Dredging Excavators for Sale
Dredging excavators are purpose-configured machines used to remove silt, sediment, sludge and debris from rivers, canals, lakes, retention ponds, harbours and wetlands. Unlike standard earthmoving units, dredging machines prioritise extended reach, greater dig depth and low ground pressure so they can work safely along soft, saturated banks and submerged material. Whether you are maintaining irrigation channels, restoring a reservoir, clearing a marina, or handling municipal waterway upkeep, the machines below are selected and rated for dredging and sediment-removal applications. Each listing shows verified operating weight, engine power, maximum dig depth, bucket capacity and working hours so you can match the right unit to your water depth and reach requirements.| Used Excavator Image | Excavator Title | Excavator Brand | Excavator Class | Operating Weight | Engine Model & Net Power | Max Dig Depth | Bucket Capacity | Transport Dimensions: Length, Width, Height | Applications | Working Hours | Production Year | Price | Compare |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Used Komatsu PC350 Excavator | Komatsu | Medium | 27 T | Komatsu SAA6D114E 246 HP | 7.3 m | 1.4 m³ | 11.1 x 3.1 x 3.2 m | Dredging – River & Canal Dredging Agriculture – Large Animal Burial Service Forestry – Large Animal Burial Service | 2200 H | 2020 | $43,000 | |
 | Used CAT329D Excavator | Caterpillar | Medium | 29 T | CAT C7 204 HP | 7.1 m | 1.5 m³ | 10.4 x 3.1 x 3.2 m | Dredging – River & Canal Dredging Agriculture – Large Animal Burial Service Forestry – Large Animal Burial Service | 2000 H | 2020 | $58,000 | |
 | Used Volvo EC290B Excavator | Volvo | Medium | 29 T | Diesel Engine 218 HP | 8.2 m | 1.31 m³ | 10.5 x 3.1 x 3.2 m | Dredging – River & Canal Dredging Agriculture – Large Animal Burial Service Forestry – Large Animal Burial Service | 2000 H | 2019 | $50,000 | |
 | Used Sany SY265C Excavator | Sany | Medium | 27 T | Diesel Engine 199 HP | 7.9 m | 1.19 m³ | 10.5 x 3.1 x 3.2 m | Dredging – River & Canal Dredging Agriculture – Large Animal Burial Service Forestry – Large Animal Burial Service | 700 H | 2021 | $43,000 | |
 | Used Hyundai 275LVS Excavator | Hyundai | Medium | 27.5 T | Diesel Engine 150 HP | 6.9 m | 0.9 m³ | 9.5 x 2.8 x 3.0 m | Dredging – River & Canal Dredging Agriculture – Large Animal Burial Service Forestry – Large Animal Burial Service | 1800 H | 2019 | $54,000 | |
 | Used Hitachi ZX270 Excavators | Hitachi | Medium | 27 T | Diesel Engine 203 HP | 7.9 m | 1.22 m³ | 10.5 x 3.1 x 3.2 m | Dredging – River & Canal Dredging Agriculture – Large Animal Burial Service Forestry – Large Animal Burial Service | 2500 H | 2020 | $40,000 | |
 | Used Komatsu PC270-7 Excavator | Komatsu | Medium | 27 T | Diesel Engine 203 HP | 7.9 m | 1.22 m³ | 10.5 x 3.1 x 3.2 m | Dredging – River & Canal Dredging Agriculture – Large Animal Burial Service Forestry – Large Animal Burial Service | 2200 H | 2020 | $43,000 |
How to Choose the Right Dredging Excavator
The correct machine depends on three factors: required reach, water/sludge depth, and the load-bearing capacity of the bank you operate from. Use the guide below to shortlist the configuration that fits your worksite.
Dredging Excavator Configurations Compared
| Configuration | Best For | Typical Reach / Dig Depth | Key Advantage |
|---|---|---|---|
| Long-Reach Boom | Canals, riverbanks, ponds worked from shore | Up to 15–18 m reach | Removes sediment without machine entering water |
| Amphibious / Pontoon | Deep wetlands, marshes, soft mud | Floats & digs in-situ | Works where ground cannot support tracks |
| Standard Crawler + Wide Pads | Firm banks, retention ponds, marinas | 6–8 m dig depth | Lower cost, faster cycle times |
Match Machine Size to Your Job
| Excavator Class | Operating Weight | Ideal Dredging Task |
|---|---|---|
| Compact / Mini | Under 10 T | Small ponds, drainage ditches, tight urban canals |
| Medium | 20–30 T | Municipal canals, irrigation channels, marina upkeep |
| Large | 30 T and above | Rivers, reservoirs, harbours, large-scale desilting |
Key Features That Matter for Dredging
- Maximum Dig Depth — must exceed your deepest sediment point; always allow a margin for reach at full extension.
- Low Ground Pressure — wide track pads spread weight across soft, saturated banks and reduce sink-in.
- Sealed & Protected Components — cylinders, pins and undercarriage must resist water and abrasive silt.
- Bucket Type — perforated or ditching buckets drain water and hold sludge for cleaner, faster cycles.
- Stability & Counterweight — long-reach booms require balanced machines to work safely at full extension.
Recommended Bucket & Attachment Options
| Attachment | Function in Dredging |
|---|---|
| Ditching / Mud Bucket | Wide, smooth-edge bucket for grading channel bottoms and moving soft silt |
| Perforated Dredging Bucket | Drains water on lift, retains solids, reduces spill and cycle weight |
| Long-Reach Boom & Arm | Extends working radius to reach mid-channel from the bank |
| Weed / Rake Bucket | Clears vegetation, roots and floating debris from waterways |
Buying a Used Dredging Excavator — Inspection Checklist
- Undercarriage & tracks: check for corrosion, seal wear and pad damage from wet operation.
- Cylinder rods: inspect for pitting or rust caused by prolonged water exposure.
- Hydraulic system: confirm no water ingress in oil and no leaks at long-reach joints.
- Working hours vs. year: lower hours on a recent machine indicate stronger residual value.
- Boom pins & bushings: long-reach configurations wear faster — verify play and lubrication.
Frequently Asked Questions
What is the best excavator for dredging?
For most canal and pond work, a medium-to-large long-reach excavator (20–35 T) offers the best balance of dig depth, stability and cost. For deep marsh or soft-mud sites, choose an amphibious pontoon excavator.
How deep can a dredging excavator dig?
Standard machines reach roughly 6–8 m, while long-reach configurations can dig 12–18 m below the operating surface depending on model and boom length.
Can a normal excavator be used for dredging?
Yes, when fitted with wide track pads, a suitable dredging bucket, and sealed components. However, purpose-built long-reach or amphibious units are safer and more efficient for continuous underwater work.
Are used dredging excavators worth buying?
Absolutely — a well-maintained used unit with verified hours delivers most of the productivity at a significantly lower price. Focus on undercarriage condition and cylinder integrity, which see the most wear in wet applications.
Ready to Start Dredging?
Browse the verified machines above, compare specifications side by side using the Compare button, and request a quote on any unit that matches your reach and depth requirements. Our team can advise on the right boom length, bucket type and machine class for your specific waterway project.