READ AND **REMOVE THIS PAGE** BEFORE PLACING

THE SPECIFICATION SECTION IN THE CONTRACT

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O U T L I N E G U I D E

[DIVISION 2 : SITEWORK ]{.underline}

SECTION 02730 - AGGREGATE SURFACING

USE: Furnishing and placing, and compacting a crushed gravel or crushed
stone on a prepared roadbed.

**NOTES TO SPECIFIER:**

** **A. Options within paragraphs are identified by enclosure in
brackets; blank spaces enclosed by brackets \[[ ]{.underline}\] provide
for information to be inserted, as appropriate to individual projects.

B. **TO AVOID CONFLICTING REQUIREMENTS AND COSTLY MISTAKES,** the
specifier must edit (delete, substitute or add to the text). The
remaining paragraphs must be renumbered.

C. DELETE FOR FINAL COPY: Notes to the Specifier, located between lines
of asterisks; all \[brackets\], [underlining]{.underline}, **boldface,
**and *italics* within the paragraphs; and this page. (Open Reveal Codes
\[alt F3\] to do this accurately).

D. [To Edit "(Footer B)":]{.underline} (Corel 8). **ENTIRE FOOTER SHOULD
BE BOLDED. **Click in the footer and delete the "Project Name (ftr B)"
text and replace it with the **Name Of The Project (upper/lower case).**
Replace date with current MM/YY (WITHOUT BRACKETS).

E. The Guide Specifications are intended to be continuously reviewed and
revised. User's technical comments are appreciated. Also, other related
or similar specifications that are written "from scratch" that could
benefit others, or other questions can be sent to NSTC A/E Group, ST-110
or call (303) 987-6851.

F. DESIGN NOTES:

1\. **DRAWING DATA REQUIRED:**

**REVISIONS OF THIS SECTION:**

CSI format, editorial changes 12/00

Metric: Not Applicable

Technical Update:

**SECTION 02730**

**AGGREGATE SURFACING**

**[PART 1: GENERAL]{.underline}**

**1.1 SUMMARY**

**A. Section Includes: This work shall consist of furnishing, placing
and compacting a crushed gravel or crushed stone courses on a prepared
roadbed in accordance with these specifications and in reasonably close
conformity with the lines, grades, thickness, and typical cross section
shown on the plans or established by the Contracting Officer.**

B Related Sections:

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LIST ITEMS OF WORK THAT MIGHT LOGICALLY BE FURNISHED AND INSTALLED UNDER
THIS SECTION, BUT INSTEAD ARE SPECIFIED IN ANOTHER SECTION. THIS ARTICLE
IS RARELY REQUIRED.

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[PART 2: MATERIALS]{.underline}

2.1 GENERAL REQUIREMENTS

A. Crushed Aggregate: Aggregate shall consist of hard, durable particles
or fragments of stone or gravel crushed 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.

2.2 SPECIFIC REQUIREMENTS

A. Surface and Base Aggregates: The surface and base aggregates shall
have a maximum size of 3/4‑inch and 1 1/4‑inch respectively. Plasticity
index for base aggregates shall be less than 6 and for surface
aggregates shall not be less than 4 or greater than 9. Surface and base
aggregates shall be uniformly graded from course to fine and shall be
free of vegetable matter and clay balls.

B. Quality Control: The Contracting Officer may conduct quality control
reviews to determine the reliability of the certifications. If the
reviews indicate that the certifications are not reliable, acceptance by
certification will be discontinued. Materials furnished will be accepted
or rejected according to SF‑23A, Par. 10 and subsequent materials
furnished will be sampled, tested and accepted prior to incorporation
into the work. All costs to the Government for sampling and testing may
be charged against the Contractor and may be deducted from the payment
for the work.

[PART 3: EXECUTION]{.underline}

3.1 CONSTRUCTION REQUIREMENTS

A. Preparation of Roadbed Including Parking Areas and Yards: All slide
material including culvert inlet and outlet debris, shall be removed and
the existing roadbed, including parking areas shall be scarified,
bladed, and shaped to reasonably close conformity with the line, grade,
and cross sections shown on the plans or established by the Contracting
Officer. Any high places in the road‑bed shall be cut to grade and the
resulting material hauled and deposited on low areas on fill slopes as
directed by the Contracting Officer. Should there remain any depressions
or narrow embankments, sufficient approved material shall be obtained
and placed to bring the width and/or surface of the roadway in
reasonably close conformity with the lines, grades and cross sections
shown on the plans or established by the Contracting Officer. The
road‑bed shall then be rebladed and reshaped. At intersections, the
roadbeds of side roads shall be treated similarly, as governed by the
grading performed, to provide for proper joining of the proposed and
existing riding surfaces. The roadbed shall be compacted as provided in
subsection 3‑4 and all work that may be necessary to produce a completed
and acceptable foundation shall be performed and the roadbed shall be in
this specified condition at the time of placement of any base course,
surface source, or pavement.

B. Placing: The material shall be placed on the prepared roadbed in
layers of the thickness shown on the plans. When more than one layer is
required, each layer shall be shaped and compacted before the succeeding
layer is placed.

1\. Placing shall be from vehicles equipped to distribute the material
in a uniform layer or windrow. The layer or windrow shall be such size
that when spread and compacted, the layer shall have the required
thickness.

2\. When hauling is done over previously placed material, hauling
equipment shall be routed as uniformly as possible over the entire width
of previously constructed layers.

C. Mixing and Spreading: Each course placed shall be mixed to its full
depth by means of power graders, traveling mixers or other approved
mixing equipment. During the mixing, water shall be added in the amount
necessary to provide the optimum moisture content for compaction. When
mixed, the material shall be spread smoothly to a uniform thickness, or
in the case of the top course, to the cross section shown on the plans.
Spreading shall be completed within 24 hours after mixing.

D. Compacting: Immediately following final spreading and smoothing, each
layer shall be compacted full width by approved means of compacting
equipment. Rolling shall progress gradually from the side to the center,
parallel with the centerline of the road or parking area, and shall
continue until all the surface has been rolled. Any irregularities or
depressions that develop shall be corrected by loosening the material at
these places and adding or removing material until the surface is smooth
and uniform. Along curbs, headers, and walls, and at all places not
accessible to the roller, the base material shall be compacted
thoroughly with approved tampers or compactors.

1\. Compaction of each layer shall continue until a density of not less
than 95 percent of the maximum density determined according to AASHTO T
180, Method D, or other approved method, has been achieved.

2\. In‑place field density determinations will be made according to
AASHTO T 191, T 205, or other approved method. The use of AASHTO T 224
to correct for oversize particles may be required.

3\. The Contracting Officer will make measurements of test holes at
random during progress of the work to determine the depth of uncompacted
layers required to produce the designated depth of material after
compacting to the specified density.

4\. Cutting of the test holes and refilling with materials properly
compacted shall be done by the Contractor under the supervision of the
Contracting Officer.

E. Thickness Requirements: The thickness of the completed course shall
not vary more than 1/2‑inch from the thickness shown on the plans.

F. Surface Requirements: When directed by the Contracting Officer, the
surface shall be tested with a 10‑foot straight‑edge furnished and
operated by the Contractor. Any areas where the surface variation
exceeds 1/2‑inch in 10 feet shall be reworked until the variation falls
within this limit.

[PART 4: MEASUREMENT AND PAYMENT]{.underline}

4.1 METHODS OF MEASUREMENT

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WHEN A \"LUMP SUM\" CONTRACT IS USED, DELETE THE TITLE PART 4:
MEASUREMENT AND PAYMENT, AND BOTH ARTICLES FROM THIS SECTION.
MEASUREMENT AND PAYMENT WILL BE ADDRESSED IN PART 4 OF \[SECTION 01009\]
\[OR\] \[SECTION 01010\].

WHEN NOT A \"LUMP SUM\" CONTRACT, SELECT APPLICABLE PHRASES; USE THE
\"NO MEASUREMENT\" PHRASE WHEN NONE OF THE PAY ITEMS IN THIS SECTION ARE
INCLUDED IN THE BID SCHEDULE.

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A. Method: The quantity to be paid for will be the number of cubic yards
measured in the hauling vehicle at the point of delivery, or tons of
material placed, compacted and accepted in the completed course.
Weighing of material shall be at Contractor\'s expense. A weight receipt
for each load of material shall be furnished by the Contractor. BLM Form
#DSC 9100‑3 ‑ Materials Receipt may be used for this purpose.

4.2 BASIS OF PAYMENT

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WHEN NOT A \"LUMP SUM\" CONTRACT, SELECT APPLICABLE PHRASES; USE THE
\"NO DIRECT PAYMENT\" PHRASE WHEN NONE OF THE PAY ITEMS IN THIS SECTION
ARE INCLUDED IN THE BID SCHEDULE.

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A. General: The accepted quantities, determined as provided above, will
be paid for at the contract unit price per unit of measurement for the
pay items listed below that are shown in the bid schedule, which price
and payment will be full compensation for furnishing and placing all
materials, including all labor, equipment, tools, and incidentals
necessary to complete the work prescribed in this section. Compaction
water will not be paid for separately but will be considered as a
subsidiary obligation of the Contractor incidental to work specified.

PAYMENT WILL BE MADE UNDER:

[Pay Item]{.underline} [Pay Unit]{.underline}

02730(1) Crushed aggregate base Cubic Yard

02730(2) Crushed aggregate base Ton

02730(3) Crushed aggregate surface Cubic Yard

02730(4) Crushed aggregate surface Ton

END OF SECTION