Stockpile, Earthworks & Volume Quantity Tracking

Description

drone footage and fixed camera recordings used to visually estimate and verify earthworks volumes, stockpile quantities, and cut-and-fill progress.

Trigger

Subcontractor/haulier submits payment application claiming earthworks volumes/stockpile quantities the main contractor's QS cannot independently verify.

Activity

Using drone-captured photogrammetric surveys and/or fixed camera recordings to independently measure/estimate earthworks volumes and stockpile quantities.

Conclusion

Quantity dispute resolved — subcontractor's claimed volumes verified and paid, or drone/camera evidence demonstrates discrepancy and payment adjusted.

Role detail

drone footage and fixed camera recordings used to visually estimate and verify earthworks volumes, stockpile quantities, and cut-and-fill progress.

Steps (10)

1. 1Earthworks/haulage subcontractor submits payment application claiming volume or load count.
2. 2Main contractor's QS reviews and identifies discrepancy with site records.
3. 3Drone survey commissioned over earthworks area/stockpile.
4. 4Drone imagery processed into 3D point cloud and surface model.
5. 5Processed data used to calculate volumes and compare against claimed quantities.
6. 6Where drone not available, fixed camera recordings reviewed for earthworks activity timeline.
7. 7Drone volumetric data and/or camera evidence presented to subcontractor.
8. 8Parties negotiate settlement based on objective survey data.
9. 9Agreed volumes recorded and payment application adjusted/certified.
10. 10Drone survey data and camera records archived as definitive measurement record.

Evidence (3)

• “The main contractor's QS used drone footage to challenge a haulage subcontractor's claim for earthworks removal — the drone survey of the stockpile at month end showed approximately 30% less material than the claimed volume implied, leading to a £120k reduction in the certified payment.”

  Anonymized evidence record 37.1

• “A cut-and-fill earthworks subcontractor on a highways project disputed the QS's measurement of the completed earthworks. A drone photogrammetric survey was commissioned and the resulting volume calculation, compared against the original ground model, resolved the dispute in favour of the QS's position.”

  Anonymized evidence record 37.2

• “Fixed the evidence system cameras overlooking a materials compound were used to cross-reference a stockpile delivery claim — the camera footage showed the number of lorry movements during the claimed delivery period did not match the delivery tickets submitted, providing grounds for a payment reduction.”

  Anonymized evidence record 37.3

ROI model — Template E

Evercam provides visual evidence that resolves or prevents disputes with subcontractors, suppliers, and clients. Saving from faster resolution, avoided escalation, and prevented overcharges.

saving = (disputes_avoided_pct × disputes_per_year × avg_resolution_cost) + (overcharges_prevented_per_year × avg_overcharge_value)

Notes

Key distinction from general invoice disputes: earthworks quantities require spatial measurement. Drone surveys are point-in-time snapshots, not continuous.

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