E-18-26_SPECS.pdf

PDF 205 KB Posted Mar 24, 2026

Attached to: 2026 - Aggregates
Solicitation number: E-18-26
Issued by: Natrona County, Wyoming

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Written by GovTribe AI · Apr 13, 2026

This is a technical specification document and bid solicitation from the City of Cheyenne, Wyoming, for the procurement of aggregates to support the Street and Alley Division. The City is requesting sealed bids for 9,500 tons of untreated sub-base and base materials, comprising 3,500 tons for City pickup and 6,000 tons for Board of Public Utilities pickup. The specification document outlines comprehensive ASTM standards and testing requirements for various aggregate types, including portland cement concrete aggregates, bituminous pavement aggregates, flexible pavement aggregates, plant mix bituminous base, wearing course materials, cover coat aggregates, drain materials, riprap, and filter aggregates. Bidders must demonstrate the ability to produce aggregates meeting stringent gradation requirements, with material sourcing requirements varying by application; aggregates for flexible pavements on collector or arterial streets must be sourced from granite quarries. The deadline for submitting questions is April 2, 2026, at 5:00 PM, with sealed bids due April 7, 2026, at 2:00 PM via the City's eProcurement Portal. No pre-bid meeting is scheduled. Following bid opening on April 7, the City Council will consider award on April 13, the Finance Committee will review on April 21, and final City Council approval is scheduled for April 27, 2026.

Bidders may submit offers on either an FOB pit basis for locations within 10 miles of specified addresses or FOB destination basis for locations exceeding 10 miles. Award will be made to the qualified, responsible Wyoming resident bidder submitting the lowest responsive bid, provided that the resident's bid does not exceed five percent more than the lowest qualified nonresident bidder, establishing a Wyoming residency preference. Wyoming materials and products of equal quality shall receive preference over out-of-state products. A bid guarantee of five percent of the total bid amount is required, submitted as either a certified cashier's check or bid bond from a surety company authorized to conduct business in Wyoming. Bidders must quote pricing on a per-unit cost and total cost basis for each line item. Liquidated damages are assessed at 0.10 percent per item per day or $30.00 per item per day, whichever is greater, for non-unavoidable delivery delays. Payment terms are net 30 days unless prompt payment discounts of less than 20 days are offered by the bidder. The City reserves the right to reject any or all bids, add or subtract quantities based on budget availability, and make award determinations based on cost per item.

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File	Type	Posted
2026_-_Aggregates.pdf	PDF	Mar 24, 2026
2026_-_Aggregates.pdf	PDF	Mar 24, 2026
E-18-26_SPECS.pdf	PDF	Mar 24, 2026
CITY_OF_CHEYENNE_BID_BOND_FORM.pdf	PDF	Mar 24, 2026
CITY_OF_CHEYENNE_BID_BOND_FORM.pdf	PDF	Mar 24, 2026

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02190 - 1 of 13 March, 2022

SECTION 02190

AGGREGATES

PART 1 GENERAL

1.01 SUMMARY

A. This section consists of preparation and stockpiling of aggregates for portland cement concrete, bases, bituminous pavements and surface treatments, cover coats, bed courses, drains, pervious backfill and riprap.

B. This section is a material specification only and is subsidiary to other sections which address placement of the materials.

1.02 RELATED WORK

A. Section 02210 - Excavation, Embankment, and Compaction.

B. Section 02225 - Trench Backfill.

C. Section 02226 - Backfilling for Appurtenances.

D. Section 02231 - Aggregate Subbase and Base Course.

E. Section 02273 - Riprap.

F. Section 02512 - Plant Mix Pavements.

G. Section 02515 - Asphalt Patching.

H. Section 02552 - Seal Coat.

I. Section 02553 - Bituminous Surface Treatment.

J. Section 03304 - Portland Cement Concrete.

02190 - 2 of 13 March, 2022

1.03 QUALITY ASSURANCE

A. ASTM C33: Standard Specification for Concrete Aggregates.

B. ASTM D75: Standard Practice for Sampling Aggregates.

C. ASTM C127: Standard Test Method for Density, Specific Gravity and Absorption of Coarse Aggregate.

D. ASTM C136: Standard Test Method for Sieve Analysis of Fine and

Coarse Aggregates.

E. ASTM C128: Standard Test Method for Density, Specific Gravity and Absorption of Fine Aggregate.

F. ASTM C131: Standard Test Method for Resistance to Degradation of Small Size Coarse Aggregate to Abrasion and Impact in the Los Angeles Machine.

G. ASTM C88: Standard Test Method for Soundness of Aggregates by

Use of Sodium Sulfate or Magnesium Sulfate.

H. ASTM C1260: Standard Test Method for Potential Alkali Reactivity of Aggregates (Mortar-Bar Method).

1.04 SUBMITTALS

A. Sampling and testing of aggregates for flexible pavements shall be in accordance with the following standard methods of the American Society for Testing and Materials:

1. Sampling ASTM D75

2. Percentage of Wear ASTM C131

3. Sieve Analysis ASTM C136

4. Sodium Sulfate Soundness ASTM C88

5. Specific Gravity and ASTM C127

Absorption of Coarse Aggregate

6. Specific Gravity and Absorption ASTM C128 of Fine Aggregate

02190 - 3 of 13 March, 2022

7. Sieve Analysis for Materials ASTM C117 Finer than 200 Sieve

B. Sampling and testing of aggregates for portland cement concrete shall be in accordance with the following standard methods of the American Society for Testing and Materials:

1. Fine Aggregate ASTM C33

2. Sieve Analysis ASTM C136

3. Percentage of Wear ASTM C131

4. Sodium Sulfate Soundness ASTM C88

5. Reactive Aggregate ASTM C1260

1.05 DEFINITIONS

A. Coarse aggregate shall mean materials retained on a #4 sieve.

B. Fine aggregate shall mean materials passing a #4 sieve.

C. Subbase shall be crushed subbase unless otherwise specified.

D. Base shall be crushed base unless otherwise specified.

E. Gradation requirements, as listed herein, shall be the percentage of material by weight passing laboratory sieves having square openings. Sieve sizes or designations shall be in accordance with

ASTM C33.

PART 2 PRODUCTS

2.01 MATERIALS

A. When crushed aggregate for subbase, bases, surfacing or bituminous pavements is specified, it shall be crushed to meet the required specifications.

B. Before production of any of the following materials, all vegetation and stripping material shall be removed from the pit. The composite materials shall be free from clay balls, vegetative matter, and other deleterious substances, and shall not contain an excess of thin or elongated pieces.

02190 - 4 of 13 March, 2022

2.02 AGGREGATE FOR PORTLAND CEMENT CONCRETE

A. Aggregate for concrete shall conform to ASTM C33. Testing and sampling for concrete aggregate shall be done in accordance with the applicable ASTM. Coarse aggregate shall follow the gradation limits as set forth in the table below:

COARSE AGGREGATE GRADATIONS

(% by Weight Passing)

SIEVE

DESIGNATION TYPE No. 57 TYPE No. 67

1-1/2" 100 100 1" 95 - 100 100

3/4" ------- 90 - 100 1/2" 25 – 60 ------- 3/8" ------ 20 - 55 # 4 0 – 10 0 - 10 # 8 0 – 5 0 - 5

# 200 0 – 3 0 - 3

2.03 AGGREGATE FOR UNTREATED SUBBASE AND BASE

A. The composite materials shall be free from clay balls, vegetable matter, and other deleterious substances, and shall not contain an excess of thin or elongated pieces.

B. Crushed subbase and crushed base shall be crushed stone or crushed gravel and an approved soil binder or natural filler, where required, conforming to the following requirements unless otherwise provided for in the Contract Documents or as approved by the

ENGINEER.

1. Coarse aggregate shall consist of hard, durable particles or fragments of stone or gravel. Materials that break up when alternately frozen and thawed or wetted and dried shall not be used. Unless otherwise specified, the coarse aggregate shall have a percentage of wear of not more than fifty (50) percent.

2. Fine aggregate shall consist of crushed stone, crushed gravel, or natural sand. The liquid limit shall not be more than thirty (30).

02190 - 5 of 13 March, 2022

3. Crushed base and crushed subbase shall meet one (1) of the following gradation requirements as specified in the Contract Documents.

CRUSHED BASE AND SUBBASE GRADATIONS

DESIGNATION

GRADING

2" 100 ------ ------ 100 ------ ------ 1-1/2" 90 - 100 90 - 100 ------ 90 - 100 100 100

1" ------ ------ 100 ------ 90 - 100 90 - 100 3/4" ------ ------ 90 - 100 ------ ------ ------ 1/2" ------ ------ 60 - 85 ------ ------ 60 - 85 # 4 50 - 85 ------ 45 - 65 35 - 75 40 - 65 45 - 65 # 8 40 - 70 ------ 33 - 53 ------ 30 - 55 33 - 53

# 200 2 - 15 0 - 15 3 - 12 0 - 15 3 - 15 3 - 12

C. Crusher run subbase and crusher run base shall be crusher run material of the maximum size as called for in the Contract Documents, not to exceed three (3) inches.

D. Pit run or screened subbase and base shall be pit run or screened material of the maximum size called for in the Contract Documents.

E. Placement of subbase materials with aggregates greater than three

(3) inches shall not be allowed unless provided for in the Contract Documents or as approved by the ENGINEER.

2.04 AGGREGATE FOR PLANT MIX BITUMINOUS BASE

A. Aggregate shall be composed of coarse and fine aggregates combined in the proper proportions to meet the grading requirements for Grading W of Subsection 2.03 herein, AGGREGATE FOR UNTREATED SUBBASE AND BASE, unless otherwise provided for in the Contract Documents or as approved by the ENGINEER. Aggregates shall be composed of clean, tough, durable fragments free from an excess of flat, elongated, soft, or disintegrated pieces and free from fragments coated with dirt or other objectionable matter.

B. Coarse aggregate shall be crushed stone, crushed gravel, or natural gravel.

02190 - 6 of 13 March, 2022

C. Fine aggregate shall consist of crushed stone, crushed gravel, or natural sand. The fraction passing the #40 sieve shall have a liquid limit not greater then twenty-five (25) and a plasticity index not greater than three (3), except that when the plasticity index is nonplastic (NP), the liquid limit shall be not more than thirty (30).

2.05 AGGREGATE FOR FLEXIBLE PAVEMENTS

A. When producing aggregates for flexible pavement which is to be applied to a street classified as a collector or arterial, aggregates shall be from a granite quarry. All aggregates shall be of uniform quality, crushed to size as necessary, and shall be composed of sound, tough, durable pebbles or fragments with or without natural or mineral fillers, as required. The aggregate shall be free from vegetable matter, lumps or balls of clay, adherent films of clay or other matter that would prevent thorough coating with bituminous material and shall be free from an excess of flat or elongated pieces.

The crushed aggregate shall have a percentage of wear of not more than forty (40), show a sodium sulfate loss of not more than twelve

(12) percent, and the plasticity index shall not exceed three (3) unless otherwise provided for in the Contract Documents or as approved by the ENGINEER.

B. Coarse aggregate shall be crushed stone or crushed gravel with one hundred (100) percent having one or more fractured faces and ninety-five (95) percent having two or more fractured faces. Coarse aggregate shall be of such gradation that when combined with other required aggregate fractions and fillers in proper proportion, the resultant mixture shall meet the gradation requirements under the composition of mixture for the specific material type. Only one (1) kind shall be used on the project except as approved by ENGINEER.

C. Fine aggregate shall consist of crushed stone, crushed gravel, or natural sand. Fine aggregate angularity shall be a minimum of forty-five (45) percent. Fine aggregate shall be of such gradation that when combined with other required aggregate fractions in proper proportion, the resultant mixture shall meet the gradation requirements under the composition of mixture for the specific material type. Only one (1) kind shall be used on the project except as approved by ENGINEER.

2.06 AGGREGATE FOR HOT PLANT MIX BITUMINOUS PAVEMENT

A. Type I Pavement aggregate shall be composed of coarse and fine aggregates combined as shown and in conformance with Subsection

2.04 herein, AGGREGATE FOR PLANT MIX BITUMINOUS

02190 - 7 of 13 March, 2022

BASE. Not approved for use in the CITY, unless approved in writing by the ENGINEER.

B. Type II Pavement aggregate material, prior to crushing, (one hundred (100) percent crushed) shall be of such size that not less than ninety-five (95) percent shall be retained on a sieve with square openings one-quarter (¼) inch larger than the maximum size mineral aggregate being produced, unless otherwise provided for in the Contract Documents or as approved by the ENGINEER.

C. Type III Pavement aggregate shall have not less than fifty (50) percent of the materials by weight retained on the #4 sieve with at least one (1) fractured face, unless a different percentage of fractured faces is otherwise specified in the Contract Documents. Not approved for use in the CITY, unless approved in writing by the

ENGINEER.

D. The aggregate fractions for the mixture shall be sized, graded, and combined, (including RAP when specified) in such proportions that the resulting composite blend meets one (1) of the grading requirements in the following table as specified in the Contract Documents. If not specified, CONTRACTOR shall use the three-quarter (¾) inch maximum material grading specification.

E. Crush and screen reclaimed asphalt pavement (RAP) greater than two (2) inch so that all material is prepared for recycling and a uniform mixture is maintained. Handle, screen, and crush material so as not to produce unnecessary fractured aggregate or cause undue degradation. Ensure that one hundred (100) percent of RAP used for recycled plant mix pavement passes through a two (2) inch sieve.

Stockpile in its own pile. Ensure that the combined virgin aggregate gradation meets the narrow band specification developed during the mix design.

02190 - 8 of 13 March, 2022

GRADATION REQUIREMENTS

Sieve Sizes 1” Max 3/8” Max ½” Max 3/8” Max 1-1/4” 100

1" 90-100 100 3/4" 65-90 90-100 100 1/2" 55-85 55-90 90-100 100 3/8" 40-75 45-85 55-90 90-100 # 4 30-60 30-65 35-70 45-85 # 8 20-45 20-50 20-55 30-65 # 30 5-25 5-30 5-30 10-40 # 200 2-7 2-7 2-7 2-7

2.07 AGGREGATE FOR PLANT MIX WEARING COURSE

A. The aggregate for plant mix wearing course shall be crushed stone or gravel composed of hard, durable pebbles or fragments and a filler of finely crushed stone, gravel, or sand, where required, to provide a composition of aggregates meeting the following requirements for the type specified:

TYPE OF AGGREGATE GRADATIONS

SIEVE DESIGNATION TYPE A TYPE B

1/2" 100 100 3/8" 97 - 100 97 - 100 # 4 25 - 45 20 - 40 # 8 10 - 25 10 - 20

# 200 2 - 7 2 - 7

B. The aggregate shall be free from vegetable matter, lumps, or balls of clay, adherent films of clay, or other matter that would prevent thorough coating with bituminous material. Unless otherwise shown on the plans, ninety-five (95) percent of the material by weight retained on the #4 sieve shall be particles having two fractured faces and ninety percent (90) percent having at least one (1) fractured face and shall have a percentage of wear of not more than thirty-five (35).

C. When either Type A or Type B wearing course is specified, the aggregate material, prior to crushing, shall be of such size that not less than ninety-seven (97) percent shall be retained on a sieve with

02190 - 9 of 13 March, 2022 square openings of three-eighths (⅜) inch.

2.08 AGGREGATE FOR COVER COAT

A. Only one (1) type of aggregate shall be used on the project unless alternate types are approved in writing by the ENGINEER.

B. Cover aggregate for seal coats shall be crushed stone, crushed ledge rock, crushed or natural gravel, or sand.

02190 - 10 of 13 March, 2022

C. Cover aggregate material for bituminous surface treatment shall consist of clean, tough, durable fragments free from an excess of flat, elongated, soft or disintegrated pieces and free from coatings of dirt or other objectionable matter. The aggregate shall have neither a percentage of wear of more than forty (40) nor a plasticity index in excess of three (3). The aggregate material shall be well graded from coarse to fine within the following limits:

COVER COAT AGGREGATE GRADATION

SIEVE DESIGNATION % BY WEIGHT PASSING

3/4" 100 1/2" 95 - 100 # 4 50 - 70 # 8 33 - 63

# 200 3 - 10

D. Type A, B, C, D, E and S aggregate material produced shall be well graded from coarse to fine within the following limits:

TYPE AGGREGATE FOR COVER COAT

DESIGNATION TYPE A TYPE B TYPE C TYPE D TYPE E TYPE S

1" 100 ------ ------ ------ ------ ------ 3/4" 95 - 100 100 ------ 100 100 ------ 1/2" 30 - 60 95 - 100 100 95 - 100 95 - 100 100 3/8" ------ ------ 95 - 100 ------ ------ 95 - 100 # 4 0 - 15 0 - 15 0 - 20 0 - 15 35 - 70 85 - 100 # 8 0 - 7 0 - 7 0 - 5 ------ ------ ------

# 200 0 - 2 0 - 2 0 - 2 0 - 10 0 - 10 0 - 5

E. Material used for the production of Type A, B, or C cover aggregate shall be stone, ledge rock, or boulder of such size that prior to crushing not more than five (5) percent will pass a three-quarter (¾) inch screen for Type A or a one-half (½) inch screen for Type B and Type C.

F. Type D cover aggregate shall be crushed stone, crushed gravel, or clean pea gravel.

02190 - 11 of 13 March, 2022

G. Types A, B, C, or D shall have a percentage of wear of not more than thirty-five (35), unless otherwise provided for in the Contract Documents or as approved by the ENGINEER.

H. Type E cover aggregate shall be crushed sand-gravel. Type S cover aggregate shall be screened or pit-run sand. The plasticity index of either Type E or Type S shall not exceed three (3).

2.09 AGGREGATE FOR FILLER

A. Filler shall consist of clean, hard, durable grains of naturally occurring granular material taken either from locations shown on the plans or from approved sources as otherwise specified in the Contract Documents.

2.10 AGGREGATE FOR BED COURSE MATERIAL

A. Bed course material for sidewalks and curbing shall consist of graded gravel, crushed stone, or other approved material of such that all particles shall pass through a sieve having one-half (½) inch square openings.

2.11 AGGREGATE FOR DRAINS

A. Gravel for drains shall be crushed or natural sand and gravel or other approved free-draining material. The material shall be uniformly graded from coarse to fine within the following gradation requirements for the material type indicated in the Contract Documents. When the grading is not indicated in the Contract Documents, Grading B shall be used.

02190 - 12 of 13 March, 2022

GRADATION FOR DRAIN AGGREGATES

DESIGNATION GRADING A GRADING B GRADING C

2" 100 ------ ------

1 - 1/2" 95 - 100 100 ------ 1" ------ 95 - 100 ------

3/4" 35 - 70 ------ 100 3/8" 10 - 30 ------ 95 - 100 # 4 0 - 5 0 - 10 ------ # 8 ------ ------ 45 - 95 # 16 ------ ------ 5 - 45 # 100 ------ ------ 0 - 10

2.12 AGGREGATE FOR PERVIOUS BACKFILL MATERIAL

A. Pervious backfill material shall consist of gravel, crushed gravel, crushed rock, natural sands, manufactured sands, or combinations thereof, and shall meet the following gradation requirements:

PERVIOUS BACKFILL GRADATION

2" 100 # 4 0 - 50 # 30 0 - 35 # 100 0 - 10 # 200 0 - 4

B. In addition, the fraction passing the #40 sieve shall be non-plastic

(NP) and shall have a liquid limit not greater than thirty (30).

2.13 AGGREGATE FOR RIPRAP

A. Aggregate for riprap shall be hard, durable, crushed quarried, or natural stone having an apparent specific gravity of 2.4 or greater.

The absorption shall not exceed four (4) percent unless otherwise provided for in the Contract Documents or as approved by the ENGINEER. The stone shall be free of weak lamination and cleavages, and shall be of a quality that will not disintegrate on exposure to water or weathering. The aggregate for the various types of riprap shall meet the following additional requirements.

02190 - 13 of 13 March, 2022

1. Class 1 riprap aggregate shall consist of two (2) sizes of stone.

a. Primary stones shall be not less than three (3) inches thick and shall weigh not less than fifty (50) pounds.

At least sixty (60) percent of the stones shall weigh more than eighty (80) pounds each.

b. Choke stones shall be fragments or spalls of the proper size to satisfactorily wedge between the primary stones as placed.

2. Class 2 riprap aggregate shall be graded with a sufficient amount of smaller stones uniformly distributed throughout.

At least sixty (60) percent of the stones shall weigh more than eighty (80) pounds each.

3. Grouted riprap aggregate shall conform to the specifications for Class 1 or Class 2 riprap. If not specified, Class 1 riprap shall be used.

4. Wire enclosed riprap aggregate shall be round or angular stones. Not less than ninety-five (95) percent of the stone shall be retained on a screen or wire having two (2) inch square openings.

5. Sacked concrete riprap aggregate shall consist of either a sandy or gravelly pit-run material. This material shall be clean and free from roots, vegetable matter, or other deleterious substances. The aggregate shall meet the following gradation requirements:

SACKED CONCRETE RIPRAP AGGREGATE GRADATION

DESIGNATION % BY WEIGHT PASSING

2 " 80 - 100 # 4 0 - 4

02190 - 14 of 13 March, 2022

2.14 AGGREGATE FOR RIPRAP FILTER

A. Filter aggregates for riprap shall be hard, durable particles or fragments of crushed stone or natural gravel, screened or crushed to meet the following gradation requirements:

FILTER AGGREGATE AGRADATIONS

3 " 100 # 4 20 - 50

# 200 0 - 10

PART 3 EXECUTION

3.01 PROTECTION FOR AGGREGATE

A. The equipment and methods utilized in the production, storage, transportation and final placement of aggregate materials shall be such as to provide in-place materials meeting all requirements as specified.

PART 4 METHOD OF MEASUREMENT AND BASIS OF PAYMENT

4.01 METHOD OF MEASUREMENT

A. No separate measurement shall be made for items under this section.

4.02 BASIS OF PAYMENT

A. No separate payment shall be made for items under this section. Full compensation shall be considered as included in the prices paid for the various contract items and no additional compensation shall be allowed therefore.

END OF SECTION

B. This section is a material specification only and is subsidiary to other sections which address placement of the materials.

A. Section 02210 - Excavation, Embankment, and Compaction.

B. Section 02225 - Trench Backfill.

C. Section 02226 - Backfilling for Appurtenances.

D. Section 02231 - Aggregate Subbase and Base Course.

E. Section 02273 - Riprap.

F. Section 02512 - Plant Mix Pavements.

G. Section 02515 - Asphalt Patching.

H. Section 02552 - Seal Coat.

I. Section 02553 - Bituminous Surface Treatment.

J. Section 03304 - Portland Cement Concrete.

A. ASTM C33: Standard Specification for Concrete Aggregates.

B. ASTM D75: Standard Practice for Sampling Aggregates.

C. ASTM C127: Standard Test Method for Density, Specific Gravity and Absorption of Coarse Aggregate.

D. ASTM C136: Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates.

E. ASTM C128: Standard Test Method for Density, Specific Gravity and Absorption of Fine Aggregate.

F. ASTM C131: Standard Test Method for Resistance to Degradation of Small Size Coarse Aggregate to Abrasion and Impact in the Los Angeles Machine.

G. ASTM C88: Standard Test Method for Soundness of Aggregates by Use of Sodium Sulfate or Magnesium Sulfate.

H. ASTM C1260: Standard Test Method for Potential Alkali Reactivity of Aggregates (Mortar-Bar Method).

A. Sampling and testing of aggregates for flexible pavements shall be in accordance with the following standard methods of the American Society for Testing and Materials:

2. Percentage of Wear ASTM C131

3. Sieve Analysis ASTM C136

4. Sodium Sulfate Soundness ASTM C88

5. Specific Gravity and ASTM C127

6. Specific Gravity and Absorption ASTM C128

B. Sampling and testing of aggregates for portland cement concrete shall be in accordance with the following standard methods of the American Society for Testing and Materials:

1. Fine Aggregate ASTM C33

2. Sieve Analysis ASTM C136

3. Percentage of Wear ASTM C131

4. Sodium Sulfate Soundness ASTM C88

5. Reactive Aggregate ASTM C1260

A. Coarse aggregate shall mean materials retained on a #4 sieve.

B. Fine aggregate shall mean materials passing a #4 sieve.

C. Subbase shall be crushed subbase unless otherwise specified.

D. Base shall be crushed base unless otherwise specified.

E. Gradation requirements, as listed herein, shall be the percentage of material by weight passing laboratory sieves having square openings. Sieve sizes or designations shall be in accordance with ASTM C33.

A. When crushed aggregate for subbase, bases, surfacing or bituminous pavements is specified, it shall be crushed to meet the required specifications.

A. The composite materials shall be free from clay balls, vegetable matter, and other deleterious substances, and shall not contain an excess of thin or elongated pieces.

2. Fine aggregate shall consist of crushed stone, crushed gravel, or natural sand. The liquid limit shall not be more than thirty (30).

3. Crushed base and crushed subbase shall meet one (1) of the following gradation requirements as specified in the Contract Documents.

C. Crusher run subbase and crusher run base shall be crusher run material of the maximum size as called for in the Contract Documents, not to exceed three (3) inches.

D. Pit run or screened subbase and base shall be pit run or screened material of the maximum size called for in the Contract Documents.

E. Placement of subbase materials with aggregates greater than three (3) inches shall not be allowed unless provided for in the Contract Documents or as approved by the ENGINEER.

B. Coarse aggregate shall be crushed stone, crushed gravel, or natural gravel.

A. Type I Pavement aggregate shall be composed of coarse and fine aggregates combined as shown and in conformance with Subsection 2.04 herein, AGGREGATE FOR PLANT MIX BITUMINOUS BASE. Not approved for use in the CITY, unless approved in writing by th...

TYPE OF AGGREGATE GRADATIONS

(% by Weight Passing)

A. Only one (1) type of aggregate shall be used on the project unless alternate types are approved in writing by the ENGINEER.

B. Cover aggregate for seal coats shall be crushed stone, crushed ledge rock, crushed or natural gravel, or sand.

COVER COAT AGGREGATE GRADATION

F. Type D cover aggregate shall be crushed stone, crushed gravel, or clean pea gravel.

G. Types A, B, C, or D shall have a percentage of wear of not more than thirty-five (35), unless otherwise provided for in the Contract Documents or as approved by the ENGINEER.

H. Type E cover aggregate shall be crushed sand-gravel. Type S cover aggregate shall be screened or pit-run sand. The plasticity index of either Type E or Type S shall not exceed three (3).

A. Pervious backfill material shall consist of gravel, crushed gravel, crushed rock, natural sands, manufactured sands, or combinations thereof, and shall meet the following gradation requirements:

B. In addition, the fraction passing the #40 sieve shall be non-plastic (NP) and shall have a liquid limit not greater than thirty (30).

A. Aggregate for riprap shall be hard, durable, crushed quarried, or natural stone having an apparent specific gravity of 2.4 or greater. The absorption shall not exceed four (4) percent unless otherwise provided for in the Contract Documents or as ap...

1. Class 1 riprap aggregate shall consist of two (2) sizes of stone.

a. Primary stones shall be not less than three (3) inches thick and shall weigh not less than fifty (50) pounds. At least sixty (60) percent of the stones shall weigh more than eighty (80) pounds each.

b. Choke stones shall be fragments or spalls of the proper size to satisfactorily wedge between the primary stones as placed.

2. Class 2 riprap aggregate shall be graded with a sufficient amount of smaller stones uniformly distributed throughout. At least sixty (60) percent of the stones shall weigh more than eighty (80) pounds each.

3. Grouted riprap aggregate shall conform to the specifications for Class 1 or Class 2 riprap. If not specified, Class 1 riprap shall be used.

4. Wire enclosed riprap aggregate shall be round or angular stones. Not less than ninety-five (95) percent of the stone shall be retained on a screen or wire having two (2) inch square openings.

A. Filter aggregates for riprap shall be hard, durable particles or fragments of crushed stone or natural gravel, screened or crushed to meet the following gradation requirements:

3.01 PROTECTION FOR AGGREGATE

A. No separate measurement shall be made for items under this section.

END OF SECTION

File details come from the government source that posted it. Updated Apr 13, 2026.