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Gravel Names by State: What Your DOT Calls 2A, No. 57 and Crusher Run

A how-to written in Pennsylvania says 2A. One from Virginia says 21A, and one from Ohio says 304. They’re all dense-graded base stone, but each state’s department of transportation writes its own road specifications, and the names change at the state line. Here’s what each state’s DOT calls the four kinds of stone used most in hardscaping and site work, with the gradation (how much passes each sieve) wherever we could tie it to the spec, and a translator that shows what neighboring states call the same material. 18 states are checked so far; we’re adding the rest in batches.

Quick answer

There’s no national name for most gravel. Clean stone mostly follows the AASHTO M 43 size numbers, so No. 57 is No. 57 in most of the states we’ve checked: 13 of 18 use or allow a size by that name, while Michigan, Illinois, Massachusetts, Connecticut and Wisconsin list no No. 57. Dense-graded base, the mix of crushed stone and fines that goes under patios and driveways, gets a different name almost everywhere: 2A in Pennsylvania, DGA in New Jersey and Kentucky, 21A and 21B in Virginia, ABC in North Carolina, 21AA in Michigan, CA 6 in Illinois, Item 304 in Ohio. Pick your state below to see its names, and use the translator to see what the neighboring states call the same thing.

18states checked against DOT specs or DOT training material so far

13of them use or allow a size named No. 57

5list no No. 57 (Michigan, Illinois, Massachusetts, Connecticut, Wisconsin)

M 43the AASHTO size standard behind No. 57 and Nos. 1 to 4

The four kinds of stone, in plain English

Dense-graded base (road base; Maryland, West Virginia, Connecticut and Massachusetts specs name a version of it crusher run, and in Pennsylvania it’s often called modified): crushed stone with every size from the top size down to fine dust, so it compacts into a hard layer. It’s what goes under patios, walks, slabs and gravel driveways. The top size runs from about 1 inch to 3 inches depending on the state and the mix.
No. 57 clean stone: stone with almost no fines. AASHTO No. 57 is 100% passing 1 1/2 in., 95–100% passing 1 in., 25–60% passing 1/2 in., 0–10% passing the No. 4 sieve and 0–5% passing the No. 8. In road specs it’s a standard concrete and drainage stone: Maryland’s table row is “57 and Underdrain,” and Kentucky lists it for concrete, traffic-bound base and drainage blankets.
Big clean stone (Nos. 1 to 4): larger rock with the fines screened out. New Jersey’s spec prints the nominal sizes: No. 1 is 3 1/2 to 1 1/2 in., No. 2 is 2 1/2 to 1 1/2 in., No. 3 is 2 to 1 in. and No. 4 is 1 1/2 to 3/4 in. Maryland uses No. 1 as slope stone and Wisconsin uses No. 4 for slope paving. Several states don’t list all four.
Sand and screenings: concrete sand (fine aggregate), mortar sand and stone screenings, the fines from crushing. Names run from Type A (Pennsylvania) and 2NS or 2SS (Michigan) to FA 1 (Illinois), 10 NS (Georgia) and FA-10 (South Carolina).

Translate a gravel name

Pick your state and a kind of stone. You’ll see your state’s spec name and what each neighboring state calls the same kind of material. Neighbors we haven’t checked yet show as not checked.

Your state:Kind of stone:Names come from the state table below, so the translator and the table always match. Planning information, not a survey or engineering. Call 811 and check with your local office.

Builder’s note: In central Pennsylvania we put 6 inches of compacted 2A modified under patios, more on clay or wet ground, and use clean No. 57 (2B in the old Pennsylvania numbers) behind walls and around drain pipe. If you’re following a how-to written in another state, translate the base name above, then ask your yard for the product’s gradation sheet. The name on the ticket matters less than what passes the No. 4 and No. 200 sieves.

Find your state:Jumps to your state’s full entry, with its sources.

Gravel names in the states we've checked

State	Dense-graded base	No. 57 or nearest	Big clean stone	Sand and screenings
Connecticut	Processed Aggregate Base · Crusher-Run Stone (Grading A) · Subbase gravel (Grading B)	No. 67 (nearest; no No. 57)	No. 3 · No. 4	Fine aggregate (Table M.01.04-1) · Screenings · Dust
Delaware	Graded Aggregate Base Course (GABC), Type B	Delaware No. 57 Stone (size 57; not identical to AASHTO No. 57)	Size 1 · Size 2 · Delaware No. 3 Stone	Concrete Sand
Georgia	Graded Aggregate, Group I · Group II	Size No. 57	Size No. 3 · Size No. 4	10 NS (natural concrete sand) · 10 SM (manufactured concrete sand)
Illinois	CA 6 · CA 10	CA 7 or CA 11 (nearest; not No. 57)	None recorded	FA 1 · FA 2 (washed sand)
Indiana	No. 53 · No. 73	AASHTO No. 57 (INDOT has no numbered 57)	None recorded	Size No. 23 (concrete sand) · Size No. 15 (mortar sand)
Kentucky	DGA (Dense Graded Aggregate) · CSB (Crushed Stone Base) · Size No. 610	Size No. 57	Size No. 1 · Size No. 2 · Size No. 3 · Size No. 4	Fine aggregate for concrete · Size No. 10
Maryland	Graded Aggregate for Base Course · Crusher Run Aggregate CR-6	Size 57	Stone for Slopes (AASHTO No. 1)	Fine Aggregate for concrete, underdrain and pneumatic mortar · Fine Aggregate/Sand for mortar and epoxies
Massachusetts	Dense Graded Crushed Stone for Sub-base · Processed Gravel for Subbase (“crusher run gravel”) · Gravel Borrow	None (crushed stone named by inch size)	1 1/2 in. crushed stone	Fine aggregate (AASHTO M 6) · Stone Screenings · Sand Borrow
Michigan	21AA · 21A · 22A	6AA or 6A (nearest; not No. 57)	None recorded	2NS (natural sand) · 2SS (stone sand)
Minnesota	Not checked yet	Not checked yet	Not checked yet	Not checked yet
New Jersey	Dense-Graded Aggregate (DGA)	No. 57	No. 1 · No. 2 · No. 3 · No. 4	Fine aggregate for concrete, mortar and grout
New York	Not checked yet	Not checked yet	Not checked yet	Not checked yet
North Carolina	ABC (Aggregate Base Course)	No. 57 (also 57M)	No. 4 (largest listed)	Std. Size 2S · Stone screenings
Ohio	Item 304 aggregate · Item 411 aggregate	Size No. 57	Not recorded yet	Fine aggregate for portland cement concrete
Pennsylvania	No. 2A · Select Granular Material (2RC)	No. 57 (also called 2B)	No. 1 · No. 3 (also called 3A)	Type A fine aggregate (concrete sand) · Type C fine aggregate (mortar sand)
South Carolina	Graded Aggregate Base (Macadam or Marine Limestone) · Aggregate No. CR-14	Aggregate No. 57	Aggregate No. 5 (largest listed)	FA-10 · FA-10M
Tennessee	Mineral Aggregate Base Type A (Grading D) · Type B (Grading C)	Size No. 57	Size No. 1 · Size No. 2 · Size No. 3 · Size No. 4	Fine Aggregate for Concrete · Size No. 10 limestone screenings
Virginia	Size No. 21A · Size No. 21B	Size No. 57	Size No. 1 · Size No. 2 · Size No. 3	Fine Aggregate Grading A
West Virginia	Class 1 · Class 2	No. 57	No. 1 · No. 2 · No. 3	Fine aggregate (alternate grading) · No. 10 (screenings)
Wisconsin	3/4-inch, 1 1/4-inch and 3-inch dense-graded base · Select crushed material · Breaker run	AASHTO No. 67 (nearest; no No. 57)	AASHTO No. 4	Fine aggregate (combined gradation only)

Names from each state DOT’s standard specifications. “Nearest” means the state lists no No. 57 and this is its closest clean stone. Gradations, spec sections and sources for each state are below.

State-by-state details

ConnecticutPartly confirmed

Spec checked: CTDOT: Standard Specifications, Form 819 (2024), with Supplemental Specifications January 2026.
Dense-graded base: Processed Aggregate Base: processed aggregate base and pavement
Made from gravel, broken stone or reclaimed misc. aggregate (max 2% asphalt cement) combined with natural sand, stone sand or screenings.
% passing: 2 1/2 in 100 · 2 in 95-100 · 3/4 in 50-75 · 1/4 in 25-45 · No. 40 5-20 · No. 100 2-12
The combined table has no No. 200 row; M.05.01 caps the fine-aggregate part at 8% passing No. 200.
M.05.01, Table M.05.01-1

Crusher-Run Stone (Grading A): subbase; Grading A also governs Granular Fill (M.02.01) and Granular Base (M.02.03)
Made from sound, tough, durable broken stone; LA abrasion max 50%.
M.02.02; gradation M.02.06 Grading A

Subbase (bank or crushed gravel, Grading B): subbase
Made from crushed or uncrushed gravel; reclaimed misc. aggregate also Grading B.
M.02.02; gradation M.02.06 Grading B
No. 57 or nearest: No. 67 (nearest; CTDOT lists no No. 57): Table M.01.02-2 lists only Nos. 3, 4, 6, 67, 8 and 9, and “No. 57” doesn't appear in M.01 to M.03
M.01.02, Table M.01.02-2
Big clean stone: No. 3
M.01.02, Table M.01.02-2

No. 4
M.01.02, Table M.01.02-2
Sand and screenings: Fine aggregate (Table M.01.04-1): portland cement concrete (M.03 says fine aggregate shall meet M.01)
% passing: 3/8 in 100 · No. 4 95-100 · No. 8 80-100 · No. 16 50-85 · No. 30 25-60 · No. 50 10-30 · No. 100 2-10
M.01.04, Table M.01.04-1

Screenings
M.01.03, Table M.01.03-2

Dust
M.01.03, Table M.01.03-2
Good to know: Connecticut's “crusher-run stone” is a subbase material. Gradings A and B and the coarse sizes are named only here because their table columns couldn't be read.

Sources: CTDOT manuals and specifications · CTDOT Form 819 with January 2026 supplementals (PDF)

DelawareNames only

Spec checked: DelDOT: 2025 Standard Specifications for Road and Bridge Construction, Revision #1 (January 2026).
Dense-graded base: Graded Aggregate Base Course (GABC), Type B: base on prepared subgrade or subbase (Sec. 301)
Made from quarried stone and stone dust, recycled concrete aggregate or bituminous millings (Sec. 1005.2.D).
Sec. 1005; gradation in Sec. 1004.2, Table 1004.2-1, p. 635 (table), p. 637 (Sec. 1005)
No. 57 or nearest: Delaware No. 57 Stone (size 57): pay item 302005, Sec. 302
Not treated as identical to AASHTO No. 57: DelDOT's row prints one more limit than the AASHTO No. 57 rows in PennDOT's and Maryland's tables.
Sec. 1004.2, Table 1004.2-1, p. 635
Big clean stone: Size 1
Sec. 1004.2, Table 1004.2-1, p. 635

Size 2
Sec. 1004.2, Table 1004.2-1, p. 635

Delaware No. 3 Stone (size 3): pay item 302002, Sec. 302
Sec. 1004.2, Table 1004.2-1, p. 635
Sand and screenings: Concrete Sand: fine aggregate (Sec. 1003)
Sec. 1003.1, Table 1003.1-1, p. 634
Good to know: We list DelDOT's names only: its aggregate tables lose their column layout in the published PDF text, so we couldn't tie each number to a sieve. See Table 1004.2-1 in the spec.

Sources: DelDOT 2025 Standard Specifications, Rev. 1 (PDF)

GeorgiaFrom GDOT section files

Spec checked: GDOT: Standard Specifications, 2021 edition, with the 2021 Supplemental Specifications, 2024 Edition.
Dense-graded base: Graded Aggregate, Group I: graded aggregate base, subbase, or shoulder material
Made from limestone, dolomite, marble, or any combination (800.2.01.A.2).
% passing: 2 in 100 · 1 1/2 in 95-100 · 3/4 in 60-95 · No. 10 25-50 · No. 60 10-35 · No. 200 7-15
Sec. 815 (rev. Aug. 22, 2023), 2024 Supplemental Specifications, p. 441

Graded Aggregate, Group II: graded aggregate base, subbase, or shoulder material
Made from slag, gravel, granitic and gneissic rocks, quartzite, synthetic aggregate, or any combination (Sec. 800).
% passing: 2 in 100 · 1 1/2 in 95-100 · 3/4 in 60-90 · No. 10 25-45 · No. 60 5-30 · No. 200 4-11
Sec. 815 (rev. Aug. 22, 2023), 2024 Supplemental Specifications, p. 441
No. 57 or nearest: Size No. 57: same as AASHTO No. 57
% passing: 1 1/2 in 100 · 1 in 95-100 · 1/2 in 25-60 · No. 4 0-10 · No. 8 0-5
Sec. 800, Table 800.1 Sizes of Coarse Aggregates
Big clean stone: Size No. 3: largest size in Table 800.1 (no No. 1 or 2)
% passing: 2 1/2 in 100 · 2 in 90-100 · 1 1/2 in 35-70 · 1 in 0-15 · 1/2 in 0-5
Sec. 800, Table 800.1

Size No. 4
% passing: 2 in 100 · 1 1/2 in 90-100 · 1 in 20-55 · 3/4 in 0-15 · 3/8 in 0-5
Sec. 800, Table 800.1
Sand and screenings: Size No. 10 NS (natural concrete sand): portland cement concrete
% passing: 3/8 in 100 · No. 4 95-100 · No. 16 45-95 · No. 50 5-30 · No. 100 0-10 · No. 200 0-3
Sec. 801 (rev. Feb. 10, 2023), item “7. Grades,” 2024 Supplemental Specifications, p. 433

Size No. 10 SM (standard manufactured concrete sand): portland cement concrete
% passing: 3/8 in 100 · No. 4 95-100 · No. 16 45-95 · No. 50 8-30 · No. 100 1-10 · No. 200 0-4
Sec. 801 (rev. Feb. 10, 2023), item “7. Grades,” 2024 Supplemental Specifications, p. 433
Good to know: Table 800.1 comes from GDOT's own Section 800 file; the full 2021 book wouldn't open for us, but the same rows appear in GDOT's 2024 aggregate study guide.

Sources: GDOT The Source (specifications) · GDOT 2021 Supplemental Specifications, 2024 Edition (PDF) · GDOT Section 800, Coarse Aggregate (PDF) · GDOT Aggregate Certification Study Guide

IllinoisPartly confirmed

Spec checked: IDOT: Standard Specifications for Road and Bridge Construction, adopted Jan. 1, 2022, with the supplemental specifications adopted Jan. 1, 2026.
Dense-graded base: CA 6: Aggregate Base Course; Subbase Granular Material Type A and B; aggregate surface course Type A and B; aggregate shoulders
Made from gravel, crushed gravel, crushed stone, crushed concrete, crushed slag, or crushed sandstone (1004.04).
Art. 1004.04; Art. 1004.01(c); pp. 763-764, 771-772

CA 10: same uses as CA 6
Made from same materials as CA 6 (1004.04).
Art. 1004.04; Art. 1004.01(c); pp. 763-764, 771-772
No. 57 or nearest: CA 7 or CA 11 (nearest; IDOT has no size 57): named together for Subbase Granular Material Type C (1004.04) and for porous granular embankment/backfill and French drains (1004.05(c))
Neither one matches the AASHTO No. 57 limits.
Art. 1004.01(c); 1004.04; 1004.05(c); pp. 764-765, 772, 774
Big clean stone: No AASHTO-numbered sizes; IDOT’s larger CA 1, CA 3 and CA 5 couldn’t be tied to sieves.
Sand and screenings: FA 1 / FA 2 (washed sand): portland cement concrete (1003.02(c)); washed stone sand FA 20 also allowed
Art. 1003.02(c); Art. 1003.01(c); pp. 753-754, 756
Good to know: We list IDOT's names only: its gradation tables lose their column layout in the published PDF text, so we couldn't tie each number to a sieve.

Sources: IDOT Standard Specifications page · IDOT 2022 Standard Specifications

IndianaPartly confirmed

Spec checked: INDOT: 2026 Standard Specifications (lettings Sep. 1, 2025 through Aug. 31, 2027).
Dense-graded base: No. 53 (Compacted Aggregate, No. 53): aggregate base (301 pay item), subbase separation layer (302), aggregate pavements/shoulders (303), concrete bases (305)
Made from Coarse Aggregate, Class D or Higher, Size No. 53; dense graded; LL max 25 (35 if slag), PI max 5 (904.03(e) note 1).
904.03(e) Sizes of Coarse Aggregates; Secs. 301-303, 305; pp. 1025-1026

No. 73 (Compacted Aggregate, No. 73): surface course of aggregate pavements/shoulders when specified (303); concrete bases (305)
Made from Coarse Aggregate, Class D or Higher, Size No. 73; dense graded.
904.03(e); Secs. 303, 305; p. 1025, p. 267
No. 57 or nearest: AASHTO No. 57 (INDOT has no numbered No. 57): 904.05 allows “Coarse aggregate No. 5, No. 8, No. 9, No. 11, No. 12, No. 53, No. 73, or AASHTO No. 57” for structure backfill; where an AASHTO size is specified, gradation follows AASHTO M 43 (904.03(e))
904.05; 904.03(e); pp. 1027-1029
Big clean stone: No AASHTO-numbered sizes; INDOT’s largest, No. 2, couldn’t be tied to sieves.
Sand and screenings: Fine Aggregate, Size No. 23: PCC pavement (501.03); 904.02(a) requires natural sand for PCCP and bridge decks
904.02(h); 501.03; p. 1019, p. 407

Fine Aggregate, Size No. 15 (mortar sand): mortar; natural sand (904.02(e))
904.02(e); 904.02(h); p. 1019
Good to know: We list INDOT's names only: its size tables lose their column layout in the published PDF text, so we couldn't tie each number to a sieve. See Section 904 in the spec.

Sources: INDOT 2026 Standard Specifications · INDOT 2026 Section 900 (PDF) · INDOT 2026 Section 300 (PDF)

KentuckyCurrent DOT spec

Spec checked: KYTC: Standard Specifications for Road and Bridge Construction, 2026 edition.
Dense-graded base: DGA (Dense Graded Aggregate): dense graded aggregate base (Sec. 302); also allowed for traffic-bound base
Made from crushed stone, sand equivalent 30 or greater, mineral filler may be added (805.06).
% passing: 1 in 100 · 3/4 in 70-100 · 3/8 in 50-80 · No. 4 30-65 · No. 30 10-40 · No. 200 4-13
Sec. 302; 805.06; DGA table following 805.15, p. 805-14

CSB (Crushed Stone Base): crushed stone base (Sec. 302)
Made from crushed stone, sand equivalent 30 or greater (805.06).
% passing: 2 1/2 in 100 · 1 1/2 in 90-100 · 3/4 in 60-95 · 3/8 in 30-70 · No. 4 15-55 · No. 30 5-20 · No. 200 0-8
Sec. 302; 805.06; CSB table following 805.15, p. 805-13

Size No. 610: traffic-bound base, aggregate surfacing, maintenance; a Kentucky size with no AASHTO equivalent
% passing: 1 1/2 in 100 · 1 in 85-100 · 1/2 in 40-75 · No. 4 15-40
Sec. 301; 805.14; No. 610 table following 805.15, p. 805-10
No. 57 or nearest: Size No. 57: same as AASHTO No. 57; listed for JPC base/Class P and Class B concrete, traffic-bound base and cement-treated drainage blanket
% passing: 1 1/2 in 100 · 1 in 95-100 · 1/2 in 25-60 · No. 4 0-10 · No. 8 0-5
Sec. 805, No. 57 table following 805.15, p. 805-10
Big clean stone: Size No. 1
% passing: 4 in 100 · 3 1/2 in 90-100 · 2 1/2 in 25-60 · 1 1/2 in 0-15 · 3/4 in 0-5
Sec. 805, table following 805.15, p. 805-7

Size No. 2
% passing: 3 in 100 · 2 1/2 in 90-100 · 2 in 35-70 · 1 1/2 in 0-15 · 3/4 in 0-5
Sec. 805, table following 805.15, p. 805-8

Size No. 3
% passing: 2 1/2 in 100 · 2 in 90-100 · 1 1/2 in 35-70 · 1 in 0-15 · 1/2 in 0-5
Sec. 805, table following 805.15, p. 805-8

Size No. 4
% passing: 2 in 100 · 1 1/2 in 90-100 · 1 in 20-55 · 3/4 in 0-15 · 3/8 in 0-5
Sec. 805, table following 805.15, p. 805-9
Sand and screenings: Fine aggregate for concrete: portland cement concrete (804.03)
% passing: 3/8 in 100 · No. 4 90-100 · No. 16 45-85 · No. 50 5-25 · No. 100 0-8
804.03, p. 804-2

Size No. 10: listed in the coarse aggregate size tables “for convenience”; not a coarse aggregate
% passing: 3/8 in 100 · No. 4 85-100 · No. 100 10-30
Sec. 805, No. 10 table following 805.15, p. 805-13
Good to know: KYTC's aggregate sections (804 and 805) don't use the terms “crusher run” or “screenings”; its base stones are DGA and CSB.

Sources: KYTC Standard Specifications page · KYTC 2026 Division 800 (PDF) · KYTC 2026 Division 300 (PDF)

MarylandCurrent DOT spec

Spec checked: MDOT SHA: 2026 Standard Specifications for Construction and Materials (effective July 1, 2026).
Dense-graded base: Graded Aggregate for Base Course: untreated aggregate base course (Sec. 501); Table 901 A row “Graded Aggregate – Base Design Range”
Made from aggregate per 901.01; recycled concrete graded aggregate also allowed in Sec. 501 (900.03.02).
% passing: 2 in 100 · 1 1/2 in 95-100 · 3/4 in 70-92 · 3/8 in 50-70 · No. 4 35-55 · No. 30 12-25 · No. 200 0-8 (design range; production tolerances apply)
Sec. 901.01, Table 901 A, pp. 924-925

Crusher Run Aggregate CR-6: not to be used in the structural part of any Administration project (note f)
Made from aggregate; RAP up to 15% allowed (note g).
% passing: 2 in 100 · 1 1/2 in 90-100 · 3/4 in 60-90 · No. 4 30-60 · No. 200 0-15
Sec. 901.01, Table 901 A, pp. 924-925
No. 57 or nearest: Size 57 (Table 901 A row “57 and Underdrain”): same as AASHTO No. 57
% passing: 1 1/2 in 100 · 1 in 95-100 · 1/2 in 25-60 · No. 4 0-10 · No. 8 0-5
Note (h): recycled concrete prohibited in drainage applications.
Sec. 901.01, Table 901 A, pp. 924-925
Big clean stone: Stone for Slopes (M 43 size number 1): AASHTO No. 1
Sec. 901.04, p. 930
Sand and screenings: Fine Aggregate – Portland Cement Concrete, Underdrain, and Pneumatic Mortar: concrete, underdrain, pneumatic mortar (natural or manufactured sand, note d)
% passing: 3/8 in 100 · No. 4 95-100 · No. 16 45-85 · No. 50 5-30 · No. 100 0-10
Sec. 901.01, Table 901 A, pp. 924-925

Fine Aggregate/Sand – Mortar and Epoxies: mortar and epoxies
% passing: No. 4 100 · No. 8 95-100 · No. 100 0-25 · No. 200 0-10
Sec. 901.01, Table 901 A, pp. 924-925
Good to know: Maryland's spec has its own “crusher run” (CR-6), with a note that it isn't for the structural part of state highway (SHA) projects; the base-course material is graded aggregate (Sec. 501).

Sources: MDOT SHA 2026 Standard Specifications (PDF)

MassachusettsPartly confirmed

Spec checked: MassDOT: Standard Specifications for Highways and Bridges, 2026 Edition (required for projects advertised on or after Feb. 21, 2026).
Dense-graded base: Dense Graded Crushed Stone for Sub-base: sub-base (Subsection 402)
Made from crusher-run coarse aggregate of crushed stone (trap only) plus fine aggregate, premixed with water.
% passing: 2 in 100 · 1 1/2 in 70-100 · 3/4 in 50-85 · No. 4 30-55 · No. 50 8-24 · No. 200 3-10
M2.01.7, Table M2.01.7-1, p. III.12

Processed Gravel for Subbase: gravel sub-base (Subsection 401)
Made from bank-run gravel processed mechanically; LA wear max 50.
% passing: 3 in 100 · 1 1/2 in 70-100 · 3/4 in 50-85 · No. 4 30-60 · No. 200 0-10
M1.03.1, Table M1.03.1-1, p. III.5

Gravel Borrow (Types a, b, c, d): Subsection 401 gravel sub-base allows Type a or b; also fill and shoulders
Made from hard durable stone and coarse sand, free from loam and clay.
% passing: 1/2 in 50-85 · No. 4 40-75 · No. 50 8-28 · No. 200 0-10
Max stone size by type: a 6 in, b 3 in, c 2 in, d 1.5 in.
M1.03.0, Table M1.03.0-1, p. III.4
No. 57 or nearest: None designated: MassDOT names crushed stone by nominal size (for example, 3/4 in. crushed stone), not by AASHTO number; no AASHTO size number appears in Division III
M2.01.0, Table M2.01.0-1, p. III.11
Big clean stone: 1 1/2 in. crushed stone: largest size in Table M2.01.0-1; MassDOT gives no AASHTO equivalent
M2.01.0, Table M2.01.0-1, p. III.11
Sand and screenings: Fine aggregate (AASHTO M 6): cement concrete; MassDOT adopts AASHTO M 6 instead of printing its own table
M4.01.2, Table M4.01.2-1, p. III.51

Stone Screenings: crusher fines: product from a stone crusher that completely passes a No. 4 sieve, with at least 40% passing a No. 8
% passing: No. 4 100 · No. 8 40 min
M2.05.0, p. III.15

Sand Borrow (Types a, b): sand fill; max particle size Type a 1/4 in, Type b 3/8 in; max 10% passing No. 200
M1.04.0
Also called: “Crusher run gravel”: the spec's own words for Processed Gravel for Subbase (M1.03.1).
Good to know: MassDOT names crushed stone by inch size, not AASHTO number. By nominal size, its nearest to No. 57 are 3/4 in. and 1 1/4 in. crushed stone, but we couldn't tie those sizes to their sieve limits, so we can't say how closely they match.

Sources: MassDOT construction specifications · MassDOT 2026 Standard Specifications, Division III (PDF) · MassDOT 2026 Edition notice

MichiganCurrent DOT spec

Spec checked: MDOT: 2020 Standard Specifications for Construction (newest edition; values match MDOT's errata-incorporated copy for August 2025 and later lettings).
Dense-graded base: 21AA: dense-graded aggregate for base course, surface course, shoulders, approaches, patching (21A has the same gradation)
Made from natural aggregate, iron blast-furnace slag, reverberatory furnace slag, or crushed concrete (crushed concrete banned within 100 ft of a water course or lake, and limited where base drains to underdrains).
% passing: 1½ inch 100 · 1 inch 85–100 · ½ inch 50–75 · No. 8 20–45 · loss by washing (No. 200) 4–8 (max 10 if made entirely by crushing, note d)
Sec. 902.05; Table 902-1, p. 9-13

22A: dense-graded aggregate for base course, shoulders, approaches (smaller top size)
Made from same materials as 21AA.
% passing: 1 inch 100 · ¾ inch 90–100 · ⅜ inch 65–85 · No. 8 30–50 · loss by washing (No. 200) 4–8 (max 10 if made entirely by crushing, note d)
Sec. 902.05; Table 902-1, p. 9-13
No. 57 or nearest: 6AA (nearest to No. 57; MDOT uses its own size series): coarse aggregate; 6A has the identical gradation
% passing: 1½ inch 100 · 1 inch 95–100 · ½ inch 30–60 · No. 4 0–8 · loss by washing (No. 200) ≤1.0
Closest match to No. 57, but it differs: ½ in 30–60 (vs 25–60), No. 4 0–8 (vs 0–10), and no No. 8 limit.
Sec. 902.03; Table 902-1, p. 9-13
Big clean stone: None recorded in the spec tables we read.
Sand and screenings: 2NS: natural sand for concrete, mortar and grout
% passing: ⅜ inch 100 · No. 4 95–100 · No. 8 65–95 · No. 16 35–75 · No. 30 20–55 · No. 50 10–30 · No. 100 0–10 · loss by washing (No. 200) 0–3.0
Sec. 902.08; Table 902-4, p. 9-19

2SS: stone sand (sand manufactured from stone sources) for concrete and mortar; quarried limestone/dolomite stone sand not allowed where exposed to traffic (note e)
% passing: ⅜ inch 100 · No. 4 95–100 · No. 8 65–95 · No. 16 35–75 · No. 30 20–55 · No. 50 10–30 · No. 100 0–10 · loss by washing (No. 200) 0–4.0
Sec. 902.08; Table 902-4, p. 9-19
Good to know: MDOT uses its own size series instead of AASHTO numbers: 21AA, 21A and 22A are its dense-graded base, and 6AA is its nearest to No. 57.

Sources: MDOT 2020 Standard Specifications for Construction (PDF)

MinnesotaNot checked yet

Status: MnDOT's 2025 Standard Specifications (for most projects let on or after Oct. 22, 2025) are hosted where we couldn't open them, so Minnesota isn't checked yet. We'll add it after a manual check of the spec book.
Spec: MnDOT Standard Specifications page

Sources: MnDOT Standard Specifications page

New JerseyPartly confirmed

Spec checked: NJDOT: 2019 Standard Specifications for Road and Bridge Construction (updated PDF dated Feb. 12, 2026).
Dense-graded base: Dense-Graded Aggregate (DGA): aggregate base course (Sec. 302)
Made from broken stone, crushed gravel or blast furnace slag (90% with 1+ fractured face); RCA or up to 50% RAP blend allowed.
% passing: 1 1/2 in 100 · 3/4 in 55-90 · No. 4 25-50 · No. 50 5-20 · No. 200 3-10
Sec. 901.10.01, Table 901.10.01-1, p. 400
No. 57 or nearest: No. 57: broken stone or washed gravel (901.03); same as AASHTO No. 57
% passing: 1 1/2 in 100 · 1 in 95-100 · 1/2 in 25-60 · No. 4 0-10 · No. 8 0-5
Sec. 901.03, Table 901.03-1, p. 393
Big clean stone: No. 1 (3 1/2 in – 1 1/2 in)
Sec. 901.03, Table 901.03-1, p. 393

No. 2 (2 1/2 in – 1 1/2 in)
Sec. 901.03, Table 901.03-1, p. 393

No. 3 (2 in – 1 in)
Sec. 901.03, Table 901.03-1, p. 393

No. 4 (1 1/2 in – 3/4 in)
Sec. 901.03, Table 901.03-1, p. 393
Sand and screenings: Fine aggregate for concrete, mortar, and grout: concrete, mortar, grout
% passing: 3/8 in 100 · No. 4 95-100 · No. 8 80-100 · No. 16 50-85 · No. 30 25-65 · No. 50 10-30 · No. 100 1-10 · No. 200 0.0-3.4
Sec. 901.06.02, Table 901.06.02-1, p. 398
Good to know: NJDOT names its clean stone sizes by AASHTO number, with the nominal size printed beside each one.

Sources: NJDOT 2019 Standard Specifications, updated Feb. 12, 2026 (PDF)

New YorkNot checked yet

Status: NYSDOT's website doesn't allow automated reading, so we couldn't open its current Standard Specifications (coarse aggregate sizes in Section 703-02, subbase types in Section 733-04). We'll add New York after a manual check of the spec book.
Spec: NYSDOT Standard Specifications (US Customary)

Sources: NYSDOT Standard Specifications (US Customary)

North CarolinaCurrent DOT spec

Spec checked: NCDOT: Standard Specifications for Roads and Structures, January 2024.
Dense-graded base: ABC (Aggregate Base Course): aggregate base course
Made from crushed stone, crushed gravel, uncrushed gravel or other similar hard, durable material (Sec. 1010-1(A)).
% passing: 1 1/2 in 100 · 1 in 75-97 · 1/2 in 55-80 · No. 4 35-55 · No. 10 25-45 · No. 40 14-30 · No. 200 4-12
Sec. 1005, Table 1005-1, p. 10-28
No. 57 or nearest: No. 57: same as AASHTO No. 57; NCDOT also lists a 57M size
% passing: 1 1/2 in 100 · 1 in 95-100 · 1/2 in 25-60 · No. 4 0-10 · No. 8 0-5
Sec. 1005, Table 1005-1, p. 10-28
Big clean stone: No. 4: largest standard size in Table 1005-1 (no No. 1, 2 or 3 listed)
% passing: 2 in 100 · 1 1/2 in 90-100 · 1 in 20-55 · 3/4 in 0-15 · 3/8 in 0-5
Sec. 1005, Table 1005-1, p. 10-28
Sand and screenings: Std. Size 2S (fine aggregate): concrete, shotcrete, grout, subsurface drainage, blotting sand
% passing: 3/8 in 100 · No. 4 95-100 · No. 8 80-100 · No. 16 45-95 · No. 30 25-75 · No. 50 5-30 · No. 100 0-10 · No. 200 0-3
Sec. 1005, Table 1005-2, p. 10-29

Stone screenings: fine aggregate for asphalt pavements and surface treatments
% passing: No. 200 not more than 20% by weight
Sec. 1012-1(C)(2), p. 10-33
Good to know: No. 57's limit on material passing the No. 200 sieve is set by footnote A to Table 1005-1 (Subarticle 1005-4(A)): 1.0% at the quarry stockpile, 1.5% at the job site for concrete or surface treatment and 2.0% for asphalt plant mix. ABC's No. 200 value carries footnote B, a plasticity check on its fines (Subarticle 1005-4(B)).

Sources: NCDOT 2024 Standard Specifications (PDF)

Ohio2023 check pending

Spec checked: ODOT: 2023 Construction and Material Specifications (C&MS), which ODOT says are current and updated twice a year; its January 2026 supplemental (SS 800) revises nothing in Items 304 or 411 or Section 703. The 2023 book wouldn't open for us, so these names come from ODOT's 2013 C&MS online edition and a 2023 check is pending.
Dense-graded base: Item 304 aggregate: Item 304 Aggregate Base
703.17 (2013 C&MS)

Item 411 aggregate: materials for Items 410, 411 and 617
703.18 (2013 C&MS)
No. 57 or nearest: Size No. 57 (Table 703.01-1): named in 703.11 and 703.13 (“Size No. 57 or 67 from Table 703.01-1”)
We couldn't read Table 703.01-1 itself, so no gradation or AASHTO match is recorded.
703.01, Table 703.01-1 (2013 C&MS)
Big clean stone: Not recorded yet: we couldn’t read ODOT’s size table (Table 703.01-1).
Sand and screenings: Fine aggregate for portland cement concrete: concrete fine aggregate (concrete sand)
703.02 (2013 C&MS)
Good to know: We list names only for Ohio until the 2023 check is done.

Sources: ODOT Construction and Material Specifications · ODOT 2013 C&MS, Section 703

Pennsylvania2026 check pending

Spec checked: PennDOT: Publication 408/2020 (the Section 703 entries listed here are unchanged in Change No. 4, April 2022). The current edition is Pub 408/2026 (Change No. 1, Oct. 9, 2026); it wouldn't open for us, so a 2026 check is pending.
Dense-graded base: No. 2A: subbase (Sec. 350, per Table D)
Made from coarse aggregate crushed and prepared from stone, gravel or slag; recycled concrete also listed (Sec. 703.2(a)).
Sec. 703.2, Table C (No. 200 limit in Table D), pp. 703-7 and 703-8

Select Granular Material (2RC): select granular material
Made from durable bank or crushed gravel, stone or slag.
Sec. 703.3(b), p. 703-9
No. 57 or nearest: No. 57: listed in Table C under its AASHTO number
Sec. 703.2, Table C, p. 703-7
Big clean stone: No. 1
Sec. 703.2, Table C, p. 703-7

No. 3
Sec. 703.2, Table C, p. 703-7
Sand and screenings: Type A fine aggregate (cement concrete sand): cement concrete
Sec. 703.1, Table A, p. 703-2

Type C fine aggregate (mortar sand): mortar
Sec. 703.1, Table A, p. 703-2
Also called: Trade names listed by Penn State's Center for Dirt and Gravel Road Studies (not PennDOT spec names): “modified” for 2A; “2B” for No. 57; “3A” for No. 3; “ballast” or “#4s” for No. 1; “grit” or “screenings” for AASHTO No. 10.
Good to know: We list names only for Pennsylvania until the 2026 check is done. PennDOT's Table C lists the clean stone sizes by their AASHTO numbers.

Sources: PennDOT Publication 408/2020 (PDF) · Penn State Center for Dirt and Gravel Road Studies, DSA Handbook Appendix F · Penn State Center for Dirt and Gravel Road Studies, Aggregate 101

South CarolinaCurrent DOT spec

Spec checked: SCDOT: 2025 Standard Specifications for Highway Construction (in use from the January 2025 letting).
Dense-graded base: Graded Aggregate Base – Macadam Base Course: graded aggregate base course
Made from crushed stone, excluding marine limestone, filled and bound with screenings from a QPL 2 source (305.2.1).
% passing: 2 in 100 · 1 1/2 in 95-100 · 1 in 70-100 · 1/2 in 48-75 · No. 4 30-60 · No. 30 11-30 · No. 200 0-12
Sec. 305.2.6.1, p. 300-14

Graded Aggregate Base – Marine Limestone Base Course: graded aggregate base course
Made from limestone aggregate not meeting the classification of dolomitic limestone (305.2.2).
% passing: 2 in 100 · 1 1/2 in 95-100 · 1 in 70-100 · 1/2 in 50-85 · No. 4 30-60 · No. 30 17-38 · No. 200 0-20
Sec. 305.2.6.1, p. 300-14

Aggregate No. CR-14: maintenance stone (305.2.6.2 allows the CR-14 gradation as an alternative to 305.2.6.1)
% passing: 2 in 100 · 1 1/2 in 95-100 · 1 in 70-100 · 1/2 in 35-65 · No. 4 10-40
Appendix A-2; Sec. 305.2.6.2; p. A-2, p. 300-13
No. 57 or nearest: Aggregate No. 57: same as AASHTO No. 57; “Use Aggregate No. 56, No. 57, or No. 67 as coarse aggregate for Portland cement concrete” (701.2.10.3)
% passing: 1 1/2 in 100 · 1 in 95-100 · 1/2 in 25-60 · No. 4 0-10 · No. 8 0-5
Appendix A-2, p. A-2
Big clean stone: Aggregate No. 5: largest clean size in Appendix A-2 (no AASHTO No. 1-4 sizes listed); equals AASHTO No. 5
% passing: 1 1/2 in 100 · 1 in 90-100 · 3/4 in 20-55 · 1/2 in 0-10 · 3/8 in 0-5
Appendix A-2, p. A-2
Sand and screenings: FA-10: fine aggregate for portland cement concrete (701.2.9.8: FA-10 or FA-10M)
% passing: 3/8 in 100 · No. 4 96-100 · No. 8 75-100 · No. 16 55-98 · No. 30 25-75 · No. 50 5-30 · No. 100 0-9 · No. 200 0-3
Appendix A-3, p. A-3

FA-10M: fine aggregate for portland cement concrete
% passing: 3/8 in 100 · No. 4 95-100 · No. 8 75-100 · No. 16 45-95 · No. 30 25-75 · No. 50 8-35 · No. 100 0.5-20 · No. 200 0-10
Appendix A-3, p. A-3
Good to know: Recycled portland cement concrete base has the same gradation as macadam base in Sec. 305.2.6.1.

Sources: SCDOT 2025 Standard Specifications (PDF) · SCDOT PCDM-24

TennesseeCurrent DOT spec

Spec checked: TDOT: Standard Specifications for Road and Bridge Construction, April 1, 2026 (for new contracts from the May 8, 2026 letting).
Dense-graded base: Mineral Aggregate Base, Type A, Grading D: mineral aggregate base (Sec. 303.02: “For Type A base, use aggregate of Grading D.”)
Made from hard, durable particles or fragments of stone, slag, gravel, or chert, and other finely divided mineral matter (903.05).
% passing: 1 1/2 in 100 · 1 in 85-100 · 3/4 in 60-95 · 3/8 in 50-80 · No. 4 40-65 · No. 16 20-40 · No. 100 9-18
For gravel and chert bases containing clay, the No. 16 range is 20-43 and the No. 100 range is 7-18.
Sec. 903.05, Table 903.05-2, p. 916; Sec. 303.02, p. 222

Mineral Aggregate Base, Type B, Grading C: mineral aggregate base (303.02: Type B may use Grading C or D)
Made from crushed or uncrushed gravel, crushed or uncrushed chert, crushed stone or crushed slag (903.05).
% passing: 1 1/2 in 100 · 1 in 90-100 · 3/8 in 45-74 · No. 4 30-55 · No. 100 4-15
Sec. 903.05, Table 903.05-2, p. 916
No. 57 or nearest: Size No. 57: same as AASHTO No. 57; structural concrete and cement treated permeable base (Table 903.03-1)
% passing: 1 1/2 in 100 · 1 in 95-100 · 1/2 in 25-60 · No. 4 0-10 · No. 8 0-5
Sec. 903.22 (AASHTO M 43); row from TDOT's 2024 Aggregate Technician Course manual
Big clean stone: Size No. 1
% passing: 4 in 100 · 3 1/2 in 90-100 · 2 1/2 in 25-60 · 1 1/2 in 0-15 · 3/4 in 0-5
Sec. 903.22; TDOT manual

Size No. 2
% passing: 3 in 100 · 2 1/2 in 90-100 · 2 in 35-70 · 1 1/2 in 0-15 · 3/4 in 0-5
Sec. 903.22; TDOT manual

Size No. 3
% passing: 2 1/2 in 100 · 2 in 90-100 · 1 1/2 in 35-70 · 1 in 0-15 · 1/2 in 0-5
Sec. 903.22; TDOT manual

Size No. 4
% passing: 2 in 100 · 1 1/2 in 90-100 · 1 in 20-55 · 3/4 in 0-15 · 3/8 in 0-5
Sec. 903.22; TDOT manual
Sand and screenings: Fine Aggregate for Concrete: portland cement concrete (AASHTO M 6 with TDOT exceptions)
% passing: 3/8 in 100 · No. 4 95-100 · No. 16 50-90 · No. 50 5-35 · No. 100 0-20 · No. 200 0-3
Sec. 903.01, Table 903.01-2, p. 910

Size No. 10 limestone screenings: mineral aggregate for hot-mix base and leveling and surface courses (903.06.C, 903.11.C); named only
Sec. 903.06.C; 903.11.C
Good to know: Section 903.22 adopts AASHTO M 43 for coarse aggregate sizes. The spec's size table is an image, so the No. 57 and Nos. 1 to 4 rows come from TDOT's own Aggregate Technician Course manual.

Sources: TDOT April 1, 2026 Standard Specifications (PDF) · TDOT 2026 specifications memo · TDOT Aggregate Technician Course manual

VirginiaFrom VDOT study guides

Spec checked: VDOT: 2020 Road and Bridge Specifications. VDOT's website blocks automated reading, so these rows come from VDOT certification study guides that reproduce the spec tables.
Dense-graded base: Size No. 21A: subbase / aggregate base
Made from dense-graded aggregate.
Numbers left off: two VDOT study guides print different limits for the No. 10 sieve.
Sec. 208, Table II-9 “Design Range for Dense Graded Aggregates” (as reproduced in VDOT study guides)

Size No. 21B: subbase / aggregate base
Made from dense-graded aggregate.
% passing: 2 in 100 · 1 in 85-95 · 3/8 in 50-69 · No. 10 20-36 · No. 40 9-19 · No. 200 4-7
Sec. 208, Table II-9 (as reproduced in VDOT study guide Table 1.3, Ch. 1, p. 6)
No. 57 or nearest: Size No. 57: same as AASHTO No. 57
% passing: 1 1/2 in Min. 100 · 1 in 95-100 · 1/2 in 25-60 · No. 4 Max. 10 · No. 8 Max. 5
Sec. 203, Table II-3 “Sizes of Open-Graded Coarse Aggregates” (as reproduced in VDOT Central Mix Aggregate study guide, App. C)
Big clean stone: Size No. 1
Sec. 203, Table II-3

Size No. 2
Sec. 203, Table II-3

Size No. 3
Sec. 203, Table II-3
Sand and screenings: Fine Aggregate Grading A: fine aggregate (sand)
% passing: 3/8 in Min. 100 · No. 4 95-100 · No. 8 80-100 · No. 16 50-85 · No. 30 25-60 · No. 50 5-30 · No. 100 Max. 10
Sec. 202.02, Table II-1 (as reproduced in VDOT Central Mix Aggregate study guide)
Also called: “Crusher run” is a separate VDOT material (Sec. 205.03, Sizes 24, 25 and 26), not 21A or 21B.
Good to know: We haven't opened the spec book itself, so check Virginia's current spec before you rely on a number here.

Sources: VDOT 2020 Road and Bridge Specifications (PDF) · VDOT Soils and Aggregate Compaction study guide (2024) · VDOT Central Mix Aggregate study guide (2021)

West VirginiaPartly confirmed

Spec checked: WVDOH: Standard Specifications, Roads and Bridges, 2023 Edition, with the 2026 Supplemental Specifications.
Dense-graded base: Class 1: base or subbase aggregate (class shown on the Plans, Sec. 307.2)
Made from gravel, crushed gravel, crushed stone or crushed slag, or a blend (gravel must be crushed for unstabilized base).
% passing: 1 1/2 in 100 · 3/4 in 50-90 · No. 4 20-50 · No. 40 5-20 · No. 200 0-7.0
Sec. 704.6, Table 704.6.2A, p. 784

Class 2: base or subbase aggregate (class shown on the Plans, Sec. 307.2)
Made from gravel, crushed gravel, crushed stone or crushed slag, or a blend (gravel must be crushed for unstabilized base).
% passing: 1 1/2 in 100 · 3/4 in 80-100 · No. 4 35-75 · No. 40 10-30 · No. 200 0-10.0
Sec. 704.6, Table 704.6.2A, p. 784
No. 57 or nearest: No. 57: Table 703.4, “Standard Sizes of Coarse Aggregates (AASHTO M 43)”
% passing: 1 1/2 in 100 · 1 in 95 to 100 · 1/2 in 25 to 60 · No. 4 0 to 10 · No. 8 0 to 5
Sec. 703.4, Table 703.4, p. 782
Big clean stone: No. 1 (nominal 3 1/2 to 1 1/2 in.)
Sec. 703.4, Table 703.4, p. 782

No. 2 (nominal 2 1/2 to 1 1/2 in.)
Sec. 703.4, Table 703.4, p. 782

No. 3 (nominal 2 to 1 in.)
Sec. 703.4, Table 703.4, p. 782
Sand and screenings: Fine aggregate, alternate grading: fine aggregate (Sec. 702.6 “Alternate Grading”)
% passing: 3/8 in 100 · No. 4 95-100 · No. 16 45-80 · No. 50 10-30 · No. 100 2-10
Sec. 702.6, p. 777

No. 10 (screenings): screenings, nominal No. 4 to 0
Sec. 703.4, Table 703.4, footnote (2), p. 782
Also called: “Crusher run”: Table 704.6.2A marks Class 10 as “Crusher Run Material Only.” We haven't mapped Class 10.
Good to know: The Class 1, Class 2 and No. 57 rows were tied to their sieves with WVDOH's own Aggregate Technician manual, which prints the same limits sieve by sieve.

Sources: WVDOH 2023 Standard Specifications (PDF) · WVDOH Aggregate Technician Instruction Manual (2024)

WisconsinCurrent DOT spec

Spec checked: WisDOT: 2025 Standard Specifications for Highway and Structure Construction (from the November 2024 letting), with ASP-6 (November 2026 letting).
Dense-graded base: 3/4-inch dense-graded base: dense-graded base (Sec. 305)
Made from crushed stone, crushed gravel, crushed concrete, reclaimed asphalt, reprocessed or blended material per 301.2 (305.2.1).
% passing: 1 in 100 · 3/4 in 95-100 · 3/8 in 50-90 · No. 4 35-70 · No. 10 15-55 · No. 40 10-35 · No. 200 5.0-15.0
No. 200 is 8.0-15.0 if the base is 50% or more crushed gravel.
Sec. 305.2.2.1, p. 123

1 1/4-inch dense-graded base: dense-graded base (Sec. 305)
Made from same as 3/4-inch (301.2).
% passing: 1 1/4 in 95-100 · 3/4 in 70-93 · 3/8 in 42-80 · No. 4 25-63 · No. 10 16-48 · No. 40 8-28 · No. 200 2.0-12.0
No. 200 is 4.0-10.0 if the base is 50% or more crushed gravel, and 8.0 max for base between old and new pavement.
Sec. 305.2.2.1, p. 123

3-inch dense-graded base: dense-graded base (Sec. 305); may substitute for pit run (313.2(5))
Made from same as 3/4-inch (301.2).
% passing: 3 in 90-100 · 1 1/2 in 60-85 · 3/4 in 40-65 · No. 4 15-40 · No. 10 10-30 · No. 40 5-20 · No. 200 2.0-12.0
Sec. 305.2.2.1, p. 123

Select crushed material: subbase rock (Sec. 312); not clean stone
Made from crushed stone or crushed concrete.
% passing: 5 in 90-100 · 1 1/2 in 20-50 · No. 10 0-10
Sec. 312.2(4), p. 129

Breaker run: subbase rock (Sec. 311); not clean stone
Made from stone or concrete run through a primary crusher, predominantly 6 inches or less in at least one dimension, not further screened or crushed; no sieve gradation.
Sec. 311.2, p. 128
No. 57 or nearest: AASHTO No. 67 (nearest; WisDOT defines no No. 57): may substitute for open-graded base if it meets the 301.2.4.5 fracture requirements (ASP-6 310.2(2))
% passing: 1 in 100 · 3/4 in 90-100 · 3/8 in 20-55 · No. 4 0-10 · No. 8 0-5
Smaller than No. 57: all of it passes 1 in.
Sec. 310.2(2), Table 310-01 as replaced by ASP-6; 2025 book p. 126
Big clean stone: AASHTO No. 4 coarse aggregate (slope paving crushed aggregate): slope paving; also cited for rock bags (628.2.13)
% passing: 2 in 100 · 1 1/2 in 90-100 · 1 in 20-55 · 3/4 in 0-15 · 3/8 in 0-5 · No. 200 ≤1.5
Sec. 604.2(3), Table 604-01, p. 345
Sand and screenings: Fine aggregate (concrete): portland cement concrete (Sec. 501); no stand-alone gradation: fine and coarse aggregate must together meet the combined limits of Table 501-4
Sec. 501.2.7.2; 501.2.7.4.2, Table 501-4, pp. 199-201
Good to know: WisDOT defines no No. 57. Select crushed material and breaker run are big subbase rock, not clean stone.

Sources: WisDOT Standard Specifications page · WisDOT Sec. 305 (PDF) · WisDOT ASP-6 (PDF) · WisDOT Sec. 604 (PDF)

Frequently Asked Questions

What is 2A gravel called in other states?

2A is Pennsylvania's name (PennDOT No. 2A) for its dense-graded base. The closest counterparts in the other states we've checked are DGA in New Jersey and Kentucky, Graded Aggregate Base Course (GABC) in Delaware, graded aggregate for base course in Maryland, Class 1 or Class 2 in West Virginia, Item 304 in Ohio, 21A or 21B in Virginia, ABC in North Carolina, 21AA in Michigan, CA 6 or CA 10 in Illinois, No. 53 in Indiana, Mineral Aggregate Base in Tennessee, Graded Aggregate Group I or II in Georgia, Graded Aggregate Base in South Carolina, Dense Graded Crushed Stone for Sub-base in Massachusetts, Processed Aggregate Base in Connecticut and dense-graded base in Wisconsin. They're the same kind of material, but each state sets its own gradation, so they aren't identical mixes.

Is No. 57 stone the same in every state?

Where a state uses AASHTO No. 57, the limits are the same: 100% passing 1 1/2 in., 95 to 100% passing 1 in., 25 to 60% passing 1/2 in., 0 to 10% passing the No. 4 sieve and 0 to 5% passing the No. 8. We found those limits for Maryland, New Jersey, West Virginia, North Carolina, Kentucky, Georgia and South Carolina in their specs, and for Virginia and Tennessee in DOT training material that reproduces the spec. Delaware's size 57 adds one more limit. Michigan (6AA), Illinois (CA 7 or CA 11), Connecticut and Wisconsin (No. 67 is closest) and Massachusetts (crushed stone named by inch size) list no No. 57.

What is crusher run called in my state?

It depends, because “crusher run” means different things in different specs. Maryland has a Crusher Run Aggregate CR-6 and says not to use it in the structural part of its projects. Virginia's “crusher run” is its own material (Sizes 24, 25 and 26), separate from 21A and 21B. West Virginia's base table marks Class 10 as crusher run material, Connecticut's subbase includes Crusher-Run Stone (Grading A), and Massachusetts calls its Processed Gravel for Subbase “crusher run gravel.” Kentucky's aggregate sections don't use the term. Outside the specs, a quarry or yard may sell its own product under that name, so ask your supplier for the gradation sheet.

Why do states use different names for the same gravel?

Each state's department of transportation writes its own standard specifications for road work. Many adopt the AASHTO M 43 numbered sizes for clean stone, which is why No. 57 or No. 4 means the same thing in most of those states, but dense-graded base, subbase and sand are named and graded state by state.

What does “percent passing” mean on a gradation?

It's the share of a sample, by weight, that falls through a sieve of that size. “1 in 95-100” means 95 to 100 percent passes a 1-inch sieve. Clean stone like No. 57 has almost nothing passing the small sieves, while dense-graded base keeps a set amount of fines (material passing the No. 200 sieve) so it packs into a hard layer.

What gravel goes under a patio or driveway?

A compacted dense-graded base: 2A in Pennsylvania, and the names in the table above elsewhere. Our crews put 6 inches of compacted 2A modified under patios, more on clay or wet ground. Clean stone like No. 57 is for drainage: behind walls and around drain pipe.

Planning information, not a survey or engineering. Call 811 and check with your local office. These names come from state highway specifications. A quarry or supply yard may sell its own products under these names or others, so ask for the product’s gradation sheet before you order.

More state guides: Frost line depth · 811 dig laws · Retaining wall permits · Contractor licensing · Contractor deposit limits · Building codes · Planting zones · Mechanics lien deadlines · Workers' comp · Frost dates · Drainage laws · Noxious weed laws · Rainfall and snowfall · Landscaper pay · Landscaping sales tax · Pesticide applicator licenses · All state guides · Free calculators

Last checked November 11, 2026 against state DOT standard specifications and, where an entry says so, DOT training manuals and study guides. Entries marked “Partly confirmed” include rows we could name but not tie to their sieve limits; the Pennsylvania, Ohio, Virginia, Delaware and Georgia badges explain the limits of those entries, and New York and Minnesota aren’t checked yet. Specs change; your state DOT has the final word. Spot something out of date? Email info@muthlerlandscaping.com and we’ll fix it.

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In central PA? We order, place and compact 2A and 2B for bases, drains and wall backfill in Lock Haven, Williamsport and State College. Talk to our crew.

Using this guide? Link to it or cite it. It’s free to use with a link back, and we keep it updated against official sources.

<a href="https://muthlerlandscaping.com/state-guides/gravel-names-by-state/">Gravel Names by State: What Your DOT Calls 2A, No. 57 and Crusher Run</a> (Muthler Landscaping & Construction)

Cite as: Muthler Landscaping & Construction, “Gravel Names by State: What Your DOT Calls 2A, No. 57 and Crusher Run,” https://muthlerlandscaping.com/state-guides/gravel-names-by-state/ (last checked November 11, 2026).

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