Chaucer-CS 950929 September 29, 1995
10555 Jie;,lkirk Street
$ u i I e 530
Dallas, Texas 75220
21 4.831.1 1 1 !
FAX 214.831.0800
The City of Coppell
255 Parkway Blvd.
P. O. Box 478
Coppell, Texas 75019
Attn: Kenneth M. Griffin, P.E.
Assistant City Manager
City Engineer
Re: PROPOSAL FOR GEOTECHNICAL CONSULTING SERVICES
Pond Siltation Study
Heartz Road and Park Valley Drive
Coppell, Texas
PBT Proposal No. 95-120
Dear Ken:
Patton, Burke & Thompson (PBT) is pleased to submit this written proposal, in accordance with our
September 28, 1995 conversation with you, for performing certain geotechnical consulting services for the
referenced pond.
GENERAL
It is our understanding based on our discussion, a site visit and review of certain limited data provided by
you to date, that the subject pond is privately owned by the Chaucer Estates homeowner's, is approximately 1 to
l-l/2 acres in plan, was constructed in the last 3 or 4-years with a normal pool elevation of 460.0-feet and
reportedly had an original bottom elevation of 450.0-feet. Apparently the pond has shown signs of heavy siltation,
which is believed to be as much as 4-feet by the Homeowners. The primary purpose of this assigment is to provide
geotechnical subsurface information to assist the City in quantifying the extent and nature of the siltation.
SCOPE OF WORK
Our proposed scope of work, again based upon discussion with you and our previous experience with
similar assignmems, would involve a geotechnical engineering investigation program. The following describes the
general scope of work we propose at this time for carrying out the necessary, in our opinion, services:
Pa,*on, Burke & Thompson
Engineering Consultants
city of Copp¢II
Page 2
1. Field investigation
· Two (2) or three 0) shalloW sampling probes taken in the pond area which penetrate the bottom
silt layer and a foot or so into the original pond bottom. These probes, estimated to penetrate
5 to 6-feet of total soil, will be taken from a 12 to 14-foot work boat and samples obtained by
either pushing or driving a soil sampler.
2. Laboratory Testing
· Moisture content, unit weight (if possible), Atterberg limits and grain-size analysis on selected
siltation soils to determine classification and consistency properties.
· Other laboratory tests as deemed appropriate upon evaluating findings of probes.
3. Engineering Analyses/Written Report
· Pond bottom soil stratigraphy and associated variability.
· Evaluation of physical and consistency characteristics of bottom soils.
· Discussion of findings and conclusions in regard to thickness and geotechnical properties of
siltation.
4. Assumptions Regarding Site and Field Work
· The probes will be located in the field by PBT based upon rough measurements from existing
features.
· Selected probe locations are flee of underground obstructions, and underground utilities, if any,
will be located by others.
· Field standby time (outside PBT's control) will not exceed 1-hour.
· The assignment assumes that only non-contaminated/non-hazardous soils and subsurface
conditions will be encountered during the field exploration program. Otherwise, the proposed
cost for the field and laboratory investigations will need to be revised.
PRICING/CONTRACTING
PBT proposes to perform the work for this investigation on a time and materials basis, for the scope of
work outlined above, for a maximum not to exceed budget of $2,085. Furthermore, we propose to provide all
services in accordance with PBT's General Terms & Conditions (Form 1-95A), and any additions or modifications
to the above referenced scope of work, with prior approval by you, will be in accordance with PBT's Schedule of
Charges (Form 9-95/B)
Pa*ton, B~zrke & Thompson
Engineeri, g ¢orfsulrafrs
City of Coppell
Page 3
SCHEDULING OF WORK
PBT will develop a schedule for the field investigation program immediately upon your authorization
(tentatively scheduled for Wednesday, October 4th in an effort to have results to you for your planned meeting on
October 7, 1995). The field program, barring any access problems or severe weather, can be completed in less
than one (1) working day after mobilization to the site and the laboratory testing program, for selected soil samples
retained from the probes, will be completed within two (2) or three (3) working days after field program
completion.
Following the collection of all field investigation and laboratory testing data, preliminary verbal findings can
be presented, if desired, within one (1) to two (2) working days. The final written report will be submitted within
five (5) working days after the preliminary verbal findings.
PBT is pleased to have the opportunity to submit this geotechnical investigation services proposal to you
and we look forward to being of professional service. If you have any question in regard to the content of this
proposal, or if additional input is desired, please feel free to contact the undersigned.
To authorize this work, please sign and return one copy &this agreement to us.
Very truly yours,
Enc: Assignment Authorization
General Terms and Conditions
Schedule of Charges
JWB:jp
95-120.pro
Patton, Burke & Thompson
Engineering Consultants
City of Coppell
Page 4
ASSIGNMENT AUTHORIZATION
The City of Coppell hereby agrees to the terms of this proposal and the attached General Terms and
Conditions (Form 1-95/A), and the attached Schedule of Charges (Form 9-95/B).
Proposal accepted by:
The City of Coppell*
Title Date
*Individual with financial authority to commit to this Assignment Authorization.
Pn~*on, Burke & Thompson
Engineering ¢onsuitonts
Patton, Burke & Thompson
General Terms and Conditions
1.0 General
Patton, Burke & Thompson (PBT) by the performance of services covered hereunder, does not in any wa3' assume any of
those duties or responsibilities ~dth regard to the project's design professionals or any other design agencies or authorities.
Client agrees to furnish or cause to be furnished to PBT, all documents and information knovm to client that relate to the
identity, location, quantity, nature or characteristics of any hazardous or toxic materials on or near the site. In the event that
test samples obtained during PBT's work contain substances hazardous to health, safety, or the environment, these samples
remain in the property of the client.
2.0 Billing
PBT will submit progress invoices to client monthly and a final invoice upon completion of services. Each invoice, on
presentation, is due and payable by client or his authorized representative. Payment is past due 30 days from invoice date.
Client agrees to pay interest of one and one-half percent (1-1/2%) per month, (but not exceeding the maximum rate
allowable by law), on past due accounts. Any attorn%,'s fees or other costs incurred in collecting any delinquent amount
shall be paid by client.
3.0 Standard of Care
PBT services will be performed, vAthin the limits prescribed by its clients, with the usual thoroughness and competence of
the engineering consulting profession, and in accordance with the standard for professional services at the time and under
similar conditions those services are rendered. No other warranty or representation, either expressed or implied, is included
or intended in PBT's proposals, contracts, or reports.
4.0 Liability
PBT's liability shall be limited to injury or loss caused by the negligence of PBT, its subcontractors, and/or agents
hereunder. PBT has neither created nor contributed to the creation or existence of any hazardous, toxic, pollutant, or
otherv;ise dangerous substance or condition at the site, and its compensation hereunder is in no way commensurate with
the potential risk of injury or loss that ma>, be caused by exposure to such substances or conditions.
PBT's liability for injury or loss arising from (1) professional errors or omissions and/or (2) any hazardous, toxic, pollutant,
or waste gases, liquids, or solid materials shall not exceed $5,000 or our fee, whichever is greater.
PBT's liability for injury or loss ahsing bom comprehensive general and automobile exposures shall not exceed $100,000.
The client agrees to defend, indemnify, and hold PBT ham'dess bom any claim, liability, or defense cost in excess of the
limits stated herein for inju-D.' or loss sustained by any party from exposures allegedly caused by PBT's performance of
services hereunder.
In the event the client makes a claim against PBT, at law or otherwise, for any alleged error, omission or other act arising
out of the performance of its professional seaMces, and to the extent the client fails to prove such claim, then the client shall
pay all costs, including attorney's fees, incurred by PBT in defending itself against the claim.
5.0 Applicable Law
All general terms and conditions shall be governed by the laws of the State of Texas.
I:on~n( 1-9 5: A )
PATTON, BURKE & THOMPSON
SCHEDULE OF CHARGES
The compensation to Patton, Burke & Thompson (PBT) for professional services is based upon and
measured by the following charge elements.
1.0 Personnel Charges
Charges for PBT employees and consultants are based upon hourly rates for the following general labor
categories:
A. GEOTECHNICAL ENGINEERING SERVICES
Principal ................................................. $ 95/hr
Senior Engineer ............................................. 75/hr
Project Engineer ............................................. 55/hr
Geologist ................................................... 50/hr
Staff Engineer ............................................... 45/hr
Word Processor/Secretary ..................................... 30/hr
B. CONSTRUCTION MATERIALS ENGINEERING & TESTING SERVICES
Project Manager ........................................... $ 85/hr
Sr. Project Engineer .......................................... 70/hr
Project Engineer ............................................. 55/hr
Field Engineer ............................................... 40/hr
CWI/Structural Steel Inspector ................................. 40/hr
Field Technician ............................................. 31/hr
Word Processing/Drafting ..................................... 30/hr
[Note: Time spent in either local or inter-city travel, when travel is in the interest of the work, will be
charged for in accordance with the foregoing schedule; however, for non-local travel by pubic carrier a
maximum of eight hours per day will be charged.]
2.0 Equipment Charges
PBT equipment, if used, will be billed at the rates noted in the proposal.
3.0 Other Services and Supply Charges
Charges for services, equipment and facilities not furnished directly by PBT, and any unusual items of
expense not customarily incurred in PBT's normal operations, are computed as follows:
Cost plus 10 percent includes shipping charges, subsistence, transportation, outside printing and
reproduction, long distance communication, special supplies and rentals.
Cost plus 15 percent includes surveying services, land drilling equipment, construction equipment
and testing laboratories.
Cost plus 20 percent includes aircraft, watercraft, and marine drilling equipment.
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