R2006-046 04-10-06
RESOLUTION NO. R2006-46
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF PEARLAND,
TEXAS, AUTHORIZING THE CITY MANAGER OR HIS DESIGNEE TO
ENTER INTO A CONTRACT WITH KLOTZ AND ASSOCIATES FOR
ENGINEERING SERVICES (HYDRAULIC DESIGN) ASSOCIATED WITH
THE BAILEY/OILER ROAD PROJECT.
BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF PEARLAND, TEXAS:
Section 1. That certain contract by and between the City of Pearland and Klotz
and Associates, a copy of which is attached hereto as Exhibit "A" and made a part hereof
for all purposes, is hereby authorized and approved.
Section 2. That the City Manager or his designee is hereby authorized to execute
and the City Secretary to attest a contract with Klotz and Associates, for engineering
services associated with the Bailey/Oiler Road Project.
PASSED, APPROVED and ADOPTED this the 10th day on AD., 2006.
~~ W
TOM REID
MAYOR
APPROVED AS TO FORM:
CL. It. (iC
DARRIN M. COKER
CITY ATTORNEY
Resolution 200646
CITY OF PEARLAND
STANDARD AGREEMENT
FOR ENGINEERING SERVICES
I
T'
t' "1
This Contract (Contract) is made between the City of Pearland, Texas
/1
(hereinafter "City"), and Klotz Associates, Inc. (hereinafter "Engineer") as follows:
1. Summary of Contract Terms. The following information and referenced docJments '(1'
shall be a part of this Contract:
(5),,'::-
Description of Project: Provide Hydrologic and Hydraulic Study and Hydraulic
Design for Cowart Creek for the Bailey/Oiler Road Improvement Project.
En ineer/Subconsultant s
Klotz Associates, Inc.
Fee
$38,200.00
Maximum Contract Amount $38,200.00 Lump Sum
* All financial obligations created by this agreement are between the City and
Engineer, and shall not be construed to be between City and any subconsultant.
Delivery of plans, specifications and estimates: Sixty (60) days from completion
of project
Attachments: Scope of Services - Exhibit A
2. Services and Payment.
Engineer shall perform services within the Standard of Care of the Engineering
profession as follows:
A. Engineer will furnish services to the City in accordance with the terms and
conditions specified in this Contract. Payment for the services of Engineer shall be due
and payable upon submission and approval of a statement for services to City.
Statements for services shall not be submitted more frequently than monthly.
After consultation with the City, the Engineer shall specify the basis of
compensation in the scope of work for the project. The Engineer shall provide adequate
detail of the basis of compensation so that the City can determine the reasonableness
of the fees and have the ability to make reasonable progress payments to the Engineer
based upon work completed at the payment intervals. The Engineer shall subcontract
for all subconsultants, subject to City approval, necessary to complete the scope of
work. The subconsultant's fees and administrative mark-up, if any, shall be included in
the scope of work. Unless otherwise agreed upon, the method of compensation shall
be one of the following methods:
1. Salary Cost Times Multiplier Plus Direct Nonsalary Expense ("Salary")
Compensation shall be based on 1) the direct salaries (including benefits)
of the Engineer's employees whose time is directly chargeable to the
project; 2) an agreed upon multiplier to compensate the Engineer for
overhead and profit; and 3) reimbursement for direct nonsalary
expenditures and subconsultant contracts as defined in the scope of work
for the project. The Engineer shall provide a proposal that includes the
total fees for the project, which shall not be exceeded without prior City
approval.
2. Per Diem ("Per Diem")
Compensation shall be based upon 1) an agreed upon lump sum per day
for specific services; and 2) reimbursement for direct nonsalary
expenditures and subconsultant contracts as defined in the scope of work
for the project. This method is best suited to expert witness work or other
short-term engagements involving intermittent services.
3. Cost Plus Fixed Fee ("Cost Plus")
Compensation shall be based upon 1) reimbursement of the actual costs
of all services and supplies related to the project and 2) an agreed upon
fixed fee (profit). The Engineer shall provide an estimate of the costs to
be reimbursed, but actual compensation shall be based upon invoices and
supporting documentation provided by the Engineer.
4. Lump Sum ("Lump")
Compensation shall be based upon an agreed lump sum payment for
completing the entire scope of work. This method is best suited to
investigations or studies and for basic services with limited scope and
complexity.
5. Percent of Construction ("Percent")
Compensation shall be based upon 1) the "Harris County Curve for
Engineering Compensation" for basic and construction phase services;
and 2) reimbursement for direct nonsalary expenditures and subconsultant
contracts as defined in the scope of work for the project. The Engineer
shall provide a proposal that includes the estimated construction cost of
the project and the total fees for the project. If the actual low bid for
construction is 20% above or below the estimate, the engineering fees are
subject to equitable adjustment by mutual agreement of the Engineer and
City.
2
If City fails to make any payment due Engineer for services and expenses within
thirty (30) days after receipt and approval of Engineer's statement for services therefore,
the amounts due Engineer will be increased at the rate of one percent (1 %) per month
from said thirtieth (30th) day, and, in addition, Engineer may, after giving seven (7) days'
written notice to City, suspend services under this Contract until Engineer has been paid
in full, all amounts due for services, expenses, and charges.
B. All the Engineer's working drawings, plans, and specifications, if required under
this Contract, shall be sufficiently accurate, detailed, and complete so that competitive
bids for the work can be obtained and the improvements constructed.
C. Approval of the Engineer's work by the City shall not release the Engineer, its
employees, agents, or consultants, from the responsibility and liability for the accuracy
and competency of their designs, working drawings, and specifications, or other
documents and services.
D. Subject to Article 8 herein or as otherwise agreed, the Engineer shall promptly
correct errors in the Engineer's work, including errors discovered after final payment,
without receiving additional compensation.
E. Prior to execution of this agreement, the Engineer shall have prepared a project
schedule identified as an attachment to this agreement. The Project Schedule shall be
submitted in digital and paper form, in the Microsoft Project for Windows format. The
Project Schedule shall contain a complete schedule so that the Engineer's scope of
services under this contract can be accomplished within the specified time and contract
cost. The Project Schedule will provide specific work sequence and definite review
times by the City and the Engineer of the work performed. If the review time should
take longer than shown on the project schedule, through no fault of the Engineer,
additional contract time may be authorized by the City through a supplemental
agreement, if requested by a timely written request from the Engineer and approved by
the City.
3. Term and Termination. This Contract term will begin upon execution and end sixty
days after issuance of the certification of completion of construction by the Engineer.
The City may terminate this Contract at any time during its term by giving written notice
to Engineer. The City shall pay the Engineer for all services rendered to the date of
termination.
4. Modifications. City without invalidating the Contract, may order changes within the
general scope of the work required by the Contract by altering, adding to and/or
deducting from the work to be performed. If any change under this clause causes an
increase or decrease in Engineer's cost of, or the time required for, the performance of
any part of the Services under the Contract, an equitable adjustment will be made by
mutual agreement and the Contract modified in writing accordingly.
3
5. Subcontracts. If, for any reason, at any time during the progress of providing
services, City determines that any subcontractor for Engineer is incompetent or
undesirable, City will notify Engineer accordingly and Engineer shall take immediate
corrective action, which may include cancellation of such subcontract. Subletting by
subcontractors shall be subject to the same regulations. Nothing contained in the
Contract shall create any contractual relation between any subcontractor and City.
6. Ownership of Documents. All drawings, report data, and other project information
developed in the execution of the services provided under this Contract shall be the
property of the City upon payment of Engineer's fees for services. Engineer may retain
copies for record purposes. Owner agrees such documents are not intended or
represented to be suitable for reuse by City or others. Any reuse by City or by those
who obtained said documents from City without written verification or adaptation by
Engineer will be at City's sole risk and without liability or legal exposure to Engineer, or
to Engineer's independent associates or consultants, and City shall indemnify and hold
harmless Engineer and Engineer's independent associates and consultants from all
claims, damages, losses, and expenses including attorneys' fees arising out of or
resulting therefrom. Any such verification or adaptation will entitle Engineer to further
reasonable compensation. Engineer may reuse all drawings, report data, and other
project information in the execution of the services provided under this Contract in
Engineer's other activities. Any reuse by Engineer will be at Engineer's sole risk and
without liability or legal exposure to City, and Engineer shall indemnify and hold
harmless City from all claims, damages, losses, and expenses including attorneys' fees
arising out of or resulting therefrom.
7. Insurance.
A. The Engineer shall procure and maintain for the duration of this Agreement,
insurance against claims for injuries to persons, damages to property, or any errors and
omissions relating to the performance of any work by the Engineer, its agents,
employees or subcontractors under this Agreement, as follows:
(1) Workers' Compensation as required by law.
(2) Professional Liability Insurance in an amount not less than $1,000,000 in
the aggregate.
(3) Comprehensive General Liability and Property Damage Insurance with
minimum limits of $1,000,000 for injury or death of anyone person,
$1,000,000 for each occurrence, and $1,000,000 for each occurrence of
damage to or destruction of property.
4
(4) Comprehensive Automobile and Truck Liability Insurance covering owned,
hired, and non-owned vehicles, with minimum limits of $1,000,000 for
injury or death of anyone person, $1,000,000 for each occurrence, and
$1,000,000 for property damage.
B. The Engineer shall include the City as an additional insured under the policies,
with the exception of the Professional Liability Insurance and Workers' Compensation.
Certificates of Insurance and endorsements shall be furnished to the City before work
commences. Each insurance policy shall be endorsed to state that coverage shall not
be suspended, voided, canceled, reduced in coverage or in limits except after thirty (30)
days prior written notice by certified mail, return receipt requested, has been given to
the City. Upon request, certified copies of all insurance policies shall be furnished to the
City.
8. Indemnitv. Engineer shall indemnify and hold the City, its officers, agents, and
employees, harmless from any claim, loss, damage, suit, and liability of every kind for
which Engineer is legally liable, including all expenses of litigation, court costs, and
attorney's fees, for injury to or death of any person, for damage to any property, or
errors in design, any of which are caused by the negligent act or omission of the
Engineer, his officers, employees, agents, or subcontractors under this Contract.
9. Assiqnment. Engineer shall not assign this Contract without the prior written
consent of the City.
10. Law Governinq and Venue. This Contract shall be governed by the law of the State
of Texas and no lawsuit shall be prosecuted on this Contract except in a court of
competent jurisdiction located in Brazoria County, Texas.
11. Entire Contract. This Contract represents the entire Contract between the City and
the Engineer and supersedes all prior negotiations, representations, or contracts, either
written or oral. This Contract may be amended only by written instrument signed by
both parties. Purchase orders issued under this Agreement shall contain a statement
nullifying additional terms and conditions on the reverse side of the purchase order and
referencing this Agreement.
12. Conflicts in Contract Documents. The above proVIsions shall govern over any
conflicting provision contained in any referenced contract document specified above.
13. Dispute Resolution Procedures. The Engineer and City desire an expeditious
means to resolve any disputes that may arise between them regarding this Contract. To
accomplish this, the parties agree to mediation as follows: If a dispute arises out of or
relates to this Contract, or the breach thereof, and if the dispute cannot be settled
through negotiation, then the parties agree first to try in good faith, and before bringing
any legal action, to settle the dispute by mediation of a third party who will be selected
by agreement of the parties.
5
EXECUTED and EFFECTIVE as of the 10th day of Apri 1
,20~.
CITY OF PEARLAND
/)JI)(? --5
By: (J:(dj/~
Printed Name: Ri 11 Fi sen
Title: Ci tv Manaqer
ENGINEER
By: 7~
Printed Name:
Title: j
c;<~~ ,Oc .'~
I : . ',' '-7/
-,.. '-~ ~_j\..':' ,J
STATE OF TEXAS
COUNTY OF 1,\; c.).< ~ \
~
~
~
. BEFORE ME, the undersigned Notary Public, on this day personally appeared
~)). \ \ (,~:> (" c\ , known to me to be the person whose name is subscribed to the
foregoing instrument and acknowledged to me that he/she executed the same for the purposes
and consideration therein expressed.
GIVEN UNDER MY HAND
i-~-l (", i 111\\\\\\111111/1/11111/11:::. D., 20 L L-
0\\\;~ p... N N 1///0-
~o\S ,,,..... 8~ ~
ffo.'-..... ~ y P ....-.1/ %
t Q ......0"*'" (/&s'<~
~;z (l': ~
- -
~ ~ ~ "" j ~
"" . -<J ".-
~ ". I't: ,<(..--t::. $
~ '. OF \ . ;:::
~ .....~XPIRe.'O...... .ff
~ 0" ......... ,() ~
0. <-09 2" -#
'/111111 - U \\\\,~
/1111/1/11/1111\\\1\1\1\
AND SEAL OF OFFICE THIS
DAY OF
'j \, ! '. \
NOTARY PUBLIC IN AND FOR THE
STATE OF TEXAS
Printed Name: ; '. \ \. " (" " I
' .\
My Commission Expires: ~ '- / ,0/ I', CI ('
STATE OF TEXAS
~
~
~
COUNTY OF lie \. il ^- I .5
BEFORE ME, the undersigned Notary Public, on this day personally appeared
'I (, I.' \ ,ICf. /1, ...: "'.-, , known to me to be the person whose name is subscribed to
the foregoing instru~ent and acknowledged to me that he/she executed the same for the
purposes and consideration therein expressed.
GIVEN UNDER MY HAND AND SEAL OF OFFICE THIS
Ii ill,1 \, ,A.D., 20 ,~(. .
!
i
! ~ ~ /~
DAY OF
/'-..... / 1__
1\' ( "J :,- : , t ,,-. L.:.. (\.,-~' /{,....c-' '\
NOTARY PUBLIC IN AND FOR THE
STATE OF TEXAS
Printed Name: 'j I r.J <: L: rj,\
My Commission Expires:
6
k lot z 4~_ ass 0 cia t e s
1160 Dairy Ashford, Suite 500
Houston, Texas 77079
T 2815897257 F 281.589.7309
h 0 u sto n. office@klotz.com
March 20, 2006
Mr. Joe Wertz
Projects Director
City of Pearland
3519 Liberty Drive
Pearland, TX 77581-5416
RE: Proposal for "Hydrologic and Hydraulic Study and Hydraulic Design for Cowart
Creek for Veterans Drive-Highway 35 Extension of Bailey-Oiler Road"
Attention: Cecil Bowery
Dear Mr. Wertz:
Klotz Associates, Inc. is pleased to provide you this revised proposal for a '"Hydrologic
and Hydraulic Study and Hydraulic Design for Cowart Creek for Veterans Drive-
Highway 35 Extension of Bailey-Oiler Road." The work to be performed will provide
hydrologic and hydraulic analysis and design support to the City and Freese and Nichols,
Inc. for design of the proposed Extension of Bailey-Oiler Road from Veterans Drive to
Highway 35. This work will accomplished two primary objectives: 1) provide a
hydraulic routing evaluation and analysis to determine the hydraulic characteristics of a
detention pond to mitigate and compensate for the increased runoff and the filling of
regulatory floodplains due to the construction of the proposed Bailey-Oiler Road
Extension; and 2) demonstrate that the proposed extension, its associated drainage works,
and the detention pond will not increase the 10-year water level in Cowart Creek
upstream of Veterans Drive.
PROPOSED WORK AND FEE
Our proposed scope is described in detail in the attached Proposed Scope of Work. The
estimated cost for our services detailed by major tasks is presented below. The cost and
scope reflects some of the challenging and non common features for f10w behavior and
detention pond evaluation, as summarized in the attachment entitled "Special Technical
Concerns and Issues in Hydrologic and Hydraulic Analysis for Bailey-Oiler Road
Extension That Impact the Estimated Cost of Services," including the interaction between
Cowart Creek and Springfield Branch, the impact of the proposed detention pond on
overflows to adjacent watersheds, and multiple sources of flow with different peaking
times which must be captured by the proposed detention pond.
In summary, our proposed cost consists of the following eight elements:
k lot z 4~. ass 0 C I ate s
Mr. Joe Wertz
March 20, 2006
Page 2 of 4
Task
I. Project Mana ement, Coordination and Sco e Development
2. Data Gatherin and Confirmation of Understand in s
3. Evaluate Springfield Ditch Culvert at Confluence of Springfield Ditch and Cowat1
Creek
4. Define U stream 1m act Levels Based U on Previous and U dated Models
5. Define Extension 1m acts
6. Cowart Creek and Extension Drainage System Desi Tn and Impact
7. H draulic Routin for Determination of Detention Pond Characteristics
8. Final Report
Amount
$4,700
$4,400
$2,200
Total Lump Sum Fee
$2,600
$5,600
$6,200
$7,900
$4,600
$38,200
The above breakdown of costs composing the proposed total lump sum fee is presented
for information only; allocation of costs to various tasks is at the discretion of Klotz
Associates.
LIMITATIONS AND ADDITIONAL SERVICES
This work is to be performed in coordination with Mr. Ron Bavarian of the Pearland
office of Freese and Nichols, Inc., with Freese and Nichols providing particular data in
various formats as described in the attached proposed scope of work. Work assignments
are described in the scope; other work items requested to be done by the City or by Mr.
Bavarian shall be out-of-scope items and reimbursable to Klotz Associates on an hourly
basis at rates prescribed by the attached Klotz Associates rate schedule. Specific technical
limits to the work we will do are described in the attached scope.
Our proposal is based upon the use of the hydrologic and hydraulic models described in
and used for the report entitled "Bailey Road Drainage Improvements" prepared by JKC
and Associates, Inc. and dated January 26, 2005. These models appear to represent the
most up-to-date models for Cowart Creek and provide description of current conditions
along Cowart Creek. These models will be used to define water surface levels along
Cowart Creek. Use of other models previously developed by Klotz Associates to
compute water surface profiles would represent be out-of-scope activities.
k lot z 4~. ass 0 cat e s
Mr. Joe Wertz
March 20, 2006
Page 3 of 4
This work does not include development of CLOMR or LOMR applications and assumes
Cowart Creek flow conditions upstream of Veterans Drive will not change from their
estimated existing conditions as described for the existing conditions in the .JKC report of
January 26,2005. Regulatory floodplains boundaries shall be those currently published
by FEMA on current Flood Insurance Rate Maps.
Our services under the proposed scope include preparation of a final report, based upon
technical material and calculations either developed under previous contract to the City or
work performed under the proposed scope, which shall be suitable for presentation to the
Brazoria Drainage District No.4 to demonstrate that no increase in the I O-year water
surface upstream of Veterans Drive shall occur due to the proposed extension and
detention pond. Our work would include one meeting early in the project execution with
the Brazoria Drainage District No.4 to describe the proposed work and the methods
proposed to accomplish the work. Additional meetings with the Brazoria Drainage
District No.4 are not part of the proposed scope.
TERMS
Klotz Associates, Inc. proposes to perform the engineering services described above and
detailed in the attached Proposed Scope of Work on a lump sum basis for a total fee of
$38,200.00.
PROJECT TEAM
All work would be performed by Klotz Associates, and be under the direction of Dr.
Michael Collins. Mr. Gary Struzick would be an advisor and reviewer for the project.
SCHEDULE
We understand that time is of the essence in performance ofthis work. We propose to
complete the work described in the attached scope within 55 days after written notice to
proceed.
k lot z 4~. ass 0 C I ate s
Mr. Joe Wertz
March 20, 2006
Page 4 of 4
Klotz Associates looks forward to working with you and Mr. Cecil Bowery of your of1ice
on this project.
t
Sinc9~ly, /
! '7 .' . . .^/; / /./
'\/f/( /"
~-;{ // (.. '- '6- (... , {. If'
Michael A. Collins, P.E., Ph.D.
Storm Water Department Manager
Copy: Gary Struzick
Tom Ramsey
Ralph Cox
Attachments: Proposed Scope of Work
Special Technical Concerns and Issues
Fee Schedule
klotz4~.assoc ates
Hydrologic and Hydraulic Study and Hydraulic Design for Cowart Creek
for Veterans Drive-Highway 35 Extension of Bailey-Oiler Road
Scope of Work
BACKGROUND
The Bailey-Oiler Road Extension (Extension) in the City of Pearland (Pearland) is to be constructed
between State Highway 35 (Hwy 35) and Veterans Drive. Bailey-Oiler Road transects subwatershed
CWIOOA in the Cowart Creek watershed. Previous studies by Klotz Associates, Inc., (Preliminary
Drainage Report for Bailey/Oiler Road SH 288 to SH 35, City of Pearland, Brazoria County, March
2003; Completion Report: Evaluation of Cowart Creek and Bailey Road: Assessment of Selected
Cowart Creek Channel Improvements Options. and Supplemental Assessment of S'elected Cowart
Creek Channel Improvement Options, Letter Report to City of Pearl and , Texas, October 25, 2005)
have shown the drainage capacity of Cowart Creek to be very limited. A more recent study by JKC
Associates, Inc., (Bailey Road Drainage Improvements, January 26, 2005) using updated channel
geometry developed using recent field survey, has confirmed this limited capacity. Changes in runoff
and drainage due to road construction may affect upstream water levels in Cowart Creek as well as
result in floodplain filling; mitigation may be necessary to prevent adverse impacts. Modifications of
the Cowart Creek culvert and drainage system in the vicinity of Veterans Drive needed to drain the
proposed Extension may also impact flow and water level conditions in Cowart Creek west of
Veterans Drive and also require mitigation.
A detention pond is proposed to provide the necessary mitigation of the roadway extension, possible
drainage channel modifications along Bailey-Oiler Road, and possible Bailey-Oiler Road culvel1
modification at or near Veterans Drive. The pond would be located in the southeast corner of Lot 51
in the southwest corner of the intersection of Bailey-Oiler Road and Wells Drive approximately 2,400
feet east of Veterans Dr. Necessary mitigation work and drainage system modifications will be in the
Project area, which extends from CR 829 (approximately 1000 feet upstream and west of Veterans
Drive) eastward to Wells road and thence along Cowart Creek to Hwy 35, and includes, as well, areas
north and east of Wells Road which are impacted by the proposed Extension.
OBJECTIVES FOR WORK SCOPE
The work scope consists of hydrology and hydraulics (H&H) study and hydraulic computation for the
following purposes:
I. Determination of required mitigation volume of a detention pond to address I) increases in runoff
from the proposed construction of the Extension; 2) fill of existing 100-year floodplains due to
the proposed construction of the Extension; 3) modification of drainage conveyances from
approximately CR 829 to the east end of the Extension at HWY 35 east of the Burlington
Northern and Santa Fe Railroad (BN&SF RR); and 4) mitigation as needed of the 10-year storm
event for Cowart Creek reaches upstream of Veterans Drive. Evaluation of impacts and
mitigation needs along Bailey-Oiler Road is to be restricted to the Cowal1 Creek watershed east
ofCR 829.
2. Hydraulic design (i.e., determining size, invert, alignment and geometry) of culvert and ditch
modifications along Bailey-Oiler Road, as may be needed, between approximately CR 829
eastward along Cowart Creek to the BN&SF RR to I) carry Veterans Drive Extension drainage to
Klotz Associates Project No. 0219.028
3/20/2006Veterans Drive-Hwy 35 8ailey-Oiler Road Extension H&H Study & Design
Pagelof8
3/29/2006
Bailey-Oiler Road Extension Scope of Work 3-9-06
k lot z .~~ ass 0 cia t e s
the proposed pond and 2) mitigate adverse impact on the I O-year peak water level immediately
upstream of Veterans Drive that is not mitigated by the proposed detention pond.
3. Hydraulic determination of the size, invert, alignment and geometry of the drainage ditch along
the east side of the BN&SF RR embankment to provide drainage from the proposed roadway
extension southward to Cowart Creek.
4. Review of the capacity and modification of the geometry and inverts, if necessary, of the
previously proposed culvert conveying flow from the Springfield Ditch to Cowart Creek at the
confluence of the Springfield Ditch and Cowart Creek.
5. Hydraulic sizing and configuring of the inlet and outlet structures for the detention pond,
including their basic shapes, sizes and elevations.
It is understood that this work will be performed in coordination and cooperation with Freese and
Nichols, Inc. (FNI), with Mr. Ron Bavarian, P.E., of the FNI Pearland Office as the primary point of
contact. Deliverables to be provided under this scope are to be provided not only to the City of
Pearl and but to FNI as well.
Furthermore, because of the more recently developed field data utilized in the JKC Associates, Inc.,
January 2005 Bailey Road Drainage Improvements study (hereafter referred to as the "JKC 5'tudy"),
the hydrologic and hydraulic computer models used in the .JKC study for hydrologic and hydraulic
description of existing conditions are proposed to be used as the base model describing existing
conditions in this proposed study.
PROPOSED TASKS
1. Project Management, Coordination and Scope Development
Klotz Associates will provide continuing interaction with the City and FNI to informally report on
work progress, assess schedules, confirm standards and criteria to be used for consistency with FNI's
work, and participate in meetings with the City and/or FN I as may be require for timely and
appropriate execution of the work scope. It is anticipated that significant interaction with FNI will be
necessary during the course of work, and that contact with FNI will be frequent. Preparation of
descriptions of scope revisions and adjustments, if needed, would be included in this task. This task
also includes one meeting with Brazoria Drainage District 4.
2. Data Gathering and Confirmation of Understandings
Klotz will coordinate with FNI in identifying and obtaining information needed for hydrologic and
hydraulic calculations. Klotz Associates understands that FNI will provide needed information for
such calculations, including the project datum to be used; sewer system tailwater requirements in
terms of design frequency; electronic files describing Extension alignment, typical cross sections, and
profiles (in 3-dimensional vector format); peak discharge inputs as to Cowart Creek from Extension
drainage system runoff; roadway drainage system configuration; and sewer system drainage layouts
to deliver flow to Cowart Creek from roadway right-of-way. Klotz Associates will also coordinate
with FNI to clarify and confirm specific drainage features and criteria that need to be recognized in
the drainage design work to be performed by Klotz Associates, including the routes that drainage
flows are to take from the Extension to the proposed pond. It is Klotz Associates understanding that
FNI will design the sewer system that will collect roadway runoff and drain that runoff to Cowart
Creek (except for the ditch along the east side of the BN&SF RR, which Klotz Associates will
design).
I'\PROJECTMANAGERS\Collins_Michacl\021Y.028.000 Cowart Crcck\Vct-35 ll-U Ru llllprovclllcnt\scllpC 3-20-0(IRRR.UllC
3/20/2006 pg. 2 of 8
Bailey-Oiler Road Extension H&H Study & Design
Bailey-Oiler Road Extension Scope of Work 3-9-06
k lot z .~~ ass 0 cat e s
There will be a confirmation of the event frequency to use for evaluation of upstream impacts and
design capacity for Cowart Creek, but it is Klotz' current understanding that tailwaters for ditch
drainage will be set at existing condition 25-year levels (where existing tailwaters occur), roadway
and development strip runoff will be evaluated for a 100-year frequency for evaluation of mitigation
requirements, drainage along Cowart Creek will be designed for an existing condition 10-year event,
drainage along the east side of the BN&SF railroad will be designed far 5-year runoff frequency, and
that the detention pond will be sufficient to mitigation the 1 OO-year roadway runoff. the 1 O-year water
surface levels upstream of Veterans Drive (as may needed), and the fill of the I OO-year floodplain that
may result as a consequence of the construction of the road extension.
Klotz Associates understands that the drainage shall be designed assuming the proposed Extension is
four lanes in width. Klotz Associates also understands that FNI will provide infarmation on Extension
development width and the runoff coefficient for the development to assume for estimating runoff
from the development strip.
The previous Klotz Associates Bailey-Oiler Road report stated that "The eXlstlllg Cowart Creek
channel has less than a 10-year capacity and conveys less than 30% of the 100-year flow, with most
of the flow in the south overbank (floodplain) area." However, adverse impacts upstream of Veterans
Drive will require, if necessary, mitigation to only the existing condition 10-year storm event water
surface levels at the west end of Project near Veterans Drive.
General site and location maps will also be developed, with maps from FNI being used when
appropriate and available. It is understood that FNI will make available CADD maps that it has that
may be useful for the hydrologic and hydraulic evaluations to be prefarmed in the Project.
Other data to be developed will include floodplain boundaries and locations. It is Klotz Associates
understanding that the current FEMA-published floodplain maps (dated September 22, 1999) will be
used for this information.
Klotz Associates, with assistance from the City, will also gather two recently developed reports
pertinent to drainage behavior along Cowart Creek in the study area and flow coming from the
Springfield Ditch (the JKC study introduced above, and a study by, Klotz Associates understands,
Walter P. Moore Inc. dealing with the Springfield Branch). Klotz Associates also understands that
various flow diversion options are considered in the JKC Study for Cowart Creek flow management
upstream of Veterans Drive. It is Klotz Associates' understanding that such flow management options
are not to be considered for this project. Flow conditions upstream of the vicinity of Veterans Drive
are to be evaluated in terms of existing conditions as defined by the .JKC Study for existing
conditions.
Klotz Associates understands that new field survey data has or is being collected along Cowart Creek
within the study area under the direction of FNI. It is understood that FNI will provide these data in
electronic format to Klotz Associates for review and incorporation into the Cowart Creek channel
section description. It is also understood that Klotz Associates may make recommendations for
additional survey work to improve accuracy in the modeling of Cowart Creek.
F:\PROJECTMANAGERSICollins_MichacII0219.028.000 Cowart Crcckl Vct-35 1l-0 Rd lI11provclllcnllsCllpc 3-20-0ilRRRdoc
3/20/2006 pg. 3 of 8
Bailey-Oiler Road Extension H&H Study & Design
Bailey-Oiler Road /c,xtension Scope of Work 3-9-06
k lot z 4~. ass 0 cia t e s
3. Evaluate Springfield Ditch Culvert at Confluence of Springfield Ditch and Cowart Creek
The previously proposed design (Preliminary Drainage Reportfi)!' Bailey/Oiler Road SH 288 to SH
35, City of Pearland, Brazoria County, Klotz Associates, Inc., March 2003) of the Springfield Ditch
Culvert at the confluence of Springfield Ditch and Cowart Creek will be reviewed. Limitations in the
design will be identified and appropriate changes in the design will be recommended. The evaluation
will be based upon existing hydrologic conditions as defined in the Klotz Associates report, the JKC
report and possibly the Walter P. Moore report identified above, with recognition of flow changes
that may result from the proposed flow conditions resulting from the Extension construction. If the
evaluation of the design requires new field survey data, Klotz Associates will make recommendations
to the City and FNI for collection of necessary data by others.
4. Defining Upstream Impact Levels Based Upon Previous and Updated Models
Klotz Associates will review JKC Report for existing condition hydrologic and hydraulic models for
Cowart Creek and develop, as appropriate, an updated existing condition model, which will become
the base model for evaluating water levels. The model hydrologic and hydraulic models to be used
will be the models for existing conditions discussed in the JKC Report, updated with new cross
section data provided by FNI. The updated existing conditions model shall extend at least along
Cowart Creek from Hwy 35 to approximately CR 829. This base model will be used to compute the
estimated existing condition 10-year water surface level at CR 829 to define the water surface level
for which impacts of the Extension will be assessed. Execution of the updated existing condition
model shall use flow magnitudes as defined by the hydrologic model described in the JKC Report.
5. Defining Extension Impacts
Using information on roadway design, Klotz Associates will determine the increase in runoff due to
roadway construction and the amount of fill to be placed in floodplains due to roadway construction.
The required minimum detention storage needed to mitigate this runoff and fill will be determined.
LiDAR based maps of the detention pond site will be used to defined bottom topography of the pond
so that pond dimensions necessary to provide the required storage can be determined.
6. Cowart Creek and Extension Drainage System Design and Impact
The drainage system along Cowart Creek needed to convey flow from west of Veterans Drive to the
detention pond site and also receive drainage from the Extension will be designed using Extension
drainage sewer system 1) layout, 2) points of discharge to Cowart Creek, and 3) peak discharges at
the points of discharge as provided by FNI. This design will incorporate I) floodplain level
equalization cross drainage under Cowart Creek in the Extension roadway section along Cowart
Creek (in areas west of the BN&SF RR); 2) possible culvert modification at Veterans Drive, and 3)
possible channel section modification of Cowart Creek east of Veterans Drive.
This drainage design will also include the hydraulic design of a drainage ditch from the Extension to
Cowart Creek along the east side of the BN&SF RR embankment.
These drainage designs shall be incorporated into the updated eXIstIng condition to develop a
proposed condition hydraulic model for Cowart Creek from Hwy 35 westward to CR 829. This
model will be used to assess the impact of the proposed drainage systems on the 10-year water
surface level at CR 829. Revisions to drainage design in conjunction with detention pond design will
F:\PRO.lECTMANAGERS\Collins_Michacl\0219 028 000 Cowart Crcck\Vct-35 B-O Rd IlllplllVclllcnt\scllpC 3-2()-()(,J<.RRdllC
3/20/2006 pg. 4 of 8
Bailey-Oiler Road Extension H&H Study & Design
Bailey-Oiler Road Extension Scope of Work 3-9-06
k lot z 4~. ass 0 cia t e s
be developed and evaluated with this model to determine necessary features of the drainage system
and detention pond which will achieve a no-impact condition at CR 829 for the IO-year storm event
condition.
The proposed condition model will be developed from the base condition model by inclusion of the
new discharges and channel design associated with the roadway Extension and the proposed detention
pond.
7. Hydraulic Routing for Determination of Detention Pond Characteristics
A hydraulic routing design of the detention pond to mitigate as necessary increased runoff from the
proposed Extension and floodplain filling and prevent upstream Cowart Creek impacts (as determined
by conditions at CR 829) for the lO-year design storm condition will be provided.
This hydraulic design will recognize the transient behavior of flow along the creek and inputs to the
creek. The frequency of the storm event for which the pond will be designed will be defined in Task
2 and recognize potentially different frequencies of inflow to the pond. Time varying tailwater
conditions will also be recognized, as will minimum detention time targets.
This routing evaluation will determine the configurations, sizes, locations, and elevations of the
inflow and outflow structures of the detention pond. Freeboard and emergency discharge structure
will requirements will also be addressed.
The design water surface for the peak inflow conditions into the pond will be computed using the
hydraulic model for the proposed condition Cowart Creek channel upstream to CR 829 to
demonstrate that the roadway Extension does not cause increases in water levels upstream ofCR 829.
8. Final Report
A final report with supporting and documenting materials would be provided. The report will present
technical information summarizing the drainage and detention pond analysis and evaluation and a
demonstration of no impact for the I O-year storm event upstream of the Veterans Drive.
DELIVERABLES
The deliverables for this project shall be 1) one draft copy of the final rep0l1; 2) 4 copies of the final
report (one of the four copies will be provided to FNI); and 3) individual interim technical
memorandum during the course of the project (1 copy to the City and I copy to FNI) providing or
describing the following:
Deliverable I. "Statement of Design Assumptions and Criteria": A statement of design assumptions
and criteria, including design frequencies; locations where specific water surface elevation
elevations may be required; flow path alignments; datum to be used; Rational Method runoff
coefficients to be used; identification of the FEMA FIRM panels which shall be used to define the
floodplain boundaries to determine compensatory storage; and other parameters Klotz Associates
believes are significant for joint agreement and understanding between Klotz Associates, the City
of Pearland, and FNI.
Deliverable 2. "Springfield Culvert Design": Memorandum describing evaluation and hydraulic
resizing, if necessary, of the culvert crossing at the confluence of Cowart Creek and the
f:\PRO.lECTMANAUERS\Collins_Michacl\0219.028.000 Cowart Crcck\Vcl-35 B-O Rd illlpruvclllcnt\scllpC 3-20-0(lRRR.dllC
3/20/2006 pg. 5 of 8
Bailey-Oiler Road Extension H&H Study & Design
Bailey-Oiler Road Extension Scope ()l Work 3-9-06
klotz4~.assoc ates
Springfield Ditch (Hydraulic design shall specifically mean specifically: culvert box Size,
number, inverts, location and length).
Deliverable 3. "BN&SF Drainage Ditch Design": Memorandum presenting hydraulic design of the
drainage ditch from the Extension southward to Cowart Creek along the east side of the BN&SF
RR embankment (Hydraulic design shall specifically mean: ditch size, geometry, invert,
alignment, and tailwater level.)
Deliverable 4. "Hydraulic and Hydrologic Models": Electronic copies of nonproprietary hydraulic
and hydrologic models used to demonstrate no impact of 10-year storm event to Cowart Creek
upstream of Veterans Drive.
Deliverable 5. "Veterans Drive Culvert and Ditch Design": Memorandum presenting hydraulic
design of the Veterans Drive culvert crossing of Cowart Creek (I [ydraulic design shall
specifically mean: size, location, length, and inverts.)
Deliverable 6. "Hydraulic Routing for Determination of Detention Pond Characteristics":
Memorandum presenting hydraulic characteristics of the detention pond and its inlet and outlet
works for the proposed detention pond (Hydraulic determination shall specifically mean: pond
volume and representative depths; inflow weir, length, type and configuration, location, and
elevations; outfall pipe sizes, inverts, lengths and locations).
Deliverable 7. "Equalizer Pipes Design": Memorandum presenting hydraulic design of the flood
condition equalize pipes under the proposed Extension west of the BN&SF railroad to equalize
lOO-year flood levels on each side of the propose Extension. (Hydraulic design shall specifically
mean: pipe sizes, locations, inverts, and lengths.)
Deliverable 8. "Final Report": A final report documenting the hydraulic features of the detention
pond and the basis and results of the impact assessment, including a demonstration of no impact
for the lO-year storm event upstream of the Veterans Drive.
OTHER LIMIT A TIONS AND ASSUMPTIONS
In addition to limitations and assumptions stated in the task descriptions, the following shall also
apply:
1. Environmental site evaluation and assessment is not part of the scope. [t is not the responsibility
of Klotz Associates to assess limitations on pond site, location, or feasibility presented by,
restricted by, or otherwise limited be environmental site or permit conditions. Unless information
is provided to other effect, no environmental restrictions or limitations will be assumed to exist
at the proposed pond site. Environmental perm itting is not part of this scope of work.
2. Preparation of reports in direct support of a Conditional Letter of Map Revision (CLOMR) or a
Letter of Map Revision (LOMR) is not part of this scope of work.
3. Data on the proposed Extension alignment, profile and footprint will be provided by FNI to
Klotz Associates in electronic format and in such form as to be useable for electronic volume
calculations without digitizing (such as 3-D polylines or Cogo points). [fdigitizing is necessary,
such digitizing shall be considered an out-of-scope activity.
4. Survey data shall be provided by FN[ (or by land surveyor) in electronic format, with
accompanying format description. Survey data must be geo-referenced or projected on a
specified coordinate systems. FN[ (or land surveyor under FN[ direction) will identify the
project datum for which information is to be presented and provide datum adjustment necessary
to convert the FEMA datum for applicable FIRM maps to the project datum.
5. FNI is to design all Extension roadway drainage (except for the drainage ditch along the east side
of the BN&SF RR embankment, for which Klotz Associates will determine size, geometry,
invert and alignment) to the point of discharge to Cowart Creek, and at such points of discharge
F \PROJECTMANAGERS\Collins_Michacl\0219 028 000 Cowart Crcck\ Vct-J5 U-O Rd ill1pmvcll1clll\SCllpC J-20-()(lRRR.doc
3/20/2006 pg. 6 of 8
Bailey-Oiler Road Extension H&H Study & Design
Bailey-Oiler Road Extension Scope ()f Work 3-9-06
k lot z 4~. ass 0 cia t e s
shall provide the peak discharge for the design frequency of such drainage. Except for the
drainage ditch along the east side of the BN&SF RR embankment, Klotz Associates shall be
responsible only for drainage evaluation after flow enters Cowal1 Creek.
6. Hydrologic and hydraulic model along Cowart Creek will be based upon the models described
and used for calculations in the JKC Study. It is assumed the City of Pearl and will assist as may
be necessary in obtaining working electronic copies of these models. If these models are not
made available to Klotz Associates after due diligence in acquiring them in a reasonable period
of time after start of the proposed work, all hydrologic and hydraulic model for flow conditions
along Cowart Creek shall be out-of-scope work.
7. Klotz Associates will not be responsible for modeling water surface levels along the Springfield
Branch upstream of the culvert at the confluence of the Springfield Branch and Cowart Creek.
8. Klotz Associates shall be responsible for the design of only two culvert systems: the culvert
system crossing at Veterans Drive and the Springfield Branch Culvert system at the confluence
of the Springfield Ditch and Cowart Creek.
9. Hydraulic design of drainage shall assume the proposed detention pond is constructed and shall
be able to rely upon the presence of the proposed detention pond for its operation.
10. The "Statement of Design Assumptions and Criteria" (Deliverable No.1) submitted by Klotz
Associates shall be considered correct and accurate for design purposes if no response is
provided by the City or FNI to the submitted Statement within 5 days after its submittal to the
City and FNI and 5 days after meeting with the Brazoria Drainage District No.4, whichever
comes later. If changes or revision in work become necessary because of City, FNI or Brazoria
Drainage District No.4 desired, recommended, or required changes to the "Statement of Design
Assumptions and Criteria," such changes or revisions shall be out-of-scope work.
11. Meetings with parties representing 1) cities other than the City of Pearl and, 2) a county, or 3) a
drainage district shall be out-of-scope work, except that one meeting with the Brazoria Drainage
District NO.4 shall be part of the Scope.
PROPOSED SCHEDULE
Works shall commence upon written notice-to-proceed. Deliverables shall be provided according to
the following schedule:
Deliverable 1. "Statement of Design Assumptions and Criteria": 7 days after written notice-to-
proceed.
Deliverable 2. "Springfield Culvert Design": 30 days after written notice-to-proceed
Deliverable 3. "BN&SF Drainage Ditch Design": 21 days after written notice-to-proceed, but no
earlier than 14 days after design flow for the ditch is provided to Klotz Associates by FNI.
Deliverable 4. "Hydraulic and Hydrologic Models": at the same time as Deliverable 8
Deliverable 5. "Veterans Drive Culvert and Ditch Design": 45 days after written notice-to-proceed
Deliverable 6. "Detention Pond Design": 45 days after written notice-to-proceed
Deliverable 7. "Equalizer Pipes Design": 45 days after written notice-to-proceed
Deliverable 8. "Final Report": 55 days after written notice-to-proceed.
Klotz Associates proposes to meet with Brazoria Drainage District No.4 no earlier than 7 days and
not later than 15 days after written notice-to-proceed.
FIPROJECTMANAGERSICollins_MichaclI0219.02X.OOO Cowart Creekl Vet-35 l3-0 I\d Ill1prO\CIllclltlscope 3-20-061\1\1\.doc
3/20/2006 pg. 7 of 8
Bailey-Oiler Road Extension H&H Study & Design
Bailey-Oiler Road Extension Scope of Work 3-9-06
k lot z 4~. ass 0 cat e s
PROPOSED FEES
The following table summarizes the proposed fees for various tasks; the breakdown of proposed fees
for individual tasks is provided only for information purposes. The fees proposed for individual tasks
may be reallocated by Klotz Associates at any time without approval of the City provided the total
proposed fee is not increased.
Task Fee Allocation (subject to change by Klotz
Associates at Klotz Associates discretion)
I. Project Management, Coordination and Scope $4,700
Development
2. Data Gathering and Confirmation of Understandings $4,200
3. Evaluate Springfield Ditch Culvert at Confluence of $2,200
Springfield Ditch and Cowart Creek
4. Define Upstream Impact Levels Based Upon Previous and $2,600
Updated Models
5. Define Extension Impacts $5,600
6. Cowart Creek and Extension Drainage System Design and $6,200
Impact
7. Hydraulic Routing for Determ ination of Detention Pond $ 7,900
Characteristics
8. Final Report $4,600
PROPOSED TOTAL LUMP SUM FEE
$38,200
F:\PROJECTMANAGERS\Collins_Michacl\0219028.000 Cowart Crcck\VCl.35 B.O Rd illlprovclllClll\SCOpc 3-20-0()/ZRltdoc
3/20/2006 pg. 8 of 8
Bailey-Oiler Road Extension H&H Study & Design
k lot z .~~ ass 0 cat e s
Special Technical Concerns and Issues in Hydrologic and Hydraulic Analysis for
Bailey-Oiler Road Extension That Impact the Estimated Cost of Services
As Arranged by Major Task
1. Project Management, Coordination and Scope Development
a. It is assumed that a single meeting with DD4 would be included in this task; such a meeting
was not originally envisioned.
2. Data Gathering and Confirmation of Understandings
a. The scope assumes that the hydrologic and hydraulic computer models utilized in the 2006
JKC report as presented and discussed in the 2006 JKC report will be made available to Klotz
Associates without significant difficulty or delay. The proposed scope cost assumes such
availability. If for some reason these models are not available or are not as described in the
2006 JKC report, additional time and cost will result in out-of--scope activities.
b. In development of data, we will need to be sure that all elevation data are checked for their
consistency or conversion to a common datum. To assure such consistency, a subtask in Task
2 will be a confirmation of the various datums and bench marks being used and a check of
their consistency.
3. Evaluate Springfield Ditch Culvert at Confluence of Springfield Ditch and Cowart
Creek
a. While the apparent issue with the Springfield Ditch Culvert is an incorrectly located invert,
redesign of the culvert to address this issue is not merely an issue of shifting the culvert
invert. The updated existing condition may not agree with the design discharge for the
culvert as originally designed; both the JKC report and the Walter P. Moore report may have
different discharges. If those different discharges are significantly different, identification of
the appropriate discharge will be required.
b. Furthermore, the vertical constraint on the culvert will depend upon the proposed roadway
Extension elevations and allowable headwater elevations; thus the proposed boxes may have
to be replaced by alternative sizes and number of barrels to accommodate roadway
elevations.
c. In addition, with the detention pond in place, backwater conditions at the confluence between
the Springfield Ditch and Cowart Creek may be significantly different than was assumed in
the original design, and the resulting capacity of the culvert may be less or move (likely
more) than the capacity under existing conditions. Cost efficiency would than dictate that
such change in capacity be recognized, thus necessitating a different design.
4. Defining Upstream Impact Levels Based Upon Previous and Updated Models
a. Use of the 2006 JKC model, as proposed, is expected to significantly enhance the modeling
effort because of the updates in geometry made since the original Klotz repOli. Conversely, if
Klotz Associates Project No. 0219.021.000
3-21-06
lof3
k lot z 4~~ ass 0 cat e s
the 2006 JKC model were not to become available, the level of effort to convert the Klotz
report model to an updated condition would require significant out-of-scope work.
b. The JKC model will, based upon statements made by FNl, require update to incorporate new
cross section data developed specifically for the Extension design. Consistency of this data
with the JKC model data will have to be verified. In addition, because the new data will
possibly affect water surface levels upstream of Veterans Drive, a new base existing
condition will have to be computed and documented in the analysis and final report. If
significant differences, while not expected, between the JKC model and the updated JKC
model result, out-of-scope work may be necessary to resolve such differences.
5. Defining Extension Impacts
a. It is Klotz understandings that FNI will be providing only the peak discharge for the design
flow runoff from the roadway. However, impact may have to be determ ined for the 100-year
flow and for the volume of runoff. Consequently the roadway discharges to be provided by
FNI will, not by themselves, be sufficient to determine the impact of roadway construction on
runoff volume. The discharges provided by FNI will have to be scaled to the appropriate
design frequency, based upon rainfall intensity, and, as well, complete hydrographs (for some
equivalent measure) will have to be generated for each outfall point so that runoff volume can
be estimated. Thus, the data for peak runoff from the roadway provided by FN I will require
significant additional computation and enhancement to determine roadway runoff impacts.
6. Cowart Creek and Extension Drainage System Design and Impact
a. The design of the culvert west of Veterans Drive may be significantly impacted by backwater
effects of discharge increases to Cowart Creek flow coming from the drainage system for the
Extension since runoff flows will be added to Cowart Creek upstream of the intake point to
the new detention pond. Consequently, use of estimated current discharges to design the
culvert may underestimate the impact of the culvert on water surface levels upstream of
Veterans Road. Use of current culvert box sizes to guide the selection of the new culvert size
may be misleading if not carefully selected to recognize future peak flow conditions and
consequent backwater, particularly at 10-year flow levels where the detention diversion may
be limited.
b. Selection of the appropriate size for the floodplain equalization drains is not straightforward
because of the connection of the FEMA floodplains along Cowart Creek and the Springfield
tributary. Equalization pipes are intended to remove the blockage to floodplain flow caused
by the roadway Extension. But because of the connected floodplains, drainage of flow from
the north side of the Extension (and west of the railroad) will be draining floodplain areas for
the Springfield tributary as much or more than the areas of Cowart Creek. Conversely, if
build-up of levels south of the Extension are to be avoided under the I OO-year flood level, the
flow allowed to drain northward may flood the Springfield tributary areas and aggravate
flood levels there. Consequently, if a cost effect sizing of the equalization culverts is to be
achieved, recognition of the source and consequent timing of the 100-year flood levels may
be necessary for an appropriate design.
Klotz Associates Project No. 0219.021.000
3-21-06
20f3
k lot z 4~~ ass 0 cat e s
c. Related to item b above is the fact that Extension will apparently cross the Springfield Ditch
floodway, and fill in floodways is normally prohibited. How this will be compensated for or
treated by detention storage is unclear in the present situation.
d. In addition, it is to be noted that the proposed drainage ditch east of the railroad will drain to
Cowart Creek immediately upstream of a floodplain zone. Thus there may be, depending
upon how the detention pond operates, an increase in the peak flow to the east of the railroad.
If that is the case, the floodplain width will change and there will be issues of compensation
storage. Conversely, to avoid this impact, the design of the detention pond will have to have
another constraint, i.e., assure that sufficient flow will be able to be captured to compensate
for the ditch flow along the railroad so that the total discharge moving eastward from the
railroad does not increase above current levels.
7. Hydraulic Routing for Determination of Detention Pond Characteristics
a. The hydraulic routing and the necessary inlet weir and outlet drain for a detention pond which
is to be accomplished under this task must deal with multiple sources of inflow (i.e., flow
from the upstream reaches of Cowart Creek; backwater created by the railroad culverts by
which Cowart Creek passes under the railroad; and the inflow from the Extension runoff)
with different times of peaking. Hydrographs for each these different peaking flows will
have to be determined. Because timing of peaks will be subject to considerable uncertainty, a
conservative design which is not overly so will have to be identified.
b. In addition, the current discharge along Cowart Creek has overflows to south in the reach
west of the railroad. With construction of a pond, it can be expected that such overflows will
decrease or even be possibly eliminated. Thus the design flows in the vicinity of the pond
will be modified by the pond itself; and a method will have to be devised for dealing with the
reduction in watershed overflow that the pond will induce; this may be a challenging task.
Klotz Associates Project No. 0219.021.000
3-21-06
30f3
Rate Category Billing Table List
500
Klotz Standard Billing Rates
Category Principal
Category 4 Division Manager
Available For Project Planning
Wednesday, March 22, 2006
2:49:39 PM
Rate Sequence
180.0000
180.0000 3
160.0000 5
150.0000 6
130.0000 7
110.0000 8
100.0000 9
90.0000 13
105.0000 14
80.0000 16
65.0000 23
Klotz Associates, Inc.
Table
Employee
Employee Name
Category 5 Senior Project
Manager
Category 6 Project Manager
Category 7 Senior Project
Engineer
Category 8 Project Engineer
Category 9 Graduate Engineer
Category 13 GIS Specialist
Category 14 Senior Designer
Category 16 CADD Technician
Category 23 Clerical
** End of Report **
v3.0 (SP4) (ZAMUDIOE) -
Page I