1. “A Simple Method of Risk/Hazard Assessment in Dredging”
Thomas M. Verna
and
Dr. Luis. A. Prieto-Portar
October 23, 2012

2. Process Hazard Analysis (PHA)
PHAs:
Risk Assessment Tool
Defines the Activity or Work to be Performed
Identifies Hazards
Establishes Controls to Reduce the Hazard to an Acceptable Risk Level
Living Document
Changes with Site Conditions or Operations
Changes of competent/qualified personnel

3. for USACE, EM 385-1-1, 01.A.13.a states:
Activity Hazard Analysis shall define the activities being performed and identify the work sequences, the specific anticipated hazards, site conditions, equipment, materials, and the control measures to be implemented to eliminate or reduce each hazard to an acceptable level.
15 Sep 2008 3

4. Process Hazard Analysis (PHA) Development
1. Define features of work
2. Identify hazards for each feature
3. Establish controls
4. Identify the competent/qualified personnel
5. Risk assessment (probability/severity)
6. Equipment, Training & Inspection

5. 5

6. The Dredging Risk Matrix

7. Risk Factors
Probability: How many times that risk event can occur, or likelihood of the hazard to cause a incident, near miss, or accident
Severity: The impact upon the project, or outcome/degree of the incident, near miss, or accident 7

8. Risk Assessment Code (RAC)
Probability: Occasional
Risk Assessment Code (RAC)
Moderate Risk (M)
Identify (M) as RAC for the hazard on AHA
Repeat RAC process for each hazard
Severity: Marginal M

9. Risk Mitigation 9 Unacceptable; must be reduced. Red
Yellow
Reduce if feasible; proceed with caution.
Green
Proceed and keep monitoring.
Risk Mitigation 9

10. Conclusion
Dredging and marine construction work is inherently dangerous
PHAs are a risk management tool to help identify hazards or risks and formulate controls to reduce the hazard to an acceptable risk level
Communicate at all levels
PHAs shall be reviewed and modified as work progresses
The Risk Matrix is a simple, visual method used by all to reduce risk
Safety requires a TEAM EFFORT!

11. Questions ? Comments ! Contacts:
Thomas M. Verna, USACE Institute for Water Resources, Alexandria, VA
p: ,
Dr. Luis. A. Prieto-Portar, Piedroba Marine Construction, Miami, FL
p: ,