GM-16-01-27-063hdrinc.com
4401 West Gate Boulevard, Suite 400, Austin, TX 78745
T 512.912.5100 F 512.912.5158
Texas Registered Engineering Firm F-754
January 27, 2016
Mr. Tom Gallier, General Manager
Brushy Creek Regional Utility Authority
221 East Main Street
Round Rock, TX 78664
Reference: Supplemental Amendment No. 4 for BCRUA Regional Water System
Phase 2 Deep Water Intake Preliminary Design
Dear Mr. Gallier,
HDR Engineering, Inc. (HDR) and the Brushy Creek Regional Utility Authority (BCRUA) entered
into a professional services agreement approved by the BCRUA Board on November 19, 2014 for
preliminary design of the Phase 2 Deep Water Intake. The purposes of Supplemental Amendment
No. 4 are to authorize supplemental physical model testing and additional environmental
evaluations of the Pedernales Electric Cooperative Nameless substation site.
HDR’s services will include the tasks described in the accompanying Exhibits. The total
compensation for the scope of services will not exceed $29,700. Supplemental Amendment No. 4
increases the total compensation amount of Task 2.0 – Jurisdicational and Environmental
Permitting Agency Coordination to $318,500 and Task 7.0 – Pump Station to $1,497,700 thereby
increasing the total compensation amount of the Agreement to $6,423,300. If it becomes apparent
that the compensation amount will be exceeded, HDR will give written notice of thereof for
BCRUA’s consideration.
Please review this proposal at your convenience and contact me if you have any questions or need
additional information to support your review.
Sincerely,
HDR Engineering, Inc.
Aaron Archer, P.E. Kelly J. Kaatz, P.E.
Project Manager Senior Vice President
Approved: 01/28/2016
GM-16-01-27-063
1/27/2016
ADDENDUM TO EXHIBIT B
ENGINEERING SERVICES
GENERAL
The purposes of Supplemental Amendment No. 4 are to perform additional physical
modeling testing and perform an environmental review of the proposed Nameless
substation expansion plan.
BASIC SCOPE OF SERVICES
Task 2.0 – Jurisdictional and Environmental Permitting Agency Coordination
Insert Task 2.9 as follows:
2.9 Nameless Substation and Distribution Route Environmental Assessment.
Perform the following evaluations in the area of the proposed expansion of the
PEC Nameless Substation and document the results.
2.9.1 Waters of the U.S. Determination. Identify location and extent of
potential waters of the U.S. in accordance with Section 404 of the Clean
Water Act. Desktop and field investigations will be completed.
2.9.2 Cultural Resources Survey. Conduct a cultural resources survey
including preparation of a Texas Historical Commission Antiquities Code
permit application. The survey shall include shovel testing, pedestrian
survey, site photography, recording and delineation of any newly
discovered archeological resources, assessments of site eligibility for
including on the Nation Register of Historical Places or for listing as
State Antiquities Landmarks, data analysis, and report preparation. No
artifacts will be collected as part of the survey effort. This task does not
include Phase II NRHP archeological testing or the recovery of human
burials.
2.9.3 Phase I Environmental Site Assessment (ESA). Conduct field work and
prepare a Phase 1 ESA report in accordance with ASTM Standards 1527-
13 and All Appropriate Inquiry (AAI). The report will identify the
potential presence and negative impacts of hazardous materials at the
site. SBA certification is not included.
2.9.4 Endangered Species Evaluation. Perform a desktop evaluation for
federally listed species know to occur in Travis County, Texas. Utilize
available habitat modeling, documented observations of endangered
species, mapped vegetation types on-site, current and historical aerial
photography and topography.
2.9.5 Distribution Route Environmental Constraints Review. Review known
archeological and cultural resources, EPA hazardous materials sites
1/27/2016
databases, and potential waters of the U.S. for the approximately eight-
mile electrical distribution route from Nameless Substation to the
BCRUA Phase 2 pump station site. Summarize environmental
constraints within the subject area and identify any additional
investigations recommended for the proposed project.
Task 7.0 – Pump Station
Modify Task 7.3.5.1 as follows.
7.3.5.1 Complete a physical model study of the selected pump station design
by a specialty lab to evaluate if flow approaching the pumps meets
Hydraulic Institute Intake Design Standards. The study involves building
and operating a scale model of the pump station to evaluate the
hydraulic characteristics of design recommendations. Incorporate
additional testing of the smaller, initial (approximately 15 MGD) pumps
in the individual well shafts to the suction forebay to evaluate the
hydraulic characteristics of the smaller diameter pump and shroud in
the larger diameter pump well.
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ADDENDUM TO EXHIBIT C
WORK SCHEDULE
No changes to the overall Work Schedule are required.
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ADDENDUM TO EXHIBIT D
FEE SCHEDULE
The total compensation for services under Supplemental Agreement No. 4 is estimated
to be $29,700. Total compensation for the Phase 2 Deep Water Intake Preliminary
Design shall be adjusted to be $6,423,300.
Total compensation for Task 2.0 – Jurisdictional and Environmental Permitting Agency
Coordination shall be increased by an amount of $19,100. Total compensation for Task
2.0 – Jurisdictional and Environmental Permitting Agency Coordination (Paragraph
D1.01.A.2) shall be adjusted to be $318,500.
Total compensation for Task 7.0 – Pump Station shall be increased by an amount of
$10,600. Total compensation for Task 7.0 – Pump Station (Paragraph D1.01.A.6) shall be
adjusted to be $1,497,700.