HomeMy WebLinkAboutTaskOrder4KPFFBridgesKITTITAS COUNTY
DEPARTMENT OF PUBLIC WORKS
AGENDA STAFF REPORT
AGENDA DATE: June 20th, 2017
ACTION REQUESTED: Request to Approve the Chairman's Signature on Formal
Task Order Document Number 004 with KPFF Consulting
Engineers
BACKGROUND: The Federal Highway Administration (FHWA) issued a
memo on November 15, 2013 clarifying FHWA's position
on the analysis of Specialized Hauling Vehicles (SHVs)
during bridge load ratings to comply with the requirements
of the National Bridge Inspection Standards (NBIS).
The SHVs have the potential to create higher loading
effects, and thus result in lower load ratings for certain
bridges, especially those with a shorter span. SHVs are
newer closely -spaced multi -axle single unit trucks such as
dump trucks, construction vehicles, and solid waste trucks.
Load rating practices are being updated with these new
requirements to better evaluate the structural capacity of
bridges to account for modern trucking configurations
being utilized by many industries.
Public Works coordinated efforts with KPFF on call
Structural Engineering Consultants to identify bridges
within our inventory that require SHV load ratings. This
resulted in 48 bridges with load ratings to be completed by
December 31, 2017 and 52 bridges to be completed by
December 31, 2022.
Public Works has negotiated a Task Order with KPFF to
complete the first round of load ratings to comply with the
December 31, 2017 deadline in order to stay compliant
with the National Bridge Inspection Standards. The total
cost for these efforts is not to exceed $99,259.
Additionally, a new guideline for load rating structures for
Emergency vehicles was deployed November 3`d, 2016.
All future load ratings will include these design vehicles.
Public Works recently received its first load rating
including these emergency vehicles and was required to
post a load restriction for emergency vehicles on Railroad
Street in Easton. There is concern that more County owned
bridges may be required to be posted with load restrictions
for emergency vehicles.
The Emergency vehicle load ratings are required to be
completed prior to December 31", 2019. It is anticipated
that Public Works will proactively seek to complete the
SHVs due in 2022 within the 2018 and 2019 budget cycle
in order to load rate all bridges for both SHVs and
emergency vehicles during one effort within the most
restrictive timeframe.
INTERACTION: Public Works
RECOMMENDATION: Move to approve the Chairman's Signature on Formal Task
Order Document Number 004 with KPFF Consulting
Engineers
HANDLING: Return one (1) copy to Public Works
ATTACHMENTS: Formal Task Order Document Number 004
LEAD STAFF: Lucas Huck, County Engineer
BOARD OF COUNTY COMMISSIONERS
COUNTY OF KITTITAS
STATE OF WASHINGTON
RESOLUTION NO. 2017 -
TO AUTHORIZE THE CHAIRMAN'S SIGNATURE ON FORMAL TASK
ORDER DOCUMENT NUMBER 004 WITH KPFF CONSULTING ENGINEERS
WHEREAS: The Federal Highway Administration (FHWA) issued a memo on
November 15, 2013 clarifying FHWA's position on the analysis of
Specialized Hauling Vehicles (SHVs) during bridge load ratings to
comply with the requirements of the National Bridge Inspection Standards
(NBIS); and
WHEREAS: Kittitas County Public Works coordinated efforts with KPFF on call
Structural Engineering Consultants to identify bridges within our
inventory that require SHV load ratings; and
WHEREAS: FHWA established timelines to perform the associated load ratings
resulting in Kittitas County Public Works having 48 bridges with load
ratings to be completed by December 31, 2017 and 52 bridges to be
completed by December 31, 2022; and
WHEREAS: Kittitas County Public Works negotiated Task Order Number 004 with
KPFF Consulting Engineers to perform the required load rating efforts for
the 48 bridges prior to the December 31, 2017 deadline to maintain
compliance with NBIS; and
NOW, THEREFORE BE IT RESOLVED that the Board of County Commissioners, in
the best interest of the public, does hereby authorize the Chairman's
signature on Task Order Document Number 004 with KPFF Consulting
Engineers, as attached.
DATED on this 20th day of June, 2017, at Ellensburg, Washington.
Attest:
❑ Clerk of the Board- Julie Kjorsvik
❑ Deputy Clerk of the Board -Mandy Buchholz
BOARD OF COUNTY
COMMISSIONERS
KITTITAS COUNTY, WASHINGTON
Paul Jewell, Chairman
Laura Osiadacz, Vice -Chairman
Obie O'Brien, Commissioner
crsU'ors-_. to thE�
t
Oft
KI W ITns Coen n'
KITTITAS COUNTY
DEPARTMENT OF PUBLIC WORKS
Formal Task Order Document
(KPFF)
Task Order Number 004
Maximum Amount Payable $99,259 Completion Date
12/31/2017
The general provisions and clauses of Local Agency Agreement Number (KCPW 2017-
19ENG2) shall be in full force and effect for this Task Order.
Location of Project: All Kittitas County Bridges
Project Title: SHV Load Ratings
Description of Work: In accordance with FHWA direction for Load Rating of Specialized Hauling
Vehicles (SHV), Kittitas County is required by Federal and State mandates to update existing bridge load
ratings records with SHV load ratings on the appropriate schedule. The Consultant in Task Order 3
reviewed the County's bridge inventory and identified which bridges require updated load ratings by
12/31/17 and which ones need updated load ratings by 12/31/2022 using the WSDOT Load Rating Flow
Chart for Specialized Hauling Vehicles (Feb 2014). The Consultant concluded that the County has a total
of 114 NBIS bridges which are longer than 20 feet and thus are required to have a documented load
rating analysis or report on file. Forty-eight (48) of these bridges have been determined to require
updated load ratings in 2017. Thirty-six ( 36) of these will receive an Administrative Load Rating and
twelve (12) will be a Calculated Load Rating. A summary of the Task 3 effort is attached for reference.
ACalculated Load Rating is a load rating analysis in which sufficient structural details regarding the
primary superstructure components can be gleaned from either field measurements or historical
documents, such as bridge plans or calculations, to support direct and accurate structural analysis and
capacity determinations. The bridge's current condition is considered in the capacity reduction factor.
Calculated load ratings will follow procedures in the WSDOT BDM and AASHTO MBE. Each bridge will
receive a site visit by the Engineer to ensure the documented condition in the Inspection Report
conforms to the condition today based on the opinion of the Load Rating Engineer.
An Administrative Load Rating is performed only on concrete bridges where design, shop, or as -built
plans detailing the reinforcement do not exist. Steel and timber bridge structural components can be
LpSUDEs... TO 1HECo
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DEPARTMENT OF PUBLIC WORKS
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field measured and thus accurately load rated using industry standard analytical procedures. The goal
of an Administrative Load Rating is to provide the County with a Load Rating report for a bridge in which
calculations cannot be performed without extensive research regarding the structural details of the
bridge reinforcement and concrete strength. Since calculations cannot be performed, the engineer will
rely on the material found addressing the bridge's history, including dates of construction, relevant
design codes of that period, truck live load historical patterns of use, and level of distress as evaluated
by the Consultant during the Site Visit. The Consultant will also review previous Bridge Inspection
Reports, and repair/ retrofit records as made available to the Consultant by the County. The Consultant
will, based on evaluation of the accumulated data, make a judgment regarding the capacity of the bridge
to sustain current Legal Loads, the Notational Truck Load, and Specialized Hauling Vehicle Loads.
Administrative Load Ratings will follow the procedures established in Section 5.02 C of the WSDOT
Bridge Inspection Manual. These procedures are based on field evaluation and documented engineering
judgment.
A site visit will occur for each bridge to be load rated. This site visit is not an inspection; rather it is an
opportunity for the Engineer to field verify conclusions from the last Bridge Inspection and to arrive at a
consensus regarding how well the bridge has performed over the course of its service life. The Site visit
evaluation will be performed by two licensed engineers who are also WSDOT Certified Bridge Inspectors
with many years of design, load rating, and inspection experience. In general, rating factors for the SHV
and AASHTO legal trucks will be determined by the ratio of moment demands of the legal trucks
compared to the design truck or assumed design truck based on the historical documents.
A signed Load Rating Summary sheet will be provided for each bridge along with a memo that will
include photos, recent inspection report, calculations (if applicable).
In addition
• Assume all updates to WSBIS will be completed by County.
• County to determine if any bridges shall be load rated for Emergency Vehicles and provide any
additional truck axle configurations to be rated.
Cost Breakdown: See attached.
Agency Signature: -=;;2!f / Date:
/
Consultant Signature: (/ ZWV$,Wb k" Date: 06/07/17
dinner cee"es
dean CONSULTANT LINE ITEM COST ESTIMATE WORK SHEET
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