HomeMy WebLinkAboutContract 40121-A3 AMENDMENT NO 3
STATE OF TEXAS 8 CITY SECRETARY CONTRACT NO. 4 01a �3
(M&C Not Required)
COUNTY OF TARRANT 8
WHEREAS, the City of Fort Worth (City) and RJN Group, Inc. ,
(Engineer) made and entered into City Secretary Contract No.
40121, (the Contract) which was authorized by the City Council by
M&C C-23914 on the 17th day of November, 2009 and subsequently
revised by two previous amendments; and
WHEREAS, the Contract involves engineering services for the
following project:
Clear Fork Drainage Basin M-210 Sanitary Sewer Improvements.
WHEREAS, it has become necessary to execute Amendment No.3 to
said Contract to include an increased 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 the
additional engineering services specified in a proposal letter
dated September 15, 2011, a copy of which is attached hereto and
incorporated herein. The cost to City for the additional design
services to be performed by Engineer total $23,388.50.
2.
Article II of the Contract is amended to provide for an
increase in the maximum fee to be paid to Engineer for all work
and services performed under the Contract, as amended, so that the
total fee paid by the City for all work and services shall not
exceed the sum of $569,393.50 .
OFFICIAL RECORD
CITY SECRETARY
I:T.WORTH,TX !,
10-14- 11 A11 : 27 IN
3.
All other provisions of the Contract which are not expressly amended
herein shall remain in full force and effect.
EXECUTED on this the Jgk4,4 day of 20111 in Fort Worth,
Tarrant County, Texas.
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oMarty Hendrix, ity Secretary O�$
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APPROVED: NO M&C REQUIRED APP
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`S. 'Frank Crumb, P.E. Fernando Costa
Director, Water Department Assistant City Manager
RJN GROUP, INC.
ENGINEER
By: M
Name:Hugh 4. Kelso, Principal
12160 Abrams Road
Suite 400
Dallas, TX 75243
APPROVED AS TO FORM AND LEGALITY:
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Assistant City Attorney
OFFICIAL RECORD
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CITY SECRETARY
FT. WORTH, TX
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Excellence through Ownership
September 15, 2011
ATTN: Mr. David Cooper, P.E.
Fort Worth Water Department
City of Fort Worth
1000 Throckmorton Street
Fort Worth,Texas 76102
RE: Contract Amendment No.3
Clear Fork Drainage Basin— M-210 Sanitary Sewer Improvements
City Project No. 010222, City Secretary No. 40121
RJN Group File No. 18242500
Mr. Cooper:
Please find attached, Contract Amendment No. 3 to the M-210 Sanitary Sewer Relocation
Project. This third amendment request specifically addresses the City of Fort Worth Water
Department request to conduct emergency geotechnical bores to assist the tunneling contractor
with the construction of the M-210 Trinity River Siphon under Part 1 of the project. These
additional bores are needed to document the exact depths of the limestone bedrock that will be
tunneled since our original bore pit for the river crossing was shifted more than 50 feet to south to
avoid any potential damage to a large pecan tree in the City Park at the request of the City.
During the initial excavation of the bore pit, the depth of the bedrock was determined to be deeper
than expected based on the original bore location along the river bank. These supplemental bores
will determine if the siphon depth will need to be lowered to insure that the tunnel will be
constructed completely in bedrock under the river.
Additionally, we have added two additional bore locations in this amendment request along the
west side of the City Park adjacent to the existing 54-inch storm sewer alignment. These bores
will be collected now since the City has previously requested RJN to design a lowered storm
sewer outfall into the Trinity River to avoid an elevation conflict between the existing 54-inch
storm sewer and the new M-210 Sewer Interceptor. The actual design and permitting of the
proposed storm sewer will be addressed under another contract amendment to be issued.
RJN Group, Inc retained Gorrondona & Associates, Inc. (GAI) to provide supplemental
geotechnical consulting services in support of the City of Fort Worth's Sewer Main M-210 Sewer
Improvements—Part I Project to address the emergency soil boring collection needed to facilitate
the Trinity River siphon tunnel construction. GAI is a certified M/WBE firm that is qualified to
provide these services in addition to the topographic surveying services that they have already
provided to RJN for this project. The addition of GAI for geotechnical services was required
after learning from the City's M/WBE office in April 2011 that Addula Consulting Engineers,
Inc., our original SUBCONSULTANT for geotechnical services, had lost his minority
certification status in Fort Worth and no additional work will be allowed to be assigned to him
under this project.
6701 - ••• Stair Road,Suite I 11 W-Fort Wortli, • • 11 16
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www.rjn.com
Excellence through Ownership
Gorrondona& Associates, Inc. will perform the following services:
1. Drill five (5) three inch diameter soil bores at various locations identified in Forest Park.
These soil bores will be drilled from depths of 35-ft to 55-ft and bore logs prepared.
2. The bore locations will be surveyed to sub-centimeter accuracy for inclusion in design
plans. The soil samples will be collected and sent to a laboratory for standard materials
testing.
3. GAI will evaluate the sampled geotechnical data to denote soil and groundwater
conditions encountered at each bore location, make recommendations for structural
designs and provide earthwork recommendations regarding compaction and other
construction considerations based on the soils identified and groundwater conditions at
the borings.
4. GAI will provide copies of the drillers log to RJN to allow for the evaluation of the depth
of limestone bedrock along the proposed sewer siphon alignment for 3 bore locations in
order to facilitate the tunneling work associated with the river crossing. A formal
geotechnical report for all bore locations will be produced and submitted.
The field work and engineering services associated with the effort are anticipated to take up to 2
weeks to complete; however, the preliminary drilling logs are anticipated to be received within 24
hours of completing the 3 new soil bores located along the eastern edge of the City Park parallel
to the proposed sewer main. GAI's labor and expenses for the services noted above will be billed
both on a time and material and unit price basis not to exceed, $10,560.00, without prior written
approval.
Since the City directed RJN to immediately address this bedrock issue, RJN staff has been
actively engaged in the planning and coordination of these services. As such, in addition to the
10% subcontractor mark-up for general administrative costs associated with subcontracting, RJN
has incurred other labor and expenses associated with this matter, including costs for the
selection, negotiation, preparation of a subcontracting agreement, and coordination with GAI,
plus the production of a bore log exhibit to show the depth of the bedrock at the proposed River
crossing. Engineering services also included the hydraulic analyses of modifying the siphon
design as directed by City Staff to deepen the river crossing by 5 feet at the request of the
Contractor. Several design alternatives were evaluated.
Additionally, RJN is seeking under this amendment the anticipated labor and expenses associated
with the revisions to existing NI-210 Sewer Improvements Part 1 plan sheets as necessary to
address the impacts of the deepening of the sewer siphon crossing by 5 feet as requested by the
Contractor and approved by the City. This includes efforts to submit revised plan sheets to the
I'arrant Regional Water District (TRWD) and the U.S. Army Corps of Engineers (USACE) as a
permit revision and to re-issue plan sheets and copies to the City and Contractor(s) as directed.
6701 Brentwood Stair Road,Suite I OOW-Fort Worth,TX 76112-3363-817.451.3500-fax 817.451.3506
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Excellence through Ownership
Therefore, RJN is seeking funds to recover all of the costs associated with the identified
engineering services described above as well as funding for GAI's contract administration in the
amount of a ten(10%) percent subcontracting mark-up.
Contract Amendment No.3 costs are as shown in the table below:
Amendment Item Description Quantities Unit Prices Total Cost
(Avg•)
1. Geotechnical Services by GAI for 5 soil bore locations $ 10,560 00
2. RJN Subcontractor 10% mark-up: $ 1,056 00
3. RJN costs associated with new Geotechnical Services conducted and $ 5,257.50
Alternative Siphon Design Hydraulic Analyses:
Labor costs: PD 2.5 Hrs $205 1hr $ 512.50
PM 15 Hrs $ 1 751h $ 2,625.00
PE 15 Hrs $ 105 1hr $ 1,575.00
CT 5 Hrs $ 95 1hr $ 475.00
Subtotal RJN Labor Hrs/Expenses/Total Costs: 37.5 Hrs $ 70.00 $ 5257.50
4. RJN costs associated with Siphon Design Plans Revisions to
accommodate a deepened siphon crossing authorized by the City, $6,515.00
including submissions to the City,TRWD and USACE (permit):
Labor costs: PD 1 Hrs $205 1hr $ 205.00
PM 16 Hrs $175/hr $ 2,800.00
PE 12 Hrs $ 105 1hr $ 1,260.00
CT 20 Hrs $ 95 1hr $ 1,900.00
Subtotal RJN Labor Hrs/Expenses/Total Costs: 49 Hrs $ 350.00 $ 6,515.00
Total Amendment No.3 Fee Request: $23,388.50
Therefore, a summary breakdown of Amendment No. 3 compensation is as follows:
Labor Expenses TOTAL
RJN Group, Inc.: $12,408.50 $420.00 $12,828.50
GAI. (Certified M/WBE): $10 560 00
Amendment No.3 Total: $23,388.50
The $10,560.00 in M/WBE services represents approximately a forty-five percent (45.15%)
participation level in the project associated with Amendment No. 3. Overall, Amendment No. 3
represents over a 4 percent(4.1 1%) increase in the total contract value to date.
For your convenience, a summary of the total project fees are as follows:
6701 - ••• Stair Road,Suite 1 11 W-Fort Worth, 76112-M 11 16
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Excettence through Ownership
Contract Item Fee
Original Contract Amount $ 432,396.00
Amendment No. 1 Si 92,009.00
Amendment No. 2 Si 21,600.00
Amendment No. 3 Si 23,388.50
Amended Contract Value $ 569,393.50
Please do not hesitate to contact us should you have questions or need any background
information concerning this matter. Thank you for your time and consideration.
Sincerely,
(xZz4W'_'�-
Chris Brooks, P.E.,
Senior Project Manager
ATTACHMENTS
CC: Tony Sholola, P.E., FWWD, City of Fort Worth
Hugh Kelso, Regional Manager-Vice President, RJN Group
Peter Lai, Vice President, RJN Group