02_Project _ Standard Special Provisions_Hwy 9 Sidewalk Improvements_25946.pdf

Highway 9 Sidewalk Improvements Bid Date Town of Frisco April 22nd, 2024

COLORADO

DEPARTMENT OF TRANSPORTATION

SPECIAL PROVISIONS

HIGHWAY 9 SIDEWALK IMPROVEMENTS

The 2023 CDOT Standard Specifications for Road and Bridge Construction controls construction of this project.

The following special provisions supplement or modify the Standard Specifications and take precedence over the Standard Specifications and plans.

PROJECT SPECIAL PROVISIONS INDEX

Date Pages Index Pages (February 2024) 1-2 Disadvantaged Business Enterprise (DBE) Contract Goal (February 2024) 3 On the Job Training Contract Goal (February 2024) 4 Commencement and Completion of Work (Specified Completion Date) (February 2024) 5 Revision of Section 101 – Definitions and Terms (February 2024) 6-7 Revision of Section 106 – Control of Material (February 2024) 8-9 Revision of Section 202 – Removal of Structures and Obstructions (February 2024) 10 Revision of Section 203 – Excavation and Embankment (February 2024) 11 Revision of Section 206 – Structural Backfill (February 2024) 12 Revision of Section 207 – Topsoil (February 2024) 13-15 Revision of Section 212 – Seeding, Fertilizer, Soil Conditioner, and Sodding (February 2024) 16-17 Revision of Section 213 – Mulching (February 2024) 18 Revision of Section 240 – Protection of Migratory Birds (February 2024) 19-21 Revision of Section 304 – Aggregate Base Course (February 2024) 22 Revision of Section 504 – Modular Block Retaining Wall (February 2024) 23-25 Revision of Section 514 – Pedestrian and Bikeway Railing (February 2024) 26 Revision of Section 607 – Fences (February 2024) 27 Revision of Section 608 – Sidewalks and Bikeways (February 2024) 28 Revision of Section 625 – Construction Surveying (February 2024) 29-30 Revision of Section 630 – Construction Zone Traffic Control (February 2024) 31-33 Revision of Section 630 – Portable Message Sign Panel (February 2024) 35-35 Utilities (February 2024) 37-37 Force Account (February 2024) 40

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COLORADO

DEPARTMENT OF TRANSPORTATION

SPECIAL PROVISIONS

HIGHWAY 9 SIDEWALK IMPROVEMENTS

STANDARD SPECIAL PROVISIONS

Date No. of Pages Revision of Section 101 – Definitions and Section 106 - Control of Materials (January 8, 2024) 2 Revision of Sections 101 and 106 – Buy America and Build America, (January 8, 2024) 9 Buy America Requirements for Projects Containing $500,000 or more in Federal-Aid Highway Funding Revision of Section 105 – Control of Work (October 1, 2023) 1 Revision of Section 105 – E-Signature (January 8, 2024) 1 Revision of Section 105 – Dispute Review Board and Claims for Unresolved (October 1, 2023) 9 Disputes Revision of Section 107 – Water Quality Control (October 1, 2023) 9 (Under One Acre of Disturbance) Revision of Section 207 – Topsoil (October 1, 2023) 9 Revision of Section 208 – Erosion Control (Under One Acre of Disturbance) (October 1, 2023) 38 Revision of Section 212 – Soil Amendments, Seeding, and Sodding (October 1, 2023) 25 Revision of Section 601 – Structural Concrete (October 1, 2023) 5 Affirmative Action Requirements Equal Employment Opportunity (October 1, 2023) 13 Certified Payroll Requirements for Construction Contracts (October 1, 2023) 1 Disadvantaged Business Enterprise (DBE) Requirements (October 1, 2023) 15 Minimum Wages, Colorado, (January 5, 2024) 8 U.S. Department of Labor General Decision Number CO20240013, Highway Construction for Eagle, Garfield, Grand, Jackson, Lake, Moffat, Pitkin, Rio Blanco, Routt, and Summit counties.

On the Job Training (October 1, 2023) 6 Required Contract Provisions – Federal-Aid Construction Contracts (October 23, 2023) 15

DISADVANTAGED BUSINESS ENTERPRISE (DBE) CONTRACT GOAL

There is no DBE minimum participation required for the project.

ON THE JOB TRAINING CONTRACT GOAL

There is no minimum On the Job Training requirement.

COMMENCEMENT AND COMPLETION OF WORK

(SPECIFIED COMPLETION DATE)

The Contractor shall commence work under the contract beginning August 5th, 2024 and no later than August 16th, 2024, unless such time for beginning the work is changed by the Town Engineer in the Notice to Proceed. The Contractor shall substantially complete all work by September 23rd, 2024 and reach final completion by September 30th, 2024.

The Contractor’s progress schedule shall be a Critical Path Method schedule.

Salient features for this project are:

1. Mobilization and Ordering Long-Lead Time Materials

2. Install Portable Message Boards

3. Permits

4. Stormwater Management BMPs

5. Traffic Control: Traffic Control Plan Submittal/Approval/Installation/Maintenance for each phase

6. Potholing if required

7. Clearing and Grubbing and Demolition

8. Earthwork

9. Modular Block Retaining Wall

10. Pedestrian Rail Installation

11. Concrete Curb, Gutter, Sidewalk, Curb Ramp, and Asphalt Trail Installation

12. Install Delineators

13. Re-vegetation, Landscaping and Final Stabilization

14. Final Punch List

15. Clean-up and De-Mobilization

REVISION OF SECTION 101

DEFINITIONS AND TERMS

Section 101 of the Standard Specifications is hereby revised for this project as follows:

Section 101.02 is hereby revised as follows:

Whenever the following terms or pronouns are used in these specifications or in other contract documents, the intent and meaning shall be interpreted as follows:

Department. It shall be interpreted to mean Town of Frisco Engineering.

Engineer. It shall be interpreted to mean the Engineer, Town of Frisco or their designated representative.

Project Engineer. It shall be interpreted to mean:

The Chief Engineer’s duly authorized representative who may be a Town employee or an employee of a consulting engineer (consultant) under contract to Town as defined below:

(a) Town Project Engineer. The Town employee, assigned by the Resident Engineer, who is the Chief Engineer’s duly authorized representative. The Town Project Engineer is in direct charge of the work and is responsible for the administration and satisfactory completion of the project under contract.

(b) Consultant Project Engineer. The consultant employee under the responsible charge of the consultant’s Professional Engineer who is in direct charge of the work and is responsible for the administration and satisfactory completion of the project. The Consultant Project Engineer’s duties are delegated by the Town in accordance with the scope of work in the consultant’s contract with Town. The Consultant Project Engineer is not authorized to sign or approve Contract Modification Orders.

Insert these definitions as follows:

Addendum. A Supplement to any of the Contract Documents issued, in writing, after advertisement of but prior to the opening of bids for a contract.

Application for Payment. The form accepted by the Engineer which is to be used by Contractor in requesting progress or final payment and which is to include such supporting documentation as required by the Contract Documents.

Change Order. A written order issued by the Engineer to the Contractor to make changes in the work or to perform extra work and setting forth conditions for payment and/or adjustment in time of completion.

Contract. The written agreement between the Town and the Contractor setting forth the obligations of the parties, including, but not limited to, the performance of the work, the furnishing of labor and materials, and the basis of payment.

REVISION OF SECTION 101

DEFINITIONS AND TERMS

The “Contract” includes the Invitation for Bids, Bid Proposal, Bid Summary, Bid Schedules, Bid Bond, Addenda, Notice of Award, the signed version of the contract, performance and payment bonds, Certificates of Insurance (as required), Special Provisions, Project Special Provisions, Standard Special Provisions, Detailed Plans, Standard Plans, Supplemental Specifications, Standard Specifications, and Notice to Proceed; also included are any contract modification orders, permits and agreements that are required to complete the construction of the work in an acceptable manner, including authorized extensions thereof, all of which constitute one instrument.

Contract Modification Order. A written order issued to the Contractor by the Town covering contingencies, extra work, increases or decreases in contract quantities, and additions or alterations to the plans or specifications, within the scope of the Contract, and establishing the basis of payment and time adjustments for the work affected by the changes. The Contract Modification Order is the only method authorized for changing the Contract.

Contract Modification Orders must be approved as established in subsection 105.14.

Town: Town of Frisco, organized and existing under and by virtue of the laws of the State of Colorado. See Owner.

Department: Town of Frisco Public Works.

Director: Town Engineer for Town of Frisco, Colorado.

Holidays: Holidays recognized by Town of Frisco are:

New Year’s Day Martin Luther King, Jr. Day Presidents’ Day Memorial Day Independence Day Labor Day Columbus Day Veterans Day Thanksgiving Day Day after Thanksgiving Christmas Day Day after Christmas

When New Year’s Day, Independence Day, or Christmas Day fall on a Sunday, the following Monday shall be considered a holiday. When one of these days falls on a Saturday, the preceding Friday shall be considered a holiday. Additional legal holidays, when designated by the Governor of Colorado or the President of the United States, will also be recognized.

REVISION OF SECTION 106

CONTROL OF MATERIAL

Section 106 of the Standard Special Provisions is hereby revised for this project as follows:

The Town or Town’s representative will determine the sampling locations. The Contractor shall take the samples in the presence of the Town. The Town and Contractor may retain a split of each sample.

The Town will designate the sampling time, location, and sample size. The sampling will be conducted in the presence of the Town or designee.

REVISION OF SECTION 109

MEASUREMENT AND PAYMENT

Section 109 of the Standard Specifications is hereby revised for this project as follows:

Subsection 109.01 is hereby revised to include the following:

Water to be used on the project will not be measured or paid for but will be included in the work as needed.

REVISION OF SECTION 202

REMOVAL OF STRUCTURES AND OBSTRUCTIONS

Section 202 of the Standard Specifications is hereby revised for this project as follows:

Subsection 202.11 is hereby revised to include the following:

Removal of Gravel will not be measured but will be included in the Clearing and Grubbing pay item.

Existing asphalt pavement is to be protected in place and any repairs needed to any adjacent asphalt shall be borne by the contractor at their expense.

Removal of Tree includes full removal and disposal of each tree specified for demolition on the plans or as directed by the Town or Engineer, including removal of stumps to a minimum 12” below finished grade. Tree removal will not be measured but will be included in the Clearing and Grubbing pay item.

Removal of Delineator includes full removal and disposal of each delineator and base, regardless of material type, specified for demolition on the plans.

Removal of Curb Ramp and Removal of Sidewalk will be measured and paid for by the square yard of concrete removed and disposed of as verified by the Engineer, regardless of depth as specified on the plans. For the curb ramp removal, this includes the truncated dome area.

Removal of Curb and Gutter will be measured and paid for by the actual linear footage of existing concrete removed and disposed of as defined in the plans and as measured along the flow line.

Removal of Fence will be measured and paid for by the actual linear footage of existing fence removed.

Removal of Wall will not be measured but will be paid for by lump sum of the wall to be removed as defined in the plans regardless of height, size, or material encountered. This work also includes any foundations associated with the wall to be removed, which will not be paid for separately. Removed boulders shall be hauled and stockpiled by the Contractor at the Town of Frisco’s “Boneyard” located near the intersection of Recreation Way and SH 9. Hauling and stockpiling is incidental to the cost.

Tree Trimming will not be measured and paid for separately but will be included in the Clearing and Grubbing pay item. The Contractor shall trim all trees so pedestrians and bicyclists can safely use the trails and pathways without impediment as directed by the Town or the Engineer.

Subsection 202.12 is hereby revised to include the following:

Payment will be made under:

Pay Item Pay Unit Removal of Delineator Each Removal of Curb Ramp Square Yard Removal of Sidewalk Square Yard Removal of Curb and Gutter Linear Foot Removal of Fence Linear Foot Removal of Wall Lump Sum

REVISION OF SECTION 203

EXCAVATION AND EMBANKMENT

Section 203 of the Standard Specifications is hereby revised for this project as follows:

Subsection 203.11 shall include the following:

Unclassified Excavation (CIP) and Embankment (CIP) to be paid for by volume will not be re-measured, but payment will be based on the quantity identified in the bid tabulation, unless the quantity is changed during construction by Change Order or when it is determined that there are discrepancies on the plans in an amount of at least plus or minus 15% of the plan quantity. Unclassified Excavation (CIP) will remain on site to be used in areas where fill is needed. Embankment (CIP) includes all excavated material generated on site and reused for embankment, as well as material hauled from an outside source to the site to complete the fill areas. This work includes all grading activities in cut and fill areas as defined on the plans, regardless of the number of times a contractor moves the dirt or stockpiles the cut, fill, or imported volumes. Any excess excavated material and unsuitable materials shall be hauled and stockpiled by the Contractor at the Town’s “Boneyard” located near the intersection of Recreation Way and SH 9. Stumps, roots, limbs, shrubs, hazardous materials, and any other materials rejected by the Town shall be hauled and disposed of by the Contractor at a suitable disposal site.

The Contractor shall be responsible for verifying existing cross sections prior to construction and identifying any discrepancies and shall notify the Engineer. Failure to do so indicates acceptance of the existing ground line as shown in the cross sections and quantities.

If provided in the plans, the compaction factor is an approximation, and it is the Contractor’s responsibility to construct the project to the lines and grades as shown on the plans. Additional embankment and excavation may be necessary and shall include import, export or hauling required to complete the work.

Reconditioning will not be measured and paid for separately. Any over-excavation completed without prior approval of the Engineer will not be measured and paid.

Subsection 203.11 (d) shall be deleted and replaced with the following:

Blading and dozing will not be paid separately, but will be included in the cost of embankment material.

Subsection 203.11 (f) shall be deleted and replaced with the following:

Proof Rolling will not be paid separately, but will be included in the cost of embankment material.

Subsection 203.12 is hereby revised to include the following:

Blading, dozing, and proof rolling shall not be measured and paid separately but shall be included in the cost of embankment material.

The accepted quantities will be paid for at the unit bid price for each pay item listed below. Payment will be made under:

Pay Item Pay Unit Unclassified Excavation (Complete in Place) Cubic Yard Embankment (Complete in Place) Cubic Yard

REVISION OF SECTION 206

STRUCTURAL BACKFILL

Section 206 of the Standard Specifications is hereby revised for this project as follows:

Subsection 206.06 (b) shall be deleted and replaced with the following:

Structure Backfill (Class 1) for wall construction will be measured and paid for per plan quantity.

REVISION OF SECTION 207

TOPSOIL

Section 207 of the Standard Specifications is hereby deleted for this project and replaced as follows:

DESCRIPTION

Subsection 207.01 shall include the following:

This work includes requirements for furnishing, stripping, stockpiling, and placing topsoil in the disturbed area and/or previously prepared subgrade within the project limits. Stripped topsoil may be re-used for this site, but additional topsoil is anticipated to be needed and imported from a Contractor’s approved source.

(a) Definitions

1. Finish Grade: Elevation of finished surface of planting soil.

2. Manufactured Topsoil: Soil produced off-site by homogeneously blending mineral soils or sand with stabilized organic soil amendments to produce topsoil or planting soil.

3. Pesticide: A substance or mixture intended for preventing, destroying, repelling, or mitigating a pest.

This includes insecticides, miticides, herbicides, fungicides, rodenticides, and molluscicides. It also includes substances or mixtures intended for use as a plant regulator, defoliant, or desiccant.

4. Planting Area: Areas to be planted.

5. Planting Soil: Standardized topsoil; existing, native surface topsoil; existing, in-place surface soil;

imported topsoil; or manufactured topsoil that is modified with soil amendments and perhaps fertilizers to produce a soil mixture best for plant growth.

6. Subgrade: Surface or elevation of subsoil remaining after excavation is complete, or the top surface of a fill or backfill before planting soil is placed.

7. Subsoil: All soil beneath the topsoil layer of the soil profile and typified by the lack of organic matter and soil organisms.

(b) Submittals. Soil Analysis Report: See Quality Control.

(c) Delivery, Storage, and Handling

1. Do not deliver or place topsoil in a frozen, wet, or muddy condition.

2. Protect stored and placed topsoil from vehicular traffic, equipment storage, material storage, or from contaminants or pollution sources. Topsoil that is compacted or tainted during construction is to be removed from site and disposed of at a licensed landfill at no additional cost to the Town.

MATERIALS

Subsection 207.02 shall include the following:

The material for topsoil shall conform to the following:

(a) Topsoil to be amended with Biotic soil amendments at a rate of 3500 pounds per acre applied hydraulically.

(b) Onsite Topsoil. Topsoil previously stripped and stockpiled prior to earthwork operations. Salvaged topsoil shall be stockpiled at locations designated or approved by the Project Manager in a manner that will facilitate measurement, minimize sediment damage, and not obstruct natural drainage.

CONSTRUCTION REQUIREMENTS

Subsection 207.03 shall include the following:

This section provides standards and guidelines for the examination, placement, protection, and repair of topsoil for this project.

(a) Examination

1. Examine areas where the work of this Section will be performed for compliance with requirements and conditions affecting installation and performance.

A. Verify that no foreign or deleterious material or liquid such as paint, paint washout, concrete slurry, concrete layers or chunks, cement, plaster, oils, gasoline, diesel fuel, paint thinner, turpentine, tar, roofing compound, or acid has been deposited in soil within the work area.

B. Verify that final grades are completed in accordance with the Contract Drawings.

2. Proceed with installation only after unsatisfactory conditions have been corrected and approved by Project Manager.

3. Topsoil shall be free from weeds, sod, and material larger than 1-inch (1”), toxic substances, litter or other deleterious material. Spread evenly and grade to elevations and slopes shown on Contract Drawings.

Hand rake areas inaccessible to machine grading.

4. Utilize salvaged topsoil as the top layer to the extent available. If sufficient on-site material is not available, the Contractor shall furnish and install imported topsoil in the manner described above. Topsoil shall be mixed thoroughly with the salvaged topsoil prior to placement.

(b) Protection and Repair. Protect completed areas where topsoil has been spread from traffic which will compact the soil volume. Any areas that, as determined by Project Manager, become compacted due to Contractor’s construction traffic shall be reconstructed to specified requirements and approved by Project Manager.

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METHOD OF MEASUREMENT

Subsection 207.04 shall include the following:

Measurement will be made of the actual cubic yards of topsoil placed, completed and accepted at the locations shown on the Contract Drawings or as directed by the Project Manager, and in accordance with the Specifications.

BASIS OF PAYMENT

Subsection 207.05 shall include the following:

Payment shall be made at the unit price bid and shall include all materials (including topsoil amendments), labor and equipment required for furnishing/importing, stripping, stockpiling and placing of topsoil, excavation, loading, transporting, re-transporting to new locations (from onsite or off site stockpiles), spreading to specified depth, disposing of unusable materials, hauling off, watering, dust control, erosion and sediment control, and finish grading required to bring the site to the required lines and grades in accordance with the Contract Drawings and Specifications.

Payment will be made under:

Pay Item Pay Unit Topsoil Cubic Yard

REVISION OF SECTION 212

SEEDING, FERTILIZER, SOIL CONDITIONER, AND SODDING

Section 212 of the Standard Specifications is hereby revised for this project as follows:

Subsection 212.01 shall include the following:

This work consists of the furnishing and installation of seeding (native) at the locations shown on plans.

Subsection 212.02 shall override with the following:

(a) Native Seed Seed shall have been prepared for seeding during the year of installation and shall have been stored away from high heat (over 100 degrees F). Seed will be furnished in sealed, unopened, standard containers and labeled in accordance with the USDA Rules and Regulations and the Federal Seed Act. Seed will be fresh, clean, pure live seed equal in quality to the standards for “Certified Seed”. Seed tags must be supplied to the Parks & Recreation Director or designee for all seed mixtures, showing overall quantities and species. The Town at the Contractor’s expense may require tests of seed verification.

Refer to plans set for seed mix.

(b) Fertilizer

Native seeded areas shall receive an application of 200 pounds per acre of Humate following seeding and before mulching.

Subsection 212.06 shall include the following:

(d) Hydraulic Seeding Native seed to by hydraulically applied.

The seeder will be equipped with a satisfactory feeding mechanism, an agitator, double disc furrow openers, depth bands and packer wheels. Seed will be sown to a depth of one- quarter (¼) inch into a properly prepared seedbed.

Seed drilling will be done in two (2) separate applications crossing the area at right angles to one another to guarantee proper coverage. On sloping land, the final seeding operation will follow the general contour. All seeded areas will be top-dressed with hydro-mulch after the seeding is completed.

Seeded areas will be mulched with twenty-five hundred (2,500) pounds per acre hydromulch immediately following seeding. Hydromulch must include one hundred and fifty (150) pounds per acre organic tackifier. At this rate soil coverage is 100%. Any thin areas in the mulch, where soil is visible, will be cause for a request to reapply mulch until the coverage is satisfactory, at the Contractor’s expense. If weather conditions deteriorate, Contractor will delay work until conditions improve. Mulch must be applied in a separate operation on the same day as seeding.

No hay will be permitted on the construction site for any purpose.

REVISION OF SECTION 212

SEEDING, FERTILIZER, SOIL CONDITIONER, AND SODDING

Remove all hydromulch from all plant materials, fences, concrete and other areas except for seed bed. Overly dense applications of straw mulch, or windrows of loose straw mulch which may smother seedling grasses, must be collected and removed. Straw mulch blown offsite during the construction and warranty period onto any adjacent area must be collected and removed by the landscape Contractor responsible for the project.

Subsection 212.08 shall include the following:

Fertilizer and Biotic Amendments (and any other soil conditioning) will not be itemized separately, but are included in the unit price of seeding (native).

Payment will be made under:

Seeding (Native) Acre

REVISION OF SECTION 213

MULCHING

Section 213 of the Standard Specifications is hereby revised for this project as follows:

Subsection 213.02 shall also include the following:

(a) Mulch Hydraulic Hydro-mulch: Hydro-mulch shall be a wood cellulose fiber type and shall be applied at the minimum rate of two thousand five hundred (2,500) pounds per acre with a minimum rate of one hundred and fifty (150) pounds per acre tackifier and shall be applied immediately after seed application.

Straw: Straw consisting of 75% straws longer than 10 inches may be used on native seeding. It shall be applied evenly over the seeded surface at the minimum rate of two tons per acre and partially embedded into the soil using a crimper or similar implement. Due to the potential for wind-blown straw, hydromulch shall be required in native seeded areas close to occupied or neighboring buildings.

Subsection 213.05 shall include the following:

The accepted quantities of mulching should be paid for at the contract unit price.

Payment will be made under:

Mulching (Hydraulic) Acre

SECTION 240

PROTECTION OF MIGRATORY BIRDS BIOLOGICAL

WORK PERFORMED BY THE CONTRACTOR’S BIOLOGIST

Add Section 240 to the Standard Specifications for this project as follows:

240.01 This work consists of protecting migratory birds during construction.

MATERIALS AND CONSTRUCTION REQUIREMENTS

240.02 The Contractor shall schedule clearing and grubbing operations and work on structures to avoid taking (pursue, hunt, take, capture, or kill; attempt to take, capture, kill or possess) migratory birds protected by the Migratory Bird Treaty Act (MBTA). The Contractor shall retain a qualified wildlife biologist for this project. The wildlife biologist shall have a minimum of three years’ experience conducting migratory bird surveys and implementing the requirements of the MBTA. The Contractor shall submit documentation of the biologist's education and experience to the Engineer for acceptance. A biologist with less experience may be used by the Contractor subject to the approval of the Engineer based on review of the biologist's qualifications.

The wildlife biologist shall record the location of each protected nest, bird species, the protection method used, and the date installed. A copy of these records shall be submitted to the Engineer.

(a) Vegetation Removal. When possible, vegetation shall be cleared before the time when active nests are present.

Vegetation removal activities shall be timed to avoid the migratory bird breeding season which begins on April 1 and runs to August 31. All areas scheduled for clearing and grubbing between April 1 and August 31 shall first be surveyed within the work limits for active migratory bird nests. The Contractor's wildlife biologist shall also survey for active migratory bird nests within 50 feet outside work limits. Contractor personnel shall enter areas outside CDOT right of way only if a written, signed document granting permission to enter the property has been obtained from the property owner. The Contractor shall document all denials of permission to enter property. The Contractor shall avoid all active migratory bird nests. The Contractor shall avoid the area within 50 feet of the active nests or the area within the distance recommended by the biologist until all nests within that area have become inactive. Inactive nest removal and other necessary measures shall be incorporated into the work as follows:

1. Tree and Shrub Removal or Trimming. Tree and shrub removal or trimming shall occur before April 1 or after August 31 if possible. If tree and shrub removal or trimming will occur between April 1 and August 31, a survey for active nests shall be conducted by the wildlife biologist within the seven days immediately before the beginning of work in each area of tree and shrub removal or trimming.

The survey shall be conducted for each phase of tree and shrub removal or trimming. If an active nest containing eggs or young birds is found, the tree or shrub containing the active nest shall remain undisturbed and protected until the nest becomes inactive. The nest shall be protected by placing fence (plastic) a minimum distance of 50 feet from each nest to be undisturbed. This buffer dimension may be changed if determined appropriate by the wildlife biologist and approved by the Engineer.

Work shall not proceed within the fenced buffer area until the young have fledged or the nests have become inactive.

If the fence is knocked down or destroyed by the Contractor, the Engineer will suspend the work, wholly or in part, until the fence is satisfactorily repaired at the Contractor’s expense. Time lost due to such suspension will not be considered a basis for adjustment of time charges but will be charged as contract time.

2. Grasses and Other Vegetation Management. Due to the potential for encountering ground nesting birds’ habitat, if work occurs between April 1 and August 31, the area shall be surveyed by a wildlife biologist within the seven days immediately before ground disturbing activities.

The undisturbed ground cover to 50 feet beyond the planned disturbance, or to the right of way line, whichever is less, shall be maintained at a height of 6 inches or less beginning April 1 and continuing until August 31 or until the end of ground disturbance work, whichever comes first.

If birds establish a nest within the survey area, an appropriate buffer of 50 feet will be established around the nest by the CDOT biologist. This buffer dimension may be changed if determined appropriate by the CDOT biologist and approved by the Engineer. The Contractor shall install fence (plastic) at the perimeter of the buffer. Work shall not proceed within the buffer until the young have fledged or the nests have become inactive.

If the fence is knocked down or destroyed by the Contractor, the Engineer will suspend the work, wholly or in part, until the fence is satisfactorily repaired at the Contractor’s expense. Time lost due to such suspension will not be considered a basis for adjustment of time charges but will be charged as contract time.

(b) Work on structures. The Contractor shall prosecute work on structures in a manner that does not result in a taking of migratory birds protected by the Migratory Bird Treaty Act (MBTA). The Contractor shall not prosecute the work on structures during the primary breeding season, April 1 through August 31, unless he takes the following actions:

(1) The Contractor shall remove existing nests before April 1. If the Contract is not awarded before to April 1 and CDOT has removed existing nests, then the monitoring of nest building shall become the Contractor’s responsibility upon Notice to Proceed.

(2) During the time that the birds are trying to build or occupy their nests, between April 1 and August

31, the Contractor shall monitor the structures at least once every three days for any nesting activity.

(3) If the birds have started to build any nests, they shall be removed before the nest is completed. Water shall not be used to remove the nests if nests are located within 50 feet of any surface waters.

(4) Installation of netting may be used to prevent nest building. The netting shall be monitored and repaired or replaced as needed. Netting shall consist of a mesh with openings that are ¾ inch by ¾ inch or less.

If an active nest become established, i.e., there are eggs or young in the nest, all work that could result in abandonment or destruction of the nest shall be avoided until the young have fledged or the nest is unoccupied as determined by the wildlife biologist and approved by the Engineer. The Contractor shall prevent construction activity from displacing birds after they have laid their eggs and before the young have fledged.

If the project continues into the following spring, this cycle shall be repeated. When work on the structure is complete, the Contractor shall remove and properly dispose of netting used on the structure.

(c) Taking of a Migratory Bird. The taking of a migratory bird shall be reported to the Engineer. The Contractor shall be responsible for all penalties levied by the U. S. Fish and Wildlife Service (USFWS) for the taking of a migratory bird.

METHOD OF MEASUREMENT

240.03 Wildlife Biologist will be measured by the actual authorized number of hours a wildlife biologist is on site performing the required tasks.

Removal of nests will be measured by the actual number of man-hours spent removing inactive nests just before and during the breeding season, April 1 through August 31. During this period, the Contractor shall submit to the Engineer each week for approval a list of the workers who removed nests and the number of hours each one spent removing nests.

Netting will not be measured or paid for as a part of this project.

240.04 The accepted quantities measured as provided above will be paid for at the contract unit price for each of the pay items listed below that appear in the bid schedule.

Payment will be made under:

Pay Item Pay Unit Wildlife Biologist Hour Removal of Nests Hour

Payment for Wildlife Biologist will be full compensation for all work and materials required to complete the item, including wildlife biologist, wildlife survey, and documentation (record of nest location and protection method).

Payment for Removal of Nests will be full compensation for all work and material required to complete the work.

Clearing and grubbing will be measured and paid for per Section 201.

Fence (Plastic) will be measured and paid for per Section 607.

REVISION OF SECTION 304

AGGREGATE BASE COURSE

Section 304 of the Standard Specifications is hereby revised for this project as follows:

Subsection 304.02 shall include the following:

Materials for the wall leveling pad and any other base course used under the sidewalk shown on the plans shall be Aggregate Base Course (Class 6) as shown in subsection 703.03.

Aggregate Base Course (Class 6) shall meet the gradation requirements in subsection 703.03 and have a resistance value of at least 78 when tested by the Hveem Stabilometer in accordance with AASHTO T 190.

REVISION OF SECTION 504

MODULAR BLOCK RETAINING WALL

Section 504 of the Standard Specifications is hereby revised for this project as follows:

Subsection 504.01 shall include the following:

This work consists of constructing a permanent gravity modular block retaining wall using interlocking gravity wall modular blocks as shown in the plans in accordance with these specifications. Retaining wall to consist of modular blocks manufactured by Redi-Rock, Big Block, Stone Strong, Recon Wall Systems or other approved equivalent manufacturer. Modular blocks shall be ledgestone texture or approved equivalent with a natural, non-uniform pattern which mimics natural rock. Modular blocks shall be a sandstone or light brown mixed with multiple colors to create a natural appearance. Color samples shall be submitted and approved by the Town of Frisco.

Subsection 504.04 shall be replaced with the following:

The leveling pad shall be constructed with dense graded Aggregate Base Course (Class 6) as shown on the plans.

Structural excavation for the leveling pad will not be measured or paid for.

Add subsection 504.081 Modular Block Retaining Wall immediately following subsection 504.08 as follows:

Modular Block Retaining Wall should be composed of interlocking gravity blocks consisting of varying sizes as shown in the plans. End blocks shall comply with garden block orientation 2.

Wall backfill shall consist of CDOT Class 1 backfill and be compacted in 8” maximum lifts to 95% stp.

Compacting equipment shall be kept a minimum of 3 feet from the back of the wall face during fill placement and compaction.

Aggregate base course for gravity block retaining wall leveling pad shall be composed of ABC (Class 6).

Drainage pipe shall be either a 4” or 6” (depending on the drain location shown in the plans) diameter HDPE perforated pipe with filter fabric. Drains in wall face shall be constructed as shown on the plans.

Additional concrete coping on wall shall conform to the dimensions and locations as shown on the plans and be constructed per the details provided. All cast in place concrete shall be CDOT Class D.

Any blocks with surface defects shall be rejected unless otherwise approved by the Town of Frisco prior to installation.

Installation of modular blocks shall conform to the manufacturer’s recommendations and no alterations to modular blocks shall be made that aren’t approved by the manufacturer or shown in the plans. A liquid applied waterproofing membrane shall be applied per manufacturer’s recommendation at locations described on the plans.

Repairable product defects discovered during PC or QA inspection shall be corrected at the Contractor’s expense before shipping. Damage incurred during handling, storage, shipment and erection shall be repaired or replaced at the Contractor’s expense. Defects shall be categorized as minor, structural, or rejectable. The PC section shall examine and record all defects. The PC section shall submit a written proposal for minor repairs to the QA Representative for review and acceptance before correcting the minor defects. The proposal shall also address the

MODULAR BLOCK RETAINING WALL

measures the Contractor will take to prevent recurring defects in future blocks. The QA Representative will accept, or reject, the finished repair work in writing. Small production holes that are less than 1/2 inch in depth and less than 1 square inch in surface area shall not be considered defects. Larger production holes shall be repaired. Structural and rejectable defects shall be examined by the Contractor's Engineer. A written proposal for repair of structural or rejectable defects shall be submitted to the QA Representative for review and acceptance before correcting any defects. The proposal shall include a detailed description of repair materials, and the methods the Contractor intends to use to evaluate the finished repair work. The proposal shall also include the measures the Contractor will take to prevent recurring defects in future members. Completed repairs shall be cured as needed to ensure soundness of the reworked area. The defect categories and repair requirements are defined as follows:

(a) Minor Defects. Minor defects are those that do not affect the ability of the product to withstand service or construction loads. Minor defects include superficial discontinuities such as cracks; small spalls, voids, and honeycombed areas. Minor defects of other types may also be designated by the QA Representative. Repair methods shall not affect the structural integrity of the product. The finished repair work shall meet the approval of the QA Representative and the Engineer.

(b) Structural Defects. Structural defects, as determined by the QA Representative or the Engineer, include defects that may impair the ability of the product to adequately withstand construction or service loads. Defects that extend beyond the centerline of any reinforcing steel or into any element of the tensioning system are classified as structural defects. Such defects also include cracks, spalls, honeycombed areas, voided areas, significant concrete breakage areas, cold joints, and segregated concrete areas. Structural defects of other types may also be designated by the QA Representative or the Engineer. The Contractor’s Engineer shall electronically seal a letter that the repair work meets all design serviceability criteria and include the evaluation and test data.

Repair Methods shall adequately restore the structural integrity of the product. The finished repair work, including aesthetic acceptability, shall meet the approval of the Engineer.

(c) Rejectable Defects. Rejectable defects or damages, as determined by the QA Representative or the Engineer, are those that impair the ability of the product to adequately withstand construction or service loads, and that cannot be successfully repaired to structural and architectural acceptability. Structurally defective or rejected products shall not be incorporated into the work but shall be replaced with acceptable products supplied at the Contractor's expense.

Damaged and defective products will also be rejected by the QA Representative for the following reasons:

1. Failure by the Contractor's Engineer to approve and submit proposed repair procedures in writing before repair work begins.

2. Failure by the Contractor to execute the repair work according to QA approved procedures 618.14 618-28.

3. Failure by the Contractor to provide written certification of acceptable structural repair, along with submittal of evaluation and test data, if applicable.

4. Failure by the Contractor to correct recurring defects.

5. Determination by the QA Representative that the work, or materials used in the work, does not meet all contract requirements. Finished and repaired areas shall reasonably match the coloration and profile characteristics of the adjacent concrete. Loose concrete laitance shall be removed from the product before storage.

Subsection 504.20 shall include the following:

Retaining Wall (Gravity) will be not be measured but will be paid for by the plan quantity of the total square foot of block wall face installed and accepted, unless the quantity is changed during construction by Change Order or when it is determined that there are discrepancies on the plans in an amount of at least plus or minus 15% of the

MODULAR BLOCK RETAINING WALL

plan quantity. The work also includes the structure excavation, leveling pad, drainage system, filter fabric, geotextiles, waterproofing, concrete cap/coping, reinforcing steel, coordination with utility companies, labor, equipment, materials and any ancillary materials required to complete the wall per the plans and specifications.

The maximum allowable temporary slopes are 1.3:1. If temporary shoring is required for the construction of the walls, Contractor shall be responsible for designing, constructing, maintaining, and removing shoring. All shoring costs shall be included in the retaining wall pay item.

Subsection 504.21 shall include the following:

Payment will be made under:

Pay Item Pay Unit Retaining Wall (Gravity) Square Foot

Price for the modular block wall shall include materials, equipment to transport and install blocks, sealants, bedding course material, excavation, drainage pipe, temporary shoring, and backfill and placement.

REVISION OF SECTION 514

PEDESTRIAN AND BIKEWAY RAILING

Section 514 of the Standard Specifications is hereby revised for this project as follows:

Subsection 514.02 shall include the following:

Railing material shall be composed of weathered steel and comply with the Buy America requirements. All materials and hardware shall be consistent with the information provided on the plans.

In Subsection 514.06 replace the 7th paragraph with the following:

The pedestrian railing shall remain uncoated and be composed of weathered steel. The railing shall be fabricated per the details provided in the plans.

Subsection 514.08 shall include the following:

Payment will be made under:

Pay Item Pay Unit Pedestrian Railing (Steel) Linear Foot

The cost of pedestrian railing shall include all materials and equipment to transport and install.

REVISION OF SECTION 607

FENCES

Section 607 of the Standard Specifications is hereby revised for this project as follows:

Subsection 607.02 shall include the following:

The wood fencing material shall closely match the size, type, species, and color of the existing split rail fence on site within the project limits.

Subsection 607.05 shall include the following:

Payment will be made under:

Fence Split Cedar Linear Foot

REVISION OF SECTION 608

SIDEWALKS AND BIKEWAYS

Section 608 of the Standard Specifications is hereby revised for this project as follows:

In Subsection 608.02 replace the second paragraph with the following:

Concrete for sidewalks, bikeways, and curb ramps shall be Class DF, shall meet the requirements of Section 601, shall obtain a 28-day compressive strength of 4,500 psi minimum, and shall include the incorporation of fiber mesh into the mix in a manner that complies with the manufacturer’s recommendations.

Subsection 608.03 shall include the following:

(e) Dummy joints for concrete sidewalk shall be sawcut. No dummy joints formed by a jointing tool shall be allowed. Sawcutting and jointing shall be considered incidental to the work.

(g) When tying new sidewalks into existing sidewalk panels, the Contractor shall drill and grout #4 rebar spaced at 18 inches on center with a minimum six inch embedment into the existing concrete. This work will not be measured and paid for separately but shall be included in the cost of the work.

(h) Uncoated cast iron detectable warning plates shall be installed on all curb ramps. Detectable warning plates shall not be paid separately but included in the cost of concrete curb ramp.

REVISION OF SECTION 625

CONSTRUCTION SURVEYING

Section 625 of the Standard Specifications is hereby revised for this project as follows:

Subsection 625.11 shall include the following:

A complete as-built survey shall be submitted to the Town by the Contractor following substantial completion of the project. The survey shall include all salient features, grading, critical design points, grading/topography, boundary/property information, verification of ADA compliance, and utility information.

The as-built survey submittal shall include all relevant CAD files and a stamped and certified PDF of all surveyed plans and features.

This work will not be measured and paid for separately, but shall be included in the cost of the lump sum survey work.

Construction Surveying Lump Sum

REVISION OF SECTION 626

MOBILIZATION

Section 626.01 shall also include:

Contractor may mobilize and stage equipment, materials, and offices at the Town of Frisco Public Works Yard located at 102 School Road.

REVISION OF SECTION 630

CONSTRUCTION ZONE TRAFFIC CONTROL

Section 630 of the Standard Specifications is hereby revised for this project as follows:

Subsection 630.10(a) shall include the following:

The components of the TCP for this project are included in the following:

(1) Subsection 104.04 and Section 630 of the specifications.

(2) Standard Plan S-630-1, Traffic Controls for Highway Construction.

(3) Signing & Striping Plans.

(4) Schedule of Traffic Control Devices.

Unless otherwise approved by the Engineer, the Contractor’s equipment shall follow normal and legal traffic movements. The Contractor’s ingress and egress of the work area shall be accomplished with as little disruption to traffic as possible. Traffic control devices shall be removed by picking up the devices in a reverse sequence to that used for installation. This may require moving backwards through the work zone. When located behind barrier or at other locations shown on approved traffic control plans, equipment may operate in a direction opposite to adjacent traffic. Generally speaking, the Contractor will only be allowed to work on one side of any given road at a time, unless approved otherwise by the Engineer.

Special Traffic Control Plan requirements for this project are as follows:

1. During the construction of this project, traffic shall use the present traveled roadway unless identified on the plans or approved by the Engineer. The Contractor shall not have construction equipment or materials in the lanes open to traffic at any time, unless approved by the Engineer.

2. At least one week prior to starting construction, the Contractor shall notify Town of Frisco Engineer of the date the Contractor intends to start construction.

3. The Contractor shall not perform any work requiring a lane closure on the roadway except within the approved working hours or as directed by the Engineer. All lane closures shall be subject to the approval of the Engineer. A MHT (Method of Handling Traffic) shall be computer generated (not hand drawn) and shall be approved by the Engineer prior to any request for a lane closure. Request for a lane closure shall be made at least 48 hours in advance of the time the lane closure is to be implemented. Lane closures will not be allowed to remain unless being utilized continuously for the purpose for which they were set up.

4. The Contractor shall acquire and provide the Project Engineer with a copy of all police accident reports for any accidents occurring within the project limits. The cost to acquire and deliver these reports will not be paid for separately but shall be included in the cost of the work.

5. The Contractor and subcontractors shall equip their construction vehicles with flashing amber lights.

Equipment to be used at night shall also be equipped with flashing amber lights. Flashing amber lights on vehicles and equipment shall be visible from all directions.

6. The costs of maintaining access will not be paid for separately, unless otherwise provided, but shall be included in the work. Utilization of materials to be incorporated into the work may be permitted.

7. Lane closures shall be in accordance with the region lane closure strategy found here:

https://www.codot.gov/safety/traffic-safety/assets/work-zones/lane-closure-strategies/R3_Lane_Closure_Report.pdf. Per the lane closure strategy report, through-lane closures for the project limits are only allowed 9 am to 12 pm and 6 pm to 8 am. Closures of through-lanes will not be allowed outside these specified times.

https://www.codot.gov/safety/traffic-safety/assets/work-zones/lane-closure-strategies/R3_Lane_Closure_Report.pdf https://www.codot.gov/safety/traffic-safety/assets/work-zones/lane-closure-strategies/R3_Lane_Closure_Report.pdf

CONSTRUCTION ZONE TRAFFIC CONTROL

8. However, any…