HomeMy WebLinkAboutResolution - 2018-R0065 - Texas Water Development Board - 02/08/2018Resolution No. 2018-R0065
Item No. 6.11
February 8, 2018
RESOLUTION
BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF LUBBOCK:
THAT the City Manager of the City of Lubbock is hereby authorized and directed to
execute for and on behalf of the City of Lubbock, an Amendment to an Interlocal Contract by
and between the City of Lubbock and the Texas Water Development Board for the volumetric
survey of Lake Alan Henry, and related documents. Said Contract is attached hereto and
incorporated in this Resolution as if fully set forth herein and shall be included in the minutes of
the Council.
Passed by the City Council this February 8, 2018.
�_Jv
DANIEL M. POPE, AYOR
ATTEST:
Rebe ca Garza, City Secret Uy
APPROVED AS TO CONTENT:
Aubrey Spear, P.g�Direct6r of Water Utilities
APPROVED AS TO FORM:
my , Deputy Cit ey
RES.Interlocal Contract Amended -Texas Water Development Board
(1-18-18)
Resolution No. 2018-R0065
STATE OF TEXAS
TRAVIS COUNTY
TWDB Contract No. 1748012105
TEXAS WATER DEVELOPMENT BOARD
AMENDMENT NO. 1
and
THE CITY OF LUBBOCK
This Contract and Agreement made and entered on June 1, 2017 is hereby amended as
follows:
ARTICLE V. TIME OF PERFORMANCE is replaced in its entirety as follows:
This Agreement is valid upon execution by both parties. The field survey
performed under this Agreement will commence on an agreed date with the initial
set-up activities necessary prior to actual conduct of the field survey by TWDB
staff. TWDB shall make all reasonable efforts to perform the field survey by
December 31, 2017, unless conditions of lake pool level, weather, or other
conditions beyond the TWDB's control, may delay the field survey work. TWDB
may commence the field survey three weeks prior to or following the stated date,
with three working days notice to the CITY. Should any rescheduling of the survey
be required outside of the period stated above, such schedule will be determined in
a mutually satisfactory manner within 60 days of the above stated period of field
performance or this Agreement will be terminated. The records and report
manuscripts resulting from this Agreement shall be completed and provided to the
CITY by the contract expiration date. This agreement shall expire October 31, 2018
2. ARTICLE X. TERMINATION is replaced in its entirety as follows:
The Agreement shall terminate upon the earlier of the completion of the Scope of
Services, incorporated as Attachment A or October 31, 2018 after the effective
date, unless extended by written agreement pursuant to Article VIII of this
Agreement. This Agreement may be terminated prior to full performance only by
30 days written notification by either party of this Agreement, and in all cases, the
non -terminating party shall be afforded an opportunity for consultation with the
terminating party prior to termination. In the event of breach of performance,
either party may terminate this Agreement by giving written notice to the other
party at least one (1) week prior to the date of termination.
ATTACHMENT A, SCOPE OF SERVICES, is replaced in its entirety as shown in
Exhibit A.
4. ARTICLE IV. COMPENSATION, is revised to add the language as follows:
TWDB Contract No. 1748012105
Amendment No. 1, Page 1 of 2
TWDB agrees to perform the tasks prescribed by this Agreement in consideration
for an amount not to exceed $44,247.00 to be paid by the CITY, as conditioned by
the terms of the Scope of Services incorporated into this Agreement as Attachment
A and as amended.
TWD13 has invoiced for 75% of the volumetric survey cost ($21,513.75). The
remaining 25% of the cost of the volumetric survey and the additional cost of the
sedimentation study will be invoiced upon completion of the survey report
($22,733.25). The total cost of the survey and report shall not exceed $44,247.00.
All other terms and conditions of TWDB Contract No. 1748012105 shall remain in
effect.
IN WITNESS WHEREOF the parties hereto cause this Contract and Agreement to be duly
executed in duplicate.
TEXAS WATER DEVELOPMENT BOARD
Jeff Wallger
Executive Administrator
DATE:
a-ko -Iq
ATTEST:
Rerca Garza, City Secret kn
APPROVES AS TO CONTENT:
CITY OF LUBBOCK
The Honorable Daniel M. Pope
Mayor
DATE: February 8, 2018
Aubrey A. SpeIP.E., Directbr of Water Utilities
APPROVED AS TO FORM:
my . Sims, puty Ci t ey
TWDB Contract No. 1748012105
Amendment No. 1, Page 2 of 2
*.14:1101II:1
REVISED ATTACHMENT A
SCOPE OF SERVICES
INTRODUCTION
The Texas Water Development Board (TWDB) proposes to perform a sedimentation survey
of Lake Alan Henry, Texas (LAKE). The purpose of this survey is to collect bathymetric data
to develop an updated elevation -area -capacity table. Sedimentation data will also be
collected to determine an estimate of accumulation and location. All maps generated from
this survey are related to this purpose, and the TWDB makes no representation or assumes
any liability if this information is used for any other purposes, such as boating maps.
The City of Lubbock (CITY) is the ultimate beneficiary of the data to be collected under this
study. The Hydrographic Survey program is a non-profit, user -funded program within the
TWDB. It was established to provide essential information at an affordable rate. In an effort
to keep costs to a minimum, basic needs were identified and are presented in the
Specifications section below. Should the CITY require analysis beyond that identified in the
basic contract, information can be provided at an additional cost as identified in the Budget
section.
LOCATION OF STUDY
The LAKE is located in Kent and Garza Counties on the South Fork of the Double Mountain
Fork of the Brazos River (Brazos River Basin), nine miles east of Justiceburg, Texas. The
City owns the water rights. The LAKE is owned and operated by the CITY. The LAKE has a
surface area of 2,741 acres at the conservation pool elevation of 2220.0 feet (NGVD29)
according to the 2005 TWDB survey.
SURVEY PLAN, SPECIFICATIONS, AND ANALYSES
Surface acreages will be based on Digital Orthophoto Quadrangles, if available. Positioning
on the lake surface will be established utilizing Differential Global Positioning System
(DGPS) with an estimated resolution of one meter or better. Survey data will be collected
from survey lines designed at no more than 500 feet spacing. These lines will be followed
to the extent possible as permitted by obstructions. Positioning and sounding data will be
collected and stored electronically at the rate of one measurement every second. TWDB
represents the accuracy of the area where data was collected. The model of the lake bottom
is mathematically interpolated between collected points by accepted engineering practices,
and is a mathematical estimate of the actual bottom.
TWDB Contract No. 1748012105
Exhibit A, Page 1of 4
Analyses of the survey data will include: (1) an elevation -area -capacity table of the lake,
acceptable to the Texas Commission on Environmental Quality, with definition of 0.1 feet;
(2) a bottom contour map with definition of 5 feet, depending on legibility; (3) a shaded
relief plot of the lake bottom; and (4) an estimate of sediment accumulation and location.
The TWDB will provide a copy of the report text and elevation -area -capacity table to the
CITY for review and comment prior to preparation of the final report. The CITY must
submit written comments on the draft report text and elevation -area -capacity table within
60 days of receipt. If no comments are received by the TWDB within 60 days from receipt
the TWDB may finalize the report. The TWDB will address any legitimate questions
regarding accuracy in writing within thirty days of receipt, and the TWDB will address the
comments in the final report. Two hard copies and one (1) electronic copy of the final
report will be provided to the CITY along with the digital data. Additional copies of the
reports will be provided at the cost of $50.00 per copy. All data from the survey will be
stored for future reference on TWDB computers and backup up on tape, CD or DVD.
The elevation -area -capacity table will be delivered as a Microsoft Office Excel spreadsheet.
A Triangulated Irregular Network (TIN) Model will be created using a mass points file, from
bathymetric data collected during the survey. All vertical data will be adjusted and
referenced to lake gage datum (USGS 08079700 Lk Alan Henry Res nrJusticeburg, TX). The
horizontal datum will be referenced to NAD83 State Plane, Texas North Central Zone. These
procedures will be described in the final report.
SURVEY SCHEDULE
The TWDB will schedule the field survey to begin on an agreed date after the contract has
been signed. The first day will be spent meeting the CITY representative, visually surveying
the lake conditions, and finding and checking the condition of boat ramps. The survey will
begin after the completion of these activities. Pool elevation, weather, and condition of
equipment are some of the possible factors that could affect the actual time of performing
the survey on the scheduled date.
The TWDB will contact the CITY, the week prior to the survey to confirm the proposed
dates. Confirmation by the CITY's representative will signify the CITY's approval that the
survey be conducted at the current lake elevation. If any delays are anticipated, the TWDB
will reschedule the survey as soon as possible. The new dates will be determined with the
approval of the CITY.
ON -SITE STORAGE
The CITY shall provide a secure locked enclosure for storage of the survey vessel(s) if the
TWDB deems necessary. The secured area may be a fenced enclosure. The enclosed,
secured structure will need a vertical clearance of sufficient height to allow storage of the
survey vessel(s) on its trailer, or approximately 12 feet. TWDB personnel traveling in
marked State vehicles should have unlimited access to the area during the performance of
the field survey.
TWDB Contract No. 1748012105
Exhibit A, Page 2of 4
COST ESTIMATE
a. Survey Cost. Standard charges for the cost of the survey and report are proposed as
lump sum fees in accordance with the recorded surface areas and the computed cost
shown in paragraph b. below. A contingency fee may be charged for navigational
hazards. The total survey cost shall not exceed $44,247.00.
b. Hydrographic Survey Program Cost Computation.
The Texas Water Development Board computes Standard Charges for Volumetric
Surveys utilizing the following formula:
Base Rate=-0.0000024 x (Area)2 + 1.40 x (Area) + $23,500
(Area is the surface area of the lake at conservation pool, in acres and Rate is the
proposed cost of the survey). The LAKE has a surface area of 2,741 acres at
elevation 2220.0 feet above msl. The estimated base rate is therefore $27,319.00.
The cost of the survey and report are proposed as lump sum fees in accordance with
the recorded surface areas and the standard rate schedule and represents the
typical charges for a "standardized" underwater bathymetric survey for a given size
lake and associated reporting of the findings. This standard charge schedule
assumes: a surface acreage of the lake at normal pool elevation; an underwater
bathymetric (volumetric) survey only; a 500-foot maximum width between the
surveying transects; acceptable weather conditions; no significant surface or sub-
surface obstructions to navigation; no unusual owner -induced delays once the field
mobilization and survey effort has been initiated; a coordination meeting with the
CITY's representative; and a standard survey report consisting of a description of
the lake and previously -known physical and storage conditions, description of the
hydrographic survey methodology, narrative and tabular descriptions of the newly
surveyed physical parameters of the lake bathymetry and storage capacity,
representative cross -sections of the lake survey, a two-dimensional contour map
and shaded relief plot of the lake bathymetry, and associated digital files of the
survey results.
A charge of 35% of the base rate, $9,562.00, will be added for collecting and
processing multi -frequency data as required for sedimentation surveys.
A flat rate of $6,000.00 is added for coring collection and analysis, a process used to
verify sedimentation data collection.
A contingency fee not to exceed 5% of the base rate, $1,366.00, may be charged for
navigational obstructions encountered during the field survey. These obstructions
such as submerged trees and vegetation, sand bars, marinas, boat docks and piers
delay the data collection process.
TWDB Contract No. 1748012105
Exhibit A, Page 3of 4
C.
Cost summa
Base rate (2,741 surface -acres) $27,319.00
Sedimentation data collection. analysis $9,562.00
Sediment coring and analysis $6,000.00
Contingences
Navigational obstructions (not to exceed) $1,366.00
Total $44,247.00
SUMMARY
Based on the above rate schedule, the maximum total cost of this survey will be $44,247.00
(including $1,366.00 contingency for navigational obstructions). The final cost analysis will
be conducted at the conclusion of the survey.
TWDB has invoiced for 75% of the volumetric survey cost ($21,513.75). The remaining
25% of the cost of the volumetric survey and the additional cost of the sedimentation study
($22,733.25) will be invoiced upon completion of the survey report. The total cost of the
survey and report shall not exceed $44,247.00.
TWDB Contract No. 1748012105
Exhibit A, Page 4of 4