Pages F-131 through F-132.pdf
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- Attached to
- OR DOT CRGNSA 100(4), Historic Columbia River Highway State Trail, Mitchell Point Crossing
- Solicitation number
- 69056720B000024
About this file
This document contains special contract requirements for a federal contract opportunity to provide temporary roadway rockfall protection systems for the OR DOT CRGNSA 100(4), Historic Columbia River Highway State Trail, Mitchell Point Crossing project. The contract requires furnishing, assembling, and utilizing Moveable Rockfall Barriers and Rock Containment Nets to construct temporary rockfall protection systems. The contractor must have experience installing similar systems and qualified personnel. The contractor must also submit experience documentation, temporary protection plans, monitoring and maintenance plans, and corrective measures at least 30 days prior to starting work. The special contract requirements specify design and performance criteria for the barriers and nets.
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Text version
F-131 DIVISION 600
Section 656. — TEMPORARY ROADWAY ROCKFALL
PROTECTION (ADDED SECTION)
08/01/14– FP-14
Description
656.01 This work consists of installing temporary roadway rockfall protection systems.
Material
656.02 Conform to the following Sections and Subsections:
709.03(d) 709.03(b) 710.13(a) 717.01(f) 710.13(b) 717.01(e) 710.13(d) 710.13(c) 725.25
709.03(b) 710.13(a) 717.01(f) 710.13(b) 725.13(b)
Construction Requirements
656.03 General. This work item consists of furnishing, assembling, and utilizing Moveable Rockfall Barriers (MRBs) and Rock Containment Nets (RCNs) for temporary roadway rockfall protection systems. A MRB consists of a moveable flexible rockfall barrier with a capacity of at least 74 foot-tons (ft-tons) that is mounted on steel plates. A RCN consists of draped rockfall protection fabric hung from a crane. Supply all materials, equipment, and labor necessary to construct each MRB and RCN in accordance with these Special Contract Requirements and as indicated in the Plans.
Systems visible from I-84, longer than 14 days in any 3 week period, require an approved dark earth tone (Federal Standard Color Number 300095 or similar).
Revised by Amendment A002
Special Contract Requirements Project: OR DOT CRGNSA 100(4), Historic Columbia River Highway State Trail, Mitchell Point Crossing
(a) Moveable Rockfall Barrier (MRB).
1/4-inch wire rope 5/8-inch wire rope Draped rockfall protection fabric Hardware High tensile strength fastener High-strength bolts, nuts and washers Posts Steel plates
(b) Rock Containment Net (RCN).
5/8-inch wire rope Draped rockfall protection fabric Hardware High tensile strength fastener Minor concrete Nonshrink Grout
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F-132 DIVISION 600
The Contractor may propose temporary roadway rockfall protection that is an approved equal to the MRB and RCN given herein. Do not use proposed temporary roadway rockfall protection alternatives unless accepted by the CO in writing. Requirements for proposed alternative temporary roadway rockfall protection are:
656.04 Qualifications. Provide an on-site supervisor and installation personnel with experience installing and testing the rockfall protection measures described below. Submit the following for approval at least 30 days before starting work:
656.05 Safety. Work site safety is the responsibility of the Contractor. Perform the work in a manner that minimizes exposure of the public, construction personnel, and equipment to hazardous and potentially hazardous conditions. Temporary rockfall mitigation measures, special designs, or installation procedures that the Contractor deems necessary to safely install the rockfall protection described below are the responsibility of the Contractor and will be implemented at the discretion of the Contractor and incidental to the respective unit contract prices.
656.06 Submittals. At least 30 days before starting the temporary roadway rockfall protection work, submit a work plan for approval according to Subsection 104.03. Include the following:
Revised by Amendment A002
Special Contract Requirements Project: OR DOT CRGNSA 100(4), Historic Columbia River Highway State Trail, Mitchell Point Crossing
(a) A 12-foot tall barrier with a minimum energy containment capacity of 74 foot-tons.
(b) A continuous suspended drape that extends at least 100 feet above the edge of pavement elevation in the active on-slope work area that is capable of intercepting trajectories and dissipating the energy of falling rock up to 1-foot diameter.
(c) Meet all requirements for protecting the traveling public from rockfall and do not represent additional hazard during construction as specified in the temporary roadway rockfall protection Special Contract Requirements and as indicated in the Plans.
(a) Names, contact information and roles of personnel; and
(b) A résumé for each individual describing their experience on at least 5 rockfall protection projects of similar complexity over the past 5 years. Include project names, locations, and contact information for project owners.
(a) A detailed description of the temporary roadway rockfall protection and any other protective measures, equipment, and procedures including:
(1) The number of MRBs and RCNs that will be used on the project.
(2) The corrective measures to be taken in the event of inadvertent loss of rockfall containment.
(3) How the temporary roadway rockfall protection measures, including the MRB(s) and RCN(s), will be monitored and assessed for effectiveness and maintained for the duration of the project.
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