_PSP 20240329 - 24848 Salida Oak Street RMS PSPs.pdf

Project No C M150-010 Advertisement Date: 04/05/2024 Construction Project Code No. 24848

COLORADO DEPARTMENT OF TRANSPORTATION

PROJECT SPECIAL PROVISIONS

Project No. C M150-010 Construction Project Code No 24848 Oak Street Multi-Modal RMS Project

The 2023 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

Index Pages - Project Special Provisions (March 25th, 2024) 1 Notice to Bidders (March 25th, 2024) 2 Commencement and Completion of Work (March 25th, 2024) 3-4 Revision of Section 105 – Cooperation Between Contractors (March 25th, 2024) 5 Revision of Section 107 – Protection and Restoration of Property and Landscape (March 25th, 2024) 6 Revision of Section 107 – Air Quality Control (March 25th, 2024) 7 Revision of Section 107 – Water Quality Control (March 25th, 2024) 8 Revision of Section 107 – Performance of Safety Critical Work (March 25th, 2024) 9-10 Revision of Section 202 – Removal of Asphalt Mat (March 25th, 2024) 11-14 Revision of Section 203 – Blading (February 16, 2024) 15 Revision of Section 210 – Adjust Maintenance Hole and Valve Box (March 25th, 2024) 16 Revision of Section 211 – Dewatering (March 25th, 2024) 17 Revision of Section 214 – Planting (March 25th, 2024) 18 Revision of Section 240 – Migratory Birds (March 25th, 2024) 19-21 Revision of Section 250 – Environmental, Health and Safety Management (March 25th, 2024) 22-23 Revision of Section 304 – Aggregate Base Course (Special) (March 25th, 2024) 24-25 Revision of Section 310 – Full Depth Reclamation of HMA (March 25th, 2024) 26-28 Revision of Section 401 and 403 – HMA (Patching)(Asphalt) (March 25th, 2024) 29 Revision of Section 603 – Storm Drain (March 25th, 2024) 30 Revision of Section 608 – Detectable Warning Plate (March 25th, 2024) 31 Revision of Section 610 – Median Cover Material (6 Inch Patterned Concrete) (March 25th, 2024) 32 Revision of Section 613 – Pull Box (March 25th, 2024) 33 Revision of Section 613 – Luminaire (Special) (March 25th, 2024) 34 Revision of Section 613 – Electrical Conduit – General (March 25th, 2024) 35-37 Revision of Section 625 – Asset Geospatial Data Collection (March 25th, 2024) 38-42 Revision of Section 626 – Public Information Services (Tier IV) (March 25th, 2024) 43-47 Revision of Section 627 – Preformed Plastic Pavement Marking (Inlaid) (March 25th, 2024) 48 Revision of Section 627 and 713 – Preformed Thermoplastic Pavement Marking (Inlaid) (March 25th, 2024) 49 Revision of Section 630 – Barrier (Temporary) (March 25th, 2024) 50 Revision of Section 630 – Traffic Control Management (March 25th, 2024) 51 Revision of Section 713 – Retroreflective Sheeting (March 25th, 2024) 52 Special Construction Requirements (March 25th, 2024) 53 Traffic Control Plan – General (March 25th, 2024) 54-55 Utilities (March 25th, 2024) 56-59 Force Account Items (March 25th, 2024) 60

NOTICE TO BIDDERS

Pursuant to subsections 102.04 and 102.05, it is recommended that bidders on this project review the work site and plan details with an authorized representative. The project has been advertised in The Mountain Mail and Bidnetdirect.com. Prospective bidders shall only submit questions during the pre-bid meeting or on the bidnet platform. Questions will be answered via an addendum, which will be issued per the schedule available via bidnet.

Purchasing-Administrator TBD (City of Salida) Office Phone:

Email:

Salida Project Manager David Lady, PE (City of Salida) Office Phone: 719-539-6257 David.lady@cityofsalida.com

Design Engineer (Consultant) Steve Winters, PE (SEH) Office Phone: 970-459-9015 stevew@russellpe.com

CDOT Bridget McDougall, PE (CDOT) Office Phone: 970-692-7839 bridget.mcdougall@state.co.us

Bidders may, during the bidding period, be advised by the Addenda of additions to, deletions from, or changes in the requirements of the contract documents. This information will be disseminated via bidnetdirect.com only. The City of Salida, CDOT, and SEH will not be responsible for the authenticity or correctness of oral interpretations of the contract documents or for information obtained in any other manner than through the media of addenda. Bidders in their bids shall acknowledge receipt of each Addendum, and each Addendum shall be considered a part of the contract documents. Failure to acknowledge receipt of any Addendum issued may invalidate a bid as incomplete.

Written questions must be received by the date stated in bidnetdirect.com.

The above referenced individuals are listed for information only. They will be working on the project during the construction phase, and any attempts to make direct contract with the any other than the purchasing administrator during the bidding period will be ignored.

Questions and answers shall be used for reference only and shall not be considered part of the Contract. All City of Salida and CDOT bidding requirements listed within the Request for Bid shall govern the project.

mailto:stevew@russellpe.com

COMMENCEMENT AND COMPLETION OF WORK

(Floating Start Date)

The Contractor shall select the date that contract time begins for this project, subject to the following conditions:

(a) The earliest date shall be May 15th, 2024.

(b) The latest date shall be June 15th, 2024.

(c) The Contractor shall notify the Engineer, in writing, at least 30 days before the proposed beginning date. If the earlier date, as stated above, follows the award date by less than 30 days, the Contractor's written notice to the Engineer shall be at least 10 days before the proposed beginning date.

(d) The date that contract time begins shall be subject to Project Manager or

Resident Engineer’s approval. A different date may be authorized in writing by the Project Manager or Resident Engineer in the "Notice to Proceed."

The Contractor shall complete all work within 180 working days per the "Notice to Proceed."

If materials stockpiling begins before the beginning date, contract time will not be charged for the stockpiling effort.

Stockpiling of materials before the beginning date is subject to the Engineer's approval. If such approval is given, stockpiled material will be paid for per Sections 109 and 626.

Subsection 108.05 shall include the following:

The Contractor shall complete the following discrete portions of the work (milestones) by the dates specified. A disincentive will be assessed for failure to complete the work for each milestone by the specified completion date.

Milestone No. 1 Completion Date: within 20 working days of project start or July 1st (whichever is sooner) Description: Construction of Salida Fire Department Access apron and Sidewalk directly adjacent to property Incentive and Disincentive: $500/day

Milestone No. 2 Completion Date: within 30 working days of Storm Drain commencement Description: Installation of all Storm Drain improvements Incentive and Disincentive: $200/day

Milestone No. 3 Completion Date: Subgrade Preparation within 150 working days of project start Description: Installation of all Storm Drain improvements Incentive and Disincentive: $200/day

Subsection 108.08 shall include the following:

Time will not be charged during the months of December, January, February or March. This time is defined as free time and work may continue if conditions permit. No additional compensation or consideration will be given to the Contractor for cold weather work.

Work can commence after the pre-construction meeting is held with CDOT, the City of Salida, and the Contractor and all required submittals from the Contractor are approved by CDOT and City of Salida.

Stockpiling of materials before the beginning date is subject to the City of Salida’s approval. If such approval is given, stockpiled material will be paid for in accordance with Sections l09 and 626.

Section 108 of the Standard Specifications is hereby revised for this project as follows:

Subsection 108.03 shall include the following:

The Contractor's progress schedule may be a Bar Chart Schedule. The City of Salida desires the work to be completed within 150 calendar days and final completion shall be achieved prior to December 1st, 2024. The start date is at the Contractor’s discretion, but shall not be later than May 31st, 2024.

No additional compensation or consideration will be given to the Contractor for the proposed winter shutdown.

Salient features to be shown on the Contractor's Critical Path Schedule are:

(1) Mobilization

(2) Potholing of Utilities, critical clearance locations

(3) Advanced Warning Sign Installation

(4) Construction Surveying

(5) Erosion Control and BMP installation

(6) Traffic Control

(7) Temporary Fencing

(8) Removal of Concrete Panels, Curb and Gutter, and Pavement Markings

(9) Utility Work, Caisson drilling and installation

(10) Curb, Gutter, Sidewalk, Driveway, and Median Construction

(11) Signal and push button installation

(12) Landscape and Seeding installation

(13) Signage and Striping

(14) Project Clean-up and address Punchlist

(15) De-mobilization

Subsection 108.05 shall include the following:

The Contractor shall obtain permission from the City of Salida and CDOT Staff to complete any Removals, Utility Work and Flowable Fill, or other elements of construction during off peak hours (5pm – 7am), if needed.

The Contractor shall always maintain one lane of traffic in both directions on all City Streets. One point of access shall remain in place to all commercial and residential properties along the improvement corridor at all times, and Contractor shall be responsible for notifying businesses or residents of impacts no less than 3 days prior to any work being completed that changes traffic patterns to/from their property.

Construction staging shall be solely the responsibility of the Contractor. No construction materials or equipment may be stored within City of Salida or CDOT ROW, without written approval of said entity.

REVISION OF SECTION 105

COOPERATION BETWEEN CONTRACTORS

Section 105 of the Standard Specifications is hereby revised for this project as follows:

Subsection 105.11 shall include the following:

The Contractor has the responsibility of coordinating the work with any other construction activities occurring within the vicinity of the construction site. This includes but is not limited to work completed by utility companies, City of Salida maintenance, Salida Fire Department Project Contractor, and other contractors entering and exiting private properties or tying in with proposed improvements . The Contractor shall coordinate work to ensure the construction of all projects occur with minimal disruption to the traveling public. The Contractor is responsible for determining and addressing all construction and other potential coordination issues that may impact the project. The Contractor is not entitled to compensation for delays caused by other construction activity.

Available project construction schedules from all projects in the area will be shared upon request and availability.

A Cooperation between Contractors Plan that includes communication and coordination of work schedules shall be submitted for review and acceptance by CDOT, five (5) working days prior to the start of work. As a minimum the plan shall address the following:

1. Coordination of emergency vehicles through the projects and the implementation of an Emergency Vehicle Access Plan.

2. Coordination of work to not exceed the maximum traffic delays specified in the contract.

3. Coordination of road closures to minimize delay to the traveling public.

4. Communication with the local emergency responders and law enforcement agencies.

5. Communication with City and Utility Projects, if any are expected.

Updates to the Emergency Vehicle Access Plan shall be posted by the Public Information Manager. This shall include updated information to be maintained on the local number Public Information line and on the CDOT internet website. Updates shall be posted weekly or whenever changes have been approved by CDOT.

The Contractor shall schedule and coordinate all traffic lane closures and MHT’s at least three weeks prior to the lane closure or MHT taking effect. All other phasing sequencing shall be submitted to CDOT for approval prior to its implementation.

Contractors’ representatives shall meet with CDOT Staff and other entities as often as necessary to maintain coordination of construction activities.

The cost of the coordination and communication equipment shall be included in the work with no separate payment.

REVISION OF SECTION 107

PROTECTION AND RESTORATION OF PROPERTY AND LANDSCAPE

Section 107 of the Standard Specification is hereby revised as follows:

Subsection 107.12 shall include the following:

The Contractor shall protect existing vegetation adjacent to the work area that lie within drainage areas to the extent practicable during construction of the project. Vegetation within drainage areas provides natural filtration of sediments that may otherwise be lost as sediment discharges. The Contractor shall fence specific areas of vegetation to be protected in the field as directed by CDOT. No work is proposed for private property and the Contractor may not enter private property to complete any of the work.

The Contractor shall perform all the work in such a manner that the least environmental damage will result. Any questionable areas or items shall be brought to the attention of the City of Salida or CDOT for approval prior to vegetation removal or any damaging activity. Damaged or destroyed vegetation which could have been saved, shall be replaced at the expense of the Contractor.

If the fencing, signage, or property owned by the City of Salida, CDOT, or neighboring property owners is knocked down or destroyed by the Contractor, the City of Salida will suspend the work, wholly or in part, until the property is repaired to the City’s satisfaction 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.

AIR QUALITY CONTROL

Subsection 107.24 shall include the following:

Watering or other fugitive dust control methods will be employed to reduce fugitive dust. Costs associated with fugitive dust control activities shall not be paid for separately, but shall be included in the cost of the work.

WATER QUALITY CONTROL

Subsection 107.25 shall include the following:

In accordance with Section 107.25, all concrete work, including but not limited to Storm Drain, Curb and Gutter, Bike Lanes, Sidewalks, Saw-cutting Joints, concrete washing and treatment work shall be conducted in a manner that prevents wash water and other potential pollutants, including concrete and sandblasting debris, from entering Waters of the US.

Potential pollutants shall be contained and disposed of in accordance with applicable State and Federal waste disposal requirements.

Washout and waste material disposal will not be measured and paid for separately, but shall be included in the work.

Subsection 107.25 (12) shall include the following:

All wetlands, Waters of the U.S., and riparian areas shall be protected from staging, construction equipment, work activities, and any other unpermitted fills by installing temporary orange construction fencing, or other appropriate BMP’s, as directed by the City of Salida. There are no identified wetlands within the project area.

Construction fencing, or other BMP utilized, as directed by City of Salida, shall be removed upon project completion.

No temporary or permanent fills within wetland areas or Waters of the U.S. are allowed under the Contract. Existing trees, shrubs, bushes, grass, or wetland areas outside the designated work area but inside the project limits that are damaged due to the Contractor’s operations shall be replaced in kind at the Contractor’s expense.

PERFORMANCE OF SAFETY CRITICAL WORK

Section 107 of the Standard Specifications is hereby revised as follows:

Add subsection 107.061 immediately following subsection 107.06 as follows:

107.061 Performance of Safety Critical Work. The following work elements are considered safety critical work for this project:

(1) Any work involving employees working within the clear zones of City of Salida Streets and CDOT Highways.

Clear Zone – ADT <750 = 10’ Clear Zone – ADT 750-1500 = 12’ Clear Zone – ADT 1500-6000 = 14’ Clear Zone – ADT > 6000 = 18’

The Contractor shall submit, for record purposes only, an initial detailed construction plan, including MHT’s, that addresses safe construction of each of the safety critical elements. The detailed construction plans and MHT’s shall be submitted two weeks prior to the safety critical element conference described below. The construction plan shall be stamped “Approved for Construction” and signed by the Contractor. The construction plan will not be approved by CDOT of the City of Salida.

The Construction Plan shall include the following:

(1) Safety Critical Element for which the plan is being prepared and submitted.

(2) Contractor or subcontractor responsible for the plan preparation and the work.

(3) Schedule, procedures, equipment, and sequence of operations, that comply with the working hour limitations

(4) Temporary works required: falsework, bracing, shoring, etc.

(5) Additional actions that will be taken to ensure that the work will be performed safely.

(6) Names and qualifications of workers who will be in responsible charge of the work:

A. Years of experience performing similar work B. Training taken in performing similar work C. Certifications earned in performing similar work

(7) Names and qualifications of workers operating cranes or other lifting equipment A. Years of experience performing similar work B. Training taken in performing similar work C. Certifications earned in performing similar work

PERFORMANCE OF SAFETY CRITICAL WORK

(8) The construction plan shall address how the Contractor will handle contingencies such as:

A Unplanned events (storms, traffic accidents, etc.)

B Structural elements that don’t fit or line up A Work that cannot be completed in time for the roadway to be reopened to traffic B Replacement of workers who don’t perform the work safely C Equipment failure D Other potential difficulties inherent in the type of work being performed

(9) Name and qualifications of Contractor’s person designated to determine and notify CDOT in writing when it is safe to open a route to traffic after it has been closed for safety critical work.

(10) Erection plan or bridge removal plan when submitted as required elsewhere by the specifications. Plan requirements that overlap with above requirements may be submitted only once.

A safety critical element conference shall be held one week prior to beginning construction on each safety critical element.

The City of Salida, CDOT, the Contractor, the safety critical element subcontractors, and the Contractor’s Engineer shall attend the conference.

After the safety critical element conference, and prior to beginning work on the safety critical element, the Contractor shall submit a final construction plan to The City of Salida and CDOT for record purposes only. The Contractor’s Engineer shall sign and seal temporary works, such as falsework, shoring etc., related to construction plans for the safety critical elements. The final construction plan shall be stamped “Approved for Construction” and signed by the Contractor.

The Contractor shall perform Item #2 of safety critical work only when the Contractor’s Engineer is on the project site.

The Contractor’s Engineer shall be on site to inspect and provide written approval of safety critical work for which he provided signed and sealed construction details.

When ordered by the City of Salida or CDOT, the Contractor shall immediately stop safety critical work that is being performed in an unsafe manner or will result in an unsafe situation for the traveling public. Prior to stopping work, the Contractor shall make the situation safe for work stoppage. The Contractor shall submit an acceptable plan to correct the unsafe process before CDOT will authorize resumption of the work.

When ordered by the City of Salida or CDOT, the Contractor shall remove workers from the project that are performing the safety critical work in a manner that creates an unsafe situation for the public in accordance with subsection 108.05.

Should an unplanned event occur or the safety critical operation deviate from the submitted plan, the Contractor shall immediately cease operations on the safety critical element, except for performing any work necessary to ensure worksite safety, and provide proper protection of the work and the traveling public. If the Contractor intends to modify the submitted plan, he shall submit a revised plan to the City of Salida and CDOT prior to resuming operations.

All costs associated with the preparation and implementation of each safety critical element construction plan will not be measured and paid for separately, but shall be included in the work.

Nothing in the section shall be construed to relieve the Contractor from ultimate liability for unsafe or negligent acts or to be a waiver of the Colorado Governmental Immunity Act on behalf of the Department.

REVISION OF SECTION 202

REMOVAL OF ASPHALT

MAT (PLANING)

Section 202 of the Standard Specifications is hereby revised for this project as follows: Delete subsection 202.09, and replace it with the following:

202.09 Removal of Asphalt Mat (Planing). Prior to beginning planing operations, the Contractor shall submit a planing plan and a Process Control Plan (PCP) for approval by the Engineer. The planing plan shall include at a minimum:

(1) The number, types and sizes of planers to be used.

(2) The width and location of each planing pass.

(3) The number and types of brooms to be used and their locations with respect to the planers.

(4) The proposed method for planing and wedging around existing structures such as manholes, valve boxes, and inlets.

(5) The longitudinal and transverse typical sections for tie-ins at the end of the day.

(6) If requested by the Engineer, a plan sheet showing the milling passes.

The PCP shall include as a minimum:

(1) The schedule for replacing the cutting teeth.

(2) The daily preventive maintenance schedule and checklist.

(3) Proposed use of automatic grade controls.

(4) The surface testing schedule for smoothness.

(5) The process for filling distressed areas.

(6) The schedule for testing macrotexture of the milled surface.

(7) Corrective procedures if the milled surface does not meet the minimum macrotexture specification.

(8) Corrective procedures if the milled surface does not meet the minimum transverse or longitudinal surface finish when measured with a 10 foot straightedge.

The Contractor shall not start the planing operation until the hot mix asphalt (HMA) mix design has been approved and a Form 43 has been signed by the Engineer.

The existing pavement shall be milled to the cross-slope as shown on the plans, and shall have a surface finish that does not vary longitudinally or transversely more than 3/8 inch from a 10 foot straightedge. A 10 foot straightedge shall be supplied by the Contractor.

All milled surfaces shall be broomed with a pick-up broom, unless otherwise specified, before being opened to traffic. A sufficient number of brooms shall be used immediately after planing to remove all milled material remaining in the roadway.

MAT (PLANING)

If the Contractor fails to adequately clean the roadway, work shall cease until the Engineer has approved the Contractor's revised written proposal to adequately clean the roadway.

The milled surface shall have a macrotexture equal to or less than 0.170 inches for single-lift overlays and 0.215 inches for multiple-lift overlays as tested in accordance with CP 77.

Milled surfaces that do not meet these criteria shall require corrective action in accordance with the QCP. The Contractor shall be responsible for testing the macrotexture of the milled surface at the location directed by the Engineer in accordance with CP 77 at a stratified random frequency of one test per 10,000 square yards or a minimum of once per work day.

At the completion of each day's work, longitudinal vertical edges greater than 1 inch shall be tapered. No transverse vertical edges will be allowed. Longitudinal milled surface tie-ins to existing pavement shall be tapered to not less than a 3:1 slope, transverse milled surface tie-ins to existing pavement shall be tapered to not less than a 50:1 slope.

Transverse tapered joints may be tapered with the planing machine, a temporary asphalt ramp, or other methods approved by the Engineer. No longitudinal joint between the milled and existing surfaces shall fall between 1 to 5 feet of any lane line.

If the transverse joint is tapered with a temporary asphalt ramp, the milled surface at the joint shall be constructed as a butt joint the full depth of the lift of asphalt to be placed on the milled surface. The Contractor shall be responsible for maintaining this asphalt ramp until all corresponding HMA is placed. All work associated with this joint will not be paid for separately, but shall be included in the cost of planing.

If the transverse joint is tapered with a planing machine, a butt joint shall be cut into the taper the full depth of the lift of asphalt to be placed on the milled surface prior to commencement of resurfacing. All work associated with this joint will not be paid for separately, but shall be included in the cost of planing.

Other approved transverse joint tapers shall be maintained at the expense of the Contractor, and at a minimum shall incorporate a butt joint the full depth of the lift of asphalt to be placed on the milled surface prior to commencement of resurfacing.

Distressed or irregular areas identified in the planed surface by the Engineer shall be patched.

The roadway shall be left in a safe and usable condition at the end of each work day. The Contractor shall take appropriate measures to ensure that the milled surface does not trap or hold water. All required pavement markings removed by the planing shall be restored before the roadway is opened to traffic.

MAT(PLANING)

All milled surfaces to be overlaid with HMA shall be covered with new asphalt within 5 working days.

All planing shall be completed full width and parallel to the travel lanes before resurfacing commences unless otherwise directed by the Engineer.

All material generated by the planing operation shall become the property of the Contractor unless otherwise noted in the Contract.

Each planer shall conform to the following:

The planer shall have sufficient power, traction and stability to maintain an accurate depth of cut. The propulsion and guidance system of the planer shall be maintained in such condition that the planer may be operated to straight and true lines.

The planer shall be capable of operating with automatic grade controls (contact or non-contact) on both sides of the machine using a 30 foot averaging system or other approved grade control systems. The use of such controls shall be described in the Contractor's PCP.

The planer shall be capable of picking up the removed material in a single operation. A self-loading conveyor shall be an integral part of the planer. Windrows will not be allowed.

Subsection 202.12 shall include the following:

Macrotexture testing, macrotexture corrective actions, planers, brooms and all other work necessary to complete the item will not be measured and paid for separately, but shall be included in the work.

Section 202 of the Standard Specifications is hereby revised for this project as follows: Subsection 202.01 shall include the following:

This work includes removal and disposal of existing asphalt mat within the project limits as shown on the plans or at locations directed by the Engineer.

In subsection 202.02 delete the seventh paragraph and replace with the following:

The existing asphalt mat shall be removed in a manner that minimizes contamination of the removed mat with underlying material. The removed mat shall become the property of the Contractor and shall be either disposed of outside the project site, or used in one or more of the following ways:

MAT(PLANING)

1. Used in embankment construction in accordance with section 203.

2. Placed in bottom of fills as approved by the Engineer.

3. Recycled into the hot mix asphalt.

4. Placed in the subgrade soft spots as directed by the Engineer.

Subsection 202.11 shall include the following:

The removal of the existing asphalt mat will be measured by the square yard of mat removed to the required depth and accepted.

Subsection 202.12 shall include the following: Payment will be made under:

Pay Item Removal of Asphalt Mat (Planing)

Pay Unit Square Yard

Unless otherwise specified in the Contract, the disposal of the asphalt mat or its use in other locations on the project will not be measured and paid for separately, but shall be included in the work.

REVISION OF SECTION

203 BLADING

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

In subsection 203.01 delete the first paragraph and replace with the following:

This work consists of furnishing motor graders or other available equipment, with operators, for shaping roadway, shoulders, or other areas as designated by the Engineer. Equipment designated for this use shall be proposed by the Contractor in writing a minimum of five days prior to use and approved by the Engineer.

Subsection 203.04 shall include the following:

Equipment that, in the opinion of the Engineer, is inadequate to produce the required results shall not be used. All equipment shall be operated by experienced operators. The equipment shall be used as directed by the Engineer.

Subsection 203.13 shall include the following:

Blading will be measured by the number of hours that it is actually used as ordered. Time involved in moving onto or off the project will not be measured and paid for under this item.

Time will be paid for moving the blade from one location on the project to another, if directed, but time will not be allowed when moving the blade is considered to be idle or for moves which are made for the convenience of the Contractor.

Subsection 203.14 shall include the following:

The accepted quantities will be paid for at the contract unit price per hour. Payment will be made under:

Pay Item Blading

Hour

REVISION OF SECTION 210

ADJUST MAINTENANCE HOLE & VALVE BOX

Section 210 of the Standard Specifications is hereby revised for this project as follows:

Subsection 210.01 shall include the following:

All existing Manholes and Water Valves located within pavement to be modified by more than ¼” shall be raised or lowered by adding or removing grade rings, as necessary to match proposed pavement elevation. Each Manhole and Water Valve shall have a concrete collar, per detail within plans.

Pay Item Pay Unit Adjust Maintenance Hole Each Adjust Valve Box Each

REVISION OF SECTION 211

DEWATERING

Section 211 is hereby added to the Standard Specifications for this project as follows:

Subsection 211.01 shall include the following: This work includes all dewatering necessary to install utilities, construct foundations, culverts, headwalls, wingwalls, or signal caissons. This work to include pumps, power supply, additional excavation, dewatering permit, proper treatment and disposal of ground water collected from dewatering operations during excavation activities, all other items not specified that are required to sufficiently dewater the site.

Contractor shall apply for and obtain a construction dewatering permit with the Colorado Department of Public Health and Environment (CDPHE) if necessary. A completed application must be submitted to CDPHE at least 30 days prior to dewatering operations. Required dewatering of excavations shall be conducted in a manner that avoids pollution and erosion. Water from dewatering operations shall not be directly discharged into any state waters including wetlands, irrigation ditches, canals, or storm sewers, unless allowed by a permit. Discharge into sanitary sewers will not be allowed unless written permission is obtained from the owner or controlling authority and a copy of this approval submitted to the City of Salida and CDOT. Unless prohibited by law or otherwise specified in the Contract, the water from dewatering operations shall be contained in basins for dissipation by infiltration or evaporation, shall be hauled away from the project for disposal in accordance with applicable laws and regulations, or shall be land applied to approved non-wetland vegetated areas and allowed to evaporate. Water that is land applied shall meet all state water quality thresholds listed in Colorado Water Quality Control Commission Regulations 31-39 and 71-75.

Depending upon the quality of the water, land application of water to vegetated areas may require a written concurrence or permit from CDPHE and from the owner of the facility. Based on guidelines and criteria from CDPHE, the Contractor shall determine the quality of the water, obtain applicable concurrences or permits, and furnish copies of the concurrences or permits obtained to the City of Salida and CDOT.

In accordance with permit procedures, the Contractor shall fill out and submit a monthly Discharge Monitoring Report (DMR) to CDPHE for the life of permit. Copies of monthly submittals shall be provided to the City of Salida and CDOT.

Subsurface water is not anticipated on the project, but if necessary, Dewatering shall be considered incidental to the project and will not be paid for as a separate bid item

REVISION OF SECTION 214

PLANTING

Section 212.06 Shall be modified as follows:

(d) Seed Mix within City of Salida ROW for all areas to be reseeded with the following Seed Mix as follows:

REVISION OF SECTION 240

PROTECTION OF MIGRATORY BIRDS

BIOLOGICAL WORK PERFORMED BY THE CONTRACTOR’S BIOLOGIST

Section 240 is hereby added to the Standard Specifications for this project as follows:

DESCRIPTION

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 prior to 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. 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 prior to 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 prior to 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) Raptor Nesting. The wildlife biologist shall conduct raptor nest surveys within 0.25 mile of the construction sites prior to the start of construction and prior to each construction phase for construction activities occurring from February 15 to July 15.

This survey can be done with binoculars. If construction activities are located within the Colorado Parks and Wildlife (CPW) recommended buffer zone for specific raptors, "NO WORK" zones shall be established around active sites during construction according to the CPW standards or as recommended by the wildlife biologist in consultation with the CPW. The "NO WORK" zone shall be marked with either fencing or signing. Work shall not proceed within a “NO WORK” zone until the wildlife biologist has determined that the young have fledged or the nest is unoccupied.

(c) Bald Eagle Roost. Because the Arkansas River contains a Bald Eagle winter concentration area, the wildlife biologist shall conduct dusk and dawn bald eagle winter roost surveys within seven days prior to the start of any construction during the winter season, November 15 to March 15. If a Bald Eagle roost is identified, construction activity shall not proceed within

0.25 mile of active nocturnal roost sites between November 15 and March 15.

(d) 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.

BASIS OF PAYMENT

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

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)

Clearing and grubbing will be measured and paid for in accordance with Section 201. Mowing will not be measured and paid for separately, but shall be included in the work.

Removal and trimming of trees will be measured and paid for in accordance with Section 202.

Fence (Plastic) will be measured and paid for in accordance with Section 607

REVISION OF SECTION 250

ENVIRONMENTAL, HEALTH AND SAFETY MANAGEMENT

Section 250 of the Standard Specifications is hereby revised for this project as follows:

Subsection 250.03 shall include the following:

As specified in 250.03(a), at the end of the project, the health and safety officer (HSO) shall prepare and submit a final site report to the engineer including a detailed summary of all potentially contaminated materials and potentially contaminated water encountered and their final disposition. This report shall include all analytical laboratory reports and field screening data used to characterize the materials. If contaminated materials are not encountered, the Contractor shall submit a report including all field screening data utilized to determine the absence of contamination.

The Contractor shall prepare a Health and Safety Plan (HASP), as specified in 250.03(c) and follow the requirements of subsection 250.03.

Subsection 250.04 shall include the following:

All metal project components that are removed (e.g., light poles, metal railing) shall be recycled. As these materials are recycled, and not disposed at a landfill, it is not necessary to evaluate the content of lead by TCLP, regardless of total lead concentration.

The recycling facility must be notified in writing that metal project components contain lead. Documentation of disposal, in the form of receipt, shall be submitted to the Engineer for the project file.

If recycling of metal project components is not possible or for disposal of non-metallic components (such as a painted wooden guardrail), the contractor is required to analyze paint chips from each color and paint type separately. Painted materials having a total lead content of greater than 0.01 percent (%) in paint require additional sampling and analysis to determine if the waste will exceed Resource Conservation and Recovery Act (RCRA) Hazardous Waste Limits for landfill leaching and disposal. These paint samples require analysis by the Toxicity Characteristic Leachate Procedure (TCLP). This sample should include not only paint, but a representative sample of the total waste in ratio’s representative of the waste. If the result of the TCLP analysis is less than 5.0 milligrams per liter (mg/L) lead, the material may be disposed as solid waste at a permitted Subtitle D landfill. If the result of the TCLP analysis is equal to or exceeds 5.0 mg/L lead, then lead paint shall be disposed of as hazardous waste.

Subsection 250.05 shall include the following:

The Contractor shall review the Modified Environmental Site Assessment (MESA) findings to prepare a Materials Management Plan (MMP) to address the additional handling of soils and groundwater (if encountered) to be excavated for construction of the project that are suspected or known to be contaminated. Contaminated soil and/or groundwater may be encountered on this project. The MESA identified several potential environmental conditions (PECs) along the project area on Oak Street.

1. 105 Oak Street (NE Corner of Oak and Wood Avenue) was historically a gas station (1945 Sanborn Map) with three petroleum underground storage tanks (USTs). No additional information regarding this facility was found.

2. 202/206 Oak Street (SW corner of Park Ave. and Oak Street) is an auto service, engine repair, and machining shop since some time between 1945-1963. An oil/water separator or large stormwater drain was observed in the rear of the property, outside the building. The presence of USTs, sumps, and soil and/or groundwater contamination is unknown.

The MMP will detail construction methods, and special handling of groundwater and soils to be excavated for construction of the project that are suspected or known to be contaminated. The MMP shall provide specific details regarding the methods, logistics, sampling, and timing of environmental monitoring and survey activities for excavation activities. The plan shall identify the Contractor’s representative responsible for environmental compliance and include a contingency plan for addressing unanticipated conditions. The locations of contaminants and avoidance measures shall also be included in the plan. The MMP and the HASP shall be submitted prior to the Pre-Construction Conference for review and approval by the CDOT Environmental Unit.

Subsection 250.10 shall include the following:

The cost of the Materials Management Plan will be included in the lump sum of the Environmental Health and Safety Management pay item. The management, transport and disposal of solid or hazardous waste shall be paid for by Environmental Health and Safety- Force Account.

ENVIRONMENTAL, HEALTH AND SAFETY MANAGEMENT

Pay Item Description Pay Unit 250-00010 Environmental Health and Safety Management Lump Sum 250-00110 Health and Safety Officer Hour (Estimate 12) 250-00050 Monitoring Technician Hour (Estimate 60) 700-70589 Environmental Health and Safety Management Force Account (Est $5,000)

REVISION OF SECTION 304 AGGREGATE

BASE COURSE (SPECIAL)

Section 304 of the Standard Specifications is hereby revised for this project as follows: Delete subsection 304.01 and replace with the following:

This work consists of furnishing and placing one or more courses of aggregate and additives, if required. The work includes the preparation of the shoulder subgrade by blading to remove vegetation and to slope shoulders away from the edge of the pavement. Shoulder grading shall take place prior to placement of the topmost layer of pavement.

The Contractor shall place Aggregate Base Course (Special) within 3 calendar days of placing pavement materials unless otherwise approved by the Engineer. Pavement edge drop-offs 2" or greater immediately adjacent to traffic (within 10 feet of the traveled way) shall not be left unprotected overnight without placement of warning signs, drum channelizing devices, and a wedge of adequate material installed as directed by the Engineer.

Subsection 304.02 shall include the following:

Acceptable shoulder gravel alternatives are:

(1) 100 percent asphalt millings that are well graded and a product from an asphalt milling machine.

(2) 100 percent Aggregate Base Course (Class 6).

(3) Any combination of #1 and #2 above.

Milled asphalt material used shall be 100 percent passing the 37.5 mm (1-1/2 inch) sieve. Aggregate Base Course (Class 6) shall meet the requirements of

Subsection 703.03.

Unless otherwise specified, the R-value requirement shall not apply to Aggregate Base Course used for shoulder gravel. Sampling methods and testing frequency shall be in accordance with the current edition of the Field Materials Manual.

The material shall not contain clay balls, organic matter, or other deleterious material. Subsection 304.04 shall include the following:

Aggregate Base Course (Special) shall be placed using a device capable of placing this shoulder material in its final position at the required application rate. The device is subject to the Engineer's approval prior to beginning the work. Shoulder gravel shall not be placed on the asphalt roadway surface.

Subsection 304.06 shall include the following:

Aggregate Base Course (Special) shall be compacted with rollers or wheel-rolled with equipment in a manner and to the extent deemed acceptable by the Engineer.

Subsection 304.07 shall include the following:

The accepted quantities of Aggregate Base Course (Special) will be paid by the delivered Ton compacted in place as approved by the Engineer. Separate measurement will not be made.

Subsection 304.08 shall include the following:

Payment will be made under:

Aggregate Base Course (Special) Ton

Preparation of the shoulder subgrade will not be measured and paid for separately, but shall be included in the above pay item.

REVISION OF SECTION 310

FULL DEPTH RECLAMATION OF HOT MIX ASPHALT PAVEMENT

Section 310 is hereby added to the Standard Specifications as follows:

310.1 This work will be specified as a total processed depth averaging between 10-12 inches as directed by the Engineer. This work consists of cutting of the existing asphalt mat, pulverizing the existing asphalt mat, mixing the pulverized asphalt mat with the existing subgrade, existing base course or combination thereof, to the specified depth, grading and compacting the mixed material in accordance with and at locations as shown in the Contract.

This work also consists of hauling off any excess material generated above the proposed FDR surface plan elevations.

CONSTRUCTION REQUIREMENTS

310.2 The contractor shall develop a written method to maintain the centerline geometry, profile elevations, and cross slope of the existing and proposed roadway.