HomeMy WebLinkAboutContract 39307STATE OF TEXAS §
COUNTY OF TARRANT §
®NCCRENO lal
KNOWN ALL BY THESE PRESENTS:
THIS AGREEMENT, entered into theay of V41 2009 by and
between the City of Fort Worth, a home -rule municipal corpor ion situated in Tarrant,
Denton, Parker, and Wise Counties, Texas, acting hereui by and through Fernando Costa
its duly authorized Assistant City Manager, hereinafter called the "City", and Freese and
Nichols, hie., an independent contractor "Consultant'. City and Consultant may be
referred to herein individually as a Party, or collectively as the Parties.
WITNESSETH
That for and in consideration of mutual covenants and agreements herein contained, the
Parties hereto mutually agree as follows:
ARTICLE 1
SERVICES
Section 1.
Consultant hereby agrees to perform as an independent contractor the services set forth in
the Scope of Services attached hereto as Attachment "A". These services shall be
performed in connection with the Lower Mary's Creek Open Chamiel Study (SWS-009)
Section 2.
Additional services, if any, will be requested in writing by the City. City shall not pay for
any work performed by Consultant or its subconsultants, subcontractors and/or suppliers
that has not been ordered in writing. It is specifically agreed that Consultant shall not be
compensated for any alleged additional work resulting from oral orders of any person.
ARTICLE 2
COMPENSATION
Consultant shall be compensated in accordance with the Fee Schedule shown in
Attachment "B". Payment shall be considered full compensation for all labor, materials,
supplies, and equipment necessary to complete the services described in Attachment "A".
However the total fee paid by the City shall not exceed a total of $243,046 unless the City
and the Consultant mutually agree upon a fee amount for additional services and amend
this Agreement accordingly.
The Consultant shall provide monthly invoices to
rendered shall be due witInin thirty (30) days of th
the City. Payment for services
e uncontested performance of
i ,,., 4 .,9EF;C1AL RECORD
1-ITY SECRETARY
��TB 11bi'0RTH, TX.
particular sen7ices so ordered and receipt by Cite of Consultant's invoice for payment of
same.
Acceptance by Consultant of said payment shall operate as and shall release the City
from all claims or liabilities under this Agreement for anything related to, done. or
furushed in connection «7ith the services for which payment is made, including any act
or omission of the City in connection «pith such services.
Unless terminated pursuant to the terms herein, this Agreement shall be for a tern of t<�, o
years, beginning upon the date of its execution, or until the completion of the subject
matter contemplated herein, whichever occurs first.
ARTICLE 4
INDEPENDENT CONTRACTOR
Consultant shall operate hereunder as an independent contractor, and not as an officer,
agent, servant; or employee of the City. Consultant shall have exclusive control of and
the exclusive right to control the details of its work to be performed hereunder and all
persons performing same, and shall be solely responsible for the acts and omissions of its
officers, agents, employees, contractors and subcontractors. The doctrine of respondent
superior shall not apply as between City and Consultant, its officers, agents, employees,
contractors, and subcontractors; and nothing herein shall be construed as creating a
partnership or joint venture between City and Consultant.
ARTICLE 5
PROFESSIONAL COMPETENCE AND INDEMNIFICATI011T
Section 1.
���ork performed by Consultant shall comply in all aspects with all applicable local, state
and federal la�� s and with all applicable rules and regulations promulgated by the local,
state and national boards, bureaus and agencies. Approval by the City shall not constitute
or be deemed to be a release of the responsibility and liability of Consultant or its
officers, agents, employees; contractors and subcontractors for the accuracy and
competency of its services performed hereunder.
Section 2.
In this connection, Consultant shall indemnify; hold harmless arld defend the City and its
officers, agents, servants and employees from and against any and all claims or suits for
property damage or loss and/or personal injury, including death, to any and all persons of
whatsoever kind or character; including but not limited to employees of Consultant,
Consultant's subcontractor's, employees of Consultant's subcontractors, and all other
persons performing work incident to this Agreement which may rise out of or be
connected with directly or indirectly with performance of this Agreement. Consultant
shall 11kCN�TlSe indemnify, and hold harn7less. City for an)% and all injure or damage to City
property arising out of. or in connection ��7ith, any and all acts or omissions of Consultant.
its officers, agents; employees or subcontractors.
ARTICIIE 6
INSURANTCE
Section 1.
Consultant shall not continence work under this Agreement until it has obtained all
insurance required under this Article and the City has approved such insurance, nor shall
Consultant allo«7 any subcontractor to commence work on its subcontract until all similar
insurance of the subcontractor has been so obtained and approval given by the Ci7 ;
provided. however. Consultant may elect to add any subconsultant as an additional
insured under its liability policies.
Commercial General Liabilin
S1,000,000 each occurrence
$1,000,000 aggregate
Automobile Liabilit��
510000 each accident (or reasonably equivalent limits of
coverage if written on a split limits basis). Coverage shall
be on any velucle used in the course of the Project.
R�orker's Compensation
Coverage A: statutory limits
Coverage B: $100,000 each accident
$500,000 disease - policy limit
$100,000 disease - each employee
Section 2.
Additional Insurance Requirements
a. Except for employer's liability insurance coverage under Consultant°s
«porker's compensation insurance policy; the CitS�, its officers, employees and
servants shall be endorsed as an additional insured on Consultants insurance
policies.
b. Certificates of insurance shall be delivered to the Transportation and Public
«corks Department; Attention: Steve Eubanks, 1000 Throckmorton Street. Fort
)A7orth, TX 76102, prior to commencement of work.
c. Any failure on part of the Cite to request required insurance documentation
.shall not constitute a ��,�aiver of the insurance requirements specified herein.
d. Each insurance policy shall be endorsed to provide the City a minimum thirmy
days notice of cancellation; non -renewal, and/or material change in policy terns
or coverage. A ten days notice shall be acceptable in the event of non-payment
of prenniuln.
e. Insurers must be authorized to do business in the State of Texas and have a
current A.M. Best rating of A: VII or equivalent measure of financial strength
and solvency.
f. Other than «orker's compensation insurance, in lieu of traditional insurance;
City may consider alternative coverage or risk treatment measures through
insurance pools or risk retention groups. The City must approve in writing any
alternative coverage.
g. Vdorkers' compensation insurance policy(s) covering employees employed on
the Project shall be endorsed with a «7aiver of subrogation providing rights of
recovery in favor of the City.
h. CitS� shall not be responsible for the direct payment of insurance premium
costs for Consultant's insurance.
i. Consultant's insurance policies shall each be endorsed to provide that such
insurance is primary protection and any self4unded or commercial coverage
maintained by City shall not be called upon to contribute to loss recovery.
j. In the course of the Agreement, Consultant shall report, in a timely manner, to
City's officially designated contract administrator any kno«Tn loss occurrence
which could give rise to a liability claim or la«7suit or iwhich could result in a
property loss.
k. Consultant's liability shall not be limited to the specified amounts of insurance
required herein.
1. Upon the request of City, Consultant shall provide complete copies of all
insurance policies required by these Agreement documents.
ARTICLE 7
TRAllTSFER OR ASSIGNMENT
City and Consultant each bind themselves; and their lawful successors and assigns, to this
Agreement. Consultant; Its la«�ful successors and assigns; shall not assign; sublet or
transfer any interest in this Agreement without prior N-witten consent of the City.
ARTICLE 8
TERMINATION OF CONTRACT
z
Section 1.
City may tenminate this Agreement for its convenience on 30 days' written notice. Either
the City or the Consultant for cause mad- terminate this Agreement if either Party fails
substantially toperform through no fault of the other and does not commence correction
of such nonperformance «71th 5 days of written notice and diligently complete the
correction thereafter
eetion 2.
If Cite chooses to terminate this Agreement under Article 8; upon receipt of notice of
termination, Consultant shall discontinue services rendered up to the date of such
tenmination and City shall compensate Consultant based upon calculations in Article 2 of
this Agreement and Exhibit "B" attached hereto and incorporated herein.
�ectlon 3.
All reports, «-hether partial or complete.. prepared under this Agreement; including any
original dra« ings or documents. whether furnished by the City, its officers, agents,
employees, consultants, or contractors, or prepared by Consultant, shall be or become the
property of the City, and shall be furnished to the City prior to or at the time such
services are completed, or upon termination or expiration of this Agreement.
ARTICl✓E 9
RIGHT TO AUDIT
(a) Consultant agrees that the Ciry shall until the expiration of three (3) years after final
payment under thus Agreement, have access to and the right to examine any directly
pertinent books; documents, papers and records of Consultant involving transactions
relating to this Agreement. Consultant agrees that the City shall have access during
nonnal �A7orking hours to all necessary facilities and shall be provided adequate and
appropriate workspace in order to conduct audits in compliance with the provisions of
this section. City shall give Consultant reasonable advance notice of intended audits.
(b) Consultant further agrees to include in all its subcontracts hereunder, a provision to
the effect that the subcontracting consultant agrees that the Cite shall. until the
expiration of three (3) years after final payment under the subcontract, have access to
and the right to examine any directly pertinent books, documents, papers and records
of such subconsultant, involving transactions to the subcontract, and further, thatCity
shall have access during normal Nvorking hours to all subconsultant facilities, and
shall be provided adequate and appropriate work space in order to conduct audits in
compliance with the provisions of this article. City shall give Consultant and any
subconsultant reasonable advance notice of intended audit.
(c) Consultant and subconsultants agree to photocopy such documents as may be requested
by the Cite. The Cit�T agrees to reimburse Consultant for the cost of copies at the rate
published in the Texas Adnninistrative Code in effect as of the time copying is
performed.
c
ARTICLE lu
I�11NORITY AND WOMAN BUSINESS ENTERPRISE
(.N1AN7BE) PARTICIPATION
In accordance «ith Ci) Ordinance U. 1J�30, the Cit< has goals for the participation of
minority business enterprises and woman business enterprises ("MINVBE") in City
contracts. Consultant acknowledges the NV'WBE goal established for this Agreement and
its commitment to meet that goal. Any misrepresentation of facts (other than a negligent
misrepresentation) and/or the commission of fraud by the Consultant may result in the
termination of this Agreement and debarment from participating in City contracts for a
period of time of not less than three (3) years.
ARTICLE II
OBSERVE AND COMPLY
Consultant shall at all times observe and comply with all federal, state, and local laws and
regulations and with all City ordinances and regulations which in any way affect this
Agreement and the work hereunder; and shall observe and comply with all orders. laws
ordinances and regulations which may exist or may be enacted later by governing bodies
having jurisdiction or authority for such enactment. No plea of nusunderstand na or
ignorance thereof shall be considered. Consultant agrees to defend, indemnify and hold
harmless City and all of its officers, agents and employees from and against all claims or
liability arising out of the violation of any such order, law, ordinance, or regulation. whether
it be by itself or its employees.
ARTICLE 1Z
VENUE Ally JUItISDICTI01!'
If any action, whether real or asserted, at Iaw or in equity; arises on the basis of any
provision of this Agreement; venue for such action shall lie in state courts located in
Tarrant County, Texas or the United States District Court for the Northern District of
Texas — Fort Worth Division. This Agreement shall be construed in accordance with the
laws of the State of Texas.
ARTICLE 13
CONTRACT CONSTRUCTION
The Parties acknowledge that each party and, if it so chooses.. its counsel have reviewed
and revised this Agreement and that the normal rule of construction to the effect that any
ambiguities are to be resolved against the drafting party must not be employed in the
interpretation of this Agreement or any amendments or exhibits hereto.
ARTICLE 14
SEVERABILITY
The provisions of this Agreement are severable, and if any word, phrase, clause,
sentence. paragraph, section or other part of this Agreement or the application thereof to
any person or circumstance shall ever be held by any court of competent jurisdiction to
be invalid or unconstitutional for any reason, the remainder of this Agreement and the
application of such word, phrase, clause; sentence., paragraph, section, or other part of
thus Agreement to other persons or circumstances shall not be affected thereby and this
Agreement shall be construed as if such invalid or unconstitutional portion had never
been contained therein.
ARTICLE 15
NOTICES
I�Totices to be provided hereunder shall be sufficient if for«�arded to the other Part�� by
han&delivery or via U.S. Postal Service certified mail return receipt requested, postage
prepaid, to the address of the other Party shown below:
City of Fort «Torth
Attn: Steve Eubanks
Transportation and Public ��Torks Department
1000 Throckmorton Street
FortWorth. Texas 76102
Freese and Nichols. Inc.
4055 International Plaza, Ste. 200
Fort Worth, Texas 76109
ARTICLE 16
I EAMINGS
The headings contained herein are for the convenience in reference and are not intended
to define or limit the scope of any provision of this Agreement
ARTICLE 17
COUNTERPARTS
This Agreementmay be executed in one or more countezparts and each counterpart shall,
for all purposes, be deemed an ornal but all such counterparts shall together constitute
but one and the same instrument.
(Remainder of Page Intentionally Left Blank)
IN WITNESS THEREOF, the parties hereto have made and executed this Agreement in
multiple originals the day and year first above Nwitten, in Fort Worth, Tarrant County,
Texas.
CITY OF FORT WORTH:
L
Fernando Costa
Assistant City Manager
RECOI���I�TDED:
C?St
William A. erkest. P .. Director
Department of Transportation and Public N 7ork
APPROVED AS TO FORM AND
LEGALITY:
City Secretary
Date
FREESE AND I��ICHOLS. INC:
Contrgt Authorization
�.� laa- og
4� c
�FE►CiAL i�ECpRt�
ETo WORTH„ TX
ATTACHMENT "A"
LOWER MARY'S CREEK OPEN CHANNEL STUDY
Preface
Over the years, the City of Fort Worth has experienced growth and development
throughout. As a result, some of the current floodplain delineations and studies may be
outdated. Some streams within the City were never studied in detail. The purpose of
these open channel studies is to assess the existing conditions of select open channels
and to develop a master plan of improvements as needed. The existing conditions
analysis includes detailed hydrologic and hydraulic analyses to determine probable
flooding areas during exceedance storms and a comparison of results to existing
studies (if available). The revision or development of a master plan of improvements for
the study area will include a set of conceptual improvement alternatives to minimize
flood impacts to homes and buildings. These studies may require the submittal of a
LOMR to FEMA if the resultant flood analysis is significantly different from the current
flood insurance study delineation and base flood elevations. Because of the number of
studies that will be conducted, the City would like to develop a standardized approach
for consistent data management and model development. The City has embarked on
the development of a GIS inventory of the existing storm water management system.
These studies will have data that will be relevant to the City's ongoing GIS inventory.
Therefore, the submittal of GIS data to the City is required. For data management
purposes, all of the reports and detailed analyses will be submitted to the City in an
approved format. A standardized approach to documentation, submittals and approach
will assist the City with data management of these and future studies.
ATTACHMENT "A"
Page 1 of 19
LOWER MARY'S CREEK OPEN CHANNEL STUDY
STUDY NO. 0W0-009
Project Summary
a. Purpose of Study
Freese and Nichols (ENGINEER) are pleased to submit this proposal for preparation of
a flood study for Marys Creek (See Attached Exhibit B). The Federal Emergency
Management Agency (FEMA) floodplain map shows that Marys Creek has a defined
floodplain noted as Zone AE on the FIRM and a defined floodway. The ENGINEER
understands that the CITY has two needs regarding Marys Creek. First, the
ENGINEER will analyze the existing and fully developed watershed for Marys Creek
using best available data. Second, the ENGINEER will reestablish base flood
elevations along the Marys Creek to more accurately define the existing condition
floodplain and to update this information on the effective FIRM. To accomplish this the
ENGINEER proposes to complete an existing condition study for this project by
developing hydrologic and hydraulic models to reflect current conditions and floodplain
limits to the extents reflected on Exhibit B. After modeling is complete a report will be
developed for CITY review that will be suitable for FEMA submittal as a Letter of Map
Revision (LOMR) if so desired by CITY.
The ENGINEEP.'s services and products resulting from this study shall be referred to as
'Marys Creek Open Channel Study". The ENGINEER shall perform the project services
in accord with (1) the Federal Emergency Management Agency floodplain modeling and
mapping specifications and guidelines, (2) the City of Fort Worth Storm Water
Management Design Manual, and (3) specific requirements and technical guidelines in
this scope document. The City of Fort Worth Storm Water Management Design Manual
shall be the prevailing document.
b. Pertinent Data
The reach of Marys Creek to be studied for this Open Channel Study is from the
confluence with the Clear Fork Trinity River upstream to the Winscott-Vickery crossing.
This watershed lies in both the Cities of Benbrook and Fort Worth. The current effective
FEMA model for Marys Creek shows extensive flooding in Ridglea Country Club
Estates at the Marys Creek confluence with the Clear Fork Trinity River. The model is
believed to be inaccurate in this area due to past modifications to the Clear Fork model
reflecting the detention effects of Benbrook Lake and very conservative flows on Marys
Creek, and inadequate modeling of the confluence of Marys Creek with the Clear Fork
of the Trinity River. Because both cities are affected, the City of Benbrook has agreed
to participate with Fort Worth in a new study to correct the mapping inaccuracies in this
area.
ATTACHMENT "A"
Page 2 of 19
Task 1: Project Management
The ENGINEER'S project management activities shall include task leadership and
direction, telephone and written communication, bkmonthly project update meetings,
project status reports, project schedule and updates, and personnel and data
management among other general project management activities. Any delays to the
project schedule shall be in writing to the City of Fort Worth for review and approval.
The ENGINEER shall attend the project kickoff meeting with a proposed schedule for
task sequence and completion. The ENGINEER's Project Manager shall schedule and
lead all project meetings. Meeting notes shall be submitted to the City of Fort Worth's
Project Manager within five working days after each meeting. The ENGINEER shall
attend [minimum of one, ENGINEER modify number according to project] public
meeting to present what possible mitigation alternatives are being explored. The
ENGINEER will provide to the City project information regarding proposed mitigation
alternatives (if applicable) for public outreach.
The ENGINEER .will fully document all relevant hardware, software, file structures, and
data formats used during the project. The details and structure to be followed are
included in EXHIBIT A-1. The draft and final report format to be followed is included in
EXHIBIT A-2. Other than intermittent meetings, all of the individual Task deliverables
shall be submitted with the draft and final report at the conclusion ,of the study. The
ENGINEER shall update a Project Certification and Decision Log to be submitted at the
completion of the study.
�ENG/NEER: Add to project task unique activities particular to study that are beyond
the standard scope.)
Task 1 Deliverables:
• Documentation
o Summary of Tasks
o Project Schedule
o Support Data — Relevant meeting notes and email correspondence,
project status updates, and action items for ENGINEER, sub -consultants,
and the City of Fort Worth.
o Completed Proje
study.
Certification
and Decision Log upon completion of the
Task 2: Data Search, Collection, Field Reconnaissance, Stream Condition
Assessment, and Surveys
a. Dataset Search and Collection
The City of Fort Worth will provide the ENGINEER with the following watershed data in
GIS format, in addition to the available models and reports: stream centerlines, street
centerlines, 2007 aerial imagery, 2007 terrain surface in LAS format, existing and future
land use data, 2007 subbasin delineations (may not be delineated for each site), high -
ATTACHMENT
Page 3 of 19
water marks (if available), and zoning maps. Historical rainfall data and the as -built
drawings of the hydraulic structures may be available from the City. The ENGINEER
shall submit a written request to FEMA for all relevant available data from the effective
Flood Insurance Study (FIS) including but not limited to: LOMRs, hydrologic and
hydraulic data, reports, working maps, etc. The City shall determine the extent of the
study along the stream.
The ENGINEER shall use the City -provided watershed description, stream centerline,
and 2007 terrain surface as part of the base data for modeling and mapping. If
necessary, the ENGINEER may modify the stream centerline alignment during Tasks 3
and 4 according to topography, 2007 aerial imagery, or new survey data. Any errors
identified or revisions made to the City's stream centerline and watershed boundary
datasets shall be reported and discussed with the City's Project Manager.
The ENGINEER will review and identify known flooding and drainage issues referred to
as "hot spots" within the study area. The City will provide available drainage complaint
reports to the ENGINEER. The identified "hot spots" shall be compiled into a GIS
geodatabase.
The City of Fort Worth's Storm Water Management Division shall assist the ENGINEER
in locating required data available from the City, but the ultimate responsibility for
identifying data needs and for finding, collecting, developing, analyzing, and creating all
necessary data shall reside with the ENGINEER. If required data is unavailable, the
ENGINEER shall inform the City in writing and discuss with the City's Project Manager
for actions or determination.
b. Field Reconnaissance
The ENGINEER shall perform field reconnaissance to become familiar with the main
stem and the appropriate tributaries, the hydraulic and hydrologic structures, land use,
vegetative cover conditions of the floodplain, and special features and problems within
the watershed. The ENGINEER is aware that not all natural channels are contained
within City easements therefore property owner permission must be obtained by the
ENGINEER to access private property. The ENGINEER shall document their
reconnaissance efforts findings with labeled digital photographs. Typical channel and
over -bank types shall be photographed and labeled with location and Manning "n" value
assumptions.
The ENGINEER shall document physical characteristics of the watershed relevant to
modeling, including but not limited to: specific features of all major detention ponds and
outlet discharge structures, vegetative and built structure conditions along the
floodplains, types and number of hydraulic structures involved, apparent maintenance
condition of channels, over -banks and existing hydraulic structures, locations and
descriptions of stream cross -sections to be surveyed (including bridge railings and
obstructed flow areas).
c. Stream Condition Assessment
ATTACHMENT"A"
Page 4 of 19
The ENGINEER shall perform a stream condition assessment as a result of field
reconnaissance efforts and document the locations of observed erosive conditions,
channel stability issues, channel side -slope failure, failed channel protection, sediment
transport, and/or other observed failures. The ENGINEER may assign a rating of
"Excellent", "Good", "Fair", or "Poor". The ENGINEER shall document the stream
conditions assessment efforts with labeled digital photographs. The ENGINEER shall
populate a GIS geodatabase of identified areas of concern.
d. Field Surveys
All bridges, culverts, and critical stream cross -sections (having substantial change in
channel geometry and/or bed slope in contrast to upstream or downstream cross -
sections) should be surveyed. The field surveys shall include any headwalls and
outfalls along the channel. The maximum stream length distance between any two
surveyed cross -sections shall not exceed approximately 1,500 feet. The City's Project
Manager shall review the number of open channel cross-section and hydraulic structure
surveys prior to a final scope of work. (The ENGINEER is to include the number of
open channel cross-section and hydraulic structure surveys in the final scope.] The
ENGINEER shall follow the current version of FEMA Guidelines and Specifications for
Flood Hazard Mapping Partners Appendix N: Data Capture Guidelines to collect field
survey data for open sections, bridges, culverts, and dams.
Benchmarks shall be located and recorded for survey control. Available elevation
reference marks shall be located and recorded at surveyed hydraulic structures. If
elevation reference marks can not be located, they may be set at each surveyed
hydraulic structure as a chiseled mark in a headwall, wingwall, bridge deck, etc in a
manner suitable for future reference. The ENGINEER shall establish primary and
secondary control points for survey. Primary control points are typically iron rods that
are suitable for future reference. Secondary control points are set at each surveyed
cross-section and are intended to establish the primary control data at each cross-
section. Secondary control points are typically nails and are not intended to be
permanent. The current version of FEMA Guidelines and Specifications for Flood
Hazard Mapping Partners Appendix N. Data Capture Guidelines shall be used a guide
to setting elevation reference marks.
Field surveys of stream cross -sections shall be representative of the natural ground of
the channel and overbanks. Surveys of bridges, culvert, dams or other hydraulic
structures shall be representative of the hydraulic structure's geometry. A typical
ground cross-section shall be surveyed upstream of the structure. Measurements and
survey points defining the geometry of the hydraulic structures shall all be recorded in
field notes.
Field survey notes shall represent graphically and clearly, in plan and profile view, what
was surveyed, photographed, and recorded. All of the sketches should depict the
upstream face of the structure as well as the direction of flow.
ATTACHMENT "A"
Page 5 of 19
Digital photos shall be taken at each surveyed stream cross-section looking upstream
and looking downstream at the channel. Photos of the upstream and downstream faces
A the hydraulic structures shall be taken along with the upstream and downstream
channel. Wherever possible, the pictures should contain the entire face of the structure.
The ENGINEER will use the survey codes and format outlined in the FEMA Guidelines
and Specifications for Flood Hazard Mapping Partners Appendix N. Data Capture
Guidelines for survey text files. The text files shall include point number, northing,
Basting, elevation, and description. The ENGINEER shall submit the survey data as
text files and in a GIS shapefile format.
It is the responsibility of the ENGINEER to obtain property owner permission to perform
surveys outside of City easements. The ENGINEER shall notify the local property
owners that surveys and field reconnaissance will be conducted for a certain period
time.
e. Finished Floor Elevations
The ENGINEER shall determine the finished floor elevations and lowest adjacent
grades of buildings and residential homes within the current effective floodplain and
anticipated revised areas. The ENGINEER shall meet with the City's Project Manager
and discuss which buildings and homes will be surveyed prior to a final scope of work.
Finished floor elevations shall be a separate budget item from the field surveys.
(ENGINEER: Add to project task unique activities particular to study that are beyond
the standard scope.]
Task 2 Deliverables:
• Documentation
o Data Collection —Summary of Data Collection efforts and methodology
including a list of data collected and sources and locations of reported
flooding "hot spots" within the immediate study area.
o Field Reconnaissance — Summary of Field Reconnaissance efforts
including labeled digital photos and locations of special physical
characteristics relevant to modeling and number and locations of
crossings.
o Stream Condition Assessment — Summary of assessment including
labeled digital photos and locations of observed areas of concern. The
ENGINEER shall include labeled digital photos and comments on
conditions.
o Field Surveys — Summary of field survey efforts including primary control
points and locations, elevation reference marks, and locations of surveyed
roadway crossings and open sections.
o Finished Floor Elevations — Summary of finished floor elevation survey
efforts including homes and structures surveyed, finished floor elevations,
and lowest adjacent grade.
• Digital Data
ATTACHMENT "A"
Page 6 of 19
o Data Collection — Data collected from the City and other sources for the
study.
o Field Reconnaissance — Labeled digital photos and locations of areas of
concern.
o Stream Conditions Assessment — Labeled digital photos and locations of
areas of concern and a GIS geodatabase of identified areas of concern.
o Field Surveys
■ Text Files: Survey text files in ASCII format of primary control
points, secondary control points, elevation reference marks,
surveyed hydraulic structures and stream cross -sections.
■ Field Notes: Field notes in PDF format of surveyed hydraulic
structures and stream cross -sections.
® Photos: Labeled digital photos of surveyed hydraulic structures and
stream cross -sections.
■ GIS Files: Shapefiles of survey data of primary control points,
elevation reference marks, and hydraulic structures and stream
cross -sections.
■ Work Maps: Work maps depicting survey data and locations.
o Finished Floor Elevations
■ Text Files: Survey text files in ASCII format of finished floor
elevations and lowest adjacent grade.
■ Field Notes: Field notes in PDF format taken during survey efforts.
■ GIS Files: Shapefiles of survey data of finished floor elevations and
lowest adjacent grade.
■ Work Maps: Work maps depicting survey data and locations.
o ENGINEER will provide all the finished floor survey data including control,
finished floor elevations lowest adjacent grade elevations and locations,
GIS files, field notes, and ASCII text files.
• One set of CD/DVDs containing electronic versions of all information
(intermediate and final data and photos) gathered in this Task.
Task 3: Development of Detailed Hydrologic Models
The ENGINEER shall develop detailed existing la
development land -use conditions based on 2009
id -use
uns with respect to the return period. The ENGINEER
ATTACHMENT "A"
Page 7 of 19
The ENGINEER shall use the 2-, 5-, 10-, 25-, 50-, 100-, and 500-year return events to
develop hydrologic and hydraulic models, water surface elevation profiles, and
floodplain maps. If the basin is fully developed then ultimate land -use conditions will be
assumed as "Existing Conditions". The ENGINEER shall model the 100-yr return event
for ultimate conditions if existing conditions in the basin are not fully developed. The
ENGINEER shall use representative historical rainfall data to perform hydrological
analysis to perform a high water mark simulation/validation with hydraulic models.
a. Rainfall
The ENGINEER shall use a 24-hour duration storm (SCS Type II or frequency) for the
meteorological model and shall use the City of Fort Worth Storm Water Management
Design Manual Appendix A rainfall depth -duration -frequency tables.
b. Data Sources
The ENGINEER shall review the current effective hydrologic and hydraulic models,
Letters of Map Revision (LOMRs) approved after the current effective FIS study and
City of Fort Worth land development projects and incorporate them into the study as
appropriate.
The ENGINEER may obtain "as built" drawings from the City (if available) for
constructed regional ponds and other large residential and commercial ponds to be
modeled. The stage -storage -discharge (SSD) rating curve for these ponds used in the
model shall be verified as being accurate. If necessary, the SSD curves may be re-
developed. In all cases, the SSD rating curve shall be the same for both the hydrologic
and hydraulic models.
The existing land -use conditions data, the 2009 projected future (ultimate) development
land -use conditions data, topographic data (2007 ACS surface data), and the latest
Natural Resources Conservation Service (MRCS) Soil Survey Geographic (SSURGO)
database shall be used in the hydrologic model development.
c. Model Development
The ENGINEER shall coordinate watershed boundaries with other concurrent studies.
The subbasin size shall not exceed one-third of a square mile. Use of larger subbasins
shall be discussed with the City's Project Manager. Break points (junctions) may be set
at certain locations if requested by City's Project Manager, The ENGINEER shall
conduct a "working session" with City staff to finalize watershed basin boundaries and
junctions.
If a conflict exists on a watershed boundary determination, it is usually the topographic
dataI not the storm drain system, that determines the watershed boundaries. However,
if storm drain trunk lines or any other diversion/by-pass hydraulic structures exist in the
watershed and divert a significant amount of flow from one basin to another, those
hydraulic structures shall be modeled in the study.
ATTACHMENT "A"
Page 8 of 19
The SCS unit hydrograph shall be utilized for developing the HMS model.
The TR-55 equations and curves for estimating the time of concentration for overland
(sheet) flow, shallow concentrated flow, and channel flow shall be used. Overland
(sheet) flow length shall be no more than 50 — 100 feet for urban land -use conditions.
The ENGINEER shall delineate and depict the longest flow path per subbasin and
include the length and time of concentration per segment.
The SCS curve number method shall be used for loss rate estimation.. The ENGINEER
shall prepare a table of impervious cover percentages and curve numbers for various
land uses and soil conditions based on the City of Fort Worth Storm Water Management
Design Manual. The runoff curve numbers for open space and undeveloped areas shall
be based on the cover type and hydrologic condition of "Open Space, Good Condition."
The composite curve number for each subbasin shall be computed based on a
composite percentage of soil types.
For modeling the existing land -use conditions of a suburban watershed, the impervious
cover percentage shall be determined based on zoning districts. Impervious cover
percentages per zoning district are listed in Table 1.
The ENGINEER shall use the NCTCOG existing land -use spatial data and City 2007
aerial imagery to confirm that the current zoning districts have an accurate land use
assignment. It is the ENGINEER's responsibility to properly determine the impervious
,over percentage for sparsely located farmland houses which may or may not be
directly connected to a surface drainage system. The ENGINEER shall use the City
2009 comprehensive plan to determine the impervious cover percentage for ultimate
conditions for future growth and development. The composite impervious cover
percentage and soil -based composite runoff curve numbers for each subbasin shall be
summarized in a table of subbasin parameters.
Table 1. City of Fort Worth Suburban Existina Land Use Impervious Cover
Land -use Code
Land -use Description
Average Percent Impervious
AG
Agricultural
35
CF
Community Facilities
85
DD
Demolition Delay
85
HC
Historic and Cultural
85
HSE
Highly Sig, Endan e.
85
MH
Manufactured Housing
65
PD
Planned Development
85
A-2.5A
One Family (min 2.5 acre)
35
A43
One Family (min 1 acre)
35
A-21
One Family (min 0.5 acre)
37
A-10
One Family (min 10,000 sq. ft.)
49
A-7.5
One Family min 7,500 s . ft.
55
A-5
One Family min 5,000 s . ft.
61
ATTACHMENT "A"
Page 9 of 19
AR
One Family Restricted min 3,500 s . ft.).65
B
Two Family
65
R1
Zero Lot Line/Cluster
65
R2
Townhouse/Cluster
65
CR
Low Density Multifamily
40
C
Medium Density Multifamily
55
D
High Density Multifamily
65
MU-1, MUAG
MU-2, MU-2G
Low Intensity Mixed -Use
High Intensity Mixed -Use
96
96
TU
Trinity Uptown
96
ER
Neighborhood Commercial Restricted
96
E
Neighborhood Commercial
96
FR
General Commercial Restricted
96
F
General Commercial
96
G
Intensive Commercial
96
H
Central Business
96
I
Light Industrial
96
J
Medium Industrial
96
K
Heavy Industrial
96
d. Routing
The ENGINEER shall use the Modified Puls or the Muskingham-Gunge routing methods
to attenuate the runoff hydrograph. Other routing methods shall require the approval of
the City.
e. Depth -Area Analysis
Depth -Area Analysis (areal reduction) shall be used for watersheds with a drainage
area of 9.6 square miles or greater. If necessary, peak flow tables for each return
period and for both existing and future land -use conditions will be provided with peak
flows computed at all subbasin outlets and hydrologic junction points with areal
reduction for drainage areas (in square miles) of 0.0, 10, 20, 30, etc. up to the total
watershed area. The peak discharge will be interpolated based on the drainage area at
the appropriate junction location. The following is an example of the table.
100-Year Peak Flows (cfs) Under Existing Land -Use
Conditions`:
Hydrologic
Element
Drainage
Area
(sq mi
Storm
Area
0 mi2
Storm
Area
10 mil
Storm i
Area
20 mi2
Storm
Area
30 mi2
J160W
7.576
12140
11610
11150
10770
J160K
8.011
12160
11750
11360
11030
JWCR160
15.587
22230
21460
20770
20190
WCR160
15.587
22070
21320
20620
20020
J130W
15.767
22110
21350
20660
20060
ATTACHMENT "A"
Page 10 of 19
JWCR130
17.91
24390
23570
22810
1 22090
JWCR120
18.364
24820
23990
23210
22470
WCR1100
18.364
24680
23840
23050
22350
JWCR1170
18.78
24790
23950
23160
22450
WCR120 1
18.78 1
24730
23890 1
23100
22410
To estimate the 100-year peak flow at the junction J130W, one may code a linear
interpolation formula in an Excel Spreadsheet to linearly interpolate the 100-yr peak flow
at this junction location, e.g., Q(Jl30W)=21350+(156767-10)/(20-10)*(20660-
21350)=20952 cfs.
f. Results
The model results shall be compared to available reliable recorded/historical rainfall.
runoff data, including historic storm events. If no reliable recorded/historical rainfall.
runoff data is available, the ENGINEER may run checks with other sources of data such
as the local/regional regression equations, Current Flood Insurance Study, or the
USGS's frequency -based 100-year peak flow versus watershed drainage area curve for
similar watersheds. If significant differences are found, adjustments to the hydrologic
model may be required.
The ENGINEER shall prepare a table of peak flow rates for each of the return events
analyzed. The ENGINEER shall compare the peak flows from the new study to those of
the current effective (if available). The comparisons shall be summarized in the report.
The ENGINEER shall document the methodologies and assumptions for each subbasin,
details of calculating the time of concentration, subbasin and longest flow path
delineations, creek centerline, software, and data sources used, any significant changes
in flows between the old and new hydrologic models with an explanation of differences,
and a table containing peak flows at each subbasin, junction, and pond location with
areal reduction (if applicable), and any special technical issues and resolutions.
�ENG/NEER: Add to task project unique activities particular to study that are beyond
the standard scope. j
Task 3 Deliverables:
• Documentation
o A summary of the Task and a description of methodologies and
assumptions used. The detailed summary shall include design criteria,
software used, source data, watershed delineation method, watershed
parameters, modeling considerations, and any special technical issues
and resolutions.
o A summary of results and a comparison with effective discharges.
o Any relevant correspondences, discussions, and technical decisions
regarding model development including review comments and special
issues.
• Digital Data
ATTACHMENT "A"
Page 11 of 19
o Hydrologic Model: One digital copy of the final, working, and fully -
annotated HEC-HMS hydrologic model that provides peak flow rates for
the 2-, 5-, 10-, 25-, 50-1 100-, and 500-year floods together with all
supportive GIS and modeling data (including DSS files) for the HEC-HMS
models (current non -beta HEC-HMS version at time of delivery).
o GIS Data: Supportive GIS and modeling data including the watershed
delineation, longest flow path. (If applicable) An ArcGIS 9.2 or later
version of a personal geodatabase containing all final vector information
developed under this task.
o Support: Electronic versions of all information gathered, supporting
materials and data in developing the hydrologic models, and work
products created in this task, such that the models can essentially be
duplicated with the backup data.
• The ENGINEER shall submit two sets of DVDs containing electronic versions of
all information gathered and work products created in this task.
Task 4: Development of Hydraulic Models and Floodplain Maps
The ENGINEER will use the latest HEC-RAS model software to develop hydraulic
models for the study. The ENGINEER may use HEC-GeoRAS as a preprocessor to
provide base information to the hydraulic model and as a post -processor to map the
floodplains. The ENGINEER shall fully annotate the HEC-RAS model, including
descriptive comments in all relevant fields, and clearly label the flow data profiles with
respect to return period. Cross -sections or bridge/culvert structures that incorporate
survey data shall include the survey data source, date and hydraulic structure name in
the cross section data description. The ENGINEER may use FEMA's CHECK-RAS
program to do an initial verification of the HEC-RAS models and address the issues it
finds or provide an explanation of why a correction was unnecessary. The hydraulic
model will be fully geo-referenced for seamless incorporation into the City's GIS
inventory.
a. Model Development
The ENGINEER shall prepare the models to run under steady state conditions. The
ENGINEER will meet with the City's Project Manager to determine whether an unsteady
state model is warranted.
Surveyed bridges, culverts, and critical stream cross -sections (having substantial
change in channel geometry or slope) shall be incorporated into the HEC-RAS model.
Other non -critical stream cross -sections shall be cut from the City's topographic data (if
available) or the most accurate topographic data available. The cross-section layout
shall be set in a reasonable manner consistent with the respective DFIRM (if available)
taking into consideration hydraulics and floodplain mapping. As a general guideline,
ATTACHMENT"A"
Page 12 of 19
spacing between any two cross -sections shall not exceed approximately 200 ft unless
directed by the City's Project Manager. The ENGINEER will conduct a "working
session" with the City staff to review cross -sectional cut -line locations and layout. The
ENGINEER will proceed with detailed hydraulics following City's review of the cross-
section cut -line layout or as directed by the City's Project Manager. The ENGINEER
shall discuss with the City's Project Manager whether channel invert interpolation
between surveyed cross -sections is required. Interpolated cross -sections shall be kept
to a minimum. If interpolated cross -sections are used in the development of the
models, each section shall be labeled and described in the model and identified on a
work map of the cross-section layout. The ENGINEER shall describe in the written the
report the purpose of the interpolated cross -sections. All cross-section stations and
reach lengths shall be rounded to the nearest foot.
The ENGINEER shall assign Manning's n-values to a specific channel or over -bank
area based on actual physical conditions using information from field reconnaissance,
aerial photos, and the City of Fort Worth Storm Water Management Design Manual n-
value reference tables. Composite n-values are recommended for the left overbank,
channel, and right overbank. Caution will be exercised not to over- or under -estimate
the "n" values. The composite "n" value in over bank flow areas shall be limited to 0.15.
For any "n" value exceeding 0.15, the ENGINEER shall inform and discuss with the
City's Project Manager for a final decision. It is recommended that the ENGINEER use
the HEC-RAS functions of "blocked obstruction" and "ineffective flow area" whenever to
enhance the model.
The ENGINEER shall recreate or confirm the limits of the floodway. A floodway will not
be evaluated or created for study areas that do not have an existing floodway.
b. Flow Data
Peak flows computed from a hydrologic model with proper areal reduction (if applicable)
shall be put into the hydraulic model as close as possible in terms of location, e.g.,
subbasin junction location in HEC-HMS versus cross-section location in HEC-RAS. A
table showing the HEC-RAS cross-section flow change locations and the corresponding
EC -HMS junction name shall be provided. The peak flow shall be the same in both
models. In the case that a creek or channel runs through a subbasin in a hydrologic
model (see an example attached below), the additional outflow from the subbasin shall
be proportionally inserted in one of the following two methods: (Method 1) at 1/3 or at
2/3 of the channel segment within the subbasin, or (Method 2) approximately at middle
of the channel segment (Figure 1).
ATTACHMENT "A"
Page 13 of 19
Figure 'i. Flow Change i_®canons
If the ENGINEER determines that either procedure will not accurately represent the
additional flow between hydrologic analysis points, the ENGINEER shall inform and
discuss with the City's Project Manager flow change locations.
c. Results
If data is available, model results shall be compared with recorded stage levels or
checked against known high water marks. The model results shall also be compared to
known flooding events. If significant differences are found, adjustments to the hydraulic
model may be required.
The ENGINEER shall document all methodologies and assumptions, software used,
data sources, problem areas, and significant changes in water surface elevations
between the old and new hydraulic models.
The ENGINEER will eliminate crossing profiles; however, given the number of profiles
(for existing and future conditions) and the potential for minimal differences in computed
flow rates, it is possible that some minor crossing of profiles cannot be resolved. The
ENGINEER will coordinate these issues with the City staff.
The ENGINEER shall produce an updated or new floodway data table. The lettered
section should correspond with the locations of the effective study,
ATTACHMENT "A"
Page 14 of 19
The ENGINEER will produce water surface elevation profile plots for the 10-, 50-, 100-,
and 500-year flood frequencies using FEMA RASPLOT 2.5 or later. The ENGINEER
shall reference the existing Flood Insurance Study profile plots for plot scale.
The ENGINEER shall delineate the floodway and the 100- and 500-yr floodplains
through the study area. If applicable, the 100-yr floodplain for ultimate conditions will
also be delineated. The ENGINEER shall produce work maps that show the following
minimum information in and near the floodplains: (1) Cultural features, such as
railroads, airfields, streets, roads, public schools, highways, levees, dikes, dams and
other flood -control structures, and other prominent man-made features and landmarks;
(2) Hydrographic features, such as rivers, streams, lakes and ponds, and channels
(including both banks of a stream when graphically possible); (3) Corporate limits,
extraterritorial jurisdiction limits, and boundaries of excluded areas; (4) Elevation
reference marks (ERM), and (5) Grid lines (State Plane North Central Texas Survey
Feet) with appropriate values annotated.
Base Flood Elevations (BFEs) will be generated and shown by wavy line contours
drawn normal to the direction of the flow of water, perpendicular to the floodplain, but
not necessarily perpendicular to the stream centerline. They shall extend completely
across the existing conditions 100-year floodplain. Each BFE notation shall indicate its
elevation (NAVD88) to the nearest whole foot.
��NGIN��F�: ,odd to task project unique activities particular to study that are beyond
the standard scope.]
Task 4 Deliverables:
® Documentation
o A summary of the Task and a description of methodologies and
assumptions used. The detailed summary shall include design criteria,
software used, source data, cross -sections, modeling considerations, and
any special technical issues and resolutions.
o A summary of results and a comparison with effective water surface
elevations. Include floodplain and floodway delineations and BFEs. One
set of hard copies of the floodplain maps, separated by existing and future
land use conditions, preferably printed in the format of DFIRM panels.
o Any relevant correspondences, discussions, and technical decisions
regarding model development including review comments and special
issues.
• Digital Data
o Hydraulic Model: One digital copy of the final, working, geo-referenced,
and fully -annotated HEC-RAS hydraulic model that provides peak flow
rates for the 2-, 5-, 10-, 25-, 50-, 100-, and 500-year floods together with
all supportive GIS and modeling data for the RAS models (current non -
beta HEC-RAS version at time of delivery).
o GIS Data: Supportive GIS and modeling data including the stream
centerline, cross -sections, floodplain delineations, and BFE's. (if
ATTACHMENT "A"
Page 15 of 19
applicable) An ArcGIS 9.2 or later version of a personal geodatabase
containing all final vector information developed under this task.
o Support: Electronic versions of all information gathered, supporting
materials and data in developing the hydraulic models, and work products
created in this task, such that the models can essentially be duplicated
with the backup data. PDF format files of the floodplain maps, separated
by existing and ultimate land use conditions, preferably in the format of
DFIRM panels. PDF format files and DWG files of the RASPLOT profiles.
• The ENGINEER shall submit two sets of DVDs containing electronic versions of
all information gathered and work products created in this task such that the
models and floodplain maps can essentially be duplicated.
Task 5: Watershed Flood Hazard Assessment
The ENGINEER shall assess the capacity of stream roadway crossings and summarize
flooding hazards at the stream roadway crossings. The ENGINEER shall provide an
estimate of the number of roadway crossings inundated and depth of inundation for
each return event analyzed. The ENGINEER shall document the results from the
watershed flood hazard assessment.
�ENG/NEER: Add to task project unique activities particular to study that are beyond
the standard scope.]
Task 5 Deliverables:
• Documentation
o A summary of the flood hazards within the watershed including all of the
stream roadway crossings with general address, description of roadway
crossing, roadway crest elevation, reach, HEC-RAS river station, and
depth of flooding for the existing and fully developed storms.
• Digital Data
o (If applicable) An ArcGIS 9.2 personal geodatabase containing all final
vector information developed under this task.
Task 6: Proposed Flood Mitigation Alternative Analysis
The ENGINEER shall assess the conditions of the study area and revise or develop a
master plan of proposed improvements and flood hazard mitigation. Alternatives to be
considered will include but are not Olimited to open channel improvements, detention,
and property buy-outs and building/house removal. This task will consider flooding
issues identified in Task 5 to determine the potential flood reduction benefits of flood
mitigation. The ENGINEER shall determine appropriate acquisition data based on
current available appraisal district data. [ENGINEER to estimate the number and type
of alternatives to be included in the analysis in conjunction with City staff.]
ATTACHMENT "A"
Page 16 of 19
r
The ENGINEER shall develop and discuss realistic preliminary alternatives with the
City's Project Manager prior to analysis. The ENGINEER shall then evaluate the
preliminary alternatives discussed and make necessary revisions. The ENGINEER
shall discuss the revised alternatives with the City's Project Manager before finalizing
the conceptual mitigation alternatives. The alternatives may be finalized prior to the
public meeting discussed in Task 1. City utility crossing potential conflicts shall be
considered and identified in the development of the alternatives.
The ENGINEER shall document all methodologies and assumptions used to analyze
the conceptual flood mitigation alternatives and significant changes in water surface
elevation between the existing conditions model and the improvement alternatives
model. Any modifications to the hydrologic features developed for Task 3 as a result of
the improvements shall be discussed with the City's Project Manager. The ENGINEER
shall rerun routing for the alternatives.
A benefit cost analysis (BCA) shall be conducted using the FEMA Mitigation BCA
Toolkit Version 3.0 (July 2006). The ENGINEER shall use a discount rate of 7% and a
project life of 50 years. The ENGINEER will evaluate the BCA based on the storm
events outlined in Table 1 and the potential damages to residential, commercial, and
industrial structures. The benefit cost analysis may be used to prioritize the mitigation
alternatives. The conceptual opinions of probable cost shall include a contingency cost
A thirty (30) percent and engineering and surveying cost of ten (10) percent.
�ENG/NEER: Add to task project unique activities particular to study that are beyond
the standard scope.]
Task 6 ®eliverables:
• Documentation
o A summary of the Task and a description of methodologies and
assumptions used. The detailed summary shall include design criteria,
software used, source data, cross -sections, modeling considerations, and
any special technical issues and resolutions.
o A summary of results and a comparison with existing water surface
elevations from Task 4.
o Any relevant correspondences, discussions, and technical decisions
regarding model development including review comments and special
issues.
• Digital Data
o Hydrologic Model: (if applicable) One digital copy of the final, working, and
fully -annotated HEC-HMS hydrologic model (if different from Task 3) that
provides peak flow rates for the 2-, 5-1 10-1 25-1 50-, 100-, and 500-year
floods together with all supportive GIS and modeling data (including DSS
files) for the HEC-HMS models (current non -beta HEC-HMS version at
time of delivery)
ATTACHMENT "A"
Page 17 of 19
o Hydraulic Model: One digital copy of the final, working, geo-referenced,
and fully -annotated HEC-RAS hydrologic model that provides peak flow
rates for the 2-, 5-, 10-1 25-1 50-, 100-, and 500-year floods together with
all supportive GIS and modeling data for the RAS models (current non -
beta HEC-RAS version at time of delivery).
o GIS Data: Supportive GIS and modeling data including the stream
centerline, cross -sections, floodplain delineations, and proposed
conceptual alternatives. (If applicable) An ArcGIS 9.2 or later version of a
personal geodatabase containing all final vector information developed
under this task.
o Support: Electronic versions of all information gathered, supporting
materials and data in developing the hydraulic models, and work products
created in this task, such that the models can essentially be duplicated
with the backup data. PDF format files of the floodplain maps preferably in
the format of DFIRM panels.
• The ENGINEER shall submit two sets of DVDs containing electronic versions of
all information gathered and work products created in this task such that the
models and floodplain maps can essentially be duplicated.
Task 7: Quality Assurance and Quality Control Procedures
The ENGINEER shall develop a QA/QC procedure meeting or exceeding the
requirements of FEMA for FEMA Digital Floodplain Insurance Rate Mapping projects.
The QA/QC program shall include a multi -level approach to ensure that senior members
of ENGINEER's staff review, comment, and approve the completed work. Quality
control check lists shall be created for the survey, hydrology, hydraulics, and mapping
elements of the work. Each checklist shall include milestone review events that
describe the items to be reviewed and include documentation of the comments by the
reviewer and responses from the ENGINEER's Project Manager. All project materials
presented to the City as draft or final products must be accompanied by QA/QC
certification or they will be rejected by the City. Work on a task shall not proceed until
the milestone event has been reviewed and all necessary revisions to the data are
complete. The checklists shall be signed. by the senior task leader, Project Manager,
and the Principal, and are included in the FINAL REPORT. The ENGINEER shall
provide copies of their QA/QC efforts to the City of Fort Worth.
The ENGINEER shall retain all work products generated and information gathered and
used during the course of the project. This includes, but is not limited to, base data
such as City of Fort Worth's base terrain data) as well as intermediate work products
(e.g. the fill grid used in the hydrologic preprocessor, draft reports, etc.). These items
shall be transmitted to the City of Fort Worth Project Manager by the end of the project.
Task 7 Deliverables:
• Documentation
ATTACHMENT "A"
Page 18 of 19
o Upon completion of the project, the ENGINEER shall submit signed digital
and hard copies of the QA/QC checklists.
Task On Letter of Map Revision Application and Support
The ENGINEER shall prepare a LOMR application package with complete supporting
documentation. Following the City 's review and approval, the ENGINEER shall
represent the City to submit the LOMR application to FEMA. The ENGINEER will
provide the City two copies of the final LOMR application package. The City will be
responsible for the payment of FEMA's LOMR review and processing fees. The LOMR
application typically includes the following forms although others may be required for the
floodplain restudy:
Form 1 Overview &Occurrence
Form 2 Riverine Hydrology and Hydraulics Form
Form 3 Riverine Structures Form
The ENGINEER shall respond to comments made by FEMA on the LOMR application
package. Based on the comments received, the ENGINEER shall make necessary
revisions to the LOMR submittal package and address all comments and provide
additional required information to fulfill FEMA requirements for issuance of a of the
FEMA LOMR for this study, if applicable.
Task 8 Deliverables:
• Documentation
o Two copies of the completed LOMR application package.
• Digital Data
o Digital copy of the completed LOMR application package
The project (excluding FEMA review of LOMR if required) should be completed within
twelve months after receiving the Notice to Proceed letter from the City. The
ENGINEER has attached a schedule of tasks within a time frame of 12 months.
ATTACHMENT "A"
Page 19 of 19
EXHIBIT "A-1"
(SUPPLEMENT TO ATTACHMENT A)
STUDY NO. SWS-009
SOFTWARE AND DATA FILE STANDARDS
The following standards and specifications for hardware, software, file structure,
and data format are specified for consistent data management and model
development. Any other hardware, software, file structure, and data formats
must be compatible with the applications currently used by the City and require
the approval of the City.
Software:
Operating System: Microsoft Windows XP Professional SP2 (32-bit) or
later version
Office Productivity: Microsoft Office 2003 or later
Document Imaging: Adobe Acrobat 7.0 or later
GIS Packages: ESRI ArcGIS Desktop 9.2 or later
GIS Extensions: Spatial Analyst, 3D Analyst
Hydrologic Model GIS Preprocessor: HEC-GeoHMS 1
Hydraulic Model GIS Preprocessor: HEC-GeoRAS 4.1
Hydrologic Model: HEC-HMS 3.0.1 or later
Hydraulic Model: HEC-RAS 3.1.3 or later
.1
or
or later
later
FEMA Preparation Software: CHECK-RAS 1.4, RASPLOT 2.5 or later
Others if specified, must be agreed upon by the City
Data File Formats:
Reports: Reports will be provided in Microsoft Word 2003 format or later,
with all images, maps, graphs, tables, etc. embedded in the document so
that an exact duplicate_ of hard copy reports can easily be created. Also, a
duplicate PDF version of the report shall be created for archival purposes.
Graphs and Tables: Tabular information will be provided in Excel 2003
format (or later) and in Access 2003 database format (or later) when a
small database is required. If an enterprise database is deemed
necessary, Oracle 91 or later shall be used.
ASCII Text Files: All ASCII text files (other than model inputs and
outputs) will be encoded using ANSI -encoding and will have the file
extension ".TXT". Text files containing comma -delimited information will
have the file extension ".CSV".
Digital Photographs: All photographs taken for the project will be in
digital form, at least 1600 X 1200 resolution, full color, and saved in the
JPG file format. Dates and times will be saved in the image, and file
EXHIBIT "A-1"
Page 1 of 3
names will be descriptive (i.e. WMS_XS_20343_US.JPG, not
IMG014.JPG). Photos of the channel or cross -sections shall be labeled
as to direction of flow.
Scanned Documents: Scanned documents will be .provided in Adobe
PDF format, with the entire document appearing in a single file (not
individual PDFs for individual pages or for chapters). Bookmarks to
chapter beginnings and other important pages will be provided in the PDF.
GlS Spatial Data File Formats:
All GIS vector data layers (points, lines, polygons, etc.) shall be provided
in one of the following three ArcGIS compatible formats: personal or
file geodatabase (preferred), shapefile, or coverage. Continuous surface
model data (i.e. DEMs or DTMs) shall be in ESRI's GRID or TIN format.
The City will provide the elevation data for each study area plus a 500 foot
buffer in the LIDAR LAS binary file format. Aerial photography or other
raster imagery will be provided in a common GIS image format (preferably
GeoTIFF), with appropriate header information and a world file for
georeferencing. If large amounts of raster images are required for the
project, and image catalog will be created and provided to the city.
All GIS data, and other files containing coordinates, shall use the State
Plane coordinate system set to the Texas North Central (4202) zone. The
horizontal datum shall be the North American Datum of 1983 (NAD83) and
the vertical datum shall be the North American Vertical Datum of 1988
(NAVD88)3 both the horizontal and vertical units shall be in feet. All
surveyed data shall be captured or converted to grid coordinates. If
conversion is required, the surface to grid conversion factor shall also be
provided. All GIS datasets shall have the projection defined either
internally (geodatabases) or with a projection file (shapefiles).
A FGDC compliant metadata file shall be provided for each GIS dataset.
This metadata will be compatible with ArcCatalog and saved in XML
format.
Data accuracy shall be reported and checked using NSSDA standards
instead of other older standards like WAS or ASPRS.
All submitted data files must not contain any server link references to the
server network and file folders.
File Structure and File Names:
All files created in this project will be descriptively named, within the limits
of the software. Underscores will be used in place of spaces in file
names. File structure should look like the following:
EXHIBIT "A-1"
Page 2 of 3
02_5urvey
I;t�)
Field Notes
ILD
Photos
lin
Spatial_Data
Text_Files
E i�:D
03_Models
In
Hydraulic_ Models
ILD
Hydrology_Models
iy�
04_5patial_Data
Hydraulic
Hydrology
05_Profiles
06_Fiood
Maps
EXHIBIT "A-1"
Page 3 of 3
EXHIBIT "A-2"
(SUPPLEMENT TO ATTACHMENT A)
STUDY NO. SWS-009
OPEN CHANNEL STUDY REPORT FORMAT
Table of Contents
Task 1: Project Management
• Summary of Tasks
• Support Data
• Project Certification and Decision Log.
Task 2: Data Search, Collection, Field Reconnaissance, Stream Conditions
Assessment, and Surveys
• Data Search and Collection
o Methods
o Hot Spots
o Data Sources
o LOMC
• Field Reconnaissance
o Methodology
o Special Physical Characteristics
• Stream Conditions Assessment
o Methodology
o Identified Areas of Concern
• Surveys
o Control
o Field Survey Methodology
o Finished Floor Elevations
Task 3: Development of Detailed Hydrologic Models
• Task Summary
o Introduction
o . Performance Work Statement
o LOMC Incorporation
• Methodology
o Detailed Summary
■ Summary of Methodology
■ Design Criteria
■ Software
o Drainage Basin Delineation
EXHIBIT "A-2"
Page 1 of 5
■ Topographic Data
■ Delineation Method
o Collected Data
■ Precipitation
■ Structure Outflow, Elevation, Storage Curves
o Modeling Considerations
■ Drainage Area Parameters
■ Soil Types and Land -use
■ Runoff Losses
■ Time of Concentration
■ Unit Hydrograph
■ Channel Routing
• Result and Conclusions
o Summary of Results
o Comparison of Effective Discharges with Study Discharges
Task 4: Development of Hydraulic Models and Floodplain Maps
• Task Summary
o Introduction
o Performance Work Statement
o LOMC Incorporation
• Methodology
o Detailed Summary
■ Summary of Methodology
■ Design Criteria
■ Software
o Cross -Sections
■ Locations and Layout Considerations
■ Method to Obtain Cross -Sections
■ Bridges, Culverts, and Road Crossings
o Modeling Considerations
■ Starting Water Surface Elevation
■ Structure and Road Crossing Modeling
■ Islands and Split Flows
■ Ineffective Flow Areas
■ Calibration
■ Floodway
■ Special Problems
• Results and Conclusions
o Floodplain Delineation and Mapping
■ Method of Delineation
■ Base Flood Elevations Results
o Summary of Results
o Comparison of Existing WSELs with Study WSELs
EXHIBIT "A-2"
Page 2 of 5
Task OR Watershed Flood Hazard Assessment
• Task Summary
• Findings
Task 6: Proposed Flood Mitigation Alternative Analysis
• Task Summary
o Introduction
o Performance Work Statement
• Methodology
o Detailed Summary
Summary of Methodology
■ Design Criteria
■ Software
o Cross -Sections
■ Locations and Layout Considerations
■ Method to Obtain Cross -Sections
■ Bridges, Culverts, and Road Crossings
o Modeling Considerations
■ Starting Water Surface Elevation
■ Structure and Road Crossing Modeling
■ Islands and Split Flows
■ Ineffective Flow Areas
■ Calibration
■ Floodway
■ Special Problems
• Results and Conclusions
o Floodplain Delineation and Mapping
o Summary of Results
o Comparison of Existing WSELs with, Study WSELs
Task 7: Quality Assurance and Quality Control Procedures
• Task Summary
• QA/QC Procedure
o Task 1
o Task 2
o Task 3
o Task 4
o Task 5
o Task 6
o Task 8
• City Notification
Task 8: Letter of Map Revision Application and Support
• Task Summary
• Application Forms
EXHIBIT "A-2"
Page 3 of 5
APPENDICES
APPENDIX A -Figures
• Task 2 — Figures
o Stream Condition Assessment Photos
o Stream Condition Assessment Locations
o Control Points
o Surveyed Structures and Cross -sections
o Surveyed Finished Floor Elevations
• Task 3 —Figures
o Overall Study Area
o Drainage Area Map
o Hydrologic Soils Map
o Land-Use/Zoning Map
o Longest Flow Paths and Time of Concentrations
o Peak Discharge Vs. Drainage Area
• Task 4 — Figures
o Overall Study Area
o Floodplain Maps
o Profiles
• Task 5 — Figures
o Crossings
• Task 6 — Figures
o Overall Study Area
o Floodplain Maps
o Profiles
APPENDIX B —Supporting Documents
• Task 1 —Supporting Documents
• Task 2 — Supporting Documents
o GPS Survey Documentation
• Task 3 —Supporting Documents
o Land -use Classifications
o Composite Curve Number Calculations
o Lag Time Calculations
o Routing Parameters
o Curves
o Results
• Task 4 —Supporting Documents
o As -Built plans
o Summary of Discharges
o Floodway Data Table
o Results
• Task 5 —Supporting Documents
o Table of crossings inundated per study storms
EXHIBIT "A-2"
Page 4 of 5
• Task 6 — Supporting Documents
o As -Built plans
o Summary of Discharges
o Floodway Data Table
o Results
• Task 8 —Supporting Documents
o Completed LOMR application package (if applicable, however, may be
submitted at a later date.)
• PDF of final report
APPENDIX C — QA/QC
• Task 2 — QA/QC Forms
• Task 3 — QA/QC Forms
• Task 4 — QA/QC Forms
• Task 5 — QA/QC Forms
APPENDIX D —Digital Data
• Task 2 — Digital Supporting Data
o Stream Conditions Assessment Data
o Survey Data
o Spatial Data
o Figures
• Task 3 — Digital Supporting Data
o Hydrologic Models
o Spatial Data
o Figures
• Task 4 — Digital Supporting Data
o Hydraulic Models
o Spatial Data
o Figures and Maps
• Task 5 — Digital Supporting Data
o Figures and Maps
o Spatial Data
o Support Data
• Task 6 — Digital Supporting Data
o Hydraulic Models
o Spatial Data
o Figures and Maps
• Task 8 — Digital Supporting Data
o Completed LOMR application package (if applicable, however,
may
EXHIBIT "A-2"
Page 5 of 5
ATTACHMENT "B"
LOWER MARY'S CREEK OPEN CHANNEL STUDY
STUDY NO. SWS-009
COMPENSATION AND PAYMENT SCHEDULE
A. The Engineer shall be compensated a total lump sum project fee of $243,046.
Payment of the total lump sum fee shall be considered full compensation for the
services described in Attachment "A" and Attachment "C-1" for all labor
materials, supplies and equipment necessary to complete the project.
B. The Engineer shall be paid in accordance with "Exhibit B-1 ", Supplement to
Attachment B. Each invoice from the Engineer shall be verified as to its accuracy
and compliance with the terms of this contract by an officer of the Engineer.
C. Additional tasks assigned by the CITY not included in Attachment "A" or
Attachment "C-1" Scope of Services will be billed on an hourly basis. These
tasks will not be performed without written authorization from the CITY. A
summary of current hourly billing rates is provided in Exhibit "13-2".
D. Professional Services Fee summary is provided in Exhibit 99B-3"
E. A Summary of Total Project Fees including MWBE participation percentages is
provided in Exhibit "B-3A".
F. A schedule of partial submittals for review will be based on the Project Schedule
Attachment and is as follows:
Project Phase
Hydrologic Study Phase
Estimated Completion Date
June 2009
September 2009
December 2009
February 2010
ATTACHMENT "B"
Page 1 of 1
a
EXHIBIT "B-1"
(SUPPLEMENT TO ATTACHMENT B)
LOWER MARY'S CREEK OPEN CHANNEL STUDY
STUDY NO. SWS-009
METHOD OF PAYMENT
PROGRESS REPORT REQUIREMENTS
I. Method of Payment
Partial payment shall be made to the Engineer monthly based on a percentage of
work performed upon City's approval of an invoice from the Engineer outlining the
current labor and expenses of the total project. The aggregate of such monthly
partial fee payments shall not exceed the following:
Project Phase
Hydrologic Study Phase
Hydraulic Study Phase
Preliminary Report
Final Report
Estimated Proiect Percent Complete
30%
75%
90%
100%
The balance of fees, less previous payments, shall be payable after delivery of the
FINAL report and electronic files.
II. Progress Reports
A. The Engineer shall submit to the designated representative of the Director of
the Department of Transportation/Public Works monthly progress reports
covering all phases of the analysis in the format required by the City.
B. Periodic reports concerning MWBE participation shall be submitted as required
by the MWBE Office.
EXHIBIT "B-1"
Page 1 of 1
EXHIBIT "B-2"
(SUPPLEMENT TO ATTACHMENT B)
LOWER MARY'S CREEK OPEN CHANNEL STUDY
STUDY NO. SWS-009
HOURLY RATE SHEDULES
A summary of current hourly billing rates is provided below:
Principal -in -Charge $200 — $380
Project Manager $110 — $260
Senior Professional Engineer $150 — $260
Junior Professional Engineer $110 — $160
Engineer -in -Training $85 — $130
Sr. GIS $85 — $130
Jr. GIS $50 — $100
Engineering Intern $30 — $65
CADD Technician $35 — $110
Clerical $55 — $130
EXHIBIT "B-2"
Page 1 of 1
EXHIBIT "B-3"
(SUPPLEMENT TO ATTACHMENT B)
LOWER MARY'S CREEK OPEN CHANNEL STUDY
STUDY NO. SWS-009
PROFESSIONAL SERVICES FEE SUMMARY
TASK
FEE
Task 1: Project Management
$29,368
Task 2: Data Search, Collection, Field
Reconnaissance
$5,941
Task 2: Stream Condition Assessment
$24,231
Task 2: Field Surveys of Hydraulic Structures
$36,225
Task 2: Finished Floor Elevations
N/A
Task 3: Development of Detailed Hydrologic Models
$29,648
Alternate A: Sn der's Methodology
Task 3: Development of Detailed Hydrologic Models
$183115
Alternate B: SCS Methodology
Task 4: Development of Hydraulic Models and
$30,048
Flood lain Maps
Task 5: Watershed Flood Hazard Assessment
$2,365
Task 6: Proposed Flood Mitigation Alternative
$28,344
Analysis
Task 7: Quality Assurance and Quality Control
$16,534
Procedures
Task 8: Letter of Map Revision Application and
$22,227
Support (if required)
SERVICE TOTAL
$243,046
EXHIBIT "B-3"
Page 1 of 1
EXHIBIT "B-3A"
(SUPPLEMENT TO ATTACHMENT B)
LOWER MARY'S CREEK OPEN CHANNEL STUDY
STUDY NO. SWS-009
SUMMARY OF TOTAL PROJECT FEES
Consulting Firm Prime Responsibility Amount Percent
PRIME ENGINEER:
Freese and Nichols, Inc.
SUB ENGINEER:
Gorrondona
Vieux, Inc
Engineering and Project Mgmt.
Field Survey
Hydrologic Model Calibration
$205,546 84.5%
$31,500 13.0%
$61000 2.5%
SUB ENGINEER. shall participate in performing portions of the following Tasks as
outlined in Attachment "C-1 ":
Project Description Scope of Services Total Fee MWBE Fee Percent
Engineering Services Open Channel Study $243,046 $31,500 13.0%
Non-MWBE Participation Scope of Services Total Fee Percent
Vieux, Inc
Hydrologic Model Calibration
$6,000 2.5%
EXHIBIT "B-3A"
Page 1 of 1
ATTACHMENT "C"
LOWER MARY'S CREEK OPEN CHANNEL STUDY
STUDY NO. SWS-009
AMENDMENTS TO STANDARD AGREEMENT FOR ENGINEERING SERVICES
ATTACHMENT "C"
Page 1 of 1
ATTACHMENT "C-1"
LOWER MARY'S CREEK OPEN CHANNEL STUDY
STUDY NO. SWS-009
AMENDMENTS TO THE STANDARD SCOPE OF SERVICES, ATTACHMENT "A"
Task 1: Proiect Management
The ENGINEER shall attend a maximum total of six (6) meetings with CITY's Project
Manager, CITY staff or the public.
Comprehensive report development for the project will be included in Task 1. Report
development will include description of methodology, results and recommendations for
each Task to include: Data Collection and Stream Condition Assessment (Task 2),
Hydrology (Task 3), Hydraulics (Task 4), Watershed Flood Hazard Assessment (Task 5)
and Proposed Flood Mitigation Alternative Analysis (Task 6).
Task 2• Data Search, Collection, Field Reconnaissance, Stream Condition
Assessment, and Surveys
c. Stream Condition Assessment
ENGINEER will perform a stream geomorphology evaluation to identify existing and
potential erosion areas and to propose channel stabilization alternatives.
Task 1 —Site Visit
A stream assessment will be conducted to evaluate the current condition of the creek.
This will be achieved by conducting a geomorphic assessment of the channel at 200
foot intervals. During the stream assessment the sediment source and discharge areas
will be located as well as all hard points within the creek. The field survey will include a
visual summary of channel conditions by river reach (photographs of the left and right
bed and bank and upstream and downstream). The bed and bank material will be
sampled for sieve analysis. The geology of the reach will be noted considering the rock
type, degree of weathering, and thickness of the alluvial soils. Bank stability and degree
of erosion will be noted, as well as the distance to and type of structure that may be
impacted. Channel dimensions will be measured with a survey rod and laser to
determine bank geometry. All locations will be marked with GPS receiver employing
sub -meter accuracy. Preparation for the field is also included in this task.
Task 2 —Preliminary Evaluation
Preparation for the channel stability assessment report will include desk top analysis of
the soils, landuse, channel and landscape, and geology. A field assessment overview
will include the bed and bank material evaluation and calculation, equilibrium slope
calculation, reach survey channel geometry calculations and reach structure and
distance from channel. For stream assessment calculations, the design or dominant
flows from the models will be obtained from the modeling component of this project.
ATTACHMENT "C-1"
Page 1 of 3
Evaluation will include a summary of the study area, channel stability assessment
methodology, and field assessment methodology. There will be a field assessment
overview describing the geology and soils, bed material evaluation, equilibrium slope,
and meander migration potential. The field survey results will include the reach survey
data, the reach survey channel erosion, the reach survey channel geometry, and
possible reach survey structure and distance from channel. Deliverables will also
include labeled digital photos and locations of special physical characteristics that may
be relevant to modeling and locations of observed areas of concern in addition to
comments on the present conditions.
d. Field Surveys
For the Marys Creek Open Channel study there are approximately 18 open channel
cross -sections and approximately 6 hydraulic structures to be surveyed. Hydraulic
structures to be surveyed include the Channel Dam downstream of SH 183, the SH 183
Bridge, the Country Club Drive Bridge, the Railroad Bridge, Winscott-Vickery Blvd
Bridge, and US Hwy 377.
e. Finished Floor Elevations
Finished floor surveys will not be acquired as part of the Basic Services for this project.
The ENGINEER shall review channel improvement recommendations made in the
USACE (1993) Study, Section 205 Reconnaissance Report Marys Creek Fort Worth
and Benbrook.
Task 3: Development of Detailed Hydrologic Models
c. Model Development
Hydrology
Based on the existing FIS hydrologic model (SWFHYD):
• Create a HEC-HMS model for Marys Creek, maintaining the existing basin
outfalls. The model will use a computational time step of 15 minutes.
• Update basin parameters (area, lengths, slopes)
• Calibrate the hydrologic model using three recent storm events (June 2000, June
2004, March 2007). The USGS gage used for the calibration would be USGS
08047050 on Winscott Road, near the confluence with the Clear Fork Trinity
River.
• The rainfall used for calibration would be on the form of calibrated NEXKAU
precipitation.
• The Snyder's unit hydrograph methodology will be used to transform runoff to
discharges. Calibrated Cp and Ct values will be used in the model. This will be
representative of existing conditions.
• For the frequency runs, the curve number method will be used, assuming
ultimate conditions.
ATTACHMENT "C-1"
Page 2 of 3
• The rainfall values for the frequency runs will be updated with City of Fort Worth's
rainfall values.
• Updated estimates for the existing and ultimate conditions 2, 5, 10, 50, 100, and
500 year discharges on Marys Creek will be developed at the USGS gage and at
the confluence with the Clear Fork of the Trinity River.
• Create a concept -level fully developed conditions hydrologic model using input
data from 1993 USACE urbanized hydrology study.
• Estimate the flows on the Clear Fork of the Trinity River using the same
assumptions applied on Marys Creek.
• Fully developed flows will only be used to analyze the Marys Creek study reach
from the confluence with the Clear Fork Trinity River to the Winscott-Vickery
crossing.
Task 4• Development of Hydraulic Models and Floodplain Maps
a. Model Development
Hydraulics
• Develop an unsteady flow hydraulic model using HEC-RAS that will cover the
following area:
o On Marys Creek, between the Winscott-Vickery crossing and the
confluence with the Clear Fork Trinity River.
o On the Clear Fork Trinity River, between 1-20 and Bryant Irvin.
• The model will be based on surveyed cross sections and the latest 2400t
contours available. The confluence of Marys Creek with the Clear Fork Trinity
River will be modeled in a way such that the available storage on the Clear Fork
is used.
• This model will be used to delineate the 100 year floodplain and floodway for the
area below the Winscott-Vickery crossing.
• Redelineation will tie in to the effective FEMA floodplain upstream of the
Winscott-Vickery crossing and downstream of the Marys Creek/ Trinity River
confluence.
Task 6• Proposed Flood Mitigation Alternative Analysis (if required)
The ENGINEER will develop up to two (2) potential regional detention or channel
improvement alternatives.
ATTACHMENT "C-1"
Page 3 of 3
f �-
c. I � ��
M&C Review
Page 1 of 2
CITY COUNCIL AGENDA
COUNCIL ACTION: Approved on 9/22/2009
Official site of the City of Fort Worth, Texas
FoR� F_�
DATE: 9/22/2009 REFERENCE C-23796 LOG NAME: 20SWMMARYSCREEKPLAN
NO..
CODE: C TYPE: NON- PUBLIC NO
CONSENT HEARING:
SUBJECT: Authorize an Engineering Agreement with Freese &Nichols, Inc., in the Amount of
$243,046.00 for the Lower Mary's Creek Master Plan and Authorize an Interlocal
Agreement with the City of Benbrook to Share the Cost of the Engineering Agreement
RECOMMENDATION:
It is recommended that the City Council authorize the City Manager to:
1. Execute an Agreement with Freese &Nichols, Inc., in the amount of $243,046.00 for the Lower
Mary's Creek Master Plan; and
2. Execute an Interlocal Agreement with the City of Benbrook under which Benbrook will participate in
an amount up to $63,569.00 ($52,456.00 for basic study tasks and $11,113.00 for optional additional
work) for its share of the cost of the Engineering Agreement.
DISCUSSION:
In order to manage stream flooding, detailed open channel studies are required to determine runoff
rates and flow depth, to verify and correct Federal Emergency Management Agency (FEMA) Flood
Insurance Rate Maps and to develop a master plan for each stream consisting of channel
improvements, detention and other measures which can remove buildings from the floodplain and
make roadway crossings safer.
In November 2007, a request for qualifications was advertised for open channel studies. Twenty-
three statements of qualifications were received and Freese &Nichols, Inc., was selected to prepare
the Lower Mary's Creek Master Plan, Storm Water Study SWS-009, in order to address roadway,
home and business flooding along this creek.
A review of new FEMA maps indicates that Mary's Creek appears to have an incorrect floodplain
shown at its confluence with the Clear Fork Trinity River, putting numerous houses in the floodplain in
Ridglea Country Club Estates in Fort Worth and Benbrook. The basic scope of work will include a re-
study of Mary's Creek in this vicinity to correct the FEMA map and reviewing and updating a previous
Corps of Engineer study which recommended various channel improvements to reduce flooding.
Optional work, if agreed to by both cities, will include preparing documents to obtain a FEMA Letter of
Map Revision. Freese &Nichols, Inc., proposes to perform this study for slump -sum fee of
$243,046.00. City staff considers this fee to be fair and reasonable for the scope of services
proposed, based on the size of the watershed and length of the stream.
The City of Benbrook has agreed to participate in study costs through an Interlocal Agreement.
Based on the work being performed with the City of Benbrook, it was determined that Benbrook's pro-
rata share is $52,456.00 for the basic study tasks and $11,113.00 for the optional additional work, for
a total maximum participation by the City of Benbrook of $63,569.00. The Storm Water Utility Fund
will be used to fund Fort Worth's portion of this study.
Freese 8 Nichols, Inc., is in compliance with the City's M/WBE Ordinance by committing to 13
percent M/WBE participation. The City's goal for this project is 13 percent.
This project is located in COUNCIL DISTRICT 3 and in the City of Benbrook.
httn•//annc nfwnPt nro/
M&C Review
Page 2 of 2
FISCAL INFORMATION/CERTIFICATION:
The Financial Management Services Director certifies that, funds are available in the current
operating budget, as appropriated, of the Storm Water Utility Fund.
TO Fund/Account/Centers
Submitted for City Manager's Office by;
Originating Department Head:
Additional Information Contact:
ATTACHMENTS
SWS-009 Mar r�s Creek Map.pdf
FROM Fund/Account/Centers
1 �PE69 531200 0209202 $179,477.00
Fernando Costa (6122)
William Verkest (7801)
Greg Simmons (7862)