HomeMy WebLinkAbout20083337.tiff MEMORANDUM
TO: Clerk to the Board DATE: December 11, 2008
C.
COLORADO FROM: Josh Holbrook, Public Works
SUBJECT: Consent Agenda Item
Terracon Contract Work Order 7 for Materials Testing on Bridge 13/54A not to exceed $17,085.00.
Two original Contract Work Order 7 Forms are submitted.
Please return one signed original Work Order 7 to Public Works.
pc: Wayne Howard, Senior Engineer
Mona Weidenkeller
Bridge 13/54A file
M\FrancieAAgcndaChairSignaturc.doc
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WORK ORDER FORM
PURSUANT TO AN AGREEMENT BETWEEN
WELD COUNTY
AND
TERRACON
DATED: October 22"d, 2008
Work Order Number: TERRACON - 7
Project Title: Weld County Public Woks Bridge 13/54A Replacement
Commencement Date: December 29th, 2008
Completion Date: May 27th, 2009
Limitations on compensation: Not to exceed $17,085.00
Project Description: Provide materials testing.
Scope of Services: See attached Scope of Work dated September 24th, 2008
Professional agrees to perform the services The attached forms are hereby accepted and
identified above and on the attached forms in incorporated herein, by this reference, and
accordance with the terms and conditions Notice to Proceed is hereby given.
contained herein and in the Professional
Services Agreement between the parties. In the
event of a conflict between or ambiguity in the Weld County/
,o
terms of the Professional Services Agreement
and this work order (including the attached By: —15,72
forms) the Professional Services Agreement Project Manager
shall control. Date: /7 T A.t,�
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Professional By: ' `/" 1OO
Depaituien ead
Terracon Consulting Engineer Date: j V /W_-
J 1242 Bramwood Place Longmont, CO 80501 By:
By: �< 9 Dire or of in ce and Administration
^ e/�` l(� [i v� Date:
Title: 47R/700 F n
C I Y�"c_ By: "LiT, ,
Chairman, Weld County Commissioners
Date: /Ol z 34'0Date:
BOARD OF COUNTY COMMISSIONERS
REVIEW/WORK SESSION REQUEST
RE: Terracon Contract Work Order 7 for Materials Testing on Bridge 13/54A
DEPARTMENT: PUBLIC WORKS DATE: 12/4/2008
PERSON REQUESTING: Josh Holbrook, Construction Inspection Supervisor
Brief description of the problem/issue: Public Works is proceeding with Bridge 13/54A replacement. We
have selected Terracon to perform construction materials testing services under the On-Call Geotechnical
Contract. Terracon has submitted a proposal not to exceed the cost of$17, 085.00. These services are required
to ensure materials used during construction meet contract specifications for embankment, gravel, concrete, and
asphalt. Attached is Work Order No. 7 outlining the Scope of Work and the cost estimated for testing on Bridge
13/54A.
What options exist for the Board? (Include consequences, impacts, costs, etc. of options) BOCC can
either approve or deny Work Order No. 7.
Recommendation to the Board: I recommend approval of Work Order No. 7 for Terracon under On-Call
Geotechnical Contract.
Approve Schedule
Recommendation Work Session Other
William H. Jerke \lr/
Robert Masden v
William F. Garcia &fib
David E. Long V
Douglas Rademacher
Attachments: Work Order Form No. 7, Scope of Work
pc: Mona Weidenkeller, Public Works
M:\—Active Projects\Engineering On-Call Services Geotechnical On-Call\Terracon\WO]-Bridge 13.54A\Work Session Request WO 7.doc
1lerracon
Consulting Engineers&Scientists
Terracon Consultants,Inc
1242 Bramwood Place
Longmont,Colorado 80501
Phone 303 776.3921
Fax 303.776 4041
www terracon corn
September 24, 2008
Mr. Josh Holbrook
Weld County Public Works
1111 H Street, P.O. Box 758
Greeley, CO 80632
RE: Proposal for Construction Materials Testing Services
Weld County Bridge No. 13/64A Over the Big Thompson River
Weld County, Colorado
Terracon Proposal No.C2208102
Referenced Weld County Proposal # B07-00069
Terracon Consultants, Inc. (Terracon) is pleased to submit this proposal for providing
construction materials testing services for the referenced project. This proposal includes an
outline of the project information provided to us, the proposed scope of services, and our
estimated fees.
A. PROJECT INFORMATION
As we understand, this phase of the project will consist of bridge replacement over the Big
Thompson River on Weld County Road 13 and 54k The Bridge will include concrete, class 6
road base with HMA mat and drainage improvements.
B. PROPOSED SCOPE OF SERVICES
Our understanding of the required construction materials testing services for this project is
based upon information provided by your firm. The general services estimated for this
project are listed below, followed by the specific scope of services for each service type:
a Field density-compaction testing of soils;
• Field testing and laboratory evaluation of concrete;
• Field testing of asphalt-concrete.
Delivering Success for Clients and Employees Since 1965
More Than 70 Offices Nationwide
Weld County Bridge 13I54A Terracon
Proposal No.C2208102
September 24,2008
Our services will be provided on an as-requested basis with scheduling by the Contractor or
owner's representative. Since our personnel will not be at the site on a resident basis, it will
be imperative that we be advised when to provide services on the project. Services must be
scheduled a minimum of one (1) working day in advance. Unless other arrangements are
made, scheduling of personnel will be on an as available basis, which may require changes
in personnel assigned to the project. Terracon will not be responsible for scheduling our
services and will not be responsible for tests that are not performed due to a failure to
schedule our services on the project. The detailed scope of services envisioned to complete
the testing is as follows:
Field Density-Compaction Testing: Field density-compaction testing will be performed on
an as-requested basis, during site grading, at the project. Additionally, density-compaction
testing will be performed during backfill, miscellaneous site work and pavement subgrade
preparation. The field services will be supported by appropriate laboratory evaluation of
soils used as fill and/or backfill at the project.
The laboratory testing will include laboratory moisture-density relationships (Proctor).
Laboratory material evaluations will be conducted, at a minimum, for each type of soil
encountered during fill placement. The testing will be performed to determine compliance
with project specifications. The Contractor on the site will be informed of our field
observations and test results. Written reports of test results will be prepared on a regular
basis throughout the duration of the project.
Concrete Testing: An Engineering Technician will be provided, on an as-requested basis,
to sample the plastic concrete used during construction and site work as applicable. The
concrete will be tested for slump, air content and temperature at the time of placement.
Sets of four (4), 4-inch by 8-inch cylinders will be molded at each sampling. All samples will
be field cured at the site and returned to our laboratory for moist curing prior to compressive
strength testing.
Compressive strength testing will be conducted in compliance with project specifications.
All test results will be conveyed after testing is completed.
Asphalt Concrete Paving: Field density-compaction testing by nuclear methods will be
provided by an experienced Technician, on an as-requested basis, during the placement of
asphalt concrete at the project. The density-compaction of the asphalt concrete will be
evaluated utilizing information from the paving contractor's asphalt mix design. (Gradations,
Rice, Marshall — etc). Daily reports of test results will be available on-site for your review
and a written report will be prepared at the completion of the project. CDOT table below will
be followed for frequency of tests under"Frequency-Normal"
2
Weld County Bridge 13/54A Terracon
Proposal No.C2208102
September 24,2008
Element&Test Frequency- Frequency- Frequency- Check Test
Standard Normal Increased* Acceptance Program
Asphalt Content CP- 1 /500 Tons 1/250 Tons 1 /1,000 Tons 1/10,000 Tons
85'
Voids in Mineral
Aggregate CPL-5102, 1/1,000 Tons 1 /500 Tons 1 /1,000 Tons 1 110,000 Tons
5103,5115
Air Voids CPL-5102, 1 /1,000 Tons 1 /500 Tons 1 /1,000 Tons 1/10,000 Tons
5103,5115
Hveem Stability CPL- 1/10,000 Tons 1 /5000 Tons 1/10,000 Tons N/A
5106&5115
Lottman CPL-5109 1 /10,000 Tons 1/5000 Tons According to N/A
Subsection 401.02
Gradation CP 31A&B 1 /10,000 Tons 1/5000 Tons 1 110,000 Tons N/A
Mat Density CP-81 1/500 Tons 1/250 Tons 1 /500 Tons 1/5000 Tons
Joint Density CP-81 1/2,500 Linear feet 1 /2,500 Linear feet 1 15,000 Linear feet 1 /10,000 Linear
Feet
Aggregate Percent 1 /2000 Tons or 1 / 1 /2000 Tons or 1/
1 /500 Tons N/A
Moisture Day Day
Percent Lime CP-60b 1 /Day N/A N/A N/A
C. COMPENSATION
The cost for our services, including all field work, laboratory testing, engineering analyses
and report preparation has been estimated on the basis of unit rates especially prepared for
this project. Our services will be provided to give the owner a greater degree of confidence
in the work being constructed, however, these services in no way relieve the various
contractors from their responsibility for properly constructing the work. For testing and
observation services, our costs for the project are based on the following number of trips at
the durations indicated:
The time required for construction materials testing on the project will be directly related to
the schedule and performance of the various contractors on the site. While the following
phases of construction have been separated for estimating purposes, actual field testing
services may be performed simultaneously on the various phases. As a result, total fees for
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Weld County Bridge 13/54A Terracon
Proposal No.02208102
September 24,2008
construction materials testing services are based on applicable unit rates and we will invoice
you on that basis.
The estimated fees presented will include only those services outlined in the above section
of the proposal. The fees presented are inclusive of all field work, laboratory work, mileage
and report preparation required to complete standard testing requirements.
Following are fees for performing construction materials testing for this project. Additional
services not listed will be billed according to our current fee schedule.
Description Unit Prices Est. Quantity Total
Density Testing $29.00/each 75 $2,175.00
Proctor Curve $119.00/each 3 $357.00
Proctor Curve Modified $129.00/each 1 $129.00
Soil Classifications $73.50/each 4 $294.00
Sieve Analysis $41.00/each 6 $246.00
One Point Check Tests $95.00/each 3 $285.00
R-Value $350.00/each 2 $700.00
Concrete Testing (Set of 4cc) $227.00/each 6 $1,362.00
Asphalt Density $27.00/each 24 $648.00
Asphalt Cores $46.00/hour 8 $368.00
Cores per inch $5.00/each 40" $200.00
Maximum Theoretical Specific Gravity $85.00/point 12 $1,020.00
Oil Content by Extraction/Gradation $185.00/each 4 $740.00
Extraction/Gradation /Voids $325.00/each 6 $1,950.00
Lottman $248.00/each 1 $248.00
Hveem Stability $258.00/each 1 $258.00
Mix Verification $725.00/each 1 $725.00
Project Manager $88.00/hour 10 $880.00
Mileage $.60/mile 2500 $1,500.00
Miscellaneous Testing $3,000.00
Standby Time/Cylinder Pickup $49.50/hour
Total $17,085.00
Our estimated project costs are based upon our understanding of the project, information
provided by the individuals listed above, information from the project plans provided and the
State of Colorado. Additionally, the following assumptions were used in preparing our
estimated fees:
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Weld County Bridge 13/54A Terracon
Proposal No.C2208102
September 24,2008
• All work performed during weekend shifts will be billed at 1.5 times applicable rates;
• Should additional services be required beyond the scope of work outlined above, our
standard unit rates will be applicable;
• The client and/or contractor is responsible for scheduling all testing and inspection
services with a minimum of 24 hours notice;
• Unit rates will be applicable for on-site duration's in excess of those outlined; and
• Invoices for the project will be submitted on a monthly basis.
This proposal may be accepted by executing both originals of the attached Agreement for
Services and returning one executed copy along with this proposal to Terracon. The
remaining executed copy is for your files. This agreement, including the limitations it
contains, shall constitute the exclusive terms, conditions and services to be performed for
this project. Commencement of services by Terracon will be considered acceptance of this
proposal and the attached Agreement for Services.
We appreciate your consideration of Terracon for this work, and look forward to working as
your geotechnical and materials engineering consultant on this and future projects.
Sincer-
T " •C CONSULTANTS INC.
Doug Schneider Edward J. Paas, P. .
CMT Manager Principal
Copies to: Addressee (2)
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