Understanding Hazard Analysis Documentation for Construction Projects

Ask three people on a jobsite the difference between an AHA, a JHA, and a JSA, and you’ll often get three different answers. The terms get used interchangeably, but on federal and military construction projects, the distinction matters, especially when USACE contracting officers are the ones reviewing your paperwork.

Here’s what each document actually is, when you need one, and what separates a hazard analysis that holds up from one that just checks a box.

What Is an Activity Hazard Analysis (AHA)?

An Activity Hazard Analysis (AHA) is the hazard analysis format required specifically on U.S. Army Corps of Engineers projects under EM 385-1-1. It breaks a specific work activity, like excavation, concrete placement, or crane operations, into individual steps, identifies the hazards in each step, and lists the controls that will be used to eliminate or reduce them.

AHAs are not generic. USACE expects one for each definable feature of work, and it must be reviewed and accepted before that work begins on site. A single project can require dozens of AHAs covering everything from site mobilization to final demobilization.

What Is a Job Hazard Analysis (JHA)?

A Job Hazard Analysis (JHA) is the OSHA-recognized term for essentially the same process: breaking a job into steps, identifying hazards at each step, and defining controls. JHA is the more common term in general industry and private-sector construction, while AHA is the term USACE contracts specifically require.

In practice, if your project is a federal USACE contract, you’ll be asked for an AHA. If you’re working private commercial construction, your safety program may call the same document a JHA.

What Is a Job Safety Analysis (JSA)?

A Job Safety Analysis (JSA) is another name for the same underlying process, favored in certain industries like oil and gas or manufacturing. Functionally, JSA, JHA, and AHA follow the same core method, steps, hazards, controls, but the naming convention depends on which industry or contract you’re working under.

So Which One Do You Actually Need?

For federal and military construction, the answer is straightforward: if EM 385-1-1 applies to your project, you need an AHA, in the format and level of detail USACE expects. Calling it a JHA or JSA on a federal submission isn’t just a naming issue, it can signal to reviewers that your team isn’t familiar with the contract requirements.

For private commercial work, JHA or JSA is usually acceptable, but it still needs to reflect the actual hazards of the specific task and site, not a generic template pulled from a previous job.

What Makes a Hazard Analysis Actually Defensible

Whether you’re filling out an AHA, JHA, or JSA, the documents that hold up under review, or after an incident, share a few things in common:

• Steps are specific to the actual sequence of work being performed, not a generic outline
• Hazards are tied to real site conditions (weather, terrain, adjacent operations, equipment on site)
• Controls are actionable, not just “use caution” or “follow OSHA standards”
• The document is reviewed and signed off by someone with the authority to enforce it in the field
• It’s updated when site conditions or scope of work changes, not filed away and forgotten

A hazard analysis that was clearly copied from another project is one of the fastest ways to draw scrutiny, whether that scrutiny comes from a USACE reviewer before mobilization or an OSHA investigator after an incident.

Building a Hazard Analysis: The Basic Steps

1. Break the activity into its sequential steps, from setup to completion.
2. Identify the hazards present at each individual step, not just for the activity as a whole.
3. Define specific controls for each hazard, engineering controls first, then administrative, then PPE.
4. Review the draft with the crew who will actually perform the work.
5. Get sign-off from your SSHO or safety lead, and from the contracting officer’s representative if the project requires it.

The Bottom Line

AHA, JHA, and JSA all follow the same core logic, but the term you use, and the level of detail expected, depends on the contract you’re working under. On federal and military projects, getting this right from the start saves time in pre-construction review and gives your crews documentation that actually reflects the hazards they’re facing.

EA & Associates develops project-specific AHAs and hazard analysis documentation built to hold up under USACE and OSHA scrutiny, not boilerplate paperwork.

Need hazard analysis documentation for your next project? Contact EA & Associates to get started.