S06_Attachment_312316RockRemoval.pdf

FAYETTEVILLE NATIONAL CEMETERY PROJECT NO. 842CM3027

COLUMBARIUM AND IN-GROUND CREMAINS APRIL 20, 2025

BURIAL EXPANSION

BID DOCUMENTS

ROCK REMOVAL

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SECTION 31 23 16

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Rock removal.

2. Quantity measurement and verification.

1.2 UNIT PRICES FOR ADDED OR DEDUCTED WORK

A. The following unit prices shall apply:

1. Unit Price Item #1 – Rock Removed and Rock Excavation -

Unit price shall consist of rock work as specified in unit price description.

2. The price per unit of measurement shall be as specified in unit price description.

B. Verification of sound rock: Demonstrate to the Owners Representative that materials to be classified as rock cannot be removed utilizing a backhoe or excavator equipped with any form of bucket, including a bucket equipped with ripping teeth.

C. Measurement Requirements: Prior to removing rock, excavate pits in earth, down to rock for the purpose of determining top of rock elevations. Take elevations and measurements as required for the purpose of confirming / determining the quantities of rock removal.

Record all measurement data via a certified survey stamped and signed by a locally licensed professional surveyor and submit a copy of the data to the Owners Designated Representative. Backfill excavated pits as directed. Unless otherwise indicated or directed, excavate test pits as follows:

1. For paved areas: 3 pits for each 2,500 square feet.

2. For utility trenches: One pit for each 50 linear feet.

D. The Contractor’s unit price for rock removal is all inclusive, and shall include excavation pits, measurement, verification, and surveying; rock removal, rock handling and processing, rock transport, rock hauling, and rock disposal; overhead, profit, and all other expenses incidental to the Work.

E. The unit price for additional rock removal is over and above the cost of earth excavation. No deduction from the bid sum will be taken for

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31 23 16 - 2 reduced quantities of earth excavation resulting from additional rock removal.

F. Measurement: Rock quantities will be determined by measuring rock in place prior to removal. Measurements shall be taken of the actual rock cut, as required for the Work, or to the specified measurement limits, whichever is smaller. Unless otherwise directed in writing, measurement limits shall be as follows:

1. Cast-In-Place Concrete:

a. Vertical Limit: Bottom of rock cut for cast-in-place concrete bearing on rock shall be 12 inches below the required bottom concrete elevation.

b. Horizontal Limit: Limit measurement between vertical side surfaces at bottom of rock cut to the following:

Actual Depth of

Rock Cut

Distance Beyond Edge of Concrete in Each Direction

Under 3 Feet 12 Inches

3 to 7 Feet 24 Inches

2. Asphalt pavement and Precast Concrete Structures:

a. Vertical Limit: Bottom of rock cut for asphalt pavement bearing on rock shall be 12 inches below the required bot-tom asphalt elevation.

Actual Depth of

Rock Cut

Distance Beyond Edge of

Asphalt in Each Direction

Under 5 Feet 12 Inches

5 to 7 Feet 18 Inches

3. Pipe:

a. Vertical Limit: Bottom of rock cut for pipe in trench shall be 6 inches below the required pipe invert elevation, with depth measured from the mean surface of the rock.

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Actual Depth of Rock Cut Trench Width

Under 10 Feet 24 Inches plus Pipe OD

10 to 15 Feet 36 Inches plus Pipe OD

4. Conduit:

a. Vertical Limit: Bottom of rock cut for conduit in trench shall be as required for the indicated depth of the con-duit.

Actual Depth of Rock Cut Trench Width

Under 3 Feet 24 Inches, except where wider width is required by the multiple horizontal conduits.

3 to 10 Feet 36 Inches, except where wider width is required by the Drawings or directed for multiple horizontal conduits.

1.3 DEFINITIONS

A. Common Excavation: Excavation and disposal of all materials that can be excavated, transported, and unloaded using heavy ripping equipment and wheel tractor-scrapers with pusher tractors or that can be excavated and dumped into place or loaded onto hauling equipment by excavators equipped with attachments (shovel, bucket, backhoe, dragline, or clam shell) appropriate to the material type, character, and nature of the materials.

For the purpose of this classification, the following definitions shall apply:

1. Heaving ripping equipment is defined as a rear-mounted, heavy duty, single-tooth, ripping attachment mounted on a track type tractor having a power rating of at least 250 flywheel horsepower unless otherwise specified.

2. Wheel tractor-scraper is defined as a self-loading (not elevating) and unloading scrapper having a struck bowl capacity of at least 12 cubic yards.

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3. Pusher tractor is defined as a track type tractor having a power rating of at least 250 flywheel horsepower equipped with appropriate attachments.

B. Rock Excavation: Excavation of all hard, compacted, or cemented conglomerate materials that require the use of ripping and excavating equipment larger than defined for common excavation. The excavation and removal of isolated boulders or rock fragments larger than 1 cubic yard encountered in materials otherwise conforming to the definition of common excavation shall be classified as rock excavation. The presence of isolated boulders or rock fragments larger than 1 cubic yard is not in itself sufficient cause to change the classification of the surrounding material.

C. Unclassified Excavation: Excavation and disposal of all materials, of any description, including rock material, encountered during the course of construction, regardless of their nature or the manner in which they are removed.

D. Unauthorized Rock Removal:

1. The removal of rock material below required elevation indicated on the Drawings or beyond lateral dimensions indicated or specified without specific written direction by the Owners Representative.

2. The removal of rock material prior to performing the required measurement verification required to determine quantities.

E. Rock: Rock material in beds, ledges, unstratified masses, conglomerate deposits, and boulders of rock material greater than 1 cu. yd. or more in volume that exceed a standard penetration resistance of 100 blows/2 inches when tested by a geotechnical testing agency, according to ASTM D 1586.

1.4 SUBMITTALS

A. Rock Removal Procedure: Submit a detailed outline of intended rock removal procedure for the Owners Representative’s information. This submittal will not relieve the Contractor of responsibility for the successful performance of method used.

1. No blasting is permitted; use of explosives is prohibited.

B. Rock Excavation Report:

1. Certification of rock quantities excavated.

2. Excavation method.

3. Labor

4. Equipment

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5. Land Surveyor’s name and official registration stamp.

6. Plot plan showing elevation.

C. Measurement data for quantities of rock removal.

1.5 QUALITY ASSURANCE

A. Pre-Rock Removal Conference: Before the rock removal work is scheduled to commence, a conference will be called by the Contracting

Officer/Contracting Officer’s Representative (CO/COR) at the site for the purpose of reviewing the Contract Documents and discussing requirements for the Work. The conference shall be attended by the

Contractor, the Contractor’s rock removal subcontractor, the person supervising the rock removal operations, and the CO/COR.

1.6 SUBSURFACE INVESTIGATIONS

A. The Contractor shall note the potential for rock removal required to achieve the contract document’s finished grade and project scope, including site utilities, new pavements, and columbarium installations.

B. Geotechnical Evaluations were preformed and included in the Project

Specifications in the Appendices.

1.7 FIELD CONDITIONS

A. Cold-Weather Placement: Comply with ACI 301 and ACI 306.1.

B. Hot-Weather Placement: Comply with ACI 301 and ACI 305.1.

PART 2 - PRODUCTS

2.1 EXCAVATION BACKFILL

1. The Contractor shall backfill the excavation resulting from rock removal operations as required to achieve finished grades per

Section 31 20 00, “Earth Moving”, at the Contractor’s expense.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examination of Existing Property and Construction: Prior to starting rock removal work, thoroughly examine the existing property and construction at the site and record, with notes, drawings, and certified survey, existing defects, deterioration, and conditions detrimental to installation of new work. Provide a written summary to the CO/COR.

3.2 ROCK REMOVAL

A. Remove rock as required by the Drawings and as necessary for the installation of the Work. Make sufficient clearance, within the limits specified, for the proper execution of the Work.

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3.3 FIELD QUALITY CONTROL

A. Provide the CO/COR with the recorded top of rock elevations, measurements, and quantities of rock to be removed prior to the performance of any rock removal operations.

B. Allow time for visual inspection of bottom of rock cut required for the

Work and survey of limits of rock removed.

3.4 DISPOSAL OF EXCESS AND UNSUITABLE MATERIALS

A. Transport excess and removed rock materials off of the property.

B. Transport unsuitable removed rock material off of the property.

3.5 ADJUSTING

A. Unauthorized Rock Removal:

1. Horizontal Direction: Backfill and compact unauthorized rock removal in the horizontal direction as specified for authorized excavation of the same classification, unless otherwise directed.

2. Vertical Direction: Immediately report unauthorized rock removal in the vertical direction to the CO/COR. Correct unauthorized rock removal in the vertical direction to the satisfaction of the CO/COR.

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