Exhibit A Special Provisions and Specifications.docx

ER 2025 I-5: SB MP 109.5 (SERPENTINE ROCKFALL) GABION WALL REPAIRS PROJECT

Exhibit A

SPECIAL PROVISONS & SPECIFICATIONS FOR

ER 2025 I-5: SB MP 109.5 (SERPENTINE ROCKFALL) GABION WALL REPAIRS PROJECT

SCOPE OF WORK TO BE DONE

The Work to be done under this Contract consists of supplying the materials, equipment, labor, and incidentals necessary to repair and realign the gabion wall damaged by rockfall near MP 109.5 SB along Interstate 5 (I-5). Perform additional and incidental work as noted in the Contract plans and specifications and as directed.

PROJECT INFORMATION

General information pertaining to this project may be obtained from the following Project Manager or approved representative:

Randy Camp, Transportation & Operations Maintenance Manager (TOMM) Email: Randy.CAMP@odot.oregon.gov Cell: (541) 580-2539

APPLICABLE STANDARD SPECIFICATIONS AND SPECIAL PROVISIONS

2024 OREGON STANDARD SPECIFICATIONS FOR CONSTRUCTION: The 2024 Oregon Standard Specifications for Construction (Standard Specifications) include detailed technical specifications in Parts 00200 through 03000 inclusive (Technical Specifications) that apply to this ITB and the resulting Contract. Some sections of the Technical Specifications are identified and modified herein, Specifications. Sections of the Technical Specifications not modified remain applicable to the Contract according to their original terms. Unless they are identified herein, Specifications, sections of the Standard Specifications in Part 00100 (General Conditions) are not applicable to this Contract. Bidders can also access this information at the following Internet address:

2024 OREGON STANDARD SPECIFICATIONS FOR CONSTRUCTION

Silence of Specifications: The apparent silence of the specifications as to any detail, or the apparent omission of a detailed description concerning any point, shall be regarded as meaning that the highest value commercial practices are to prevail and that only materials and workmanship of first quality are to be used.

Where neither the Special Provisions nor the bid schedule indicate separate payment for the work to be completed under this Contract, perform the work as incidental for which no separate measurement or payment will be made.

Location of Work to be done. I-5: SB MP 109.5 gabion wall repairs. See Figure 1 (next page) for additional details.

Figure 1 – approximate location of Work to be done, Repair Area 1 and Repair Area 2. Field-verify repairs with the TOMM prior to commencement of Work activities. Match dimensions of the existing gabion baskets.

Work to be done includes, but is not limited to, removal and replacement of damaged gabion baskets and panels including appurtenances (spiral binders, clips, etc.) within the existing gabion wall per Section 00596A, realigning gabion baskets within the wall displaced by the rockfall, refilling gabion baskets within the wall with existing gabion fill material (not from rockfall), ensuring all gabion baskets within the wall repair areas are properly filled by supplementing basket fill with material meeting the requirements of 00390.11(b), temporarily relocating concrete barrier (anchored) to facilitate gabion basket repairs and realignment, and installing 3 sections of concrete barrier (anchored) furnished by the Agency. See Scope of Work to be done (Page 1) for additional details.

The Agency will deliver 3 sections of concrete barrier including hardware to be added to the south end of the concrete barrier (anchored) sitting on top of gabion wall Repair Area 1. Schedule delivery of the concrete barrier with the Project Manager or approved representative.

Use of material from the rockfall will not be allowed to be used as gabion fill material as it contains naturally occurring asbestos and should not be handled.

SECTION 00210 - MOBILIZATION

Comply with Section 00210 of the Standard Specifications modified as follows:

Construction

00210.40 Mobilization – delete the last bullet of the bullet list. Obtaining and maintaining access to Doc Express® and using Doc Express® to submit documents will not be required on this project.

Payment

00210.90 Payment – delete the last sentence in this subsection.

SECTION 00220 - ACCOMMODATIONS FOR PUBLIC TRAFFIC

Comply with Section 00220 of the Standard Specifications.

SECTION 00221 - COMMON PROVISIONS FOR WORK ZONE TRAFFIC CONTROL

Comply with Section 00221 of the Standard Specifications modified as follows:

00221.00 Scope - Add the following:

Provide work zone traffic control measures conforming to The Oregon Department of Transportation’s Temporary Traffic Control Handbook for Operations of Three Days OR Less, December 2011. Copies of this handbook can be accessed via the internet under “Publications” on the Traffic Engineering and Operations Section web site (Highway Division, Oregon Department of Transportation) at:

2011 ODOT TEMPORARY TRAFFIC CONTROL HANDBOOK (OTTCH)

00221.06 - Traffic Control Plan – Replace this subsection, except for the subsection number and title, with the following:

The Contractor must submit a Traffic Control Plan (TCP) and a Temporary Pedestrian Accessible Route Plan (TPAR) and obtain approval from the Oregon Department of Transportation Project Manager before work may commence on the Project.

SECTION 00222 – TEMPORARY TRAFFIC CONTROL SIGNS

Comply with Section 00222 of the Standard Specifications.

SECTION 00223 - WORK ZONE TRAFFIC CONTROL LABOR AND VEHICLES

Comply with Section 00223 of the Standard Specifications.

SECTION 00224 - TEMPORARY TRAFFIC CHANNELIZING DEVICES

Comply with Section 00224 of the Standard Specifications.

SECTION 00228 - TEMPORARY PEDESTRIAN AND BICYCLIST ROUTING

Comply with Section 00228 of the Standard Specifications.

SECTION 00280 - EROSION AND SEDIMENT CONTROL

Comply with Section 00280 of the Standard Specifications.

SECTION 00290 - ENVIRONMENTAL PROTECTION

Comply with Section 00290 of the Standard Specifications modified as follows:

Add the following subsection:

00290.30(a)(7) Water Quality:

Do not discharge water contaminated by pollutants including sediment, drilling fluids and waste, concrete, grout, or water contained within a work area isolation, into any waters of the State or U.S. or conveyances draining thereto until it has been treated using Materials such as those listed in 00280.15 or 00280.16 or by pumping to a vegetated upland location. Do not allow Project discharges to increase the concentration of any pollutant in the receiving water to a level that exceeds the limits prescribed by OAR 340‑041.

Do not use permanent stormwater quality treatment facilities to treat construction runoff unless prescribed by an ESCP approved under Section 00280.

If construction discharge water is released using an outfall or diffuser port, do not exceed velocities more than 4 feet per second, and do not exceed an aperture size of 1 inch.

Implement containment measures adequate to prevent pollutants from entering waters of the State or U.S. Such pollutants include but are not limited to construction and demolition materials, waste spoils, fuel or petroleum products, detergents, silt, welding slag and grindings, concrete sawcutting by-products and sandblasting abrasives.

SECTION 00310 - REMOVAL OF STRUCTURES AND OBSTRUCTIONS

Comply with Section 00310 of the Standard Specifications.

SECTION 00390 – RIPRAP PROTECTION

Comply with Section 00390 of the Standard Specifications.

SECTION 00596A - MECHANICALLY STABILIZED EARTH RETAINING WALLS

Comply with Section 00596A of the Standard Specifications.

SECTION 00820 – CONCRETE BARRIER

Comply with Section 00820 of the Standard Specifications.

SECTION 02340 – ROCK GABION BASKETS

Comply with Section 02340 of the Standard Specifications.

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