 55337.
ENGINEER
Date
APPROVED FOR PAYMENT:
OWNER:
By
Name Title Date
And
Name Title Date
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FEDERAL PROJECT NO.
STATE AID PROJECT NO.
SAP 187 020 -013
LOCAL PROJECT NO.
T16.100325
CONTRACT NO.
CONTRACTOR NAME
Blackstone Contractors, LLC
ADDRESS
7775 Corcoran Trail E.
CITY
Corcoran
STATE
MN
ZIP
55340
LOCATION OF WORK:
C.S.A.H. 76
TOTAL SUPPLEMENTAL AGREEMENT AMOUNT
$15,000.00
STATE AID FOR LOCAL TRANSPORTATION
SUPPLEMENTAL AGREEMENT
City of Arden Hills
June 2008
Supplemental Agreement No. 1
This Contract is between the Local Government Entity and Contractor as follows:
Page 1 of 1
WHEREAS: During installation of the upper row of soil anchors for the referenced
project, the helical anchors encountered a zone of cobbles and /or boulders near the
transition between the soft/firm soil and the stiff clay till. The soil anchors were designed
to terminate in the stiff clay till; however, due to the presence of cobbles and /or
boulders, several of the soil anchors were unable to advance deep enough into the stiff
clay till to develop reasonable installation torque values. Due to the obstructions, some
of the anchors could not be backed out or advanced forward. Those anchors failed to
meet the required working load. This change of conditions requires an additional six
anchors be installed to obtain the needed working load; AND
NOW, THEREFORE, IT IS HEREBY MUTUALLY AGREED AND UNDERSTOOD
THAT: The Contractor has agreed to perform this work for the Negotiated Lump Sum
Price of $15,000.00.
Approved by
Project
Engineer:
Print Name:
Date: Phone:
Approved by
Contractor:
Print Name:
Date: Phone:
Original to Project Engineer; Copy to Contractor
Once contract has been fully executed, forward a copy to DSAE for funding review:
The State of Minnesota is not a participant in this contract; signing by the District State Aid
Engineer is for FUNDING PURPOSES ONLY. Reviewed for compliance with State and Federal
Aid Rules /Policy. Eligibility does not guarantee funds will be available.
This project is eligible for:
District State Aid En. ineer:
Federal Funding
State Aid Funding Local funds
Date: