Attachment_2_-_Specications.pdf

GENERAL INFORMATION AND REQUIREMENTS

GAOA-Guffey Gorge Parking Improvements 11/01

01009-1

SECTION 01009

PART 1: GENERAL

1.1 SUMMARY

A. Description of Work: Furnishing labor, equipment, supplies, and materials, to improve an existing aggregate parking area by constructing a boulder retaining wall, importing aggregate fill and aggregate surfacing, installing bear proof storage and trash containers, constructing picnic areas including adjacent retaining walls, installing steel parking stops, and performing miscellaneous site improvements as stated herein.

B. Location: Work under this Contract is located in Park County, Colorado.

The work location is shown on the drawings.

1.2 REFERENCES

A. Referenced Specifications/Standards with Abbreviations and/or Acronyms:

Wherever the following acronyms are used in these specifications or on the drawings, they are to be construed the same as the respective expressions represented. Copies of the referenced specifications/standards referred to herein may be procured by the Contractor, from the following:

AASHTO American Association of State Highway and Transportation

Officials 444 North Capitol Street, N.W., Suite 249 Washington, DC 20001

AASHTO M 147-65 Materials for Aggregate and Soil

Aggregate Subbase, Base and Surface Courses (R1993)

ACI American Concrete Institute

P.O. Box 19150 Detroit, MI 48219

ACI 305R-91 Hot Weather Concreting ACI 306R-88 Cold Weather Concreting ACI 347R-94 Guide to Formwork for Concrete

ASTM American Society for Testing and Materials 100 Barr Harbor Dr.

West Conshohocken PA 19428-2959

ASTM C 143 REV A-90 Test Methods for Slump of Hydraulic Cement Concrete

ASTM C 260-95 Air-Entraining Admixtures for Concrete ASTM C 309-95 Liquid Membrane-Forming Compounds for

Curing Concrete

01009-2

AWS American Welding Society, Inc.

550 Lejeune Rd. NW Miami, FL 33126

AWS D 1.1-94 Structural Welding Code Steel

1.3 DEFINITIONS

A. Approvals: Approval of the submittals is an indication that the Contractor's submittals have been reviewed and that there are no objections, except as noted. Approval of deviations shall apply only to those deviations or omissions from the requirements of the drawings and specifications brought to the Contracting Officer's attention in writing.

After approval of an item, submit a substitute for approval when the approved item cannot be purchased or delivered in time to avoid delay in completion of the project.

1.4 SUBMITTALS

A. Scope: Submittals include materials compliance for aggregate surfacing and imported fill material, aggregate weight tickets, concrete batch tickets, manufacturers' literature, as-built drawings, samples, and maintenance manuals.

B. Requirements: Refer to specifications for submittals required. Allow at least 5 working days for review. Submittals shall be delivered to electronically in PDF format to Blaine Vecchia, bvecchia@blm.gov.

C. Identification of Submittals: Completely identify each submittal by showing at least the following information:

1. Name and address of submitter, plus name and telephone number of the individual to contact for further information.

2. Name of project as it appears in these specifications.

3. Contract number, drawing number, and specification section number to which the submittal applies.

4. Whether this is an original submittal or resubmittal.

5. Each item shall clearly note the manufacturer's name and address, trade name, product, lot, style, color, catalog designation or model number, and locations of use.

1.5 CERTIFICATES OF CONFORMANCE

A. Requirements: The Contracting Officer may permit use, prior to sampling and testing, of materials when accompanied by Certificates of Conformance.

Materials used on the basis of a Certificate of Conformance may be sampled and tested. Installation of materials on the basis of Certificates of Conformance shall not relieve the Contractor of responsibility for incorporating materials which conform to the requirements of the drawings and specifications. Material not conforming to those requirements will be subject to rejection, whether in place or not.

01009-3

B. Format: The Certificate of Conformance provided by the supplier shall:

1. State that the named product conforms to the Contract requirements.

2. Either be accompanied with a certified copy of the test results, or certify that such test results are on file with the manufacturer and will be furnished to the Contracting Officer upon request.

3. Provide the name and address of the manufacturer, the testing agency, and the date of tests.

4. Set forth the means of identification which will permit field determination of the product delivered as being the product covered by the certification.

1.6 QUALITY ASSURANCE

A. Codes and Standards: The work shall comply with codes and standards applicable to each type of work and as listed in the individual sections of these specifications. This Contract incorporates materials, applications, and tests by reference, with the same force and effect as when they were given in full text.

B. Conflict: Where a conflict occurs between reference documents and project specifications, the project specifications shall govern.

C. Measurements: Where approved manufacturer's diagrams and shop drawings give specific measurements or rough-in dimensions for equipment, these dimensions shall take precedence over dimensions indicated on the drawings.

1.7 DELIVERY, STORAGE, AND HANDLING

A. Delivery: Protect products incorporated into the work from damage while in transit to the site. Products must be delivered in original unopened containers with manufacturer's name, brand designation, and contents legibly indicated.

B. Storage: Provide temporary storage facilities for products if applicable due to delays caused by winter. Storage shall comply with the manufacturer's instructions. The storage area shall permit access for inspection and handling.

C. Handling: Load and unload products protecting them from damage.

1.8 PROJECT/SITE CONDITIONS

A. Access to the Work: As per Federal Acquisitions Regulations Clause 52.236-10. Access to work locations within the sites shall be limited to existing roads only.

B. Environmental Considerations: As per Federal Acquisitions Regulations Clause 52.236-9 and 52.236-10.

1.9 SEQUENCING AND SCHEDULING

A. Construction Period Window: Work shall not start prior to September 6, 2022 and shall be completed no later than M ay 26, 2023.

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B. Work Schedule: The schedule shall be submitted within 5 calendar days after signing the Notice to Proceed and as per Federal Acquisitions Regulations Clause 52.236-15. When requested, submit an updated schedule. At a minimum, the schedule will state the estimated timeframes for the work to be performed.

PART 2: PRODUCTS

(There are no applicable requirements.)

PART 3: EXECUTION

3.1 PROJECT MEETINGS

A. Pre-Work Conference:

1. Will be held prior to the start of work. The Contractor will be notified in advance of meeting time, date and place. The purpose will be to review required work, project drawings and specifications, construction schedules, payroll and payments, and administrative provisions of the Contract.

2. The Contractor, subcontractors and the persons responsible for coordination of the work shall be present at the meeting.

3. Be prepared to summarize and explain procedures planned for the project [and present the submittals requested in the specifications].

B. Progress Meetings:

1. To be held at the project site, or as determined by the Contracting Officer.

2. May be called by either the Contracting Officer or the Contractor.

Request shall state who should attend and include an agenda.

C. Final Inspection:

1. To be held at the project site, or as determined by the Contracting Officer.

2. Notify the Contracting Officer in writing at least 5 working days before the completion date so the Government can schedule final inspection.

3. The superintendent shall be present during this inspection.

3.2 PREPARATION

A. Work Layout: The coordinates used for creating the layouts are site corrected Datum. The construction drawing was created in AutoCAD Civil 3D, version 2020.

The contractor shall be responsible for developing the construction stakeout plan for construction staking/marking for the installation and construction of all items listed in the specifications and drawings. The contractor shall be given an electronic copy (CAD drawing) of the construction drawing for the development of the stakeout plan, or upon request given an electronic “txt” or “csv” file containing the coordinates and elevations of the finished design in place of the electronic construction drawings. Submit an electronic copy and paper printout of the completed stakeout plan for review a minimum of 5 working days prior to starting work.

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B. Work Limits and Control Points: Will be established by the Contracting Officer.

3.3 SALVAGEABLE ITEMS

A. Requirements: Salvageable items consisting of 36 concrete wheel stops, a picnic table, and an 18”x20’ HDPE Culvert shall become the property of the Contractor until the Government takes ownership by hauling the materials from the site. Remove and store items designated as salvage for the Government at the locations approved by the Contracting Officer.

3.4 DISPOSAL OF DEBRIS

A. Requirements: Items or debris not designated as salvage for the Government shall become the property of the Contractor. Disposal of materials in a legal manner and payment of fees required is the Contractor's responsibility.

PART 4: MEASUREMENT AND PAYMENT

4.1 METHOD OF MEASUREMENT

A. Units: The work described in this section will not be measured for payment.

4.2 BASIS OF PAYMENT

A. Payment: No direct payment for the work described under this section will be made. Consideration for this item shall be included in the bid price for other items of the Contract.

END OF SECTION

GAOA-Guffey Gorge Parking Improvements MOBILIZATION 3/22

01505-1

SECTION 01505

MOBILIZATION

1.1 SUMMARY

A. Section Includes: Preparatory work and operations, including those necessary to the movement of personnel, equipment, supplies and incidentals to the project site; and for other work and operations which must be performed, or costs incurred prior to beginning work on the various items on the project site.

(There are no applicable requirements.)

PART 3: EXECUTION

(There are no applicable requirements.)

PART 4: MEASUREMENT AND PAYMENT

4.1 METHOD OF MEASUREMENT:

A. Units: Progress payments will be made as follows:

1. When 5% of the original Contract amount is earned from other bid items, 50% of the amount bid for mobilization or 5% of the original total Contract amount, whichever is lesser, will be paid. Upon completion of work for the project, when all equipment and materials have been removed from the work site and the site has been approved by the Contracting Officer, the remaining Contract amount for mobilization/demobilization may be invoiced.

2. The total sum of all payments shall not exceed the original

Contract amount bid for mobilization, regardless of the fact that the Contractor may have shut down the work on the project or moved equipment away from the project and then back again.

A. Payment: Payment will be made under:

Pay Item Pay Unit

01505(1) Mobilization. . . . . . . . . . . . . . . . . Lump Sum

SECTION 01570

TRAFFIC REGULATION

TRAFFIC REGULATIONS

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01570-1

A. Section Includes: Requirements to provide safe and expeditious movement of traffic through constructions zones.

B. The Contractor will be allowed to restrict all non-construction vehicle traffic from entering the work area as shown on the drawings.

Pedestrian traffic shall be allowed to access the work area and access the trail adjacent to the parking area.

1.2 SUBMITTALS

A. General: Submittals shall be according to Section 01009 - General

Information and Requirements.

B. Traffic Control Plan: Submit one copy for approval. Plan shall include at a minimum the following topics:

1. Specific signage, signals, channelizing and lighting devices, barricades, and flag persons that are detailed in the current MUTCD, and CDOT regulations and that will be used for the project.

2. Traffic Control requirements, if applicable, for working adjacent to county roads within Park County, CO.

3. Include a narrative and/or drawing showing the location of traffic control devices to be used.

2.1 MATERIALS

A. Signs: Shall have reflectorized sheeting and meet the standards of the current Manual on Uniform Traffic Control Devices for Streets and Highways (MUTCD) for colors, sizes, and shapes.

B. Cones: Cones shall be a minimum of 18 inches high and shall be orange colored and highly visible both in daylight and darkness. Reflectorized material shall have a smooth, sealed outer surface, which will display the same approximate color day and night. Cones shall be capable of remaining upright during normal traffic flow and wind conditions.

1. Traffic Control Devises: Either flag persons or traffic control signals shall be in place if the Contractor has to stop traffic in any manner along Park County Road 102 to route equipment or vehicles on or across the road.

3.1 PUBLIC SAFETY

A. Preparation: Provide, erect, and maintain all necessary traffic control

TRAFFIC REGULATIONS

GAOA-Guffey Gorge Parking Improvements 05/22

01570-2 devices as on the approved Traffic Control Plan and as required by the State and local authorities having jurisdiction. Mobilization or construction shall not begin until all traffic control persons or devices as approved are in place. Traffic control devices shall remain in place until completion of project or as approved by the Contracting Officer.

3.2 VEHICLE TRAFFIC CONTROL

A. Application: Maintain flow of public traffic and conduct operations, to offer the least possible obstruction and inconvenience to public traffic.

1. Maintain the condition, operation, and effectiveness of all traffic control devices throughout their period of use. Remove all temporary traffic control devices when no longer needed.

3.3 ROADWAYS, TEMPORARY AND PERMANENT

A. Maintenance of Traffic Control Devices: Signs and other devices shall be kept clean and readable.

A. Units: The work described in this section will not be measured for payment.

A. Payment: No direct payment for the work described under this section will be made. Consideration for this item shall be included in the bid price for other items of the Contract.

SITE DEMOLITION

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02223 - 1

SECTION 02223

A. Section Includes: The removal and salvage of a Steel Picnic Table, 18”x20’ HDPE Culvert, 36-Concrete Curb Stops, approximately 40 each 3’ average size boulders and 3 each 5’ average size boulders. Work also includes the removal and disposal of 10 existing Ponderosa trees, and backfilling cavities left after removal is complete.

(No products are required in this section.)

3.1 PREPARATION

A. Materials designated for salvage shall be placed onsite at a location(s) designated by the Contracting Officer until removed from the site by the Government. The Contractor shall supply equipment and labor to load the salvaged items onto a Government trailer. The Government shall be responsible for securing the items once loaded.

3.2 DEMOLITION

A. Steel Picnic Table: Remove and salvage of one steel tubular framed picnic table with plastic coated expanded metal top and benches. Remove and dispose of concrete anchor chain and footings.

02223 - 2

Steel Table, Remove Trees, Typical 3’ Boulders

B. HDPE Culvert: Remove and salvage one 18” diameter x 20’ HDPE corrugated culvert, including flared end sections.

C. Concrete Curb Stops: Remove and salvage 36 each concrete curb stops including anchor pins. Concrete curb stops are approximate 6” x 6” x 6’ length with 2 each #4 rebar anchor pins for each curb stop.

D. Boulders: Remove and salvage approximately 40 each 3’ average size boulders and 3 each 4’-5’ average size boulders. See the drawings for locations of the boulders. Do not remove the existing boulders located along the shoulder of Park County Road 102. Boulders shall be re-used as individual boulders or within the retaining wall(s) as stated in Section 010990.

E. Tree Removal: Remove and dispose of approximately 10 each Ponderosa trees by felling, trimming and cutting trees. Trees range in trunk diameter between approximately 10” and 24”. Remove trees, stumps, roots, limbs, brush, and other vegetation in areas to be graded or fall within the footprint of the proposed work. Limbs and branches on trees not designated

02223 - 3 for removal but adjacent to or overhanging into the work area and would interfere with the proposed work shall be removed by cutting the limbs near the main tree trunk. Remove limbs as directed by the Contracting Officer.

Removing limbs from adjacent trees with the use of heavy equipment shall not be allowed. Burning of trees and slash shall not be permitted.

a. Landscape Preservation: Protect trees and vegetation not designated for removal but adjacent to the work limits from injury.

3.3 SALVAGE

A. Placement After Removal: Store items removed as salvage at a location onsite as determined by the Contracting Officer. Place items in a manner that will not cause damage and will allow access for future loading and removal from the worksite by the Government.

3.4 DISPOSAL OF DEBRIS

A. Requirements: Items or debris not designated as salvage for the Government shall become the property of the Contractor. Remove such materials from the site and dispose of in a legal manner.

3.5 BACKFILLING

A. General: Fill cavities caused by demolition and removal of items. Fill disturbed areas where concrete flatwork or aggregate has been removed, and that fall outside of the proposed work areas, with topsoil material collected from the proposed construction. See Section 02315.

B. Backfill Placement: Place backfill according to Specification Section

02315.

A. Units: Demolition will be measured and paid for on a lump sum basis.

A. Payment: Prices and payment will be full compensation for the work described in this section. Payment will be made under:

02223(1) Site Demolition . . . . . . . . . . . . . . . . Lump Sum

EXCAVATION AND FILL

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02315 - 1

SECTION 02315

A. Section Includes: Excavating, importing fill material, placement of materials, grading, and other related work to improve an existing parking area.

B. General: Rock is anticipated to be encountered while performing construction.

C. See Drawing “Proposed Site Plan” for quantities of estimated volumes of cut and fill material.

1.2 DEFINITIONS

A. Unclassified Excavation: Shall consist of the material excavation and placement regardless of its nature.

B. Rock Excavation: Removal of material shall be considered rock excavation when it consists of igneous, metamorphic, and sedimentary rock which cannot be excavated with the use of a hydraulic excavator having a minimum operating weight of 65,000 lbs., with minimum net horsepower of 240 and hydraulic hammer with a minimum working weight of 4500 lbs. and an impact energy of 7500 ft-lbs.

C. Common Excavation: Removal of materials which can be excavated with the use of a hydraulic excavator having a minimum operating weight of 65,000 lbs., with minimum net horsepower of 240 and hydraulic hammer with a minimum working weight of 4500 lbs. and an impact energy of 7500 ft-lbs. or less shall be considered common excavation.

D. Fill Material: Shall be mineral soil free from peat, frozen material, brush, trees, roots over 2 inches in diameter and rocks over 6 inches in greatest diameter obtained from site during excavation.

A. Fill Material: Shall be a combination of material collected from the common excavation and imported fill material as described in Section 02730.

Material from excavation shall be used unless it contains ice or frozen earth, debris, high moisture content, or is specified in other sections to be replaced.

B. Imported Fill Material: Shall be approved by the Contracting Officer prior to use. Imported fill material used in the construction of the parking area shall meet the requirements of the Fill Material as stated above or meet

02315 - 2 the requirements for CDOT Class 5 aggregate and/or Class 6 aggregate as stated in Section 02730.

A. Clearing and Grubbing: Per Section 02223 – Site Demolition.

3.2 INSTALLATION

A. Excavation: Excavate where shown on the drawings, unless staked otherwise.

Excavate on a straight grade between the control points shown on the drawings unless staked otherwise.

B. Subgrade Compaction: Compact subgrade prior to placement of material.

Compact as specified in 3.3 A Compaction below, before placement of fill materials.

C. Fill Material/Imported Material: Shall be spread over the full width of the cross section of the embankment to a maximum loose thickness of 8 inches and shall be compacted as specified in paragraphs 3.3 A. Compaction, as shown below, before the next layer is spread. The in-place materials shall be free of lenses, pockets, streaks, or layers of materials differing substantially in texture or gradation from the surrounding materials. See drawing for locations of required material.

D. Frozen Material: Shall not be placed, nor be placed upon a frozen surface.

3.3 FIELD QUALITY CONTROL

A. Compaction: Immediately following final spreading and smoothing, each layer shall be compacted full width. Compaction shall be accomplished by means of a vibratory roller compactor, minimum 48-inch drum width, and minimum 10,000 centrifugal force or approved alternative compaction method.

A minimum of three passes shall be made over the entire width of the area, and until the material visible stops compacting. Add or remove water when necessary to obtain optimum compaction. Compact materials adjacent to the boulder retaining wall as per Section 02322, 3.2, A.

A. Units: The work described in this section will be measured and paid for on a lump sum basis for the earthwork required for the construction of the parking area and picnic areas. Payment includes existing and imported fill materials placed, compacted, and approved. Volumes are calculated using the “Grading Volume Tools” in AutoCAD Civil 3d, Version 2020 and were measured from the existing ground surface to the finished subgrade surface, prior to placement of aggregate.

02315 - 3

02315(1) Earthwork . . . . . . . . . . . . . . . . . . . Lump Sum

EXCAVATION AND FILL FOR STRUCTURES

02322 - 1

SECTION 02322

A. Section Includes: Excavating, backfilling, and compacting for structures.

1.2 DEFINITIONS

A. As per Section 02315.

1.3 QUALITY ASSURANCE

A. Failure Criteria: Not limited to the following:

1. Settlement of backfill which would allow moisture to pond against the foundation or within a horizontal distance from the foundation equal to its design depth.

A. General: Material excavated shall be unclassified. Backfill material shall be approved in writing before use. Material from excavations shall be used unless it contains ice or frozen earth, debris, earth with high moisture content, or is specified in other sections to be replaced.

Materials removed in clearing and grubbing shall not be used for backfill.

B. Bedding

1. Concrete Slabs: Compacted Class 6 Aggregate as per Section 02730.

C. Fill Material:

1. Concrete Slabs: Fill materials as per Section 02315, or aggregate surfacing material as per Section 02730, if applicable.

2. Picnic Pads: Fill materials as per Section 02315.

D. Geogrid: Integrally formed biaxial polypropylene with 1” Aperture dimensions and an ultimate tensile strength of 850 lbs/ft according to ASTM D4759-02. BX1100 as manufactured by Tensar International Corporation, www.tensarcorp.com, or approved equal.

E. Geotextile Fabric: 6-ounce non-woven geo-textile fabric, 160 lbs. grab tensile strength, 65 lbs. trapezoid tear strength.

02322 - 2

3.1 INSTALLATION

A. Bedding

1. Concrete Slabs: Place crushed aggregate to a minimum depth of 6” throughout the full area where the concrete is to be placed. Compact with the use of a mechanical vibratory place compactor with a minimum centrifugal force of 2250 pounds or other approved compaction equipment. Compact a minimum of three passes over the entire area of the lift, and/or until the material visibly stops compacting. Add or remove water as needed to achieve optimum compaction

B. Excavation:

1. General: Perform excavation to the lines, grades, and elevations indicated to allow for safety, placing and removal of forms and inspection and as instructed by the product manufacturer if applicable.

Provide proper depth with allowance made for gravel fill and concrete slabs. When frost action occurs, remove frozen soil, and replace with approved soil, compacted according to the requirements for bedding.

C. Fill Material:

1. Concrete Slabs: Place fill materials as per Section 02315 adjacent and up to the finished grade of the concrete slabs after approval of the concrete. Place aggregate surfacing material against slabs if applicable.

2. Picnic Pads: Place fill material within the retaining wall(s) and to the slopes and dimensions as shown on the drawing “Details”. Place and compact fill material as per Section 02315.

D. Geogrid: Install geogrid as shown on drawing “Boulder Retaining Wall

Details”. Place geogrid at 36-inches intervals vertically, placing the grid between upper and lower courses of the boulder retaining wall and extending approximately 8’-10’ into the fill material within the parking area. After completion of the boulder retaining wall, cut away all visible geogrid from the outside of the wall. Compact fill material under the geogrid prior to placement of geogrid.

E. Geotextile Fabric: Install geotextile fabric as shown on drawing “Boulder

Retaining Wall Details”. Install fabric adjacent to the interior of the retaining wall and place loosely against interior of boulders to allow for fill material to press fabric directly against the boulders without stretching fabric when compacted. Place fabric under and above geotextile as shown and extend to the finished grade of the aggregate surfacing. After completion of the boulder retaining wall and placement of the aggregate surfacing material, cut away all visible geotextile fabric from the inside of the wall at the finished grade of the aggregate surfacing.

02322 - 3

3.2 COMPACTION

A. General: Compact as per Section 02315, 3.3 A. and with the use of a mechanical rammer compacter (Jumping Jack) or approved compaction equipment when risk of movement or damage to the retaining wall is possible by performing compaction with the larger wheeled compaction equipment.

Compact a minimum of three passes over the entire area of the lift, and/or until the material visibly stops compacting. Add or remove water as needed to achieve optimum compaction.

for other items of the Contract.

AGGREGATE SURFACING

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SECTION 02730

A. Section Includes: This work shall consist of placing and compacting contractor furnished aggregate surfacing material on a prepared parking area and fill material within picnic pads.

PART 2: MATERIALS

2.1 GENERAL REQUIREMENTS

A. Aggregate Surfacing: Aggregate shall consist of hard, durable particles or fragments of stone or gravel, crushed or blasted and screened to the size and of the quality requirements as listed in Table 2.1.

TABLE 2-1

Grading Requirements for Surface Aggregates

Designation

Percentage by Weight Passing Square Mesh Sieves (AASHTO T 27)

Grading A (1 inch max.)

Grading B

1 inch 100 3/4 inch 95-100 No. 4 40-80 No. 8 35-70 No. 200 8-15 Plasticity Index

7-14

B. Imported Fill Material: Shall be aggregate consisting of hard, durable articles or fragments of stone or gravel, crushed or blasted and screened to the size and of the quality requirements for crushed aggregate materials normally used locally in the construction and maintenance of highways by Federal or State agencies and shall be according to AASHTO M 147. The aggregates comply with Colorado Department of Transportation (CDOT) Class 5 or Class 6. Aggregate surfacing material as listed above shall not be used as imported fill material.

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02730 - 2

C. Aggregate/Imported Fill Material: A materials compliance submittal verifying the aggregate meets specifications shall be supplied prior to placing any material. Aggregate shall be supplied from a commercially operated sand and gravel supplier. Mixing of additional material(s) by the contractor to bring out of specified material into compliance shall not be allowed. Weighing of material shall be performed by an employee of the sand and gravel supply company.

Weight tickets shall include the company supplier name, ticket number, project name, gross weight, tare weight, net weight, and time and date at time(s) of weighing for each truck load of material. Tare weight(s) of trucks shall be required on every load of aggregate supplied.

3.1 CONSTRUCTION REQUIREMENTS

A. Aggregate Surfacing: Prior to placing aggregate, the subgrade for the parking area shall be bladed and shaped to reasonably close conformity with the line, grade, and cross sections for subgrade as shown on the drawings or established by the Contracting Officer.

1. Placing: The material shall be placed on the prepared surface in a single layer and spread and compacted finished depth.

2. Depth: Aggregate Surfacing finished depth shall be 6”, plus or minus 1/2”.

B. Imported Fill Material: As per Section 02315.

C. Compacting: As per Section 02315 3.3 A.

4.1 METHODS OF MEASUREMENT

A. Method: The quantity to be paid for will be the number of tons of aggregate surfacing material placed within the specified work area, compacted, and accepted in the completed course. Costs associated with imported fill material shall be included in the Pay Item “Earthworks” in Section 02315. Weighing of all material shall be at Contractor's expense. A weight receipt for each load of aggregate surfacing material shall be submitted by the Contractor.

A. General: Prices and payment will be full compensation for the work

PAYMENT WILL BE MADE UNDER:

02730(1) Aggregate Surfacing . . . . . . . . . . . . TON

MINOR CONCRETE

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03306 - 1

SECTION 03306

A. Section Includes: Furnishing and placing cast-in-place concrete, including formwork.

Information and Requirements.

1.3 QUALITY ASSURANCE

A. General: Forming, placing, and finishing concrete slabs for installation of bear proof containers.

B. Causes for Rejection: Concrete may be rejected for, but not limited to, the following reasons:

1. Freezing within the first 3 days of placement

2. Excessive or inadequate slump

3. Segregation of aggregate or over-vibration resulting in excessive water in the surface of the concrete

4. Honeycomb over 25% of the surface

5. Voids larger than 2 inches across

7. Misalignment of concrete

8. Substandard aggregate in the mix

9. Failure to apply cure/sealer within 24 hour after completion of pour.

A. General: Concrete shall be ready mix as per 2.1.

B. Ready Mix Concrete: Ready-mixed concrete shall be according to ASTM C 94 and be designed for a 28-day compressive strength of 4000 psi, and a maximum slump of 4 inches as determined by ASTM C 143.

C. Color-Flatwork Concrete: Shall be “Spanish Gold-5084” as manufactured by

Davis Colors, 3700 Olympic Blvd. Los Angeles, CA 90023, 800-356-4848, www.daviscolors.com, or approved equal.

D. Concrete Curing Compound: Clear all resin, dissipating water based curing compound, meeting ASTM C-309 requirements. Dayton Superior J11W or approved equal.

03306 - 2

E. Fiber: 100% virgin polypropylene, fibrillated fibers specifically manufactured for use as concrete secondary reinforcement, installed at 1.5 pounds per cubic yard of concrete.

F. Water: Potable water shall be used for mixing concrete.

G. Air-Entraining Admixture: ASTM C260. The amount of air shall be 4 to 6 percent when maximum aggregate size is 3/4-inch, and 4.5 to 7.5 percent when maximum aggregate size is 3/8-inch. A variations of plus or minus 1 percent is allowable.

A. Subbase Preparation: Subbase to be in contact with concrete shall be undisturbed or compacted according to Section 02322 - Excavation and Fill for Structures.

B. Form Construction: ACI 347R. Construct forms to the sizes, shapes, lines, and dimensions shown on the drawings. The Contractor shall provide construction aids and imbedded items such as shown on the drawings.

Fabricate forms for easy removal without hammering or prying against the concrete surfaces. Form oil may be applied to facilitate removal of forms.

Forms and subbase shall be wet before placement of concrete.

C. Form Inspection: Notify the Contracting Officer 48 hours in advance of concrete placement to allow for inspection of forming and placement of items to be imbedded in the concrete. Excess water shall be removed from the forms before concrete placement.

3.2 CONCRETE PLACEMENT

A. Placement and Consolidation: Concrete shall be deposited as nearly as practical to its final position to avoid flow causing segregation of the aggregate. Concrete shall not be dropped more than 5 feet vertically without the use of a tremie or similar device.

B. Concrete Placement under Adverse Conditions: During hot weather, refer to ACI 305R. During cold weather, refer to ACI 306R. Materials required for protection shall be on the jobsite before concrete work is started.

Do not place concrete on a frozen subgrade or against surfaces having deposits of frost, snow, or ice.

3.3 CONCRETE FINISHING

A. Concrete Surface Finishes: Concrete slabs shall be given broom finish.

Brooms shall have a minimum width of 18 inches and shall be applied perpendicular to the centerline. Edges shall be formed with a metal tool to leave a smooth border on the concrete.

B. Form Removal: Formwork not supporting concrete may be removed after curing at not less than 50 degrees F for 24 hours after placing the concrete, and

03306 - 3 when curing and protection procedures are followed as specified. The concrete should be sufficiently hard so as not to be damaged by form removal.

3.4 CONCRETE CURING

A. Concrete Curing Compound: Spray on the concrete curing compound as per manufacturing instructions.

3.5 PROTECTION

A. Requirements: During the curing period, protect concrete from load stresses, shock loads, or vibration. Do not allow vehicles or equipment onto concrete for a minimum of 7 days after completion of the pour.

for other items of the Contract

STRUCTURAL STEEL

GAOA-Guffey Gorge Parking Improvements 6/22

05120 - 1

SECTION 05120

STRUCTURAL STEEL

A. Section Includes: Providing and constructing structural steel for use in steel parking stops.

Information and Requirements.

A. Steel: 6-inch diameter black steel pipe, minimum 1/4” wall thickness and at the length as shown on the drawings.

2.2 FABRICATION

A. Welding: AWS D 1.1 E70XX electrodes are required. Grind smooth all welds.

3.1 ERECTION

A. Installation: Install as shown on the drawings and as per Section 10990.

A. Units: The work described in this section will not be measured for payment.

A. Payment: No direct payment for the work described under this section will be made. Consideration for this item shall be included in the bid price for other items of the Contract.

MISCELLANEOUS SPECIALITIES

GAOA-Guffey Gorge Parking Improvements 3/2022

10990-1

SECTION 10990

A. Section Includes: Furnishing labor and materials for the installation or construction of boulder retaining walls, timber steps, individual boulders installations, steel parking stops, precast concrete tables, bear resistant trash receptacle, bear resistant storage locker and miscellaneous sitework as stated herein.

B. General-Alternate Materials: Any/all items requested by the Contractor to be supplied in place of the specified item must have the same salient characteristics, design criteria, and dimensions of the applicable specified item.

A. Boulder Retaining Wall: Boulders used within the retaining walls shall range in size, but the majority of boulders shall have an average size of 3’ and 4’, plus or minus 12”, as shown on the drawings. Boulders shall be reddish brown colored granite. All boulders, regardless of size, shall be acquired from the same quarry to keep a uniform color throughout the wall. Rocks used to fill gaps in between boulders within the wall shall also be acquired from the same quarry as the boulders.

Existing boulders as described in Section 02223 may be used within the retaining walls.

B. Individual Boulders: Shall be reddish brown colored granite and shall have average minimum dimension of 36”. Boulders shall be acquired from the same quarry as the boulders used in the retaining wall. Existing boulders as described in Section 02223 may be used as individual boulders.

C. Timber Steps: 6”x6” Square Ground Contact Treated Timber Frame, #4x24” Rebar Anchor Pins, with Class 6 Aggregate fill material.

D. Steel Parking Stops: According to Section 05120 and as shown on the drawings.

E. Precast Concrete Tables: Tables shall be the ADA compliant Model 100S, as manufactured by Outdoor Creations, Inc. P.O. Box 50 Round Mountain, CA 96084, (530) 337-6774. Tables and benches shall be one continuous pour. Table shall have the “BLM” emblem formed into the pour and have a smooth finish texture. Color of tables shall be “Saltillo”.

F. Bear Resistant Trash Receptacle: Brown in color and shall meet ADA guidelines for forward and side reach. Receptacle shall have two 16-

10990-2 inch square top hatches and two 29” tall front doors with an open total width 44”, and shall include 2, 36-gallon rigid liners inside.

Receptacle shall be made of welded 12 ga. and 14 ga. formed steel, reinforced with 1” x 18 ga. square tubing supports, and shall be anchored as instructed by the manufacturer. Trach receptacle shall include decals stating “Trash Only” on both hatch lids. Receptacle shall be certified by the Interagency Grizzly Bear Committee, Pilot Rock Model BPRT2-72 as manufactured by RJ Thomas Mfg. Co. Inc., www.pilotrock.com or approved equal.

G. Bear Resistant Storage Locker: Shall meet ADA accessibility guideline.

Shall have 25 cubic feet of interior storage compacity, made of 12 ga.

steel plate welded to 12 ga. steel channel framework. Locker shall have 2 doors that open outward from center, and doors shall be made of 12

ga. steel with stainless steel continuous steel hinges. Locker shall be certified by the Interagency Grizzly Bear Committee, Pilot Rock Model BPFL-25 as manufactured by RJ Thomas Mfg. Co. Inc., www.pilotrock.com or approved equal.

3.1 INSTALLATION

A. Boulder Retaining Wall: Construct the retaining walls at the locations and wall dimensions as shown on the drawings and as described in the drawings. Construct walls to best retain earthen materials by filling all voids with smaller rocks of the same type and color. Construct walls approximately level or at a uniform grade with the parking area across the top of the walls as shown on the drawings. Install geotextile fabric and geogrid material within the wall construction as per Section 02322 and as shown on the drawings.

B. Individual Boulders: Install boulders at the approximate locations as shown on the drawings and/or at locations as instructed by the COR.

Orientate boulders longest direction parallel to the road or parking area when applicable. Install in a manner that will produce a firmly set boulder, as shown on the drawings, and as directed by the Contracting Officer.

C. Timber Steps: Construct the steps at the locations shown and according to the drawings. Notch/cut timbers square and straight. Construct steps level and place tightly against the adjacent boulder(s)if applicable. Grade earthen materials away from steps at a minimum 2:1 slope or as directed by the Contracting Officer and blend into adjacent slopes. Apply similar preservative wood treatment as used for the timbers to all cut or untreated portions of the timbers.

D. Steel Parking Stops: Construct as shown the drawings. Install at the locations as shown on the drawings. Parking stops shall be set in straight lines. Distances between items shall be symmetrical.

Finished elevations for parking stops shall be uniform throughout the parking area.

10990-3

E. Precast Concrete Tables: Construct boulder retaining walls and place fill material for picnic table pads as shown on the drawings. Install tables level on the approved aggregate pads as shown on the drawing.

Set tables using equipment and strapping as recommended by the table manufacturer.

F. Bear Resistant Trash Receptacle: Install Trash Receptacle on approved concrete pad as shown on the drawings. Install and anchor as recommended by the manufacturer.

G. Bear Resistant Storage Locker: Install Storage Locker on approved concrete pad as shown on the drawings. Install and anchor as recommended by the manufacturer.

H. Cleaning Existing Culvert: Remove existing soil and debris from the culvert located at the entrance to the parking area. Clean ditch on each side to achieve positive drainage through and away from the culvert.

I. Removal of Existing Boulders: Remove and stockpile boulders as stated in Section 02223 for re-installation as individual boulders or within the proposed retaining walls. The 3 boulders with average size of 4’-5’ will require equipment accessing the Park County Road 102. Supply material or items to prevent heavy equipment from damaging the asphalt road and use flaggers as stated in Section 01570 while routing equipment on or across the road.

A. Units: The work described will be measured and paid for by the length of the retaining walls adjacent to the parking area and surrounding the existing toilet building, each individual boulder, each steel parking stop, each table installed including costs associated with the boulder retaining wall surrounding the table pads and aggregate fill material included within the pads. The installation of the timber steps shall be paid on a lump sum basis for all items installed and accepted. The installation of the bear proof trash receptacle and bear proof storage locker, including associated concrete flatwork, shall be paid on a lump sum basis for all items installed and accepted. Miscellaneous site including cleaning of the existing culvert and work associated with the existing boulders shall not be measured for payment.

4.2 BASIS OF PAYMENT:

described in this section. Consideration for items of work not listed shall be included in the bid price of other items. Payment will be

10990-4 made under:

10990(1) Boulder Retaining Wall. . . . . . . . . . . . . LF

10990(2) Individual Boulders . . . . . . . . . . . . . . EA

10990(3) Timber Steps. . . . . . . . . . . . . . . . . . LS

10990(4) Steel Parking Stops . . . . . . . . . . . . . . EA

10990(5) Picnic Tables and Pads . . . . . . . . . . . . EA

10990(6) Bear Proof Containers. . . . . . . . . . . . . LS