2019-06-10-minutes-public-works-study-session

Home Browse Search

tl Eo- IOTTITAS COUNTY x=z-r=TA� co DEPARTMENT OF PUBLIC WORKS Formal Task Order Document (KPFF) Task Order Number 018 Maximum Amount Payable $262,000 Completion Date 12/31/2020 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 (updated Load rating required by 2022) 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 previous Task Order 3 reviewed the County's bridge inventory and identified which bridges required 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). Forty-nine bridges will be updated to meet the 2022 FHWA mandate. A summary of County's NBI bridges which identifies which contract they are/were load rated under is included for reference. All of the bridges will be rated per the LRFR method per the AASHTO Manual for Bridge Evaluation (MBE) and the WSDOT BDM. Rating factors (RF) will be provided for the HL -93 design truck, AASHTO legal trucks, NRL (and SHV trucks if NRL < 1.0), WSDOT overload permit trucks OL -1 and OL -2 and emergency vehicles EV -2 and EV -3. The concrete bridges will be load rated using the WSDOT program BRIDG. The 3 sided box culverts will be rated using SAP (in order to account for the fixed slab to wall connection) for analysis and Excel for post processing. The steel bridges will be rated using SAP for analysis and Excel for post processing. The summary sheet will note if any posting is recommended.