(SOW) ZOB CTRB_Concrete Sidewalk10.03.2024 (1).pdf

STATEMENT OF WORK

ZOB Sidewalk Repair, Replacement, and Addition

1.0 Background

The FAA ZOB - Oberlin Facility was built in 1959. As such, there are areas where sidewalk has been in place since construction. Over the years, some of the existing sidewalk has been repaired and (or) replaced, however, there are still areas where existing sidewalk need to be replaced because those areas have degraded due to the extreme Northern weather climate and products used to remove ice and snow and poses a safety hazard. The sidewalks have exceeded their life cycle.

There are also areas where new sidewalk is need because of additions to the facility which altered the employee/pedestrian traffic flow. This project will address these issues and create safe walking surfaces with natural traffic flows. This project also addresses issues with accessibility access.

1.1 Scope of Work and Objectives:

The Contractor shall: Provide all labor, tools, equipment, materials and supervision required to:

Area 1: (1) Provide a solution to flatten and properly drain water southward away from the entrance and to prevent water penetration into the basement.

Approximately 480 square feet. Final surface should be non-slip and color should match existing. (2) Remove and replace approximately 1,846 square feet of concrete, running eastward adjacent to main entrance, and southward to match existing. (3) Remove existing concrete around surface drain at flagpole and install new concrete. (4) Install ADA compliant ramp.

Area 2: (1) Install approximately 448 square feet of new concrete for a 6 feet wide driveway, to include a driveway apron. Remove any existing sidewalk that’s in the way to pour one continuous drive/apron.

Area 3: (1) Install approximately 160 square feet of concrete sidewalk.

Area 4: (1) Remove approximately 456 square feet of existing concrete sidewalk and install approximately 798 square feet of new 4 feet wide concrete. (2) Install ADA compliant ramp

Area 5: (1) Remove and replace approximately 60 linear feet of curb/gutter to match existing. (2) pour 51 linear feet of new curb/gutter to match existing. (3) Install ADA compliant ramp

**NOTE: See map for Areas 1-5.

2.0 Requirements:

The Contractor shall:

a. Protect existing foliage, vegetation, and trees.

b. Protect existing ground drains.

a. Repour all concrete to meet ADA specifications.

b. Repair any existing asphalt that was damaged during the project

c. Contractor shall remove and dispose of all concrete and construction related debris.

d. Shall Return all areas to original condition (Clean all debris and waste from site).

e. All concrete poured shall be a minimum of 4” in depth over 4” of aggregate.

c. Backfill all areas adjacent to concrete to match existing edge of existing sidewalks.

2.2 Special Contractor Requirements:

The following is a list of special requirements the Contractor will need to be aware of:

Pre-Construction Meeting – The Contractor is required to attend the pre-construction meeting.

Site Visit – It is strongly recommended that the Contractor make a site visit prior to providing a bid.

Work Schedule – Normal work hours will be from 7 am to 4 pm, Monday through Friday. All work outside of the normal time frame will be coordinated with the FAA Representative. The Contractor shall give a minimum of 48 hours’ notice prior to commencing with work outside of normal work hours.

2.1 Restrictions and Security Concerns:

The Contractor is: Advised that the FAA Facility grounds are part of the secured facility and all personnel, possessions, equipment, materials, vehicles, etc. are subject to inspections at the discretion of the security personnel while on the premises. All Contractor personnel shall maintain on their person, at all times while on the grounds, current photo identification.

The Contractor shall: Provide the FAA Site Representative with a list of the personnel requiring access to the site. This list shall include the employee’s full name, social security number, and the date of birth. It will be necessary to coordinate all activities with the FAA Site Representative to minimize interference with site operations and to account for all personnel in the event of an emergency.

2.3 Final Inspection:

After completion of all contracted work, a final inspection will be held with the SSC Manager and the FAA Site Representative. The inspection shall be conducted in such a manner as to provide a detailed review of all work performed, to ascertain that all contracted work is completed in accordance with the Scope of Work, disturbed areas restored, and installation areas cleared and left in satisfactory condition.

2.4 Responsibility for Damage:

The FAA seeks to avoid any activity by the Contractor that may lead to damage of government property. The Contractor is therefore advised to take all necessary precautions to avoid potentially damaging activities. The Contractor is advised to place special emphasis on avoiding unnecessary contact including jarring, touching, placing tools on, etc. any FAA equipment. In addition, all devices, electrical plugs, equipment, etc. must be safely maintained as damage could reduce the effectiveness of existing air traffic control activities. Any such damage resulting from neglect or unreasonable actions by the Contractor’s personnel shall be repaired or replaced by the Contractor at no additional cost to the government. If the Contractor fails or refuses to make such repairs or replacements, the Contractor shall be liable for the cost, which may be deducted from the contract price. A comparison of the initial inspection and the final inspection reports and acceptance of each area by the FAA Site Representative shall be the basis for assessment of any damages, if any.

2.7 Reinforced Concrete Sidewalk, Curb, and Curb and Gutter:

This section specifies cast-in-place concrete, including reinforcement, concrete materials, mix design, placement procedures, and finishes. All sidewalks, curbs, and approaches constructed or installed, and any replacements thereof at FAA ZOB - Oberlin Facility shall conform to all requirements of ACI 301-72 (Revised 1981), “Specifications for Structural Concrete for Buildings.”

a. Concrete, transit mixed conforming to ASTM C-94 4000 psi, 28-day strength with 6%-8% entrained air and slump 2 to 4 inches.

b. Wire mesh placement shall be pre-set wire mesh 6”x6” – 6/6 in all pavement forms at mid-height of slab, and overlap joints 6”. The wire mesh shall be set on “chairs” or similar devices prior to pour. Do not “pick up” re-enforcing during or subsequent to pour.

c. Contraction joint for curb and gutter shall consist of hard-pressed fiberboard.

Expansion joint filler, pre-molded, shall conform to ASTM D 1751 or ASTM D 1752, to match existing.

d. Expansion joint shall be formed with ½ inch joint filler strips. Joint filler in expansion joints and within the sidewalk may consist of preformed filler material conforming to ASTM D 1752.

e. Joint sealant, cold-applied shall conform to ASTM C 920 or ASTM D 5893.

f. Concrete finishing shall be performed after straight edging, with a wood or metal float to a smooth and uniform surface free of waves, irregularities, or tool marks.

A scored surface shall be produced with a fiber-bristle broom across the concrete surface (to match existing), followed by edging.

g. Edging and joint finishing shall include all slab edges and those formed joints, and shall be finished with an edger having a radius of approximately 1/8”, or match existing.

h. Curing shall be performed by applying an approved colorless curing compound to the entire exposed surface of the concrete as soon after finishing as the free water has disappeared from the finished surface. This compound shall be applied by pressure spraying at a rate of 150 square feet per gallon, or as recommended by the manufacturer.

i. Backfilling shall be done after curing, and forms have been removed. Debris shall be removed and the area adjoining the concrete shall be backfilled, graded, seeded, and mulch covered in disturbed areas. Areas where aggregate is installed adjacent to sidewalk shall be backfilled to match. Areas where planting beds are adjacent to sidewalk shall be backfilled to match.

j. Close-out shall take place after completion of all contracted work with the SSC Manager and the FAA Site Representative. Exposed surfaces of the finished work will be inspected with the contractor to ascertain that all contracted work is completed in accordance with the Scope of Work, disturbed areas restored, and installation areas cleared and left in satisfactory condition. Any deficiencies in appearance will be identified and areas which exhibit excessive cracking, discoloration, form marks, or tool marks or which are otherwise inconsistent with the overall appearances of the work shall be removed and replaced.

2.8 Warranty

The warranty shall include all labor and material, dated ten years form substantial completion.

1 | P a g e

Sidewalk Replacement/Repair Project

William Fredericks Oval

2 | P a g e

Water and debris ponding at entrance poses a safety hazard. Resurface entrance area with new slip-resistance surface to drain south. (Area 1)

Replace existing 3' wide eastward front sidewalk with new 4' wide sidewalk. (Area 1)

Replace deteriorated concrete at surface drain (Area 1)

Replace deteriorating 4' wide sidewalk at main entrance with new 4' wide sidewalk.

(Area 1)

3 | P a g e

Replace existing sidewalk with new 4' wide sidewalk at smoke shack. (Area 1)

Install new ADA required ramp at road with new 4' wide sidewalk at smoke shack.

(Area 1)

Install new 6' wide driveway extending southward from new garage door at AAS Bldg.

to new east-west sidewalk in Area 2. (Area 2)

Replace existing deteriorating sidewalk and ADA Bump pad at the main entrance. (Area 1)

4 | P a g e

Replace existing deteriorating sidewalk and extend westward to new north-south adjacent sidewalk in Area 4. (Area 3)

Remove existing 3' wide sidewalk and install new 4' wide sidewalk to match existing 4' wide sidewalk. Install new ADA required ramp at road.

(Area 4)

Install new 6' wide driveway extending north to AAS Bldg. from new east-west sidewalk in Area 2. Replace driveway apron at street. (Area 2)

Replace existing deteriorating sidewalk at AAS/ISF entrance runing north-south and extend southward to new east-west adjacent sidewalk. (Area 3)

5 | P a g e

Replace curb and sidewalk and install ADA ramp as required. (Area 5)

Replace existing deteriorated curb. (Area 5)

Replace deteriorated curb and gutter. (Area 5) Replace existing deteriorated curb. (Area 5)

Replace deteriorated curb and gutter. (Area 5)

Replace existing 3’ wide sidewalk to match existing 4’wide sidewalk and install ADA ramp. (Area 4)