Exhibit 1 Technical Specifications~11.pdf

ATTACHMENT A

SPECIAL PROVISONS & SPECIFICATIONS FOR

ESB OR241: MP 17.73 CULVERT REPLACEMENT PROJECT

SCOPE

The work to be completed under this Contract is located along Coos River Highway (OR241) at MP 17.73, in Coos County, OR consists of supplying the materials, equipment, labor and incidentals required to perform the following tasks as described in the Contract plans and specifications:

1. Provide Temporary Work Zone Traffic Control.

2. Construct Temporary Water Management Facilities.

3. Remove existing 24” CMP pipe.

4. Install 96” diameter 3”x1”, 10 gauge (0.135”) Aluminum Culvert Pipe.

5. Construct Riprap Protection (Class 50).

6. Install Culvert Drainage Markers.

7. Perform additional and incidental work as detailed in the Contract plans and specifications and as directed.

Utility Coordination – Ziply fiber will be relocating their utility line that currently conflicts with the culvert replacement. Coordinate work 10 calendar days prior to commencement of work activities. Contact information for Ziply Fiber is as follows:

Marc Carte, Network Engineer-OSP, Ziply Fiber Phone: 541-404-6284 Email: marc.cate@ziply.com

PROJECT INFORMATION

General information pertaining to this project may be obtained from the following:

Jessica Spann, Project Manager 307 Highway 42 Coquille, OR Phone: (541) 396-1143 Email: Jessica.SPANN@odot.state.or.us

APPLICABLE STANDARD SPECIFICATIONS AND SPECIAL PROVISIONS

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.

mailto:marc.cate@ziply.com mailto:Blake.W.Howren@ODOT.state.or.us

ESB OR241: MP17.73 CULVERT REPLACEMENT PROJECT

PROFESSIONAL OF RECORD CERTIFICATION

The following special provisions were prepared and/or reviewed by the Engineer whose professional seal appears below. These specifications are not valid unless the appropriate signed seal appears below and shall not be modified without the approval of the Engineer.

OREGON DEPARTMENT OF TRANSPORTATION SPECIAL

PROVISIONS

FOR

ESB OR241: MP 17.73 CULVERT REPLACEMENT PROJECT

PROFESSIONAL OF RECORD CERTIFICATION:

Seal w/signature

60211 PE

D• ·t II s· d 2024 07 05 191 a Y igne 10:31:18-07'00'

OREGON

RENEWS: 12-31-2025

I certify the Special Provision Section(s) listed below are applicable to the design for the subject project for Roadway.

Modified Special Provisions were prepared by me or under my supervision.

Sections 00245, 00390, 00445,00842,01091

FINAL ELECTRONIC DOCUMENT AVAILABLE UPON REQUEST

ESB OR241: MP 17.73 CULVERT REPLACEMENT PROJECT

PROFESSIONAL OF RECORD CERTIFICATION

The following special provisions were prepared and/or reviewed by the Engineer whose professional seal appears below. These specifications are not valid unless the appropriate signed seal appears below and shall not be modified without the approval of the Engineer.

OREGON DEPARTMENT OF TRANSPORTATION SPECIAL

PROVISIONS

FOR

ESB OR241: MP 17.73 CULVERT REPLACEMENT PROJECT

PROFESSIONAL OF RECORD CERTIFICATION:

Seal w/signature

56148PE

D• ·t II s· d 2024 07 03 191 a Y igne 16:28:57-07'00'

OREGON

RENEWS: 06-30-2025

I certify the Special Provision Sections listed below are applicable to the design for the subject project for Structural Culvert. Modified Special Provisions were prepared by me or under my supervision.

Sections 00280, 00310, 00405, 00495, & 00510

FINAL ELECTRONIC DOCUMENT AVAILABLE UPON REQUEST

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 modified as follows:

00220.02(a) General Requirements - Add the following bullet to the end of the bullet list:

• When performing trench excavation or other excavation across or adjacent to a Traffic Lane on a Roadway having a pre-construction posted speed greater than 35 mph, backfill the excavation, install Surfacing, and open the Roadway to traffic by the end of each work shift.

Install a "BUMP" (W8-1-48) sign approximately 100 feet before the backfilled area and a "ROUGH ROAD" (W8-8-48) sign approximately 500 feet ahead of the "BUMP" sign. If this requirement is not met, maintain all necessary lane or shoulder closures and provide additional TCM, including flagging, at no additional cost to the Agency. Do not use temporary steel plating to reopen the Roadway.

SECTION 00221 - COMMON PROVISIONS FOR WORK ZONE TRAFFIC CONTROL

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

Description

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, Errata Included (as of Sept. 2016). 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:

https://www.oregon.gov/odot/Engineering/Pages/OTTCH.aspx

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 00245 – TEMPORARY WATER MANAGEMENT FACILITY

Section 00245, which is not a Standard Specification, is included in this Project by Special Provision.

00245.00 Scope - This Work consists of furnishing, installing, operating, maintaining, and removing temporary water management facilities in regulated Work areas.

00245.01 Abbreviations:

TWM - Temporary Water Management TWMF - Temporary Water Management Facility TWMP - Temporary Water Management Plan

00245.02 Definitions:

Temporary Water Management Facility - A TWMF that conveys water around or through Work areas, removes water from Work areas, and treats and discharges water at locations outside Work areas.

00245.03 Temporary Water Management Plan - The Agency TWMP is a concept plan.

28 Calendar Days before beginning Work in regulated Work areas, submit stamped Working Drawings of a Contractor-developed TWMP, according to 00150.35, based on either the Agency’s concept plan or an independent plan that meets water quality and environmental guideline requirements and does not negatively affect neighboring properties or water rights.

Include the following minimum information in the TWMP:

• The sequence and schedule for dewatering and re-watering. This sequence and schedule must include when to contact the Engineer prior to dewatering and re-watering.

• How the Work area is isolated from the active stream flow upstream, through, and downstream.

• How the stream flow is routed and conveyed around or through the isolated Work area.

• How fish passage is provided around the Work area, if required.

• How the isolated Work area is de-watered.

• How the pumped water is treated, if necessary, before it is discharged downstream.

• Description of all construction stages, including appropriate contact points for each stage.

• A list of on-site backup Materials and Equipment.

• Provide the name of the TWM Subcontractor (if applicable) and Contractor’s superintendent, and their 24-hour contact phone number 10 Days before the pre-Work meeting. If changes in the appointment of the TWM Subcontractor or Contractor’s superintendent occur during the term of the Contract, provide written notice to the Engineer within 5 Calendar Days of the change.

• Calculations of water withdraw pump’s capacity.

• Details of the proposed water intake screen used to isolate in-water Work area and how it meets the requirements of 00290.34(c)(3).

Any change to the TWMP during construction requires approval prior to implementation.

Obtain the Engineer's written approval before beginning Work in in-water Work areas.

00245.04 Pre-Work Meeting - Before beginning any TWM Work, attend a pre-work meeting at the Project Site with the Engineer no more than 8 Calendar Days prior to implementation of TWM.

Required meeting attendees include:

• Engineer

• Contractor

• TWM Subcontractor (if applicable)

• Agency Environmental Coordinator or their appointed representative

The pre-Work meeting agenda typically includes the method of TWM, the TWMP, fish salvage plan and strategy, describe environmental risks, turbidity monitoring, energy dissipation, dewatering and re-watering plan and strategy, site clean-up expectations, and the circumstances under which contacting the Engineer is required.

Materials

00245.10 Materials - Furnish Materials meeting the following requirements:

Pipe ..................................................................... 00445.11 Plastic Sheeting ............................................... 00280.14(a) Sandbags ........................................................ 00280.15(a)

Water Intake Screening.................................... 00290.34(c)

Furnish pumps that are:

• Self-priming.

• Equipped with a variable speed governor.

• Equipped with a power source.

• Able to pump water that contains soft and hard solid.

00245.40 Fish Removal - Qualified Agency, ODFW, or ODOT consultant biologists will remove fish and other aquatic organisms from the isolation Work areas. Coordinate fish removal with the Engineer at least 28 Calendar Days before beginning Work in regulated Work areas. Allow access into the isolation Work areas before, during and after installation of the TWMF to perform the specified tasks as follows:

• Before Installation of TWMF - Before any in-water Work, including installing TWMF, qualified personnel will remove fish and other native aquatic organisms from within the proposed isolated Work area.

• After Installation of TWMF - After installing TWMF and the reduction of the water level through the isolated Work area has begun, qualified personnel will remove all fish and aquatic organisms as the water level is reduced. Do not completely de-water the isolation area until all fish and aquatic organisms have been removed.

00245.41 Installation - During installation of the temporary water management facility, maintain a downstream water flow rate of at least 50 percent of the upstream water flow rate.

00245.42 Operation - Operate temporary water management as follows:

• Protect fish and fish habitat according to 00290.34.

• Maintain and control water flow downstream of the isolated Work area for the duration of the diversion to prevent downstream de-watering.

• Clean, maintain and repair water intake screening to ensure adequate flows and protection of aquatic organisms.

• In the event of containment failure immediately notify the Engineer so arrangements can be made to remove fish and aquatic organisms from the isolation Work areas prior to the continuation of Work within the ordinary high water limits.

• When using a pump for bypassing water during temporary water management, physically monitor the pump in-person and maintain the pump at all times including non-work hours.

Provide a back-up pump on-site and ready for use as necessary. Provide the Engineer with a daily report documenting monitoring activities.

Maintenance

00245.60 Maintenance - Monitor water turbidity according to 00290.30(a)(8).

Finishing and Cleaning Up

00245.70 Removal - Prior to removal of the TWMF, obtain approval from the Engineer after completion of all Work within ordinary high water limits. Remove the TWMF and re-water and restore the stream flow. Maintain downstream water flow during removal of the facility. Staged or metered re-watering may be required and will be determined by the Engineer.

Measurement

00245.80 Measurement - No measurement of quantities will be made for temporary water management facilities.

The estimated quantities of Materials required for the temporary water management facility are:

Temporary Water Management Facility at Station _Sta 8+39.0:

Pipe ................................................................ __230_ Feet Plastic Sheeting ..................................... _30_ Square Yard Sandbags ...................................................... __275_ Each

The quantities of bypass pump monitoring will be measured on the time basis, of the actual number of Days the bypass pump is in operation and a daily monitoring report is received.

Turbidity monitoring will be measured according to 00290.80.

00245.90 Payment - The accepted quantities of temporary water management facilities will be paid for at the Contract lump sum amount for the item "Temporary Water Management Facility at Station _8+39.0_ ".

The location of the facility will be inserted in the blank.

The accepted quantities of bypass pump monitoring will be paid for at the Contract unit price, per Day, for the item “Bypass Pump Monitoring”.

Payment will be payment in full for furnishing and placing all Materials, and for furnishing all Equipment, labor, and Incidentals necessary to complete the Work as specified.

Turbidity monitoring will be paid for according to 00290.90.

No separate or additional payment will be made for TWMP, maintaining, operating, monitoring, moving, or removing the facility.

SECTION 00280 – EROSION CONTROL

Comply with Section 00280 of the Standard Specifications modified as follows:

00280.00 Scope - Replace the paragraph that begins "This Work also consists of providing temporary …" with the following paragraph:

This Work also consists of providing temporary erosion and sediment control (ESC) measures and furnishing, installing, moving, operating, maintaining, inspecting, and removing ESC throughout the Project area according to the Standard Drawings, the erosion and sediment control plan (ESCP), the Specifications, or as directed, until the site is permanently stabilized. Included also is the monitoring of weather, of stormwater and receiving waters, the reporting of monitoring observations, the reporting of corrective actions (when necessary) and the updates and revisions of the ESCP, including ESCP cover sheet, necessary to keep it representative of current site conditions and compliant with the 1200-CA permit if applicable.

Delete the paragraph that begins “When contaminants, pollutants or hazardous materials…”.

Add the following paragraph to the end of this subsection:

The Agency’s NPDES 1200-CA permit is not applicable to this Project. Comply with all applicable conditions of this Section.

00280.04 Erosion and Sediment Control Plan on Agency Controlled Lands - Replace the bullet that begins “Information required under 1200-CA…” with the following bullet:

• Information required under 1200-CA permit, if applicable.

00280.06 Erosion and Sediment Control Manager - Delete this subsection.

SECTION 00290 – ENVIRONMENTAL PROTECTION

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

00290.20(c)(2) Clean Fill - Add the following paragraph to the end of this subsection:

Manage all excavated soil that does not meet the definition of clean fill according to Section 00294.

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.

• 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.

• Do not allow curing concrete or grout to be submerged within waters of the State or U.S.

less than 24 hours after placement, except within work area isolation. Do not end-dump riprap into the waters of the State or U.S. Place riprap from above the ordinary high water line.

• Monitor weather and streamflow forecasts and conditions to anticipate high flows that may unintentionally inundate any portion of the Project Site.

• If high flow conditions occur or are anticipated to occur that may unintentionally inundate any portion of the Project Site, remove all potentially affected Equipment, Materials, and debris from the potential inundation area. Cease Work in the area until water recedes and the risk of further high water events passes. The Engineer retains the authority to temporarily halt or modify the Work in case of excessive turbidity or damage to natural resources.

• If Work in or around waters of the State or U.S.violate permit conditions or any requirement of this subsection, stop such Work and notify the Engineer.

00290.30(a)(8) Turbidity Monitoring - In addition to the requirements of 00280.62(c) to monitor the receiving stream to identify water quality issues, during Work in waters of the State or U.S., implement best management practices (BMPs) to minimize turbidity and monitor turbidity according to the following:

• Every four hours, make observations at an upcurrent location outside the influence of the

Project, and at a downcurrent location representative of turbidity caused by the Project.

• Document all turbidity monitoring observations including date, time, and location on form

734-2755, “Turbidity Monitoring Report” or another form approved by the Engineer. Submit reports to the Engineer weekly while working in waters of the State or U.S. and keep copies of the reports at the Project Site.

• A visible downcurrent turbidity plume emanating from the work area requires a presumption that project-caused turbidity is more than 10% above the upcurrent background level and is therefore in violation of DEQ’s turbidity water quality standard (OAR 340-041-0036), unless turbidity meter analyses of samples taken from an upcurrent location and from a location within the visible plume show that the actual turbidity increase is no more than 10% above the upcurrent background level.

• If observations indicate that the Project has increased turbidity to more than 10% above the upcurrent background level, modify work procedures and repair or upgrade BMPs. If turbidity is still more than 10% above the upcurrent background level at the next four-hour observation, stop turbidity-causing Work and repair or upgrade BMPs. Resume such Work when downcurrent turbidity returns to no more than 10% above the upcurrent background level.

00290.34 Protection of Fish and Fish Habitat - Add the following paragraph:

Meet with the Agency Biologist, Resource Representative, Engineer, and inspector on site, before moving equipment on-site or beginning any work, to ensure that all parties understand the locations of sensitive biological sites and the measures that are required to be taken to protect them.

00290.34(a) Regulated Work Areas - Add the following to the end of this subsection:

The regulated work area is defined as the area at or below the ordinary high water (OHW) elevation. The Engineer will identify and mark the regulated work area.

Perform work within the regulated work area only during the in-water work period. The in-water work period is from _July 1___ to __September 15__.

Submit a schedule to complete all work within the regulated work area within the in-water work period at least 10 Days prior to the preconstruction conference.

00290.34(c) Aquatic Species Protection Measures Required by Environmental Permits:

(1) General Requirements:

• Do not install fish ladders (for example: pool and weirs, vertical slots, fishways) or fish trapping systems.

Do not apply surface fertilizer within 50 feet of any stream channel.

Use heavy equipment as follows:

• Choice of equipment must have the least adverse effects on the environment (for example: minimally sized, low ground pressure).

• Secure absorbent material around all stationary power equipment (for example:

generators, cranes, drilling equipment) operated within 150 feet of wetlands, waters of the State, waters of the U. S., drainage ditches, or water quality facilities to prevent leaks, unless suitable containment is provided to prevent spills from entering waters of the State or waters of the U.S.

• Do not cross directly through a stream for construction access, unless shown or approved. If shown or approved, cross perpendicular to the stream and do not block stream flow. When a crossing is no longer needed, completely remove the crossing and restore the soils and vegetation to the original condition.

• Store fuel and maintain all equipment in staging areas that are at least 150 feet away from any waters of the State, waters of the U.S., or storm inlet or on an impervious surface that is isolated from any waters of the State, waters of the U.S., or storm inlet.

• If temporary access roads are needed within 150 feet of any body of water, use existing routes unless new routes are shown or approved.

• Before beginning work on temporary access routes that are not shown, submit a proposal to the Engineer for approval.

(2) Work Area Isolation - Provide work isolation according to Section 00245. Provide safe passage around or through the isolated work area for adult and juvenile migratory fish unless passage did not previously exist.

(3) Water Intake Screening - Install, operate, and maintain fish screens on each water intake used for project construction, including pumps used to isolate an in-water work area. When drawing or pumping water from any stream, protect fish by equipping intakes with screens having a minimum 27 percent open area and meeting the following requirements:

• Perforated plate openings shall be 3/32 inch or smaller.

• Mesh or woven wire screen openings shall be 3/32 inch or smaller in the narrowest direction.

• Profile bar screen or wedge wire openings shall be 1/16 inch or smaller in the narrow direction.

Choose size and position of screens to meet the following criteria in Table 00290-1:

Table 00290-1

Type Approach Velocity 1 (Ft./Sec.)

Sweeping Velocity 2 (Ft./Sec.)

Wetted Area of Screen (Sq. Ft.)

Comments

Ditch Screen ≤ 0.4 Shall exceed approach velocity

Divide max. water flow rate (cfs) by

0.4 fps

If screen is longer than 4 feet, angle 45° or less to stream flow

Screen with proven self-cleaning system ≤ 0.4 –

Divide max. water flow rate (cfs) by

0.4 fps

Screen with no cleaning system other than manual

≤ 0.2 – Divide max. water flow rate (cfs) by

0.2 fps

Pump rate 1 cfs or less

1 Velocity perpendicular to screen face at a distance of approximately 3 inches 2 Velocity parallel to screen

Provide ditch screens with a bypass system to transport fish safely and rapidly back to the stream.

(5) Site Restoration - Restore damaged streambanks to a natural slope, pattern, and profile suitable for establishment of permanent woody vegetation unless precluded by pre-project conditions (for example: natural rock substrate):

• Stabilize all disturbed soils, including obliteration of temporary access roads, following any break in work unless construction will resume in 4 Calendar Days.

(13) Temporary Power, Communication and Water Lines - Before installing temporary power, communication, or water lines across streams or bodies of water, submit a proposed plan to the Engineer for approval. Do not begin installation before receiving approval from the Engineer. Proposed plans for installation of temporary power, communication, and water lines and stream crossings shall utilize the following design methods in the listed order of priority:

1. Aerial lines, including lines hung from existing bridges.

2. Directional drilling, boring and jacking that spans the channel migration zone and any associated wetland.

3. Trenching, which is restricted to intermittent streams and may only be used when the stream is naturally dry. For all sections of trenches below the ordinary high water line, backfill with native material and cap with clean gravel suitable for fish use in the project area.

Align each crossing as perpendicular to the watercourse as possible. For drilled, bored, or jacked crossings, ensure that the line is below the total scour prism. Return any large wood displaced by trenching or plowing as nearly as possible to its original position, or otherwise arranged to restore habitat functions.

(14) Injured Fish Notification - If a dead or injured fish is found in the project area, immediately notify the Agency. If the injured fish is in a location where further injury or stress may take place, attempt to move the fish to a safer location, if one is available, near the capture site while keeping the fish in the water and reducing its stress as much as possible. Do not disturb the fish after it has been moved. If the fish is dead or dies while being captured or moved, save the fish and any tags. The Agency will notify appropriate regulatory agencies about the injured or dead fish and provide additional direction to the Contractor.

00290.36(a) Migratory Birds - Add the following to the end of this subsection:

(1) Bird Management - Bird management activities to comply with the Migratory Bird Treaty Act (16 U.S.C. 703 712) will be performed by the Agency. Ensure that the Agency and its permitted agents have access to the project area, as needed to prevent migratory bird nesting.

Nesting prevention may include daily bird harassment and the installation and maintenance of devices that exclude birds.

Do not disturb migratory bird nesting habitats (shrubs, trees, and structures), or clear vegetation from March 1 to September 1 of each calendar year without prior written approval from the Engineer. Notify the Engineer, in writing, a minimum of 10 Calendar Days prior to starting activities that could harm nesting birds.

00290.51 Protection of Sensitive Cultural Sites - Add the following to the end of this subsection:

An Inadvertent Discovery Plan (IDP) has been developed for this project. The IDP is available from the Engineer.

00290.90 Payment - Add the following paragraph(s) to the end of this subsection:

The accepted quantities of turbidity monitoring will be paid for at the Contract lump sum amount for the item "Turbidity Monitoring".

Payment for turbidity monitoring will be payment in full for furnishing and placing all Materials and for furnishing all Equipment, labor, and Incidentals necessary to complete the Work as specified.

No separate or additional payment will be made for work zone fencing.

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 00405 – TRENCH EXCAVATION, BEDDING, AND BACKFILL

Comply with Section 00405 of the Standard Specifications.

SECTION 00445 - SANITARY, STORM, CULVERT, SIPHON, AND IRRIGATION PIPE

Comply with Section 00445 of the Standard Specifications.

SECTION 00495 - TRENCH RESURFACING

Comply with Section 00495 of the Standard Specifications modified as follows:

00495.80 Measurement – Add the following bullet to the end of the bullet list:

• 72 inches for pipe of 96 inches in diameter.

SECTION 00510 - STRUCTURE EXCAVATION AND BACKFILL

Comply with Section 00510 of the Standard Specifications modified as follows:

00510.80(b)(1) Lump Sum - Add the following to the end of this subsection:

The estimated quantity of Structure excavation is:

Location Structure Excavation (Cubic Yard)

96 inch diameter culvert 180

SECTION 00842 - FACILITY IDENTIFICATION MARKERS

Comply with Section 00842 of the Standard Specifications.

SECTION 01030 - SEEDING

Comply with Section 01030 of the Standard Specifications modified as follows:

01030.13(f) Types of Seed Mixes - Add the following to the end of this subsection:

Provide the following seed mix formulas:

• _Permanent Seeding:

Botanical Name PLS Specified Rate (Common Name) (lb/acre) Achillea millefolium (White Yarrow) _4.0___ Bromus carinatus (California Brome) 5.0___ Danthonia californica (California Oatgrass) 4.0___ Deschampsia caespitosa (Tufted Hairgrass) 4.0___ Elymus glaucus (Blue Wildrye) 5.0____ Juncus effusus (Soft Rush) 2.0____ Juncus bufonius (Toad Rush) 1.0____ Lupinus rivularis (Riverbank lupine) 3.0____ Alnus rubra (Red alder) 3.0____ Regreen Sterile Wheat (Wheat x Wheatgrass hydrid) 10.0____

* Oregon Certified Seed

01030.15 Mulch - Add the following paragraph and bullets to the end of this subsection:

Furnish straw mulch for all temporary roadside erosion control seeding, except hydromulch may be used under the following conditions:

• Spring planting west of the Cascades between March 1 and May 15.

• Slopes are steeper than 1V to 1.5H and longer than 16 feet.

• Residential or commercial sites with low erosion potential such as sidewalk, Median, or parking lot planter strips.

Projects that have variable slopes may include straw mulch and hydromulch when approved.

SECTION 01091 - WATERWAY ENHANCEMENTS

Section 01091, which is not a Standard Specification, is included in this Project by Special Provision.

01091.00 Scope - This Work consists of constructing waterway enhancements such as fish Rocks, large woody Material (LWM), engineered streambed Material, and other types of waterway items as shown or directed.

01091.05 Pre-Work Meeting - Attend a pre-work meeting at the Project Site with the Engineer, at a mutually agreed upon time, at least 8 Calendar Days prior to implementation of any waterway enhancement work. Required attendees include:

• Engineer

• Contractor

• Waterway Enhancement Subcontractors

• ODOT Region Environmental Coordinator

• ODOT Hydraulics Designer

The pre-work meeting agenda typically includes the methods of accomplishing all phases of the waterway enhancement work, including:

• temporary water management (TWM)

• fish salvage plan and strategy

• environmental risks discussion

• turbidity monitoring

• energy dissipation

• dewatering and re-watering plan and strategy

• existing streambed Material salvage

• site clean-up expectations

• circumstances under which contacting the Engineer is required

Representatives from interested permitting agencies will be invited by the Agency.

Materials

01091.10 Material - Furnish Materials meeting the following requirements:

Streambed Gravels are classified as follows:

• Salvaged streambed Material

• Streambed Sand

• Streambed sediment

• Streambed Cobbles 4 in.

• Streambed Cobbles 6 in.

• Streambed Cobbles 8 in.

• Streambed Cobbles 10 in.

• Streambed Cobbles 12 in.

Provide a streambed Material mix of the following streambed Gravels with the associated ratios:

Engineered Streambed Material:

Salvaged streambed Material 10% by volume Streambed sediment: 15% by volume Streambed Cobbles 4 in. 10% by volume Streambed Sand: 15% by volume Loose Riprap, class 50: 50% by volume

Thoroughly blend streambed Gravels before placement. Acceptance of the Engineered Streambed Material will be based upon visual inspection by the Engineer.

Components of the salvaged streambed Material which meet the criteria for the specific Material may be used to supplement the streambed sediment and streambed Cobbles and will be based upon visual acceptance by the Engineer.

(a) Loose Riprap - Provide loose riprap meeting the requirements of Section 00390.

(b) Engineered Streambed Material - Provide uncrushed, free of deleterious Material, hard, durable Material that is well graded from the maximum size to the minimum size meeting the following test requirements for quality:

Aggregate Property Test Method Requirement Degradation Factor ODOT TM 208 15 min, L.A. Wear, 500 Rev. AASHTO T 96 50% max Bulk Specific Gravity ODOT TM 203 2.55 min.

• Streambed Sand: Grade Sand to meet the following requirements expressed as a percentage by weight:

Sieve

Percent Passing Natural Sand Manufactured Sand

Min. Max. Min. Max.

No. 4 99 100 99 100 No. 8 90 100 90 100 No. 16 60 90 60 90 No. 30 35 70 35 70 No. 50 10 30 20 40 No. 100 0 5 10 25 No. 200 0 3 0 10

• Streambed Sediment - Grade streambed sediments according to the following requirements expressed as a percentage by weight:

Sieve Size Percent Passing 2 1/2” square 100

2” square 65 - 100 1” square 50 - 85 U.S. No. 4 26 - 44

U.S. No. 40 16 max.

U.S. No. 200 5.0 - 9.0

• Streambed Cobbles - Grade streambed Cobbles according to the following requirements expressed as a percentage by weight:

Percent Passing Approx.

Size1 4”

Cobbles 6”

Cobbles 8”

Cobbles 10”

Cobbles 12”

Cobbles 12” 99-100 10” 99-100 70-90 8” 99-100 70-90 6” 99-100 70-90 5” 70-90 30-60 4” 99-100 30-60 3” 70-90 30-60 2” 30-60

1 1/2" 20-50 3/4" 10 max. 10 max. 10 max. 10 max. 10 max.

1Approximate size can be determined by taking the average dimension of the three axes of the Rock, length, width, and thickness, by use of the following calculation:

Length + Width + Thickness 3 = Approximate Size

Length is the longest axis, width is the second longest axis, and thickness is the shortest axis.

The grading of the Cobbles will be determined by the Engineer by visual inspection of the load before it is placed.

(c) Fish Rocks:

Type 1 - 700 pounds to 900 pounds size, hard, durable, angular shaped Rock. Furnish a single Rock with a thickness of not less than one-third its length. Round Rock, non-durable Rock, shale, or Rock with shale seams will not be accepted.

Type 2 - Greater than 900 pounds to 1,800 pounds size, hard, durable, angular shaped Rock. Furnish a single Rock with a thickness of not less than one-third its length. Round Rock, non-durable Rock, shale, or Rock with shale seams will not be accepted.

Type 3 - Greater than 1,800 pounds to 2,200 pounds size, hard, durable, subangular Rock.

Furnish a single Rock with a thickness of not less than three-fourths its length. Non-durable Rock, shale or Rock with shale seams will not be accepted.

01091.40 General - Obtain all permits and perform Work in and around water according to Section 00290, Section 00245 and the following:

(a) Streambed Excavation - Excavate the foundation for streambed Materials to the elevations and grades as shown. As directed by the Engineer, excavate scour holes in the approximate locations as shown.

(b) Salvaged Streambed Materials - During streambed excavation, salvage and stockpile the existing streambed Materials as directed for re-use.

(c) Loose Riprap - Place loose riprap Material within the stream channel as shown or as directed.

(d) Engineered Streambed Material - Place engineered streambed Material in the stream channel as shown or directed. Place the streambed Material in lifts no thicker than 12 inches.

Provide streambed Material in its final location with a well graded mix of streambed sediments and streambed Cobbles.

Construct streambed Material to ensure that low stream flows are conveyed above the finished channel. Pressure apply water to each placed layer to facilitate filling the interstitial voids of the streambed Materials with streambed Sand. The voids are satisfactorily filled when water equivalent to the flow rate of the stream does not go subsurface and there is visual acceptance by the Engineer. If water is not present in the stream, apply water to the stream channel for visual acceptance by the Engineer.

(e) Streambed Sand - Place streambed Sand in the streambed lifts as directed. Do not change the finished channel elevation or affect the channel shape as shown.

(f) Fish Rocks - Place Rocks as shown or as directed.

Measurement

01091.80 Measurement - No measurement of quantities will be made for Work performed under this Section.

The estimated quantities of Materials required for streambed enhancement are:

Item Quantity

Excavation .................................. .. __3__ cu. yd.

Loose riprap, Class 50 ................ ….._18_ cu. yd.

Salvaged Streambed Material .... ……._2_ cu. yd.

Engineered Streambed Materials….. _17_ cu. yd.

Fish Rocks, Type 2…………………... 7 each

01091.90 Payment - The accepted quantities of Work performed under this Section will be paid for at the Contract lump sum amount for the item “Streambed Enhancement”. Payment will be payment in full for furnishing and placing all Materials, and for furnishing all Equipment, labor, and Incidentals necessary to complete the Work as specified.