HomeMy WebLinkAboutResolution - 2011-R0013 - Amendment To Agreement - HDR Engineering Inc. - 01/13/2011Resolution No. 2011-R0013
January 13, 2011
Item No. 5.18
RESOLUTION
BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF LUBBOCK:
THAT the Mayor of the City of Lubbock is hereby authorized and directed to
execute for and on behalf of the City of Lubbock, Amendment No. 1 to a certain
Professional Services Agreement executed on June 23, 2009, by and between the City of
Lubbock and HDR Engineering, Inc., and related documents. Said Amendment is
attached hereto and incorporated in this resolution as if fully set forth herein and shall be
included in the minutes of the City Council.
Passed by the City Council on January 13, 2011
TOM MARTIN, MAYOR
ATTEST:
. ' i
APPROVFD AS TO CONTENT:
M a Ad I J-- J�L-j
M rsha Reed, P.E., Chief Operarions Officer
vw:ccdocs/RES.Amendment #1 -HDR Engineering, Inc.
December 20, 2010
Resolution No. 2011-R0013
AMENDMENT No. 1
TO
PROFESSIONAL SERVICES AGREEMENT
This Amendment No. 1 to Professional Services Agreement ("Amendment") is entered into this
13th day of January, 2011, by and between the City of Lubbock (the "City"), a Texas home rule
municipal corporation, and HDR Engineering, Inc. (the "Engineer"), a Nebraska corporation.
WITNESSETH
WHEREAS, the City and Engineer entered into a certain Professional Services Agreement, dated
June 23, 2009, Resolution No. 2009-RO238 (the "Original Agreement"), wherein the City contracted
with Engineer to perform activities related to the planning, evaluating, permitting, designing,
constructing, and inspection of reservoirs and dams;
WHEREAS, it has come to the attention of City and Engineer that Phase 2 activities in the scope
of services of the Original Agreement are no longer desired by the parties; and
WHEREAS, the City and Engineer now desire to amend the Original Agreement to substitute a
revised scope of services that contemplates related, but originally unanticipated, work.
NOW, THEREFORE, for good and valuable consideration, the receipt and sufficiency of which
is hereby acknowledged, the City and Engineer agree as follows:
1. The attached "Amended Phase 2 Scope of Services, Task List, Proposed
Schedule, and Fee Estimate" is substituted for all Phase 2 Tasks, Summary of
Deliverables, and Project Schedule items listed and otherwise contained in
Exhibit "A" to the Original Agreement, in relevant and corresponding part.
2. The attached "Amended Phase 2 Scope of Services, Task list, Proposed Schedule,
and Fee Estimate" is substituted for all Fees and Compensation items specific to
Amendment No. 1 to Professional Services Agreement
City of Lubbock and HDR Engineering, Inc. Pagel of3
Phase 2 that are scheduled and otherwise contained in Exhibit `B" to the Original
Agreement, in relevant and corresponding part.
3. The Hourly Rate Schedule contained in the Original Agreement remains the same
for the attached "Amended Phase 2 Scope of Services, Task List, Proposed
Schedule, and Fee Estimate" to the extent a fee schedule shall be required to
calculate fees in connection with the revised Phase 2 activities.
4. All summaries, tasks, schedules, fees, deliverables, and other information specific
as to "Phase 2, Physical Inspections of McMillan & Ransom Canyon Dams"
listed or otherwise contained in Exhibits "A" and `B" of the Original Agreement
are deleted and of no further force and effect; provided, however, that provisions
contained in Exhibit "A" of the Original Agreement as to "Additional Services
and Detailed Investigations" are retained inasmuch as said services and tasks may
reasonably be applied to the substituted dams and projects set forth in the
"Amended Phase 2 Scope of Services, Task list, Proposed Schedule, and Fee
Estimate."
5. Except as amended hereby, all terms and conditions of the Original Agreement
shall remain valid and subsisting as originally provided.
IN WITNESS WHEREOF, the parties have executed this amendment by their duly authorized
representatives as of the date first written above.
HDR ENGINEERING, INC.
By: pvo
Name: Neil raff
Title: Senior Vice resident
Amendment No. 1 to Professional Services Agreement
City of Lubbock and HDR Engineering, Inc. Page 2 of 3
CITY OF LUBBOCK
Tom Martin, Mayor
I
APPROVED AS TO CONTENT:
mu I j ad- 0 Q Q J,
Marsha Reed, P.E.
Chief Operations Officer
Aubrey Spea. .E.
Director of Water Resources
Amendment No. 1 to Professional Services Agreement
City of Lubbock and HDR Engineering, Inc. Page 3 of 3
Resolution No. 2011—R0013
Amended Phase 2 Scope & Fees Page 1
Amended Phase 2
Scope of Services, Task List,
Schedule, Fees and Compensation
City of Lubbock, Texas
John T. Montford Dam and Existing Small Dams Breach Analyses and
Inundation mapping
Introduction
According to Title 30 of the Texas Administrative Code (TAC), Chapter 299, Dams and
Reservoirs, 299.61(b), all owners of significant and high hazard dams are required to
submit an Emergency Action Plan (EAP) to the Texas Commission on Environmental
Quality (TCEQ) by January 1, 2011. Accordingly, the City of Lubbock (City) had
requested from TCEQ information on dams owned by the City that are listed in the
TCEQ database. Based on the dam information provided, three City of Lubbock dams
are classified as either significant or high hazard and require an EAP. These dams are
listed in the table below with Texas Dam ID numbers.
Each EAP will require a breach analysis and inundation mapping. Per TCEQ rules and
guidelines, the "simplified" dam breach analysis may be used for existing small or
intermediate dams, and the "full" dam breach analysis is required for all large dams.
The City of Lubbock will be preparing an EAP for each dam. The City has requested that
HDR prepare a proposal to perform the dam breach analyses and inundation mapping that
is required for each EAP and coordinate with the City the information from the breach
analyses for each dam EAP document.
In addition, the City has requested a physical inspection of John T. Montford Dam (Lake
Alan Henry). The Scope of Services and Fees are as follows:
Breach
Dam
Hazard
Size
Analysis
Dam Name
ID No.
Classification
Classification
Method
John T. Montford Dam
TX06464
High
Large
Full
(Lake Alan Henry)
Canyon Lakes Project
TX04317
Significant
Small
Simplified
Dam No. 2
Canyon Lake Project
TX04786
Significant
Small
Simplified
Dam No. 3
The City of Lubbock will be preparing an EAP for each dam. The City has requested that
HDR prepare a proposal to perform the dam breach analyses and inundation mapping that
is required for each EAP and coordinate with the City the information from the breach
analyses for each dam EAP document.
In addition, the City has requested a physical inspection of John T. Montford Dam (Lake
Alan Henry). The Scope of Services and Fees are as follows:
Amended Phase 2 Scope & Fees Page 2
Task 1 Dam Breach Analysis and Inundation Mapping
HDR will perform dam breach analyses and inundation mapping in accordance with
TCEQ Dam Safety Guidelines for the dams listed above.
Task 1.1 John T. Montford Dam
1.1.1 Review previous hydrologic and hydraulic (H&H) analyses performed, if
available at TCEQ Central Records.
1.1.2 Perform site visit to verify hydrologic and hydraulic parameters, dam and
spillway configuration and geometry, and downstream development and
damage points.
1.1.3 Develop Hydrologic and Hydraulic (H&H) model of the watersheds for the
dam, and perform a probable maximum precipitation/flood (PMP/PMF)
analysis. The U.S. Army Corps of Engineers HEC -HMS or HEC -1 computer
model will be utilized to determine peak inflows to the reservoir and outflow
from the dam for the PMF event. A previous PMF analysis was performed in
the late 1990's for Lake Alan Henry. Hydrologic model information from that
previous analysis will be adopted and used for this analysis. The standards
utilized at the time of the previous analysis were somewhat more stringent
than the current standards promulgated in the January 2007 TCEQ
"Hydrologic & Hydraulic Guidelines for Dams in Texas" document.
Therefore, the results from an analysis incorporating the previous work will be
more conservative and will be acceptable to TCEQ for use in an EAP. If the
model data from the previous PMF analysis cannot be obtained in a useable
form or are inappropriate for use in this analysis, HDR will notify the City
that a new model needs to be developed. Development of a new PMF model
will constitute additional services and is not part of this scope.
Hydraulic modeling for the spillway discharge rating curve will be developed
using data from the existing PMF model, and elevation and dimension
information obtained from record drawings or survey data, if available, will be
used to confirm the previous analysis. The stage -storage relationship for the
conservation pool of the reservoir (up to elevation 2,220 feet) will be
determined from the volumetric survey of the reservoir completed by the
TWD13 in 2005. The stage -storage relationship for the flood pool above 2,220
feet will be computed using the best available data, which may be from
reservoir record drawings, the existing PMF analysis, or USGS 1:24,000 scale
topographic maps. If spillway data are not available, a field survey will be
required to determine the total spillway capacity. Field surveys will be
considered additional services and are not part of this scope.
1.1.4 Evaluate the hydraulic adequacy of the dam with respect to current TCEQ
hydrologic criteria for existing dams to determine if modifications will be
necessary to safely pass the design flood.
Amended Phase 2 Scope & Fees
Page 3
1.1.5 Perform breach analyses of the dam in accordance with the January 2007
TCEQ "Hydrologic & Hydraulic Guidelines for Dams in Texas" document.
The breach analysis will be performed using the TCEQ full breach method in
conjunction with the computed design flood hydrology from Task 1.1.3. The
dam breach and unsteady -state flow capabilities within HEC -RAS will be
used for dam breach and hydraulic modeling and inundation mapping. Two
dam failure scenarios will be evaluated as required by TCEQ guidance; 1)
sunny -day, and 2) design flood or barely overtopping breaches. The
hydrologic model developed under Task 1.3 will be used to provide the PMF
inflow hydrographs. Topographic data for the breach hydraulic modeling will
be obtained from USGS 1:24,000 scale topographic maps, unless more
accurate mapping is available. Flood profile water surface elevations will be
computed with HEC -RAS. Roughness coefficients for the HEC -RAS model
will be developed from aerial photography and field reconnaissance. The
HEC-GeoRAS software for ArcGIS® will be used to map inundation extents
based on the water surface elevations computed.
1.1.6 Prepare a draft and final report for the flood hydrology and hydraulic
modeling and breach analyses. This report will detail the various
methodologies used for computing rainfall distribution, initial losses and
infiltration, unit hydrograph development, and flow routings. The stage -
storage relationship for the lake, as well as the stage -discharge ratings for the
spillways, will be presented in tabular and graphical format. Inflow and
outflow hydrographs will be prepared for the design flood event. Breach
methodology and parameters and maps of inundated areas downstream of
each dam will also be included. The inundation maps will be provided to the
City for inclusion as an appendix to the EAP.
1.1.7 Coordinate dam breach results and inundation mapping information with the
City for use in the EAP for the dam.
1.1.8 Review the draft EAP developed by the City and provide review comments to
the City.
Task 1.2 Existing Small Dams
Except as noted otherwise below, the following dam breach analyses and EAP
preparation tasks will be performed for the two existing small dams:
1.2.1 Perform site visit to verify parameters, dam and spillway configuration and
geometry, and downstream development and damage points.
1.2.2 Perform breach analyses of each dam in accordance with the January 2007
TCEQ "Hydrologic & Hydraulic Guidelines for Dams in Texas" document.
Amended Phase 2 Scope & Fees
Page 4
Breach analyses will be performed using the TCEQ simplified breach method.
The simplified TCEQ discharge equations will be used along with steady-state
HEC -RAS hydraulic modeling for the simplified breach analyses and
inundation mapping. Topographic data for the breach hydraulic modeling will
be obtained from USGS 1:24,000 scale topographic maps, unless more
accurate mapping is available. Water surface elevations will be computed
with HEC -RAS. Roughness coefficients for the HEC -RAS model will be
developed from aerial photography and field reconnaissance.
1.2.3 Prepare a draft and final report for the breach analyses. This report will
describe the breach methodology and parameters and maps of inundated areas
downstream of each dam. The inundation maps will be provided to the City
for inclusion as an appendix to the EAP.
1.2.4 Coordinate dam breach results and inundation mapping information with the
City for use in the EAP for each dam.
1.2.5 Review the draft EAP developed by the City for each dam and provide review
comments to the City.
I
Task 2 Inspection of John T. Montford Dam
HDR performed an inspection of John T. Montford Dam on June 21-22, 2005, prior to
transfer of ownership of the project from the Brazos River Authority to the City. The
purpose of the inspection was to determine if there were any pre-existing conditions that
could threaten the safety of the dam or lead to major capital expenditures or increased
operations and maintenance costs. HDR's report on this inspection is dated August 9,
2005.
The City has requested that HDR perform a 5 -year follow-up inspection and prepare a
report documenting findings of the inspection. HDR proposes the following Scope of
Services to accomplish this objective:
2.1. Review existing project information including plans and specifications, as -
built drawings, photographs, previous inspection reports, instrumentation data
and reports, operation and maintenance (O&M) records, and emergency
action plan. The City shall make these items available to HDR for review at
the Project office the day prior to the inspection.
2.2. Prepare inspection plan and checklist;
2.3. Perform detailed, on-site visual inspection of dam and appurtenant structures;
2.4. Obtain photographic documentation of the inspection using a digital camera
having a resolution of 5 mega -pixels or higher.
Amended Phase 2 Scope & Fees Page 5
2.5. Prepare site plan drawing to serve as key map showing the location and
orientation of inspection photographs;
2.6. Review and make recommendations for updating the existing O&M manual
for the dam and appurtenant structures;
2.7. Develop recommendations for instrumentation monitoring and data collection
frequency;
2.8. Prepare a prioritized list of action items with recommended timeframes for
addressing each item;
2.9. Prepare Draft Inspection Report for City review. Provide two (2) copies of
Draft Report in black & white.
2.10. Finalize Inspection Report after receiving City's review comments. Provide
three (5) copies of Final Report in color. Provide electronic `PDF' file of
report and all inspection photographs on a CD.
2.11. A professional engineer registered in the state of Texas shall seal the Draft
and Final Inspection Reports.
Specific tasks that are not a part of this Scope of Services include, but are not necessarily
limited to, the following:
A. Geotechnical investigations and analyses;
B. Surveying;
C. Underwater inspections;
D. Inspection of confined spaces, such as intake towers, deep manholes and
outlet conduits;
E. Obtaining current readings of instrumentation devices;
F. Failure mode analyses and risk assessment;
G. Preparation of Emergency Action Plans; and
H. Design of dam or spillway improvements.
Amended Phase 2 Scope & Fees Page 6
SCHEDULE
HDR anticipates that draft reports can be provided to the City documenting the Work for
each dam within the following time periods:
Days After NTP
City Approval of Scope of Services: NTP
Task 1 — Dam Breach Analysis and Inundation Mapping
Task 1.1— John T.Montford Dam 120
Task 1.2 — Existing Small Dams (4 dams) 90
Task 2 — Inspection of John T. Montford Dam 60
FEES AND COMPENSATION
Fees (including per diem) for the Proposed Scope of Services are provided below. These
estimates are based on HDR's current understanding of current data availability and of
each dam without site visits or meetings with TCEQ Dam Safety Program staff.
Task 1— Dam Breach Analysis and Inundation Mapping
Task 1.1 — John T. Montford Dam $ 39,400
Task 1.2 — Existing Small Dams (2 dams):
• Canyon Lakes Project Dam No. 2 $ 22,300
• Canyon Lake Project Dam No. 3 $ 22,300
Task 2 — Physical Inspection of John T. Montford Dam $ 17,800
Total $ 101,800