Rip Rap Aggregates
Common Sizes
Common Sizes 4" and Larger; Rip Rap Sizes and Designations Vary by State
Rip rap aggregates are large, durable stones used for erosion control, shoreline protection, and stormwater management. Produced at Martin Marietta facilities, our rip rap meets project-specific size and weight requirements with designations that vary by state and application.
Designations
Small
Medium
Heavy
Very Heavy
Armor Stone
Why Rip Rap Aggregates
Rip rap aggregates are selected when erosion control, slope stabilization, and long-term durability under hydraulic forces are essential to project success.
Compared to finer materials, rip rap aggregates provide superior resistance to water flow, wave action, and soil displacement across a wide range of civil and environmental applications. Their large, angular mass dissipates energy and anchors in place, protecting shorelines, embankments, and drainage channels under sustained hydraulic stress.
Common Applications
Rip rap aggregates are commonly used in:
- Shoreline & Bank Protection
- Slope & Embankment Stabilization
- Stormwater Channel Lining
- Bridge Scour Protection
- Retaining Wall Drainage
- Detention Pond Armoring
- Culvert Inlet & Outlet Protection
- Coastal Erosion Control
- Streambank Restoration
(Availability and applications may vary by location.)
Find Rip Rap Aggregates Near You
Key Characteristics
While specifications differ by facility and application, rip rap aggregates typically offer:
- Large, angular stone sizing for maximum hydraulic resistance
- High mass and density to withstand water flow and wave impact
- Durable, weather-resistant material for long-term erosion protection
- Flexible placement adaptable to slopes, banks, and channel configurations
For project-specific requirements, availability, or guidance, connecting with a local facility is recommended.
Product Calculator
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Rip Rap Designations by State
| State | DOT Terminology | Class/Type Framework | Typical Size per Class (Weight) |
|---|---|---|---|
| Alabama | Riprap | Class 1-5 | Classes 1: 10-100lb · 2: 10-200lb · 3: 25-500lb · 4: 50-1000lb · 5: 100-2000lb |
| Arizona | Riprap | Grouted, Wire-Tied, Dumped, Gabions, Riprap (Slope Mattress), Rail Bank Protection | Grouted: Dictated by Project Plans · Wire-Tied: Dictated by Wire Mesh Dimension · Dumped: Dictated by Project Plans · Gabions: 4-8in · Riprap (Slope Mattress): Dictated by Project Plans · Rail Bank Protection: 4-12in |
| Arkansas | Riprap | Dumped Riprap · Foundation Protection Riprap · Dumped Riprap (Grouted) | Dumped: 18in max., approx. 35lb or more · Foundation Protection · 35-300lb · Dumped (Grouted): 12-24in |
| Bahamas | Riprap | Drainage Ditches and Culvert Aprons · Road Embankments and Channels · Shoreline Revetments · High-energy Coastal/Hurricane Zones | Drainage Ditches and Culvert Aprons: 10-18in · Road Embankments and Channels: 18-24in · Shoreline Revetments: 24-36in · High-energy Coastal/Hurricane Zones: >36in |
| California | Rock Slope Protection (RSP) | Class I-XI | Classes I: 6in · II: 9in · III: 12in · IV: 15in · V: 18in · VI: 21in · VII: 24in · VIII: 30in · IX: 36in · X: 42in · XI: 46in (Nominal RSP classes by median particle diameter) |
| Colorado | Riprap | Riprap 6, 9, 12, 18, and 24 | Riprap 6: 6in · Riprap 9: 9in · Riprap 12: 12in · Riprap 18: 18in · Riprap 24: 24in (D50 = nominal stone size) |
| Florida | Rubble (Broken Stone) | Rubble (Bank & Shore Protection), Rubble (Ditch Lining), Bedding Stone | Rubble (Bank & Shore Protection): 60-670lb · Rubble (Ditch Lining): 4-75lb · Bedding Stone: 1-12in · Gabion Rock: 3-5in · 4-8in |
| Georgia | Riprap | Type 1, Type 3 | Type 1: 125-700lb · Type 3: 15-165lb · Stream Riprap Types A-E: A - No. 4-12in · B - 2-4ft³ · C - 4-8ft³ · D - 12-18ft³ · E - 24-72ft³ |
| Indiana | Riprap | Uniform B & A, Revetment, Class 1-2 | Uniform B: 1-6in · Uniform A: 1-8in · Revetment: 3-18in · Class 1: 3-24in · Class 2: 3-30in |
| Iowa | Stone | Revetment Stone Type A-E, Erosion Stone, Gabion Stone | Revetment Stone: Type A - 50-75lb · B - 25-650lb · C - 75-450lb · D - 5-250lb · E - 5-250lb · Erosion Stone: 3-9in · Gabion Stone: 4-8in |
| Kansas | Stone for Riprap | Heavy Series Class, Light Series Class, Stone for Ditch Lining | Heavy Series Classes: 8 Ton - 4-8tn · 4 Ton - 2-4tn · 2 Ton - 1-2tn · 1 Ton - 1/2-1tn · 1/2 Ton - 1/4-1/2tn · 1/4 Ton - 1/4tn · Light Series Classes: Facing 5-75lb · 24 Inch 5-200lb · 18 Inch 5-100lb |
| Kansas (Continued) | Stone for Aggregate Ditch Lining | Size 1-6 | Size 1 - 1/2-2in · Size 2 - 1-4in · Size 3 - 1-1/2in-6in · Size 4 - 2-8in · Size 5 - 2-1/2in-10in · Size 6 - 3-12in |
| Kentucky | Riprap & Channel Lining | Cyclopean Stone Riprap, Channel Lining Class III | Cyclopean Stone Rip Rap: 8-16in · Channel Lining Class III: 8-16in |
| Louisiana | Riprap | Classes 2, 10, 30, 55, 130, 250, 440, 1000lb | Classes 2lb: 0.75-10lb · 10lb: 5-50lb · 30lb: 10-140lb · 55lb: 20-275lb · 130lb: 40-650lb · 250lb: 80-1250lb · 440lb: 130-2200lb · 1000lb: 300-5000lb |
| Maryland | Riprap | Class 0-III, Stone for Channels & Ditches, Stone for Gabions | Classes 0: 1-33lb · I: 2-150lb · II: 20-700lb · III: 40-2000lb · Channels & Ditches: Class I Riprap · Gabion: 3-6in · Gabion 4-7in · Gabion 4-12in |
| Minnesota | Riprap | Class I-V, Hand-placed Riprap, Gabions and Revet Mattresses | Classes I: 1-6in · II: 3-12in · III: 6-18in · IV: 8-24in · V: 9-30in · Hand-placed: ≥50lb · Gabion: 4-8in · Revet Mattress: 3-6in |
| Missouri | Riprap | Class 1-3 | Classes 1: 50-150lb · Class 2: 150-500lb · Class 3: 500-1500lb |
| Nebraska | Rock Riprap | Type A-C, Gabions, Revet Mattresses | Types A: 2-150lb · B: 5-300lb · C: 10-700lb · Gabion: 4-8in · Revet Mattress: 3-6in |
| North Carolina | Riprap | Class A, B, 1, 2 | Classes A: 2-6in · Class B: 5-12in · Class 1: 5-17in · Class 2: 9-23in |
| Nova Scotia | Riprap | Loose Laid Riprap, Hand Laid Rip Rap, Armour Rock R1, Armour Rock R2 | Loose Laid Riprap and Hand Laid Riprap: Field or quarry stone of approved size shall be used · Armour Rock R1: 33-1,050mm · Armour Rock R2: 230-850mm |
| Ohio | Dumped Rock Fill & Rock Channel Protection | Types A-D | Types A: 18-30in · B: 12-24in · C: 6-18in · D: 3-12in |
| Oklahoma | Riprap | Types I, II, III, IV | Type I 12in thickness: 20-150lb · Type I 18in thickness: 30-300lb · Type I 24in thickness: 40-1000lb · Type I 30in thickness: 40-1000lb · Type I 36in thickness · Type II: 0.25-12ft³ · Type III 12in thickness: 50-250lb · Type III 18in thickness: 50-250lb · Type IV (Grouted): 50-250lb |
| Pennsylvania | Rock | Class R-3 through R-8 | Classes R-3: 2-6in · R-4: 3-12in · R-5: 4-18in · R-6: 6-24in · R-7: 12-30in · R-8: 15-42in |
| South Carolina | Riprap | Class A-F | Classes A: 2-9in · B: 5-16in · C: 5-22in · D: 11-27in · E: 22-34in · F: 27-43in |
| Tennessee | Riprap | Class A-1, Class A-2, Class A-3, Class B, Class C | Class A-1 and A-2: 2-15in · Class A-3: 2-6in · Class B: 3-27in · Class C: 5-36in |
| Utah | Riprap | No class or type designations. Only one size of Riprap listed in the specifications. | 12-20in |
| Virginia | Riprap | Dry Riprap: Class I, II, III, AI · Dumped Riprap: Type I, II · Erosion Control | Dry Riprap: Type 1 50-150lb · Type II 150-500lb · Type III 500-1,500lb · Type AI 25-75lb · Dumped Riprap: Type I 3/4-2 tons · Type II 3-10 tons · Erosion Control 15in |
| Washington | Riprap | Heavy Loose Riprap, Light Loose Riprap, Rock for Erosion & Scour Protection Class A-D | Heavy Loose Riprap: 50-2000lb · Light Loose Riprap: 50-1200lb · Rock for Erosion & Scour Protection: Class A 4-18in · Class B 10-30in · Class C 14-42in · Class D 20-54in |
| West Virginia | Riprap | Class R-1, R-2, R-3, R-4 | Class R-1: 50-150lb · Class R-2: 150-500lb · Class R-3: 500-1500lb · Class R-4: >1500lb |
| Wyoming | Riprap | Class I-VIII | Classes I: 3-12in · II 5-18in · III 7-24in · IV 9-30in · V 11-36in · VI 13-42in · VII 14-48in · VIII 18-60in |
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