ENGINEERING DEPARTMENT

City of New Haven

200 Orange Street, Rm 503

New Haven, CT 06510 www.cityofnewhaven.com

Justin Elicker Mayor

Giovanni Zinn, P.E.

City Engineer

Mill River Trail City Project No. 14-118-01

NOTICE TO CONTRACTOR – CONTRACT DOCUMENTS

The contractor is hereby notified this project will be in accordance with the Connecticut Department of

Transportation Standard Specifications for Roads, Bridges, Facilities and Incidental Construction Form

818 dated 2020, Divisions I, II, and III. The standard Form 818 is supplemented by these special provisions and supplemental specifications.

The General Conditions of the City Rev. 1 of New Haven dated 2009 are also incorporated into this contract by reference and can be found on the City’s Purchasing Department Website at the following link: http://www.cityofnewhaven.com/civicax/filebank/blobdload.aspx?BlobID=25068 In the event of a conflict between these documents the more stringent specification will apply. If a conflict is found between these documents and the plan sheets the engineer should be notified and will make a ruling.

Item #1-1

Removable Bollard

Description:

Work under this item shall consist of excavation, furnishing, installing, and backfilling a removable bollard in locations as specified by plan sheets.

Materials:

Bollards shall be six inch (6”) diameter galvanized steel with two applications of high visibility yellow epoxy paint coating.

Contractor must submit proposed product for approval prior to purchase.

Construction Methods:

Contract should stake limits of trail and locations of bollards must be approved by engineer prior to start of excavation. Bollards must be set in concrete, and installation performed per manufacturer’s literature.

Method of Measurement:

Removable bollards will be measured by each bollard furnished, installed, and accepted.

Basis of Payment:

This work will be paid at the contract unit price per each for “Removable Bollard” which price shall include all excavation, disposal, equipment, material, tools and labor incidental thereto.

Item #1-2

12’ WIDE TRAIL

Description:

Work under this item shall consist of excavation for the proposed trail, furnishing, placing and compacting subbase and stone mix along the path per the typical sections on sheet D1.

Materials:

Subbase material shall conform to M.02.02 and M.02.06 of the Standard Specification Form 818.

Process shall conform to section M.05.01 of the Standard specifications Form 818.

Hot mix asphalt shall be S0.25 per section M.04.01 of the Standard specifications Form 818.

Construction Methods:

Excavation should be performed in a controlled manner after grading stake out. Excavated material free of organics should be reused onsite in areas determined by the contractor to require fill to meet ADA grade requirements. No material should be allowed to enter the Mill River or negatively affect the embankment.

Refer to section 2.12.03 for the Standard Specification Form 818 for construction methods and requirements for placing subbase, stone mix, and stone dust topping.

Each layer (i.e. subbase, process, HMA) must be compacted prior to placing the next material layer.

Method of Measurement:

12’ Wide trail will be measured by the square yard of neat line completed and accepted trail. If deficiencies in thickness of individual layers are found the area will be reduced by a ratio of in-place layer height to proposed height.

Basis of Payment:

This work will be paid at the contract unit price per square yard for “12’ Wide Trail” which price shall include all excavation, disposal, equipment, aggregate material, tools and labor incidental thereto.

Item #1-3

12x12 TIMBER CURB Description:

Work under this item consists of exaction, furnishing and installing 12”x12” pressure treated timber curbing with stakes on compacted subbase, and grading the earth directly behind the curbing for a width not to exceed 4’. The timber curbing will be placed as directed by the engineer once the contractor has completed construction staking and can clearly show the limits of the proposed trail. The timber curbing will be used in locations of minor grade change adjacent to the path ranging from 1’ to 3’.

Materials:

Contractor must submit product information prior to purchase for timber, stakes and wood filler.

Timber must be pressure treated sound material free of warping, checks and splits.

Stakes must be zinc coated.

Wood filler should be weather proof, rated for outdoor UV exposure.

Subbase shall conform to section M.02.02 and M.02.06 of the Standard Specification Form 818.

Construction Methods:

Excavation, if necessary, must be performed in a controlled manner removing and disturbing the minimum area of existing slope possible to install curbing.

Subbase shall be installed in accordance with section 2.12.03 of the Standard Specification Form 818.

Timber curbing shall be laid flat end to end with spikes driven every 4’ on center. If curbing is stacked it shall be laid in running bond. A 1’ wide strip of earth shall be compacted without slope directly behind the top of the timber curbing, and a slope of 1:3 for 3’.

Method of Measurement:

Timber curbs will be measured by the length of 12”x12” timber curb installed and accepted. In locations that timbers are stacked each member will be measured separately for payment.

Basis of Payment:

This work will be paid for at the contract unit price per linear foot for “12x12 Timber Curb” which price shall include all materials, excavation, grading, subbase, compaction, backfilling, equipment, tools and labor, incidental thereto.

Item #1-4, #1-5, #1-6

RCP 1, 2, 3

Description:

Work under this item consists of locating the existing drainage swales at stations 1+28, 3+60, and 5+22 of the proposed trail and installing the proposed pipes. Under this item all excavation, backfilling, RCP, labor and incidentals to place the pipe should be included. The reinforced concrete pipe must have flared ends at the inlet and outlet. The pipe should be installed such that final inlet and outlet elevations match the existing swale grade. The path should be graded over the pipe to ensure a minimum of two feet of fill above the pipe.

Materials:

Minimum class IV reinforced concrete pipe in accordance with section M.08.01 of the Standard Specification Form 818.

Bedding material shall conform to M.08.03 of the Standard Specification Form 818.

Select backfill shall be free draining material conforming to M.02.07 of the Standard Specification Form 818.

Construction Methods:

The existing swale grades should be located and recorded to ensure the final pipe invert meets the existing flow grades of the swale. Excavation to lay bedding and pipe must be done in a controlled manner. Spoils may be reused as fill above the pipe or along the trail if in the engineer’s opinion, the material is free of organics.

Bedding material shall be installed and compacted in accordance with section 2.12.03 of the Standard Specification Form 818.

Pipe shall be installed per section 6.51.03 of the Standard Specification Form 818.

Method of Measurement:

This work will be paid for on a lump sum basis and will not be measured for payment.

Basis of Payment:

This work will be paid for at the lump sum contract price for “RCP 1, RCP 2, and RCP 3” respectively. That price shall include all excavation, layout, pipe, flared ends, bedding, backfill material, equipment, tools and labor incidental to the installation of the culvert and fill to the bottom of the proposed path.

Item #1-7 Stair Modification

Description:

This item is for the work associated with the filling and grading as necessary to convert the existing stairs to the tide-gate into a concrete ramp. The ramp should have a maximum longitudinal slope of 6% and transverse slopes up to 18%. Grades should be indicated by stake and paid for under the Construction Staking bid item. Fill should be left 13” low to account for 5” concrete sidewalk and 8” process base – both paid for under the Sidewalk item.

Materials:

On-site excavated material may be used as fill at the engineer’s direction if free from organics and approved by the engineer.

Material brought to the site to be used as fill shall meet the requirements of M.02.01 of the Standard Specification Form 818.

Construction Methods:

Fill material should be placed in accordance with section 2.12.03 of the Standard Specification Form 818.

Method of Measurement:

This work will not be measured for payment.

Basis of Payment:

This work will be paid for at the contract lump sum price for ‘Stair Modification’ which price shall include all fill material, layout, compaction and grading, tools, equipment, labor and incidentals.

Item #1-5 Handrail Modification Description:

This item is for the work associated with the modification of the existing guardrail on the tide gate, and the extension of that guardrail down the proposed ramp at the Northern end of the trail.

The modification to the existing tide gate guard rail is intended to bring the rail into compliance with ADA and IBC requirements.

The extension to the guard rail on the ramp should meet all IBC and ADA requirements and should be ten feet in length.

Materials:

Panels for the guardrail modification shall be 4x4 W1.4xW1.4 welded wire mesh. Welded wire mesh must be either epoxy painted black, powder coated, or stainless steel.

Guardrail extension shall be powder coated black steel and meet all applicable ADA and IBC code requirements Construction Methods:

Surface of existing guardrail shall be cleaned to SSPC-SP 3 standard in all locations to receive welds. Panels shall be furnished for engineer’s inspection prior to welding them to the existing guardrail. Guardrail extension posts should be set embed in the concrete sidewalk. The interface between existing guardrail and proposed extension may be made with welds to the horizontal grab bars, or a new end post with a maximum of two inches between existing post and new post.

Method of Measurement:

This work will not be measured for payment.

Basis of Payment:

This work will be paid for at the contract lump sum price for ‘Guardrail Modification’ which price shall include all panel material, new guardrail, weld material, tools, equipment, labor and incidentals.

Item #1-6 Post and Rail Fence

Description:

This item is for the work associated with the post and rail fence between the proposed walking trail and top of embankment on Mill River’s edge.

Materials:

Construction Methods:

Surface of existing guardrail shall be cleaned to SSPC-SP 3 standard in all locations to receive welds. Panels shall be furnished for engineer’s inspection prior to welding them to the existing guardrail. Guardrail extension posts should be set embed in the concrete sidewalk. The interface between existing guardrail and proposed extension may be made with welds to the horizontal grab bars, or a new end post with a maximum of two inches between existing post and new post.

Method of Measurement:

This work will not be measured for payment.

Basis of Payment:

This work will be paid for at the contract lump sum price for ‘Guardrail Modification’ which price shall include all panel material, new guardrail, weld material, tools, equipment, labor and incidentals.

Phone (203) 946-6417 ( Fax (203) 946-8093