HomeMy WebLinkAboutContract 39968-A2AMENDMENT No. 2
THE STATE OF TEXAS § CITY SECRETARY CONTRACT NO. 6' 9A' -Aa
(No M&C Needed)
COUNTY OF TARRANT
WHEREAS, the City of Fort Worth (City) and RJN Group Inc., (Consultant) made and
entered into City Secretary Contract No. 39968, (the Contract) which was executed by the City
Manager on the 17th day of March, 2010; and
WHEREAS, the Contract involves professional services for the following project:
Temporary Wastewater Flow Metering for Wholesale Customer Meter Validation
WHEREAS, it has become necessary to execute Amendment No. 2 to said Contract to
include an amended scope of work and revised maximum fee.
NOW THEREFORE, City and Engineer, acting herein by and through their duly
authorized representatives, enter into the following agreement which amends the Contract:
1.
Article I of the Contract is amended to include additional temporary metering of
the Tarrant County Water Supply Corporation sanitary sewer line, as well as validation
metering of the Richland Hills South and North Richland Hills wholesale customer meter
stations.
Article II of the contract is amended to provide for an increase in the maximum
fee to be paid to the Consultant for all work and services performed under the Contract, as
amendedI so that the total fee paid by the city for all work and services shall not exceed
the sum of $25,871.00.
All other provisions of the Contract which are not expressly amended herein shall remain
in full force and effect.
OFFICIAL RECORD
CITY SECRETARY
F C WORTH, TX
EXECUTED on this S) O� day of
2011, in Fort Worth, Tarrant County, Texas.
ATTEST:
Mar Hendrix5
Secretary
APPROVAL RECOMMENDED:
f
S. Frank Crumb, P.E.
Director, Water Department
RJN Group, I11C.
ENGINEER
Name: Hugh M. Kelso
Vice President
O FORM AND LEGALITY:
istant City Attorney
�A
0
VED:
Fernando Costa
Assistant City Manager
OFFICIAL RECORD
CITY SECRETARY
FT. WORTH, TX
www.rin.com
The Choice for C0B= Qri System Solutions
December 283 2010
Mr. Chris Harder, P.E.
Engineering Manager
Fort Worth Water Department
1511 11 th Avenue
Fort Worth, Texas 76102
RE: Amendment No. 2—Wholesale Wastewater Meter Station Validation Testing
Dear Mr. Harder:
RJN Group Inc appreciates the opportunity to provide this scope and amendment cost for the installation
and calibration of three (3) temporary flow meters for a thirty day period. The flow meters will be
installed in the Tarrant County Water Supply Corporation sewer line to validate the accuracy of the
Richland Hills and North Richland Hills flow meters. The scope of services is as follows:
Site evaluation —Based on initial location information provided by the Water Department, RJN will
evaluate and recommend which manhole sites to install the temporary flow meters. The equipment will
be activated to record the depth and velocity at 5-minute intervals.
Installation —Site installation documents will be prepared for each (3) of the selected monitoring
manholes. The document will include the street location, map/sketch, pipe dimensions, manhole depth,
meter configuration and hydraulic conditions. The equipment will undergo a series of diagnostic tests and
calibrations to validate and confirm the meter data.
Data Collection— It is anticipated that each flow. meter will be installed for a period of thirty days.
Weekly site visits will be performed during the monitoring period. A velocity profile will also be
obtained during each calibration by measuring the instantaneous velocity at pre -defined depths, and then
integrated to derive an average for comparison to the meters calculated average velocity.
Letter Report The engineers will use various analytical tools, such as hydrographs and scattergraphs to
verify the accuracy and precision of the equipment. A letter report will be provided including a summary
of the average flows for each site. Attached to the letter will include the site installation documents,
1-hour hydrographs and the average daily flow rates.
Compensation —Compensation for providing these services will be based upon the following rate table.
Description
Units
Total
Site Selection and Installation 3 Sites
3 ea
$ 2,355.00
Meter Maintenance and Calibration 3 Sites
3 ea
$ 53944.00
Data Review/Letter Report
LS
$ 3,290.00
Total
$119589000
the Choice far Coiieeiion Sy wrn Solutions
Mr. Chris Harder, P.E.
December 28, 2010
Page Two
We thank you again for the opportunity and look forward to working with you on this project. Should
you have any questions, please do not hesitate to contact me.
Sincerely,
RJN GROUP, INC.
Hugh M. Kelso
Vice President