HomeMy WebLinkAboutResolution - 5721 - Interlocal Agreement - TTI - Paved Street System Current Condition Study - 12_11_1997RESOLUTION NO.5721
Item #32
December 11, 1997
RESOLUTION
BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF LUBBOCK:
THAT the Mayor of the City of Lubbock BE and is hereby authorized and
directed to execute for and on behalf of the City of Lubbock an Interlocal Agreement by
and between the City of Lubbock and the Texas Transportation Institute for a Study to
Evaluate the Current Condition of the Paved Street System and Recommend a Long
Range Maintenance Strategy, attached herewith, and any associated documents, which
Agreement shall be spread upon the minutes of the Council and as spread upon the
minutes of this Council shall constitute and be a part of this Resolution as if fully
copied herein in detail.
Passed by the City Council this 11th day of December '1997.
ATTEST:
iNV6 4�
KaythQarnell, City Secretary
APPROVE AS TO CONTENT:
Don JeqAngs, Stroets Superintendent
APPROVED AS TO FORM:
D-odald G. V�
City Attorney
da/ccdocshtises
November 26, 1997
a
a
TEXAS TRANSPORTATION INSTITUTE
RESEARCH DEVELOPMENT Area Code 409
Telephone 845 -0449
FAX' 409.845.6966
November 25, 1997
Mr. Victor Kilman NOV 2 6
City of Lubbock 1997
P.O. Box 2000
1625 131 Street
Lubbock, TX 79457
ATTN: Don Vandiver
Re: TTI proposal #T98034, 'A Study to Evaluate the Current Condition of the Paved Street System
and Recommend a Long Range Maintenance Strategy'
Dear Mr. Kilman:
Attached are two (2) partially executed Interlocal Agreements between The Texas Transportation
Institute and The City of Lubbock. The changes have been made to the agreement as per Mr.
Don Vandiver's suggestion. Please return one fully executed copy to our office.
If additional information is required, please call me at 409/862-2256.
Sincerely,
Erlinda Olivarez
Proposal Coordinator
Attachments
cc: T. Freeman
File
THE TEXAS A&M UNIVERSITY SYSTEM • COLLEGE STATION, TEXAS 77843-3135
RESOLUTION NO. 5721
Item i132
December 11, 1997
INTERLOCAL AGREEMENT
between
THE TEXAS TRANSPORTATION INSTITUTE
and
THE CITY OF LUBBOCK
This agreement is made and entered into by and between the Texas Transportation Institute, a
government agency, hereinafter called TTI and the City of Lubbock.
TTI Responsibilities
Desired Results
As outlined in the Draft Scope of Proposed Work provided by the City of Lubbock, the following
are the tasks to be accomplished and our proposed approach to dealing with the issues involved. In
all phases of this proposed work, it should be understood that the long term success of this project
will depend on our working in cooperation with City of Lubbock staff. When we say that "... will
be created..." we mean that "In conjunction with the city staff... will be created..".
1. Using the current APWA PAVER information and any necessary visual inspections, evaluate
the current condition of the paved street system.
TTI proposes to upgrade the current City of Lubbock MicroPAVER database to the current
4.0, or 4.1 if it becomes available during the course of this contract. The newer version will allow
us and the City of Lubbock to take advantage of the increased capabilities, especially with respect
to the visual display of condition and performance data and trend analysis and will allow better
customization of the data to meet the needs of the city.
Curves representing the average actual performance (Family Curves) will be developed and
presented. These curves will be developed for the each of the major groups of pavement sections.
These major groups will include Pavement Rank (Residential, Collector, etc.), Surface Type (AC,
ST, etc.), and may include some geographic division like Zone or Section Category depending on
the performance of the pavements in those groups.
The preceding information will be used to evaluate the current and projected condition of city
streets. In conjunction with one of the site visits, we will conduct an audit of the PCI of a small
portion of the streets to ensure that condition surveys are being conducted as economically and
accurately as possible.
2. Although the current procedures/materials appear to be producing very favorable results,
evaluate these procedures/materials for possible ways to enhance their cost-effectiveness.
The effectiveness of the current maintenance and rehabilitation treatments, procedures,
timing, and materials will be evaluated. The effect of the condition of the pavement prior to
treatment has an important impact on the on the life and performance of a treatment. The type of
distress in the pavement prior to treatment can also have a large impact on the performance of the
treatment. Microsurfacing, for example, does not reduce the occurrence of cracking but rubber or
latex modified chip seals may reduce this cracking. An example of two of the family curves
developed by M in a TxDOT maintenance effectiveness experiment are shown below.
The impact on the effectiveness of the timing and type of treatment selected will be evaluated
based on data in the database, if possible, and from interviews with city personnel if the data does
not exist.
Recommendations for alternative treatments and/or materials will be provided, along with
usage guidelines for when they are appropriate. These alternative treatments will consider the
ultimate fatigue damage that the city streets will eventually experience if surface sealing is utilized
as the only treatment.
1vo
90
••
•
80 ' •
70 s
60 •
a 60
40 • Actual PCI
30 Predicted
PCl
20
10
a
Oct-90 Mar-92 Jul-93 Dec-94 Apr-96 Aug-97
Inspection Date
Figure 1. Example of Family Curve Development for Polymer Modified
Emulsion - Fair Initial Condition
iw
90
80
70
60
a 60
40
30
20
10
0
Oct-90 Aug-91 Jun-92 Apr-93 Feb-94 Dec-94 Sep-95 Jul-96 May-97
Date
Figure 2. PCI Performance Curves for Asphalt Rubber Modified Chip Seal
4
100
90
80
70
60
60
40
30
20
10
0 +--
Oct-90
Farr �,
Poor •
—good
— Fair
Aug-91 Jun-92 Apr-93 Feb-94 Dec-94 Sep-95 Jul-66 May-97
Date
Figure 3. PCI Performance Curves for Microsurfacing
3. Evaluate the cost-effectiveness of the current maintenance strategy, and recommend an
optimum annual funding and funding source for this current strategy.
Based on the current maintenance and rehabilitation strategy, an annual funding level to
accomplish a neutral funding level (no improvement in overall condition or backlog), a backlog
funding level (reduce or eliminate pavements in poor or worse condition), and an optimal life -cycle
cost funding level that would maintain the entire pavement network for the least total cost will be
developed.
We can survey our numerous contracts in other similar sized cities, especially in Texas, to
determine how they have been able to obtain funds for this type of work, or we can solicit assistance
from other personnel from within TTI.
4. Determine the future maintenance needs and present a long-range maintenance strategy,
including the following:
a. Detailed proposal of specific maintenance procedures and materials.
b. Recommend annual maintenance goals (such as square yards of seal coat area, etc.)
To accomplish the needs of the long range strategy.
c. The required annual funding and a recommended source (and alternative sources)
for the implementation of these maintenance procedures.
d. An implementation plan/schedule for the long range strategy.
The analysis required to complete the previous tasks will result in the answers to these and
other as yet unformulated questions. However, specific responses to these questions will be
generated.
TTI has been involved with identifying alternative sources for a variety of sources. The
applicability of these sources to the situation in the City of Lubbock will be investigated.
S. Prepare a comprehensive report summarizing the evaluation and recommendations of the
study, including the following.
a. A comprehensive evaluation of the current paved street system, including annual
maintenance and funding needs.
b. Evaluations and recommendations concerning the current maintenance practices.
c. A proposed long-range strategy, including an implementation plan with a proposed
schedule
d. An estimate of the life and life -cycle costs of both the current methods/materials and
those proposed in the long-range plan.
e. An evaluation of the impact of continuing the current maintenance procedures at the
current funding level.
f. An evaluation of the impact of continuing the current maintenance procedures at an
ideal annual funding level for projected future needs.
g. The additional funding required for all strategies (with cost/lane mile and total cost)
and recommended/possible funding sources with the probability of each source.
The analysis required to complete the previous tasks will result in the answers to these and
other as yet unformulated questions. However, specific responses to these questions will be
generated. The family curves discussed above will be used to determine, or estimate depending on
the data, the length of time a pavement can be maintained without major improvement. An analysis
of the long-term life cycle cost will be conducted, especially with respect to the replacement or
upgrading of high volume streets.
6. The consultant will prepare and provide five draft copies of the final report to the Street
Department stafffor review and possible revisions.
The report described here and all monthly progress reports will be submitted for review.
7. After approval of draft copy revisions, the consultant will provide twenty copies of the final
report to the Street Superintendent.
Twenty copies will be provided after all revisions to the report have been made.
8. The consultant, with the assistance of the city staff, will present a comprehensive summary
of the final report to the senior city staff and the city council.
We will make a formal presentation of the findings of this report to the city council.
However, we suggest that the city present portions of the report to the council in informal sessions
so that the council members can have a chance to review the contents and ask questions. Depending
on the timing of the meetings and the needs of the city, we can make this presentation or brief and
assist city staff in their preparations.
9. Monthly status reports, to include:
a. Current status
b. Work accomplished during the last month
c. Cost of the project to date
d. Projected completion date of all work
e. Projected total project costs.
This data will be readily available to the researchers who will prepare this report.
City of Lubbock Responsibilities
Compensation On or before the 1511 day of each new month, TTI shall submit to City of Lubbock
an invoice for payment for the previous month's installment. City of Lubbock shall reimburse TTI
according to monthly invoices based on work performed. The total cost of this project shall not
exceed $14,987. Such payments shall be made from current revenues available to the paying party.
The term of this Agreement shall commence on the date of its execution and will terminate on June
30, 1998.
This agreement embodies the complete agreement of the parties hereto relating to the matters
covered herein, and cannot be modified except by written amendment or supplemental agreement
of the parties. No interlocal agreement heretofore entered into between the parties shall be construed
to apply to the subject matter covered by this Agreement, and such other interlocal agreements shall
continue in full force and effect in accordance with their terms.
Executed this 11 th day of December , 1997, by TTI and City of Lubbock through their duly
authorized officials.
APPROVED BY TEXAS TRANSPORTATION INSTITUTE
By: �
Director
APPROVED BY THE CITY OF LUBBOCK
WINDY NITTON, MAYOR
ATTEST:
Ka arnell, City Secretary
APPROVED AS TO FORM:
D Vandiver, sst. City Attorney
ArP V S TO CONSENT:
Don Jenrffngs, Stre Superintendent