ATT A Special Provisions and Specifications~32.pdf

ATTACHMENT A

SPECIAL PROVISONS & SPECIFICATIONS FOR

US101:MP281.85 BEARHEAD MOUTAIN LANE CULVERT PROJECT

SCOPE

The work to be completed under this Contract is located along the Oregon Pacific Coast Highway (US101) in Coos County, OR, which 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, complete.

2. Install and maintain temporary water management.

3. Install and maintain erosion control.

4. Clearing and grubbing as shown on the plans.

5. Install 86 lineal feet of 114 Inch (137 x 87) Arch Culvert Pipe (Agency Supplied).

6. Abandon and fill existing culvert.

7. Install stone Embankment protection.

8. Construct trench resurfacing.

9. Install fish rocks, type 2.

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

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) 315-5999 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.

Agency-Furnished Material – Add the following to the end of subsection 00160.30:

The Agency will furnish 114 Inch (137x87) Arch Culvert Pipe in 2 x 30’-0” long segments and 1 x 26’-0” segment. Contact Jessica Spann at 541-315-5999 to schedule the delivery of the Agency supplied culvert pipe a minimum of 14 days prior to installation. ODOT personnel must be present during delivery.

*�������5����� ���������� ��������� ����.��� 6����� �����#&��� 7����#��"�#���6�������8���������6��#���9�:����#���!����������������!���#��#��������������#����&!;��#����;��#�����<�����"%�=��������6�������8������������������������!"�'�����&�����'"��&���������%���6��#������>>?@>A�>>??>A�>>??@A�>>???A�>>??BA�>>??CA�>>?D>A�>>B>EA�>>B@>A�>>CF>A�>>G?>A�>>GC>A�>>HB>A�>>HCCA�>>DC?A�>@>B>A�>@>H>�����������������I7JKL�$L$M�<NJ7M�ONMP=$J��KQK7LKRL$�P8NJ�<$SP$6������������������

TUVWX�YZY[\Z]\Z]�_̂XY[XY]̀Z]aZZa

�4�

��� .��� 6����� �����#&����

7����#��"�#���6�������8���������6��#��������#���!����������������!���#��#��������������#����&!9��#����9��#�����#���:&����#%�;��������6�������8������������������������!"�'�����&�����'"��&���������%���6��#������<<==<>�<<=?<>�<<@??>�<<?A<>�<<?=<>�<<?@<>�<B<?<>�<B?A<>�<BC=<���������������������D7EFG�$G$:�HIE7:�JI:K;$E��FLF7GFMG$�K8IE�H$NK$6��������

OPOQRPSROS�TUVUWVOXYPZ[PP[

�4�

��� .��� 6����� �����#&������������ 7����#��"�#���6�������8���������6��#���9�:����#���!����������������!���#��#��������������#����&!;��#����;��#�����<�����"%�=��������6�������8������������������������!"�'�����&�����'"��&���������%���6��#������>>?@A�������������������B7CDE�$E$F�<GC7F�HGFI=$C��DJD7EDKE$�I8GC�<$LI$6��������������������

MNONPQRRS�TNOUVWXYXZ[Y\[Y]�X̂_̀a_Z]�bY\cYYc

�4�

��� .��� 6����� �����#&���������� 7����#��"�#���6�������8���������6��#���9�:����#���!����������������!���#��#��������������#����&!;��#����;��#�����<�����"%�=��������6�������8������������������������!"�'�����&�����'"��&���������%���6��#������>>?@>A�>>?BBA�>>?CB�������������������D7EFG�$G$H�<IE7H�JIHK=$E��FLF7GFMG$�K8IE�<$NK$6��������������������

OPQPRSTTU�VPQWXY Z[Z\][̂][̂�_̀a[baZb�c[̂d[[d

�4�

��� .��� 6����� �����#&���

7����#��"�#���6�������8���������6��#���9�:����#���!����������������!���#��#��������������#����&!;��#����;��#�����<�����"%�=��������6�������8������������������������!"�'�����&�����'"��&���������%���6��#������>>?@AB�>C>DC�������������������E7FGH�$H$I�<JF7I�KJIL=$F��GMG7HGNH$�L8JF�<$OL$6��������������������

PQRQSTUUV�WQRXYZ[\[]̂\_̂\_�̀]a[[abc�d\_e\\e

SECTION 00210 – MOBILIZATION

Comply with Section 00210 of the Standard Specifications.

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(s) to the end of the bullet list:

• During stage construction, provide continuous 24-hour flagger operation, with a minimum of two flaggers. Occupy the advance flagger stations, as directed.

• When an abrupt edge is created by excavation, protect traffic according to the "Excavation Abrupt Edge" and the "Typical Abrupt Edge Delineation" configurations shown on the Standard Drawings.

00220.40(e)(1) Closed Lanes - Replace this subsection, except for the subsection number and title, with the following:

Traffic Lanes may be closed on the Oregon Coast Highway US101. when allowed, shown, or directed during the following periods of time except as specified in 00220.40(e)(2):

Single Lane Closures – One Traffic Lane on the Oregon Coast Highway US101 may be closed during the following times:

• Daily, Monday through Thursday, between 7:00 a.m. and 4:00 p.m.

• Friday, between 7:00 a.m and 3:00 p.m

• September 5th Thru October 3rd o At all times

Add the following subsection:

00220.40(f) Limited Duration Road Closure - The Contractor will be permitted to close all Traffic Lanes for periods not to exceed 48 hours in duration during the culvert excavation and installation.

This Work will only be permitted between September 19th at 9:00 PM and September 21st at 9:00 PM on the Oregon Coast highway.

SECTION 00221 - COMMON PROVISIONS FOR WORK ZONE TRAFFIC CONTROL

Comply with Section 00221 of the Standard Specifications

SECTION 00222 – TEMPORARY TRAFFIC CONTROL SIGNS

Comply with Section 00222 of the Standard Specifications modified as follows:

00222.15(b) Portable Changeable Message Signs - Add the following paragraph to the end of this subsection:

00222.40(e) Temporary Sign Placement - Add the following to the end of the bullet list:

• Install a 54-inch "TRUCKS LEAVING HIGHWAY XXXX FT" sign in advance of each entrance point to the Work Area at sign spacing “A” from the “TCD Spacing Table” shown on the Standard Drawings. Install a 54-inch "TRUCKS ENTERING HIGHWAY XXXX FT" sign in advance of each exit point from the Work Area at sign spacing “A” from the “TCD Spacing Table” shown on the Standard Drawings.

• Install "ROAD WORK AHEAD" (W20-1-48) signs with a 36 by 24-inch "FINES DOUBLE"

(R2-6aP) rider on the Oregon Coast Highway, according to the "TCD Spacing Table" shown on the Standard Drawings or as modified by the Plans except do not install the "FINES DOUBLE" rider on concrete barrier mounted signs.

• Install beyond each end of the Project, facing outgoing traffic, an "END ROAD WORK"

(CG20-2A-24) sign a distance of (A ÷ 2) according to the "TCD Spacing Table" shown on the Standard Drawings or as modified by the Plans.

• For paving operations on non-freeways, place “ABRUPT EDGE” (CW21-9) and “ROAD

WORK XX MPH” (CW20-1a) signs as shown. Use an “XX” value equal to 10 mph below the current posted regulatory speed. If a speed is posted for a temporary regulatory speed reduction, that speed is the current posted regulatory speed.

• At least seven Calendar Days before the Road closure, place one or more PCMS displaying the following message as shown, or as directed:

Panel 1 Panel 2 (Oregon Coast HWY) CLOSURE (MP 281.85) (September 19) CLOSURE (September 21)

00222.80(a) Area Basis -

Add the following sentence to the end of the paragraph that begins "Temporary signs will…":

No measurement of quantities will be made for “CONSTRUCTION VEHICLE DO NOT FOLLOW” (CW23-14) signs.

Add the following sentence to the end of this subsection:

00222.90 Payment -

Add the following to the end of this subsection:

Payment will be made for not more than one set of Work Area signs. All additional sets of Work Area signs will be at no additional cost to the Agency.

Add the following to the end of this subsection:

No separate or additional payment will be made for furnishing, installing, and maintaining 72 by 24-inch "CONSTRUCTION VEHICLE DO NOT FOLLOW" (CW23-14) signs. Payment will be included in 00221.90(b).

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 00237 - AGENCY-PROVIDED STAGING AREAS

Section 00237, which is not a Standard Specification, is included in this Project by Special Provision.

Description

00237.00 Scope - This Work consists of utilizing Agency provided prospective or mandatory staging areas as the Contractor elects or as required for the construction of the Contract.

Locate staging area(s) in previously improved area(s) that have been paved or compacted and graveled, unless otherwise shown or approved.

00237.01 Prospective Staging Areas - If the Contractor elects not to utilize the listed prospective staging area(s) or elects to use other or additional staging areas, 00290.10 applies.

(a) Prospective Staging Area, _Tax Lot 1800____:

• Location - __________US101 / MP 283.4 (see plans title sheet)_________

• Access - __________1.5 miles south from project area on east side of US 101.

• Available Area - __________(2.5 acres)__________

If used, restore the site to preconstruction condition, as directed, by:

• Removing all imported construction materials including fabric, rock, excavated soils, combustible debris and other construction debris.

• Removing all solid waste and hazardous materials, including spills, and dispose properly

(b) Prospective Staging Area, _Tax Lot 1600____:

• Location - __________(US101 / MP 280.9)__________

• Access - __________North from project 1.0 mile on east side of US 101.

• Available Area - __________(1.0 acre)__________

If used, restore the site to preconstruction condition, as directed, by:

• Removing all imported construction materials including fabric, rock, excavated soils, combustible debris and other construction debris.

• Removing all solid waste and hazardous materials, including spills, and dispose properly

00237.40 General - All vehicles and Equipment, prior to entering the sites for the first time, and each subsequent time if the vehicle has left the Roadway outside the construction Project limits, shall be steam cleaned of all debris (soil, dirt, plant parts, and vegetative matter) before being brought back to the site. Notify the Engineer before moving each vehicle onto the site. Certify, in writing, that the Equipment has been steam cleaned.

00237.41 Restrictions and Protection of Resources - Comply with the following for all operations within the staging area operations:

• Protect cultural resources according to 00290.50.

• Protect migratory birds according to 00290.36(a).

00237.44 Staging Area Operations - The following apply during staging area operations:

• Develop a site-specific Pollution Control Plan for the staging area(s) according to 00290.30(b), and submit it to the Engineer at or before the pre-work meeting. In addition to the requirements of 00290.30(b) include the following in the Pollution Control Plan:

• For materials capable of causing water pollution if discharged, locate storage facilities in an area that prevents spillage into waterways or Wetlands.

• Provide, operate, and maintain wildland firefighting equipment appropriate for the current fire levels on-site at all times during all staging operations.

• To control dust, apply water to staging area access road(s) and staging operations.

00237.47 Staging Area Vacating - Before vacating the staging area(s) the following apply:

• Remove all structures, equipment, trash, and other construction debris including fabric, rock, excavated soils, combustible debris from the staging areas.

• Remove solid waste and hazardous material from the sites and dispose of properly. Provide documentary evidence of proper disposal and verify the amount of material removed.

• If a spill or dumping has occurred or if a spill or dumping is suspected to have occurred, 00290.20(3)(g) applies.

• Attend a post-work meeting at each staging area to evaluate staging areas rehabilitation work with the Engineer.

Measurement

00237.80 Measurement - No measurement of quantities will be made for Work performed under this Section.

00237.80 Measurement - No measurement of quantities will be made for Work performed under

Payment

00237.90 Payment - No separate or additional payment will be made for Work performed under

SECTION 00245 - TEMPORARY WATER MANAGEMENT

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

Description

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.

Construction

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.

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 ’C’ 107+50

Pipe ....................................................................... 200 Feet Plastic Sheeting ...........................................75 Square Yard

Sandbags ............................................................. 700 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 ‘C’ 107+50".

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 AND SEDIMENT 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 NPDES 1200-CA, 1200-CN, OR 1200-C 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.

00280.02 Definitions - Delete the definition Wet Season Work

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.

00280.48 Emergency Materials - Add the following paragraphs after the paragraph that begins "Provide, stockpile, and protect...":

Provide and stockpile the following emergency Materials on the Project Site:

Item Quantity

Sediment Barrier , Type 3 ...................................... 50 Feet

When emergency materials are used, restock emergency materials within 48 hours of use.

00280.62 Inspecting and Monitoring – Delete the paragraph that begins “Inspect the Project Site…”.

00280.62(a) Inspection - Replace the paragraph that begins "Perform site inspection, complete…" with the following paragraph:

Inspect the Project Site and all ESC devices for Effective Function and potential erosion or sediment movement and complete all applicable parts of the ODOT Erosion Control Monitoring Form, and submit the form to the Agency as follows:

00280.62(b) Rainfall – Add the following to the end of this subsection:

The closest on-line rain gauge is located at:

forecast.weather.gov/MapClick.php?lat=XX.XXXX&lon=- XXX.XXXX&unit=0&lg=english&FcstType=graphical

00280.91 Payment – Replace the paragraph that begins “Emergency Materials that are incorporated…” with the following paragraph:

Materials listed in 00280.48 that are incorporated into the Project will be paid for under the appropriate items listed in the Contract Schedule of Items.

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.

• 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.

• 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 15___ to __September 30___.

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:

Use heavy equipment as follows:

• 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.

(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.

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.

SECTION 00305 - CONSTRUCTION SURVEY WORK

Comply with Section 00305 of the Standard Specifications.

SECTION 00310 - REMOVAL OF STRUCTURES AND OBSTRUCTIONS

Comply with Section 00310 of the Standard Specifications.

SECTION 00330 - EARTHWORK

Comply with Section 00330 of the Standard Specifications modified as follows:

00330.03 Basis of Performance - Add the following paragraph to the end of this subsection:

Perform all earthwork under this Section except for stone embankment on the embankment basis.

SECTION 00350 - GEOSYNTHETIC INSTALLATION

Comply with Section 00350 of the Standard Specifications.

00350.01 Definitions - Add the following definition:

Geomembrane - An essentially impermeable geosynthetic composed of one or more synthetic sheets.

Replace the definition “Seam Type” with the following definition:

Seam Type - A designation of Geotextile positioning and rows of stitching in a specified sewn seam as shown (for example Type SSn-1, “J” Seam SSn-1). The designated method of joining Geomembrane sheets (for example thermal fusion welding, extrusion welding).

Add the following subsection:

00350.02 Submittals - Submit unstamped working drawings according to 00150.35. Include the geomembrane installation layout, details of field seams, treatment around penetrations and adjacent structures and anchor trench. Provide an installation layout to include geomembrane widths appropriate for the installation and to minimize field seams.

Submit equipment lists and other submittals according to 00150.37, include geomembrane handling, storage and installation procedures, equipment and personnel experience documents, and report of quality control testing.

00350.20 Field Seam Equipment - Replace this subsection, except for the subsection number and title, with the following:

Use field seaming equipment meeting the following requirements:

(a) Geotextile - Use field seam stitching Equipment that provides an acceptable lock-type stitch as recommended by the Geotextile manufacturer and approved by the Engineer.

(b) Geomembrane - Use thermal fusion welding Equipment for dual track field seaming as recommended by the Geomembrane manufacturer. Use extrusion welding equipment as recommended by the Geomembrane manufacturer at locations where thermal fusion welding is not possible, for example at patches, repairs, and short runs.

00350.30 Personnel Qualifications - Provide installer’s and seamer’s that have experience from at least five installations similar to Work in the Project. For each project, include the project name, location, year of construction, type and area of geomembrane installed, seam testing performed, owner’s contact name, and current phone number.

Add the following subsection:

00350.43 Geomembrane Liner Installation Requirements - Install geomembrane liner as shown or specified in the reviewed submittals, or as directed.

(a) Placement:

(1) Surface Preparation - Prepare and compact Subgrade and Soil fills with 3/4 inch maximum Aggregate as directed. Prior to installing the geomembrane, inspect the subgrade, remove all foreign matter and sharp, protruding or loose material that could penetrate or otherwise damage the geomembrane.

(2) Weather and Temperature Restrictions - Place geomembrane when the temperature is between 40 to 104 °F. Do not place geomembrane during the presence of excessive moisture or excessive winds as determined and directed by the Engineer.

(3) Inspection - During installation, visually inspect the geomembrane for imperfections, defects, holes, blisters, undispersed raw materials, and any sign of contamination by foreign matter. Mark and repair faulty or suspect areas.

(b) Seams - Overlap panels at least 2 feet and construct dual track thermal weld seam according to the manufacturer’s recommendations. For slope application, align geomembrane panels and seam parallel to the line of maximum slope and minimize cross slope seams.

Perform field quality control of seams according to 00350.43(f). Furnish test samples 1.5 feet long by 1 foot wide from the overlap with the seam centered in the sample.

(c) Cuts and Penetrations - Perform all cuts, welds and penetrations according to manufacturer’s specifications.

(d) Protection of Geomembrane - Protect the geomembrane at all times from ultraviolet (UV) rays, contamination by surface runoff and damage from construction equipment and activities. Use methods to unroll the panels that minimize wrinkles. Minimize direct contact by personnel, Equipment and tools with the fabric. Do not drive Equipment directly on the geomembrane. Ensure the area to be lined and the cover fill material is smooth and free of sharp material that could penetrate or otherwise damage the geomembrane. Place and spread

Aggregate over the geomembrane in a manner that prevents punctures, wrinkles, or other damage to the geomembrane.

(e) Edges - Secure edges of geomembrane using anchor trenches in Soil and attach geomembrane to Structures and around penetrations as shown or directed.

(f) Field Quality Control - Visually inspect all seams and non-seam areas of the geomembrane for defects, holes, blisters, undispersed raw materials, and any sign of contamination by foreign matter. Ensure the membrane is clean at the time of inspection.

Nondestructively test each suspect location in seam and non-seam areas as appropriate. Mark and repair each location that fails the nondestructive testing accordingly.

(1) Prequalification Seams - Each Day, prior to geomembrane seaming, perform a minimum 3-foot long prequalification seam by each welding technician and welding machine under the same conditions as the installation to determine proper seaming operation. Use geomembrane material from the same lot as the geomembrane to be installed.

(a) Nondestructive dual seam testing - Mark the date, ambient temperature, and welding machine identification for each prequalification test seam. Perform ASTM D5820 air channel test of the geomembrane dual track seam and use a threshold value of 4 psi pressure loss. Use ASTM D5820 Figure 1 report form for test documentation.

(b) Destructive seam testing for nonreinforced geomembrane seams produced using thermo-fusion methods - Cut samples, prepare specimens, perform peel and shear tests, and report results according to ASTM D6392 for each prequalification test seam. For each seam sample, cut, prepare, condition, and destructively test 5 specimens for peel strength and 5 for seam shear strength with a field tensometer.

Perform peel tests on both the inside and outside weld tracks. The evaluation criteria are shown in Table 00350-1a, Table 00350-1b, and Table 00350-1c by geomembrane polymer type and thickness. Four out of five test specimens are required to satisfy the evaluation criteria for both peel strength and shear strength, and five out of five test specimens are required to satisfy the peel separation evaluation criteria for successful prequalification. If necessary, repeat with a new prequalification seam until successful prequalification is achieved.

(2) Field Seam Non-destructive Testing - Perform non-destructive testing the full length of field seams as seaming progresses and before seams are covered. Mark each seam by number or other approved designation. Record and submit air channel pressure test for each seam; identify each seam by number, location, date, name of QC tester, and test result.

Perform ASTM D5820 air channel test on HDEP and LLDPE geomembrane dual track seams and a threshold value of 4 psi pressure loss. Use ASTM D5820 Figure 1 report form for test documentation.

Perform ASTM D7177 air channel test on PVC geomembrane dual track field seams.

(3) Field Seam Destructive Testing Location and Frequency:

Obtain a destructive seam test sample from the anchor trench end of each seam. Install a permanent patch over the test sample location and vacuum test all patches. Cut samples, prepare specimens, perform peel and shear tests, and report results according to ASTM D6392. For each seam sample, cut, prepare, condition, and destructively test five specimens for peel strength and five for seam shear strength with a field tensometer.

Perform peel tests on both the inside and outside weld tracks. Acceptance is based on four of five test specimens passing the stated criteria for both peel strength and shear strength, and five out of five test specimens passing for peel separation in Table 00350-1a, Table 00350-1b, or Table 00350-1c appropriate for the geomembrane polymer type and thickness.

The following procedures apply whenever a sample fails the field destructive test:

1. Cap strip the seam between the failed location and any passed test location.

2. Retrace the welding path to an intermediate location (a minimum of 10 feet from the location of the field test) and take a sample for an additional peel and shear tests as above. If four of five test specimens pass the stated criteria in Table 00350-1a, Table 00350-1b, or Table 00350-1c appropriate for the geomembrane polymer type and thickness, the sample qualifies, cap strip the seam between that location and the original failed location. If the test fails, the process is repeated.

3. Cut out the old seam over the length of seam failure, reposition the panel, and reseam or add a cap strip, as required.

Table 00350-1a Minimum HDPE Geomembrane Hot Wedge Seam Strength

Geomembrane Nominal Thickness 30 mils 40 mils 50 mils 60 mils Minimum Shear Strength, lb/in 57 80 100 120 Minimum Peel Strength, lb/in 45 60 76 91 Maximum Peel separation, % 25 25 25 25

Table 00350-1b Minimum LLDPE Geomembrane Hot Wedge Seam Strength

Minimum Shear Strength, lb/in 45 60 75 90 Minimum Peel Strength, lb/in 38 50 63 75 Maximum Peel separation, % 25 25 25 25

Table 00350-1c Minimum PVC Geomembrane Hot Wedge Seam Strength

Minimum Shear Strength, lb/in 58.4 77.6 92.8 109.6 Minimum Peel Strength, lb/in 18 18 18 18

(g) Repair of Geomembrane - Repair or replace all torn, punctured or contaminated geomembrane during construction at no additional cost to the Agency. Repair according to the following:

• Repair small holes by extrusion cap welding. Patch the hole if larger than 1/4 inch.

• Repair tears by patching. Round any tears located on a slope or an area of stress or with a sharp end prior to patching.

• Repair blisters, large holes, undispersed raw materials and contamination by foreign matter using patches.

• Abrade and clean no more than 15 minutes the surface of geomembrane prior to repair by patching. Remove no more than 10% of the thickness.

• Make all patches rounded or oval in shape, of the same membrane fabric, and extend a minimum of 6 inches beyond the edge of defects. Make all patches of the same compound and thickness as the membrane specified. Make all patches with their top edge beveled using an angle grinder prior to placement on the membrane. Apply all patches using approved methods only.

• Start the welding process by grinding the existing seaming and rewelding a new seam.

Begin welding where the grinding started, overlapping the previous seam by at least 2 inches. Do not reseam over an existing seam without regrinding.

• Nondestructively test each repair. Repairs passing the nondestructive test are considered adequate. Repeat and retest each repair that fails these nondestructive tests until the repair passes.

Provide daily documentation of all nondestructive and destructive. This documentation to identify all seams that initially failed the testing and include evidence these seams were repaired and successfully retested.

00350.90 Payment - Add the following Pay Item to the Pay Item list:

(g) Geomembrane Liner ................................................ Square Yard

Add the following paragraph after the paragraph that begins “Item (e) includes…”:

Item (g) includes all prequalification seams and testing, and all production seam testing and patches.

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

Comply with Section 00445 of the Standard Specifications modified as follows:

00445.00 Scope - This Work consists of installing Agency supplied Culvert Pipes, bands, and miscellaneous items required for connecting pipes in the locations shown or as directed to the lines and grades established. The Work includes constructing Joints, as necessary, for complete installation.

00445.10 Materials – Replace the first paragraph with the following:

Coordinate with the Engineer for delivery of the Agency supplied culvert pipe a minimum of 14 days prior to installation. 114 Inch (137x87) Arch Culvert Pipe will be supplied in 2 x 30’-0” long segments and 1 x 26’-0” segment.

00445.91 Payment – Add the following pay Item:

(n) Installing _____ Inch ____Pipe (Agency Supplied) ................................................ Foot

In item (n) the nominal pipe diameter will be inserted in the first blank. For arch type pipe, the nominal diameter of circular Metal pipe from which the pipe arch is formed, or reformed, will be inserted in the first blank. The type of pipe will be inserted in the second blank.

SECTION 00490 - WORK ON EXISTING SEWERS AND STRUCTURES

Comply with Section 00490 of the Standard Specifications.

SECTION 00510 - STRUCTURE EXCAVATION AND BACKFILL

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

00510.04(a) Defined Shoring Systems – Replace the sentence that begins “Select Shoring systems…” with the following sentence:

Select Shoring systems for construction from the list of defined Shoring systems provided in Section 16.3.26 of the ODOT GDM.

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)

137 x 87 Arch Pipe Culvert 870

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

The estimated quantity of granular structure backfill is:

Granular Structure Backfill Location (Cubic Yard)

137 x 87 Arch Pipe Culvert 209

SECTION 00530 - STEEL REINFORCEMENT FOR CONCRETE

Comply with Section 00530 of the Standard Specifications modified as follows:

00530.10 Materials - Replace this subsection, except for the subsection number and title, with the following:

Concrete Inserts ....................................................................... 02513.35 Deformed Bar Reinforcement .................................................. 02510.10 Deformed Bar Reinforcement (Stainless Steel) ....................... 02513.10 Dowels ..................................................................................... 02510.50 Dowels (Stainless Steel) .......................................................... 02513.50 Epoxy Coated Reinforcement .................................................. 02510.11 Galvanized Coating .................................................................. 02510.30 Headed Bar Reinforcement ...................................................... 02510.25 Mechanical Splices................................................................... 02510.20 Mechanical Splices (Stainless Steel) ....................................... 02513.20 Ties and Supports .................................................................... 02510.60 Ties and Supports (Stainless Steel) ......................................... 02513.60 Welded Wire Reinforcement .................................................... 02510.40

00530.41(a) Fabric - Replace this subsection with the following subsection:

00530.41(a) Welded Wire Reinforcement - If welded wire reinforcement is shipped in rolls, straighten it into flat sheets before placing.

00530.41(b) Ties and Supports – Replace the bullet that begins “When stainless steel rebar is specified…” with the following bullet:

• When stainless steel reinforcing is specified, use stainless steel ties and supports meeting the requirements of 02513.60.

Delete the bullet that begins “Tie stainless steel reinforcement …”.

Delete the bullet that begins “Support stainless steel reinforcement…”.

Replace the bullet that begins "Do not allow direct contact between stainless …" with the following bullet:

• Do not allow stainless steel reinforcement to directly contact ASTM A1035 CS reinforcement. Do not allow stainless steel reinforcement or ASTM A1035 CS reinforcement in direct contact with other reinforcement with a different type of metal. When stainless steel or ASTM A1035 CS reinforcing or dowels are located near other reinforcing with a different type of metal, use nylon or polyethylene spacers to maintain a minimum 1 inch clearance between the two metals and bind them with nylon cable ties. Where insufficient space exists to maintain this minimum, either bar may be sleeved with a continuous polyethylene or nylon tube extending at least 1 inch in each direction past the point of closest contact between the two dissimilar bars.

Add the following bullets to the end of the bullet list:

• When ASTM A1035 CS reinforcing is specified, use epoxy coated ties and supports meeting the requirements of 02510.60(a).

00530.43 Splicing Welded Wire Fabric – Replace this subsection with the following subsection:

00530.43 Splicing Welded Wire Reinforcement - Overlap sheets of welded wire reinforcement as shown or provide edge and end laps not less than one mesh in width. Securely fasten sheets at the ends and edges according to 00530.41.

00530.80(a) Lump Sum - Add the following to the end of this subsection:

The estimated quantity for uncoated reinforcement in pounds is:

Structure Number

Grade

24409

12000

00530.90 Payment - Replace this subsection, except for the subsection number and title, with

The accepted quantities of reinforcement will be paid for at the Contract unit price, per unit of measurement, for the following items:

Pay Item Unit of Measurement

(a)…