Contract - Halff Associates, Inc. - 9/13/2018 STATE OF TEXAS §
COUNTY OF WILLIAMSON §
SUPPLEMENTAL CONTRACT NO. 1
TO CONTRACT FOR ENGINEERING SERVICES
FOR CHISHOLM VALLEY DRAINAGE ASSESSMENT
WORK AUTHORIZATION
FIRM: HALFF ASSOCIATES, INC. (`Engineer")
ADDRESS: 9500 Amberglen Boulevard, Building F, Suite 125,Austin, TX 78729
This Supplemental Contract No. 1 to Contract for Engineering Services is made by and between
the City of Round Rock, Texas, hereinafter called the "City" and Halff Associates, Inc.,
hereinafter called the "Engineer".
WHEREAS, the City and Engineer executed a Contract for Engineering Services, hereinafter
called the "Contract", on the 7th day of December, 2017 for the Chisholm Valley Drainage
Assessment Work Authorization Project in the amount of$75,000.00; and
WHEREAS, it has become necessary to amend the Contract to modify the provisions for the
scope of services and to increase the compensation by $39,482.00 to a total of$114,482.00;
NOW THEREFORE, premises considered, the City and the Engineer agree that said Contract
is amended as follows:
I.
Article 1, City Services and Exhibit A, City Services shall be amended as set forth in the
attached Addendum To Exhibit A.
II.
Article 2, Engineering Services and Exhibit B, Engineering Services shall be amended as set
forth in the attached Addendum to Exhibit B.
III.
Article 4, Compensation and Exhibit C, Fee Schedule shall be amended by increasing by
$39,482.00 the maximum amount payable under the Contract for a total of $114,482.00, as
shown by the attached Addendum to Exhibit C.
Supplemental Contract Rev.06/16
0199.1767;0040848 84275
1Z U( W(02-
1
IN WITNESS WHEREOF, the City and the Engineer have executed this Supplemental
Contract in duplicate.
[signature pages follow]
Supplemental Contract Rev.06/16
0199.1767;0040848 84275
2
HALFF ASSOCIATES,INC.
By:
Date
Supplemental Contract Rev.06/16
0199.1767;0040848 84275
3
CITY OF ROUND ROCK 4Stepha
D AS FORM:
By:
Craig Morgan,�qayk/
Sheets, City Attorney
9• 1:�`(v
Date
Supplemental Contract Rev.06/16
0199.1767;0040848 84275
4
ADDENDUM TO EXHIBIT A
City Services
The City will provide the following information and other assistance to the Engineer that the City
deems appropriate and necessary:
1. Any readily available pertinent existing information relating to the services to be performed
by the Engineer;the City will provide one copy of such information in a format chosen by the
City. This may include plans, as-built data, GIS data, or previous studies in or adjacent to the
project area.
2. Clear direction and/or response to questions or requests made by the Engineer in the course
of the Engineer's performance of services.
3. Timely review of deliverables that have been properly completed and submitted by the
Engineer; and timely provisions of comments, if any, to the Engineer resulting from said
reviews.
4. Provide access to property required to perform any field investigations required as part of the
Engineer's scope of work.
5. City will conduct field observations and gather measurements as needed for theproject.
ADDENDUM TO EXHIBIT B
Engineering Services
WORK AUTHORIZATION NO. 2
Chisholm Valley Drainage Assessment Project—Flood Reduction Alternative Study_
1. PROJECT PURPOSE
The purpose of the project is to identify and quantify flood risk areas within the Chisholm Valley
neighborhood project limits. Work involves developing solutions and a plan to implement
necessary drainage improvements. The tasks under this contract may require unusually complex
analysis of storm drains, overland flow, and creek interactions.
At the request of the CORR Stormwater Staff,Halff Associates, Inc. (Engineer)has developed this
scope and fee proposal to further evaluate flood mitigation options in the Chisholm Valley
neighborhood. Work Authorization No. 1, which is completed, focused on data collection,
development of a preliminary 2D hydraulic model, and identification of five (5) flood problem
areas within the Chisholm Valley neighborhood. This Work Authorization No. 2 will develop
flood mitigation solutions for the flood risk areas that were identified in Work Authorization No.
1: Areas 1 through 5. See map below for each area's specific locations.
The Chisholm Valley neighborhood is approximately 540 acres with Lake Creek Tributary 1
flowing from north to south on the eastern side of the neighborhood and Lake Creek Tributary 1 A
flowing from the south west area. Halff has conducted detailed hydrology and hydraulic modeling
for Lake Creek Tributary 1 and I which includes the Engineering Evaluation for Chisholm
Valley Drainage Modeling Project, dated June 2015, and Preliminary Engineering Report for
Frontier Trail Culvert and Downstream Channel Improvements Project, dated May 2016. It
should be noted that subsequent FEMA analysis and the 2017 Preliminary Flood Insurance Rate
Maps refer to the two streams as Lake Creek Tributary 1 (previously Tributary 6) and IA
(previously Tributary 6A).
2. SCOPE OF WORK
The scope of work for the services to be provided under this work authorization may include the
following tasks:
Chisholm Valley Drainage Assessment
• Task 1: Project Management
• Task 2: Data Collection and Review
• Task 3: Local Flood Mitigation Solutions
• Task 4: Prepare Documentation
Task 1: Project Manage=
Perform general Project Management and coordination during the course of the project
including the following:
a. Conduct and attend project kick-off and data gathering meeting with the City to discuss
any additional information not gathered during WA#1.
1
b. Prepare meeting minute summaries for applicable meetings during the project.
c. Create and submit monthly invoices in required city format.
d. Prepare monthly progress reports that will be submitted to the City with invoices to
provide a written account of the progress made to date on the project.
Task 2: Data Collection and Review
Halff will collect and review the following data of the project area provided by the City to
conduct the analysis. Additional ground survey, geotechnical investigations, subsurface
investigations will not be performed for the phase of the project but may be needed in subsequent
phases. Any field reconnaissance necessary for this project will be performed by City staff.
a. Evaluate results of existing conditions ICM model developed in Work Authorization#1.
b. Review previous studies, as-built plans, existing survey data, LiDAR data, relevant GIS
data, preliminary FEMA models and floodplains in coordination with City staff. If
additional ground or storm drain survey is needed, then a supplemental will be submitted
to the City at that time.
c. Assess newly obtained data collected to further refine the ICM model for flood mitigation
solutions as needed.
d. Conduct an evaluation comparison between the 2012 to 2017 LiDAR and make a
determination on which terrain to use for the ICM model. If the 2017 is selected for
use in the model, a supplemental will be requested at that time to update the model.
Task 3: Local Flood MitiLration Solutions
Halff will utilize the ICM 2D model developed in the previous phase to develop flood mitigation
solutions for the flood problems areas identified. Limited, if any, changes will be made to the
existing conditions 2D model made in the previous phase. Tasks will include the following:
a. Develop one (1) flood mitigation solution for Flood Problem Areas 1, 3, 4, and 5
identified in the previous phase and by the City. This includes all the flood problem areas
seen in Figure 1 below except for Area 2.
b. Assess effectiveness of each proposed flood mitigation solution by comparing existing
and proposed conditions results.
c. Conduct internal quality assurance-quality control (QA/QC) reviews of proposed
alternatives hydrologic and hydraulic modeling.
d. Prepare probable cost estimate for each flood mitigation solution developed based on unit
costs provided by the City.
e. Develop an exhibit of the flood problem areas with 25-year design storm inundation areas
mapped,potential flooded habitable structures identified, and flood inundation areas
outside of public ROW identified for each proposed alternative. Finished floor elevations
(FFE) will be based on the LiDAR determination above and field observations where
actual FFE survey is not available.
2
MODEL ♦�♦
LIMITS��� �
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2
4
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172 ads100 � � .. �•
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Figure 1. Flood Problem Areas
Task 4: Prepare Documentation
a. Conduct and attend one (1) meeting to present and discuss data findings with the City and
discuss scoping for the subsequent Preliminary Engineering study phase.
b. Prepare a brief memorandum to document the flood mitigation solutions developed. This
memorandum will build off the memorandum written in the previous phase.
Work Schedule
Halff anticipates completing Work Authorization No. 2 within fifteen(15)weeks after receiving a
Notice to Proceed(NTP).
3
ADDENDUM TO EXHIBIT C
Fee Schedule
Attached Behind This Page
City of Round Rock Chisholm Valley Drainage Assessment
Contract for Engineering Services
ATTACHMENT C
Fee Schedule
Hourly rates to be billed on a time and materials basis per the following Rate Schedule attached
(behind this page):
*Rates may be amended once between Nov. 1, 2018 and Nov. 1,2019,not to exceed a 3%increase.
Chisholm Valley Drainage Assessment
Exhibit C
Fee Schedule
Total Total Other TOTALS
Task Labor Hours Loaded Labor Cost Direct Costs Subconsultants
1, Work Authorization
ask 1:Project Management 28 $4,720.00 $0.00 $0.00 $4,720.00
ask 2:Data Collection and Assessment 100 $12,800.00 $0.00 $0.00 $12,800.00
ask 3:Existing Hydrologic&Hydraulic Assessment 270 $35,784.00 $0.00 $0.00 $35,784.00
ask 4:Prepare Documentation 62 $8,948.00 $145.00 $0.00 $9,093.00
WORK AUTHORIZATION NO.1 TOTAL: 460 $ 62,252.00 $ 145.00 $0.00 $ 62,397.00
Work Authonization No.2
ask 1:Project Management 32 $4,620.00 $0.00 $0.00 $4,620.00
ask 2:Data Collection and Review 16 $1,880.00 $0.00 $0.00 $1,880.00
ask 3:Local Flood Mitigation Solutions 314 $41,040.00 $0.00 $0.00 $41,040.00
ask 4:Prepare Documentation 28 $4,400.00 $145.00 $0.00 $4,545.00
WORK AUTHORIZATION NO.2 TO I TAL:1 390 1 $ 51,940.00 1 $ 145.00 $0.00 $ 52,085.00
TOTAL PROJECT COST:r$ 114,482.00
Chisholm Valley Drainage Assessment-E:xhibit D Page D1 of 1
CERTIFICATE OF INTERESTED PARTIES FORM 1295
1 of 2
Complete Nos.1-4 and 6 if there are interested parties. OFFICE USE ONLY
Complete Nos.1,2,3,5,and 6 if there are no interested parties. CERTIFICATION OF FILING
1 Name of business entity filing form,and the city,state and country of the business entity's place Certificate Number:
of business. 2018-397670
Halff Associates, Inc.
Richardson,TX United States Date Filed:
2 Name of governmental entity or state agency that is a party to the contract for which the forms 08/29/2018
being filed.
City of Round Rock Date Acknowledged:
3 Provide the identification number used by the governmental entity or state agency to track or identify the contract,and provide a
description of the services,goods,or other property to be provided under the contract.
Chisholm Valley Drainage
Engineering Services
4 Nature of interest
Name of Interested Party City,State,Country(place of business) (check applicable)
Controlling Intermediary
Engelhardt,Cindy Austin,TX United States X
Bargainer,Tim Austin,TX United States X
Tanksley,, Dan Richardson,TX United States X
Skipwith,Walter Richardson,TX United States X
Murray, Menton McAllen,TX United States X
Plugge, Roman Richardson,TX United States X
Molloy, Martin Richardson,TX United States X
Moya, Mike Austin,TX United States X
Kuhn,Greg Richardson,TX United States X
Killen, Russell Richardson,TX United States X
Ickert,Andrew Fort Worth,TX United States X
Jackson ,Todd Austin,TX United States X
Craig , Matthew Richardson,TX United States X
Adams, Bobby Houston,TX United States X
Forms provided by Texas Ethics Commission www.ethics.state.tx.us Version V1.0.6711
CERTIFICATE OF INTERESTED PARTIES FORM 1295
2 of 2
Complete Nos.1-4 and 6 if there are interested parties. OFFICE USE ONLY
Complete Nos.1,2,3,5,and 6 if there are no interested parties. CERTIFICATION OF FILING
1 Name of business entity filing form,and the city,state and country of the business entity's place Certificate Number:
of business. 2018-397670
Halff Associates, Inc.
Richardson,TX United States Date Filed:
2 Name of governmental entity or state agency that is a party to the contract foF which the form is 08/29/2018
being filed.
City of Round Rock Date Acknowledged:
3 Provide the identification number used by the governmental entity or state agency to track or identify the contract,and provide a
description of the services,goods;or other property to be provided under the contract.
Chisholm Valley Drainage
Engineering Services
4 Nature of interest
Name of Interested Party City,State,Country(place of business) (check applicable)
Controlling Intermediary
5 Check only if there is NO Interested Party.
6 UNSWORN DECLARATION
._
My name is GvM I�/1'1��/� (/(� and my date of birth ist
»y address is 1i vc CfU10
(street) (city) (state) (zip code) (country)
1 declare under penalty of perjury that the foregoing is true and correct.
Executed in Y Otto County, State of � ,on the day of ,20JO
onth) (year)
c
A 111A r11A/7 V h//)
kskl6
ature of/authori d agent of contracting business entity
(Declarant)
Forms provided by Texas Ethics Commission www.ethics.state.tx.us Version V1.0.6711
CERTIFICATE OF INTERESTED PARTIES FORM 1295
1of2
Complete Nos.1-4 and 6 if there are interested parties. OFFICE USE ONLY
Complete Nos.1,2,3,5,and 6 if there are no interested parties. CERTIFICATION OF FILING
1 Name of business entity filing form,and the city,state and country of the business entity's place Certificate Number:
of business. 2018-397670
Halff Associates, Inc.
Richardson,TX United States Date Filed:
2 Name of governmental entity or state agency that is a party to the contract for which the form is 08/29/2018
being filed.
City of Round Rock Date Acknowledged:
08/31/2018
3 Provide the identification number used by the governmental entity or state agency to track or identify the contract,and provide a
description of the services,goods,or other property to be provided under the contract.
Chisholm Valley Drainage
Engineering Services
4
Nature of interest
Name of Interested Party City,State,Country(place of business) (check applicable)
Controlling Intermediary
Engelhardt, Cindy Austin,TX United States X
Bargainer,Tim Austin,TX United States X
Tanksley,, Dan Richardson,TX United States X
Skipwith,Walter Richardson,TX United States X
Murray, Menton McAllen,TX United States X
Plugge, Roman Richardson,TX United States X
Molloy, Martin Richardson,TX United States X
Moya, Mike Austin,TX United States X
Kuhn, Greg Richardson, TX United States X
Killen, Russell Richardson,TX United States X
Ickert,Andrew Fort Worth,TX United States X
Jackson ,Todd Austin,TX United States X
Craig , Matthew Richardson,TX United States X
Adams, Bobby Houston,TX United States X
Forms provided by Texas Ethics Commission www.ethics.state.tx.us Version V1.0.6711
CERTIFICATE OF INTERESTED PARTIES FORM 1295
2of2
Complete Nos.1-4 and 6 if there are interested parties. OFFICE USE ONLY
Complete Nos.1,2,3,5,and 6 if there are no interested parties. CERTIFICATION OF FILING
1 Name of business entity filing form,and the city,state and country of the business entity's place Certificate Number:
of business. 2018-397670
Halff Associates, Inc.
Richardson,TX United States Date Filed:
2 Name of governmental entity or state agency that is a party to the contract for which the form is 08/29/2018
being filed.
City of Round Rock Date Acknowledged:
08/31/2018
g Provide the identification number used by the governmental entity or state agency to track or identify the contract,and provide a
description of the services,goods,or other property to be provided under the contract.
Chisholm Valley Drainage
Engineering Services
4 Nature of interest
Name of Interested Party City,State,Country(place of business) (check applicable)
Controlling Intermediary
5 Check only if there is NO Interested Party. ❑
6 UNSWORN DECLARATION
My name is and my date of birth is
My address is
(street) (city) (state) (zip code) (country)
I declare under penalty of perjury that the foregoing is true and correct.
Executed in County, State of on the day of 20
(month) (year)
Signature of authorized agent of contracting business entity
(Declarant)
Forms provided by Texas Ethics Commission www.ethics.state.tx.us Version V1.0.6711