WR Project No. 025-029B, Project 15 August 7, 2026 100% Submittal

COLORADO DEPARTMENT OF TRANSPORTATION – SPECIAL PROVISIONS

PROJECT 15 – HARLAN ST, 32ND AVE TO 35TH AVE

SIDEWALK GAP PROGRAM

The 2025 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

Page Index Pages (August 7, 2026) 1–2 Commencement and Completion of Work (August 7, 2026) 3 Revision of Section 101 – Definition and Terms (August 7, 2026) 4 Revision of Section 102 – Project Plans and Other Data (August 7, 2026) 5 Revision of Section 105 – Order of Precedence (August 7, 2026) 6 Revision of Section 202 – Removal of Storm Structure (August 7, 2026) 7 Revision of Section 202 – Removal of Slotted Drain (August 7, 2026) 8 Revision of Section 202 – Clean Inlet (August 7, 2026) 9-10 Revision of Section 208 – Erosion Control (August 7, 2026) 11 Revision of Section 210 – Reset Landscape Wall (August 6, 2026) 12-13 Revision of Section 210 – Reset Water Meter (August 6, 2026) 14 Revision of Section 210 – Reset Fire Hydrant (August 7, 2026) 15-16 Revision of Section 210 – Reset Driveway Gravel (August 7, 2026) 17 Revision of Section 210 – Reset Fence (August 7, 2026) 18 Revision of Section 210 – Modify Manhole (August 6, 2026) 19 Revision of Section 210 – Adjust Valve Box and Water Meter (August 7, 2026) 20-21 Revision of Section 212 – Landscape Restoration (August 7, 2026) 22-25 Revision of Section 213 – Rock Mulch (Weed Free) (August 7, 2026) 26 Revision of Section 403 – Hot Mix Asphalt (August 7, 2026) 27-29 Revision of Section 601 – Backside Footer (August 6, 2026) 30 Revision of Section 604 – WR Curb Inlet (August 7, 2026) 31 Revision of Section 608 – Concrete Curb Ramp (August 7, 2026) 32 Revision of Section 608 – Concrete Stairs (August 6, 2026) 33 Revision of Section 608 – Sidewalk Drain (August 6, 2026) 34 Revision of Section 630 – Construction Traffic Control (August 7, 2026) 35-37 Force Account Items (August 7, 2026) 38 Utilities (August 7, 2026) 39-42

STANDARD SPECIAL PROVISIONS

Name Date

Pages

Revision of Sections 107 – Water Quality Control (May 16, 2024) 9

Revision of Section 201 – Clearing and Grubbing (March 19, 2026) 3

Revision of Section 203 – Excavation and Embankment (March 19, 2026) 1

Revision of Section 212 – Soil Amendments, Seeding, and

Sodding

(July 1, 2025)

Revision of Section 401 – Plant Mix Pavements – General

(Subsection 401.17) (July 1, 2025) 4

Revision of Section 601 – Pigment in Concrete (July 1, 2025) 1

Revision of Section 627 – Pavement Marking Paint (July 1, 2025) 15

Commencement and Completion of Work (Working or Calendar Day)

The Contractor shall commence work under the contract on or before the 5th day following the “Notice to Proceed” unless such time for beginning the work is changed by the City of Wheat Ridge in the “Notice to Proceed.” The Contractor shall complete all work within 90 working days per the "Notice to Proceed".

Revision of Section 101 Definitions and Terms

Revise Subsection 101.02 of the Standard Specifications for this project as follows:

Certain terms utilized in the latest edition of the Colorado Department of Transportation Standard Specifications for Road and Bridge Construction shall be interpreted to have different meanings within the scope of this Contract. A summary of redefinitions follows:

“Department” shall mean the City of Wheat Ridge or their designated representative.

“Engineer” shall mean the City of Wheat Ridge or their designated representative.

“Laboratory” shall mean the City of Wheat Ridge or their designated representative.

“Project Engineer” shall mean the City of Wheat Ridge or their designated representative.

“Region Transportation Director” shall mean the City of Wheat Ridge or their designated representative.

“State” shall mean the City of Wheat Ridge or their designated representative.

Revision of Section 102 Project Plans and Other Data

Revise Section 102 of the Standard Specifications for this project as follows:

Subsection 102.05 shall include the following:

Supplemental data is provided in LandXML and DWG file formats upon request from the City to the successful bidder. The supplemental data transmitted consists of:

a) Project Alignments - LandXML file generated of all alignments.

b) Surfaces – LandXML files of the following:

1) Existing Surface

2) Finished Grade Surface

c) DWG files:

1) Project Design Model

2) Right of Way

3) Topography

4) Additional files include – Discipline Design Files

5) Other Files – As needed per project.

The City does not warrant the supplemental data, and this information is not considered to be a part of the Contract. If the successful bidder uses or modifies the supplemental data in preparing a proposal or planning and prosecuting the work, all associated data is used at their own risk, and the bidder is responsible for all conclusions, deductions, and inferences drawn from the original or modified supplemental data.

Revision of Section 105 Order of Precedence

Revise Section 105 of the Standard Specifications for this project as follows:

Subsection 105.09 shall include the following:

These specifications, the supplemental specifications, the plans, special provisions, and all supplementary documents are essential parts of the Contract, and a requirement occurring in one is as binding as though occurring in all. They are intended to be complementary and to describe and provide for complete work.

In case of discrepancy the order of precedence is as follows:

a) Contract and City of Wheat Ridge General Conditions

b) Special Provisions

1) Project Special Provisions

2) Standard Special Provisions

c) Plans

1) Detailed Plans

2) Standard Plans and Details

3) Calculated dimensions will govern over scaled dimensions.

d) Standard Specifications

Revision of Section 202 Removal of Storm Structure

Revise Section 202 of the Standard Specifications for this project as follows:

Subsection 202.02 shall include the following:

This work includes the removal and disposal of existing storm structures at the locations shown on the plans or as directed by the Engineer. Removal shall include the entire unit, including the frame, cover, substructure and base. The cavity resulting from the removal shall be backfilled with suitable material and compacted to be level with adjacent grade per Section 203.07.

Subsection 202.11 shall include the following:

Removal of Storm Structure will be measured by the actual number of storm structures removed and accepted, regardless of size or depth.

Subsection 202.12 shall include the following:

Payment will be made under:

Pay Item Pay Unit

Removal of Storm Structure Each

Payment will be full compensation for all labor, materials, and equipment necessary to complete the work, including removal, disposal, and backfilling. Removal of frames, covers, substructures, bases, and other related components associated with the storm structure will not be measured and paid for separately but shall be included in the work.

Excavation required for removal of storm structures will not be measured and paid for separately but shall be included in the work.

Removal of Slotted Drain

Revise Section 202 of the Standard Specifications for this project as follows:

Subsection 202.02 shall include the following:

This work includes the removal and disposal of existing slotted drain at the locations shown on the plans or as directed by the Engineer. Removal shall include the entire unit, including the frame, grate, pipe, and concrete collar. The cavity resulting from the removal shall be backfilled with suitable material and compacted to be level with adjacent grade per Section 203.07.

Subsection 202.11 shall include the following:

Removal of Slotted Drain will be measured by the actual number of linear feet of slotted drain removed and accepted, measured along the centerline of the drain from end to end.

Subsection 202.12 shall include the following:

Payment will be made under:

Pay Item Pay Unit

Removal of Slotted Drain Linear Foot

Payment will be full compensation for all labor, materials, and equipment required to complete the work including removal, disposal, and backfilling. Removal of frames, grates, pipes, concrete collars, and other related components associated with the Slotted Drain will not be measured and paid for separately but shall be included in the work.

Excavation required for removal of storm structures will not be measured and paid for separately but shall be included in the work.

Clean Inlet

Revise Section 202 of the Standard Specifications for this project as follows:

Subsection 202.01 shall include the following:

This work consists of cleaning, removing, and disposing of sediment and other debris in the storm drain inlets at locations shown on the plans.

Subsection 202.10 shall include the following:

Before cleaning operations, remove and store all grates and other appurtenances from the inlet.

Perform inlet cleaning using a vacuum truck method as approved. Use a high-pressure washer to strip off all soil sediment and other debris accumulated on the structure’s walls.

Suction the mix of water and debris out of the structure and into the vacuum truck. Dispose of removed material at a suitable facility located off the project site per applicable regulations and guidelines. The remaining material left in the structure after cleaning shall be removed at the Contractor’s expense. Document and provide in writing the total amount of material removed.

Replace all damaged or missing bolts for the grates and other appurtenances. Upon completing cleaning, treat existing and new bolts required for the grates and other appurtenances with anti-seize compound. Then, reinstall the grate and appurtenances using the treated bolts.

If debris accumulates in clean structures during construction, reclean structures at the Contractor’s expense.

Subsection 202.11 shall include the following:

Measure Clean Inlet by the actual number of existing inlets that are cleaned and accepted.

Cleaning of drainage pipe between inlets, barrier drain holes, and flaps, when required, will not be measured or paid for separately; include it in the work price.

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Clean Inlet

Subsection 202.12 shall include the following:

Pay under:

Pay Item Pay Unit

Clean Inlet Each

Payment will consist of full compensation for all labor, materials, and equipment required to clean, maintain, remove, and dispose of sediment and other debris from storm drain inlets prior to construction.

The amount of anti-seize compound and new bolts required will not be measured and paid for separately; include it in the work price.

The quantity of debris and water disposal will not be measured and paid for separately;

include it in the work price.

The amount of water required for pressure washing will not be measured and paid for separately; include it in the work price.

Revision of Section 208 Erosion Control

Revise Section 208 of the Standard Specifications for this project as follows:

Subsection 208.01 shall include the following:

The City of Wheat Ridge Stormwater Quality and Control Ordinance shall govern erosion control procedures. Temporary erosion control measure materials and construction requirements shall be adhere to the specifications detailed in Mile High Flood District’s Urban Storm Drainage Criteria Manual. In instances where the Ordinance or Manual does not provide specific guidance, CDOT Standard Specification Section 208 shall be used as a supplemental reference.

Revision of Section 210 Reset Landscape Wall

Revise Section 210 of the Standard Specifications for this project as follows:

Subsection 210.01 shall include the following:

This work consists of removing, storing, and resetting existing masonry block landscape walls at the location shown on the plans.

Subsection 210.02 shall include the following:

The Contractor is to coordinate with the private property owner prior to work.

Documentation of the coordination and of the existing conditions through photographs and written inventory shall be submitted to the Engineer prior to beginning work.

The Contractor shall remove masonry blocks with care to prevent damage. Blocks designated for reuse shall be cleaned of residue, stacked, and stored in a manner that prevents breakage, chipping, or surface damage.

Blocks damaged during removal, storage, or reinstallation shall be replaced with new material. Replacement masonry blocks shall match the existing wall in material, color, texture, and nominal dimensions. The Contractor shall submit a sample block to the Engineer for review and approval prior to installation.

The Contractor shall reset the wall at the location shown and detailed in the plans. The reset wall shall meet the following requirements upon completion:

(1) Vertical joints shall not align in consecutive rows.

(2) Gaps between blocks shall not exceed ½ inch.

(3) A masonry adhesive shall be applied between rows, if directed by the Engineer.

Masonry adhesives shall be compatible with the block type and shall be applied in accordance with the manufacturer's written instructions.

(4) The top of wall shall be flush with adjacent, existing wall.

(5) The finished wall shall be free of displaced, cracked, or visibly damaged blocks, and shall seamlessly tie into existing, adjacent walls.

Existing blocks that are not reinstalled shall be salvaged to the property owner or disposed of at the Contractor’s expense.

The Contractor shall protect the reset wall from damage.

Reset Landscape Wall

Subsection 210.12 shall include the following:

Reset Landscape Wall will be measured by the linear foot of wall installed and accepted.

Subsection 210.13 shall include the following:

Payment will be made under:

Pay Item Pay Unit

Reset Landscape Wall Linear Feet

Payment shall be full compensation for all labor, materials, and equipment required to remove, clean, store, and reset the masonry block landscape wall, including pre-construction documentation. Replacement blocks, adhesive, and all incidental materials required to complete the reset will not be measured or paid for separately but shall be included in the work.

Reset Water Meter

Revise Section 210 of the Standard Specifications for this project as follows:

Subsection 210.02 shall include the following:

This work consists of resetting water meters, vaults, and associated appurtenances as well as modifying and replacing existing water service lines as shown in the plans.

The Contractor shall submit detailed work plans, including schedules and methods for resetting the water meter vaults and replacing the service lines. This work plan shall include product data for all materials to be used. The work plans shall be reviewed and approved by Wheat Ridge Water District (water authority) prior to commencing work.

The Contractor shall coordinate with the water authority prior to performing work.

Coordination shall include delegation of work as the water authority may elect to perform a portion of the work. The Contractor shall be familiar with Wheat Ridge Water District standards and specifications as well as Denver Water Capital Project Construction Standards (Latest Edition). The former can be made available upon request.

Subsection 210.12 shall include the following:

Resetting water meters shall include all work necessary to remove the meters from their existing location to the new location with acceptance by the water authority. This work shall include all removal of existing service lines and installation of new service lines.

Subsection 210.13 shall include the following:

Payment will be made under:

Pay Item Pay Unit

Reset Water Meter Each

Payment will consist of full compensation for all labor, materials, and equipment required to coordinate with the water authority, excavate, relocate / install new meter vaults, remove existing service line pipe, install new service line pipe, and backfill as required to satisfy the water authority having jurisdiction.

Reset Fire Hydrant

Revise Section 210 of the Standard Specifications for this project as follows:

Subsection 210.01 shall include the following:

This work consists of relocating fire hydrants by removing existing pipe, valve, and hydrant and installing new hydrant as shown on the plans or as designated by the Engineer.

Subsection 210.02 shall include the following:

Reset Fire Hydrant shall be completed in accordance with Denver Water Capital Projects Construction Standards and Engineering Specifications (Latest Edition). A copy of the standards and specifications will be provided upon written request.

The Contractor shall coordinate with Denver Water prior to and throughout the performance of this work. All work shall be subject to inspection and approval by Denver Water.

The proposed fire hydrant location shown on the plans is approximate. The Contractor shall submit a fire hydrant relocation plan to Denver Water and Engineer for review and approval prior to work. Fire hydrant placement shall be in accordance with Denver Water requirements.

The Contractor shall remove the existing fire hydrant and deliver it to Denver Water for salvage. The Contractor shall remove and dispose of the existing lateral pipe, riser pipe, gate valve, valve box, and appurtenances from the existing fire hydrant to the existing tee connection at the water mainline. The existing tee at the mainline shall be protected in place. If the existing tee is damaged during construction operations, the Contractor shall repair or replace the tee at no additional expense.

The Contractor shall furnish and install new hydrant lateral pipe, riser pipe, gate valve, valve box, bedding, fire hydrant, restrained joint parts and other appurtenances from the existing tee at the mainline to the new fire hydrant location shown on the plans, in accordance with Denver Water Construction Standard 33206.

Subsection 210.12 shall include the following:

Reset Fire Hydrant will be measured by the number of fire hydrants installed and accepted by Denver water.

Reset Fire Hydrant

Subsection 210.13 shall include the following:

Payment will be made under:

Pay Item Pay Unit

Reset Fire Hydrant Each

Reset Fire Hydrant includes all material, labor, and equipment necessary to remove and install a functioning fire hydrant to the satisfaction of Denver Water.

Excavation, bedding, backfill, compaction, surface restoration, testing, and coordination with Denver Water will not be measured and paid for separately but shall be included in the work.

Reset Driveway Gravel

Revise Section 210 of the Standard Specifications for this project as follows:

Subsection 210.01 shall include the following:

This work consists of removing, stockpiling, and placing Driveway Gravel in areas indicated on the plans or as designated by the Engineer.

Subsection 210.02 shall include the following:

The Contractor shall exercise care during removal to avoid loss, contamination, or damage to the existing gravel. Existing gravel shall be stockpiled at a location approved by the Engineer in a manner that prevents contamination or mixing with other materials.

If not enough competent gravel can be salvaged for reuse, the Contractor shall procure gravel that visually matches the existing adjacent gravel in type, color, and size. The Contractor shall submit a physical sample of the gravel to the City for review and approval prior to use on site.

Gravel shall be placed in accordance with the plans. Any disturbed or contaminated areas shall be reworked at the Contractor’s expense.

Subsection 210.12 shall include the following:

Reset Driveway Gravel will be measured by the square foot installed and accepted.

Subsection 210.13 shall include the following:

Payment will be made under:

Pay Item Pay Unit

Reset Driveway Gravel Square Foot

Reset Fence

Revise Section 210 of the Standard Specifications for this project as follows:

Subsection 210.01 shall include the following:

This work consists of removing and resetting existing fence and posts at the locations shown on the plans. This work also includes removing existing concrete post footings, installing new concrete post footings, replacing materials determined to be unserviceable, and repainting surfaces damaged during reset operations.

Subsection 210.02 shall include the following:

Materials determined by the Engineer to be unserviceable prior to resetting shall be replaced in kind. All replacement materials shall match the existing material in type, size, and finish.

Subsection 210.12 shall include the following:

The Contractor shall remove and stockpile all fence components in a manner that prevents damage. Existing concrete post footings shall be removed and disposed of. Voids resulting from footing removal shall be backfilled and compacted per Section 206.

Fence and post installation shall conform to Section 607. Posts that were installed in concrete footings in the existing condition shall be reset in new concrete footings. Top of concrete footings shall be flush with finished grade. Where concrete footings do not exist, posts shall be driven into the ground. All posts shall be able to fully support the fence and shall be set plumb.

After the fence is fully reset, the Contractor shall repaint all surfaces on which paint was damaged during removal or reset operations, as directed by the Engineer. Paint shall match the color and finish of undamaged fence materials and shall be applied to achieve a uniform coat free of blemishes, discontinuities, or bare edges. Repainting is not required for undamaged surfaces. Existing material that is not reinstalled shall be salvaged to the property owner or disposed of at the Contractor’s expense.

Subsection 210.13 shall include the following:

Payment will be made under:

Pay Item Pay Unit

Reset Fence Linear Foot

Payment will be full compensation for all labor, materials, and equipment required to complete the reset, including footing removal, new footings, material replacement, and repainting.

Modify Manhole

Revise Section 210 of the Standard Specifications for this project as follows:

Subsection 210.01 shall include the following:

This work consists of modifying existing manholes as shown in the Plans, including removing existing pipes, installing a new larger pipe into the wall of an existing structure, and sealing an abandoned pipe opening.

Subsection 210.02 shall include the following:

Concrete steel shall conform to 601.

Reinforcing steel shall conform to 709.

Subsection 210.12 shall include the following:

The Contractor shall remove existing pipes designated for removal as shown on the Plans.

The Contractor shall prevent tools, concrete, debris, or other material from falling into the flow channel of the existing manhole. Clean or remove debris from the downstream sewer that enters as a result of the Contractor's operations.

For new pipe installations, the Contractor shall install the new pipe into the wall of the existing manhole as detailed in the Plans. Work shall include core drilling or saw-cutting the wall opening, placing reinforcing steel, forming, placing concrete, and grouting with non-shrink grout as required by the detail in the Plans. All materials and methods shall conform to Section 601 for concrete work. The pipe connection shall result in a watertight connection.

For abandoned pipe openings, the Contractor shall plug and seal the opening in a manner that creates a watertight seal and provides a flush finish on the interior manhole wall surface.

The Contractor shall adjust the frame and cover to be flush with finished grade.

Subsection 210.13 shall include the following:

Payment will be made under:

Pay Item Pay Unit

Modify Manhole Each

Payment will consist of full compensation for all labor, materials, and equipment required to complete the work as shown in the Plans, including, but not limited to, core drilling or saw-cutting, forming, reinforcing steel, concrete, non-shrink grout, excavation and backfill, and all incidental work necessary to modify the manhole as described.

Adjust Valve Box and Water Meter

Revise Section 210 of the Standard Specifications for this project as follows:

Subsection 210.10 shall include the following:

This work consists of adjusting existing water meter pits and valve boxes to finished grade at the locations shown on the plans or as directed by the Engineer.

The Contractor shall coordinate with Wheat Ridge Water District (Owner) prior to commencing work to determine material and construction requirements.

Prior to commencing construction, the Contractor shall coordinate and conduct with the utility owner, an inspection of all impacted valve boxes and water meters. The purpose of this inspection will be to account for all valve boxes and water meters involved in the construction and determine their accessibility and condition. The Contractor shall provide traffic control for this inspection and for the final inspection. The Contractor shall coordinate construction with the Owner to allow sufficient time for the Owner to make all necessary repairs to valve boxes and water meters before construction begins in the area of the valve boxes and water meters. All parties shall agree on the condition of each valve box and water meter prior to construction.

The Contractor shall replace all valve box sections damaged or misplaced during construction with new valve box sections complying with the requirements of the Owner’s specifications. The Contractor shall set each valve box to be adjusted so that it is ¼ inch to ½ inch below the final grade of the paved surface, or to the satisfaction of the Owner, and so that it is plumb over the operating nut of the valve.

Water meter adjustments are limited to raising or lowering the meter pit flush with finished grade. The water meter, service lines, and all other components of the water service shall not be disturbed. Water meter relocations will be measured and paid for as "Reset Water Meter".

Prior to the final inspection, the Contractor shall thoroughly clean all valve boxes designated for adjustment. This work shall not be paid for separately but shall be included in the cost of the work to adjust the valve box.

The Contractor shall coordinate and conduct, with the Owner, a final inspection upon completion of construction. This inspection shall assure that all valve boxes and water meters are in compliance with these requirements.

Adjust Valve Box and Water Meter

Subsection 210.12 shall include the following:

The Contractor will be paid separately for each valve box or water meter adjustment, completed and accepted.

Subsection 210.13 shall include the following:

Payment will be made under:

Pay Item Pay Unit

Adjust Valve Box Each Adjust Water Meter Each

Payment will be full compensation for all labor, materials, and equipment required to complete the reset, including footing removal, new footings, material replacement, and repainting.

Revision of Section 212 Landscape Restoration

Revise Section 212 of the Standard Specifications for this project as follows:

Subsection 212.01 shall include the following:

This work consists of furnishing all labor, materials, equipment, and services necessary to protect or restore landscaped areas to their pre-project condition at the conclusion of construction.

Landscape restoration shall include protecting, resetting, or replacing plants, grasses, rock and wood mulch, landscape rock, lawn furnishings, boulders, landscape edging, and similar improvements. This work shall include the protection of trees and shrubs, trimming of plants damaged by the Contractor's operations, removal of shrubs and bushes as shown on the Plans or directed by the Engineer, trimming of trees, shrubs, and bushes as shown on the Plans or directed by the Engineer, replacement of seriously damaged vegetation. Additionally, this work shall consist of salvaging, stockpiling, maintaining, and placing existing topsoil at seeded areas shown on the plans.

This work shall also include furnishing and placing ground cover materials at currently non-landscaped areas within the limits of disturbance as shown on the Plans. The type of ground cover, including rock mulch, wood chip mulch, or seeding, shall be determined by the Engineer prior to placement. The Contractor shall not place ground cover in non-landscaped disturbed areas without written approval from the Engineer.

This work shall also include protecting, adjusting, extending, and repairing existing irrigation systems to restore irrigation systems to irrigate grass areas and plantings, resetting or replacing irrigation boxes and sprinkler heads, and capping irrigation lines, where required.

All irrigation work shall conform to Section 623.

The Contractor is to coordinate with the private property owner prior to commencing ground disturbing activities to coordinate approach to landscape restoration and schedule outages, if applicable. Documentation of the coordination and of the existing conditions through photographs and written inventory shall be submitted to the Engineer prior to beginning work.

Subsection 212.02 shall include the following:

(a) Seed. Seed shall match the pre-existing species within the area of disturbance. The Contractor shall conduct a field investigation to identify existing species prior to any ground-disturbing activity and shall submit a proposed seed mix to the Engineer for written approval prior to seeding. If pre-existing species cannot be determined through field investigation, the Contractor shall submit an alternative seed mix proposal to the Engineer for written approval prior to seeding. Seed shall be free of noxious weeds.

Landscape Restoration

(b) Rock Mulch (Weed Free). New rock mulch shall be clean, durable, and resistant to weathering and disintegration. All material shall be certified weed free, free of organic matter, soil, and other deleterious substances. The Contractor shall submit a physical sample of the rock mulch to the City for review and approval prior to use on site.

(c) Wood Chip Mulch. Sources of mulch should be free of weeds and invasive plant parts or seeds. Sawdust, dirt, garbage, or other debris mixed in the mulch is not acceptable. The Contractor shall submit a physical sample of the rock mulch to the City for review and approval prior to use on site.

(d) Soil Amendments and Fertilizers. The Contract shall select applicable topsoil amendments and fertilizers promote growth of seeded areas.

Subsection 212.04 shall include the following:

The Contractor shall place salvaged topsoil at areas designated for seeding in conformance with Section 207. The Contractor shall incorporate soil amendments into the topsoil to a minimum depth of 6 inches.

Seeded areas shall achieve a minimum uniform vegetative cover of 70 percent plant density relative to adjacent undisturbed seeded areas within 12 months of initial seeding. The Engineer will determine whether the 70 percent establishment threshold has been achieved prior to final acceptance. The Contractor shall reseed and re-amend areas failing to achieve this threshold at no additional cost.

Add subsection 212.061 immediately following subsection 212.06 as follows:

(a) Lawn Furnishings. Existing lawn furnishings, including edging, borders, pavers, and decorative features, shall be carefully removed, stockpiled, and protected from damage. Care shall be taken to not damage landscape materials during removal.

Furnishings shall be reset in their original configuration, or as directed by the property owner, upon completion of adjacent construction. Items damaged during Contractor operations shall be replaced in kind at the Contractor's expense.

Furnishings that are not reset shall be salvaged to the property owner.

(b) Plants. If plants are damaged as identified by the Engineer, the Contractor shall replace in kind at no additional cost to the project.

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Landscape Restoration

(c) Landscape Rock. If rock is damaged or contaminated as identified by the Engineer, the Contractor shall replace in kind at no additional cost to the project.

(d) Rock and Wood Mulch. Existing mulch within the limits of disturbance shall be removed, stockpiled, and protected from contamination and loss prior to construction. Care shall be taken to separate rock mulch from subgrade soils during removal. Following completion of adjacent construction, rock mulch shall be reset to match the pre-existing depth, color, gradation, and type within the disturbed area.

Mulch that is contaminated, lost, or damaged during the Contractor's operations shall be replaced in kind at no additional cost. Any disturbed or contaminated areas shall be reworked and remulched at the Contractor's expense.

New rock and wood chip mulch shall be placed to a minimum uniform depth of 3 inches. The Contractor shall ensure that the mulch is evenly distributed and compacted to prevent settling and displacement. The finished surface shall be placed flush with or slightly below adjacent hardscape edges to prevent migration.

(e) Trimming. Prior to beginning any construction, removal, trimming, and pruning of encroaching vegetation as shown on the Plans or directed by the Engineer shall be completed. Once all directed clearing, trimming, and pruning is completed and accepted, no additional clearing, trimming, cutting, or pruning will be allowed unless approved, in writing, by the Engineer.

This work shall be done by a Contractor or subcontractor who is qualified in vegetation management. All work shall be done according to the following requirements:

(1) Pruning shall be done with proper, sharp, clean tools in such a manner as to preserve the natural character of the plant.

(2) Tools used on plants known or found to be diseased, shall be disinfected with alcohol before they are used on other plants.

(3) When reducing size (cut back or topping) not more than one-third of the total area shall be reduced at a single operation.

Landscape Restoration

(4) All removed vegetation shall become the property of the Contractor and shall be hauled away and disposed of by the Contractor.

Damage to the plant resulting from improper pruning or trimming may result in the Contractor being required to replace the plant at their expense or be liable for the value of the plant.

Subsection 212.07 shall include the following:

Landscape Restoration will be paid for on a lump sum basis for the entire project.

Subsection 212.08 shall include the following:

Payment will be made under:

Pay Item Pay Unit

Landscape Restoration Lump Sum

Payment will consist of full compensation for all labor, materials, and equipment required to restore landscape areas and re-establish irrigation systems.

Topsoil, subsoil preparation, soil amendments, and fertilizers for seeded areas will not be measured and paid for separately but shall be included in the work.

If irrigation systems are impacted, temporary irrigation required while irrigation systems are offline will not be paid separately but is included in the cost of the work. If irrigation system shut off during construction results in damage to additional grass or landscape areas beyond the limits of disturbance, contractor shall replace in kind. This work shall be incidental to the cost of Landscape Restoration.

Ground cover materials furnished and placed at currently non-landscaped areas, as directed by the Engineer, will not be measured and paid for separately but shall be included in the cost of Landscape Restoration.

All tests, documentation, and surveys required for the work will not be measured and paid for separately but shall be included in the work.

Removal of shrubs and bushes and trimming of trees, shrubs, and bushes will not be measured and paid for separately but shall be incidental to the cost of Landscape Restoration.

Revision of Section 213 Rock Mulch (Weed Free)

Revise Section 213 of the Standard Specifications for this project as follows:

Subsection 213.01 shall include the following:

This work consists of furnishing and placing Rock Mulch (Weed Free) in areas indicated on the plans or as designated by the Engineer. In areas with existing rock mulch, this work includes removing, stockpiling, and resetting rock mulch.

Subsection 213.02 shall include the following:

Rock mulch shall be certified weed free, free of organic matter, soil, and other deleterious substances. Rock shall be clean, durable, and resistant to weathering and disintegration.

In areas of existing rock mulch and where additional material is required, the Contractor shall procure rock mulch that visually matches the existing adjacent rock mulch in type, color, and size. In areas with no adjacent rock mulch, the Contractor shall coordinate with the Engineer to determine rock mulch type. The Contractor shall submit a physical sample of the rock mulch to the City for review and approval prior to use on site.

Subsection 213.03 shall include the following:

The Contractor shall exercise care during removal to avoid loss, contamination, or damage to the existing rock mulch. Existing rock mulch shall be stockpiled at a location approved by the Engineer in a manner that prevents contamination or mixing with other materials.

Rock mulch shall be placed to a minimum depth of 3 inches after compaction and leveling over a landscape fabric suitable for use as a weed barrier. The finished surface of the mulch shall be depressed 2 inches below adjacent curbs, sidewalks, and hardscape edges to prevent migration. The Contractor shall ensure that the mulch is evenly distributed and compacted to prevent settling and displacement. Any disturbed or contaminated areas shall be reworked and remulched at the Contractor’s expense.

Subsection 213.04 shall include the following:

Rock Mulch (Weed Free) will be measured by the square foot installed and accepted.

Subsection 213.05 shall include the following:

Payment will be made under:

Pay Item Pay Unit

Rock Mulch (Weed Free) Square Foot

Payment will consist of full compensation for all labor, materials, and equipment required to remove, stockpile, place and rock mulch with landscape fabric in areas shown on the Plans.

Revision of Section 403 Hot Mix Asphalt

Revise Section 403 of the Standard Specifications for this project as follows:

Subsection 403.02 shall include the following:

The design mix for hot mix asphalt shall conform to the following:

Table 403-1

Property Test Method Value For Grading

Patching

SX (75) S (75)

Air Voids, percent at:

N (design)

CPL 5115 3.5 – 4.5 3.5 – 4.5

Lab Compaction (Revolutions):

N (design)

CPL 5115 75 75

Stability, minimum CPL 5106 28 28

Aggregate Retained on the 4.75 mm (No. 4) Sieve for S, SX and SG, and on the 2.36mm (No. 8) Sieve for ST and SF with at least 2 Mechanically Induced fractured faces, % minimum*

CP 45 60 90

Accelerated Moisture Susceptibility Tensile Strength Ratio (Lottman), minimum

CPL 5109

Method B

80 80

Minimum Dry Split Tensile Strength, kPa (psi)

CPL 5109

Method B

205 (30) 205 (30)

Grade of Asphalt Cement, All Layers PG 64-22 PG 64-22

Voids in the Mineral Aggregate (VMA) % minimum

CP 48

See Table

403-2 See Table

403-2

Voids Filled with Asphalt (VFA), % AI MS-2 65 - 80 65 - 80

Dust to Asphalt Ratio Fine Gradation Coarse Gradation

CP 50

0.6 – 1.2

0.8 – 1.6

0.6 – 1.2

0.8 – 1.6

Note: AI MS-2 = Asphalt Institute Manual Series 2 Note: Mixes with gradations having less than 40% passing the 4.75 mm (No. 4) sieve shall be approached with caution because of constructability problems.

Note: Gradations for mixes with a nominal maximum aggregate size of one-inch or larger are considered a coarse gradation if they pass below the maximum density line at the #4 screen.

Gradations for mixes with a nominal maximum aggregate size of 3/4” to 3/8” are considered a coarse gradation if they pass below the maximum density line at the #8 screen.

Gradations for mixes with a nominal maximum aggregate size of #4 or smaller are considered a coarse gradation if they pass below the maximum density line at the #16 screen.

*Fractured face requirements for SF may be waived by RME depending on project conditions.

Hot Mix Asphalt

All mix designs shall be run with a gyratory compaction angle of 1.25 degrees and properties must satisfy Table 403-1. Form 43 will establish construction targets for Asphalt Cement and all mix properties at Air Voids up to 1.0 percent below the mix design optimum. CDOT will establish the production asphalt cement and volumetric targets based on the Contractor’s mix design and the relationships shown between the hot mix asphalt mixture volumetric properties and asphalt cement contents on the Form 429. CDOT may select a different AC content other than the one shown at optimum on the Contractor’s mix design in order to establish the production targets as contained on the Form 43. Historically, Air Voids adjustments typically result in asphalt cement increases from 0.1 to 0.5 percent.

Contractors bidding the project should anticipate this change and factor it into their unit price bid.

Table 403-2

Minimum Voids in the Mineral Aggregate (VMA)

Nominal Maximum Size*, mm (inches)

***Design Air Voids **

3.5% 4.0% 4.5% 5.0%

37.5 (1½) 11.6 11.7 11.8 N/A

25.0 (1) 12.6 12.7 12.8 N/A

19.0 (¾) 13.6 13.7 13.8 N/A

12.5 (½) 14.6 14.7 14.8 N/A

9.5 (⅜) 15.6 15.7 15.8 N/A

4.75 (No. 4) 16.6 16.7 16.8 16.9

* The Nominal Maximum Size is defined as one sieve larger than the first sieve to retain more than 10%.

** Interpolate specified VMA values for design air voids between those listed.

*** Extrapolate specified VMA values for production air voids beyond those listed.

Hot Mix Asphalt

The Contractor shall prepare a quality control plan outlining the steps taken to minimize segregation of HMA. This plan shall be submitted to the Engineer and approved before beginning the paving operations. When the Engineer determines that segregation is unacceptable, the paving shall stop and the cause of segregation shall be corrected before paving operations will be allowed to resume.

Hot mix asphalt for patching shall conform to the gradation requirements for Hot Mix Asphalt (Grading SX and S).

Acceptance samples shall be taken CP 41 Method B.

Delete subsection 403.05 and replace with the following:

403.05 The accepted quantities of hot mix asphalt will be paid for per subsection 401.22, at the contract unit price per ton for the bituminous mixture.

Payment will be made under:

Hot Mix Asphalt (Patching)(Asphalt) Ton

Aggregate, asphalt recycling agent, asphalt cement, additives, hydrated lime, and all other work and materials necessary to complete each hot mix asphalt item will not be paid for separately but shall be included in the unit price bid. When the pay item includes the PG binder grade, any change to the submitted mix design optimum asphalt cement content to establish production targets on the Form 43 will not be measured and paid for separately but shall be included in the work. No additional compensation will be considered or paid for any additional asphalt cement, plant modifications and additional personnel required to produce the HMA as a result in a change to the mix design asphalt cement content.

Historically, typical asphalt cement increases reflected on the Form 43 are from 0.1 to 0.5 percent. However, the Contractor should anticipate the AC increases typical of his mixes.

Contractors bidding the project should anticipate this change and factor it into their unit price bid.

When the pay item does not include the PG binder grade, asphalt cement will be measured and paid for per Section 411. Asphalt cement used in Hot Mix Asphalt (Patching) will not be measured and paid for separately but shall be included in the work.

Excavation, preparation, and tack coat of areas to be patched will not be measured and paid for separately but shall be included in the work.

Revision of Section 601 Backside Footer

Revise Section 601 of the Standard Specifications for this project as follows:

Subsection 601.01 shall include the following:

Backside Footer shall consist of constructing a reinforced thickened slab and retaining wall adjacent to the sidewalk in accordance with the details shown in the plans. The Backside Footer shall be placed monolithically with the sidewalk. The Engineer shall inspect reinforcement prior to concrete placement.

Subsection 601.03 shall include the following:

Reinforcing steel shall be grade 60.

Concrete shall be class B or D.

Subsection 601.19 shall include the following:

Backside Footer will be measured by the actual number of square feet constructed and accepted. Measurement shall be based on the plan area of the Backside Footer, including the retaining wall and adjacent thickened slab section, as shown in the plans. No additional measurement will be made for reinforcing steel, wall height, excavation, backfill, or other incidental work.

Subsection 601.20 shall include the following:

Payment will be made under:

Backside Footer Square Foot

Revision of Section 604 WR Curb Inlet

Revise Section 604 of the Standard Specifications for this project as follows:

Subsection 604.01 shall include the following:

This work consists of the construction of WR Curb Inlet per the City of Wheat Ridge Standard Detail U-C01 and U-C03.

WR = Wheat Ridge

Subsection 604.06 shall include the following:

Depth will not be measured for payment for WR Curb Inlet.

Subsection 604.07 shall include the following:

Payment will be made under:

Pay Item Pay Unit

WR Curb Inlet (Single) Each WR Curb Inlet (Triple) Each

Revision of Section 608 Concrete Curb Ramp

Revise Section 608 of the Standard Specifications for this project as follows:

Subsection 608.01 shall include the following:

This work includes the installation of detectable warnings on concrete curb ramps as shown on the plans.

Subsection 608.02 shall include the following:

Detectable warnings on curb ramps shall be truncated domes of the dimensions shown on the plans or on Standard Plan M-608-1 Curb Ramps.

The final surface shall meet the requirements given in R305 of the PROWAG. The domes and their underlying surface shall contrast visually with adjacent gutter, street or highway, or pedestrian access route surface, either light-on-dark or dark-on light, per R305.1.3 of the PROWAG. The contrasting colors shall not be black and white.

Material for the truncated domes shall be cast iron embeddable surface plates. The domes shall be prefabricated by the manufacturer as a pattern on embeddable surface plates.

Plates shall be one of the cast iron plates allowed for use as detectable warnings listed on CDOT’s Approved Products List. Prior to the start of work, the Contractor shall submit appropriate documentation from the manufacturer verifying that the required contrast has been met, along with a sample plate to the Engineer for approval.

Subsection 608.03 shall include the following:

Prior to installation of the plates, concrete conforming to subsection 608.02 shall be installed and consolidated as a base for the plates. The concrete shall be placed to a thickness that will allow the base surface of the plates to be at the same elevation as the adjacent concrete. The plates shall be embedded into the plastic concrete in accordance with the manufacturer’s specifications.

Subsection 608.06 shall include the following:

Payment will be made under:

Pay Item Pay Unit

Concrete Curb Ramp Square Yard

Detectable warnings on curb ramps, including sand, plates, and all other work and materials necessary for fabrication, transport, and installation will not be measured and paid for separately, but shall be included in the work.

Concrete Stairs

Revise Section 608 of the Standard Specifications for this project as follows:

Subsection 608.01 shall include the following:

This work includes constructing cast-in-place concrete stairs as shown on the plans.

Subsection 608.02 shall include the following:

Concrete for concrete stairs shall be class B and meet the requirements of section 601.

Subsection 608.03 shall include the following:

(a) Forms. Stairs shall be constructed to the tread depth, riser height, and width as shown in the plans. Tread surfaces shall slope between 1 and 2 percent for drainage.

(b) Placing Concrete. Concrete shall be placed at a minimum thickness of 6-inches at any point.

Subsection 608.05 shall include the following:

Concrete Stairs will be measured by the square foot of tread surface area completed and accepted.

Subsection 608.06 shall include the following:

Payment will be made under:

Pay Item Pay Unit

Concrete Stairs Square Foot

Payment is full compensation for all labor, materials, and equipment required to complete the work, including excavation, forming, concrete, finishing, curing, and all incidentals.

Sidewalk Drain

Revise Section 608 of the Standard Specifications for this project as follows:

Subsection 608.01 shall include the following:

This work consists of constructing sidewalk drains in accordance with the details shown on the plans and as directed by the Engineer.

Subsection 608.02 shall include the following:

Concrete for sidewalk drains shall be Class B and meet the requirements of Section 601.

Steel components shall meet the requirements of Section 509.

Subsection 608.03 shall include the following:

Sidewalk drains shall be constructed in accordance with City of Wheat Ridge Standard Detail U-A01 and as shown in the plans. This includes:

Installation of tread plate flush with the sidewalk surface.

Ensuring slope and drainage conform to the Standard Detail and the Plans.

All components must be installed to maintain structural integrity and drainage functionality.

Concrete gutter work downstream of the sidewalk drain, as required to ensure proper drainage, shall conform to the applicable requirements of Section 609.

Subsection 608.05 shall include the following:

The quantity to be measured for Sidewalk Drain will be the actual number installed and accepted in accordance with the plans.

Subsection 608.06 shall include the following:

Payment will be made under:

Pay Item Pay Unit

Sidewalk Drain Each

Concrete drain pans downstream of the sidewalk drain, as shown in the plans, will not be paid separately and shall be included in the work.

Revision of Section 630 Construction Traffic Control

Revise Section 630 of the Standard Specifications for this project as follows:

Subsection 630.02 shall include the following:

All traffic control devices shall conform to the most…