Temporary Controls AHA (Activity Hazard Analysis / Job Hazard Analysis)
Updated 2026-06-23
A Temporary Controls AHA (Activity Hazard Analysis / Job Hazard Analysis) is the plan that keeps a project's temporary protective controls sound in their adequacy as protection functions, coordinated across the multiple controls, and maintained and monitored over time. Temporary controls establish and manage the full set of temporary environmental and protective controls on a project — combining the control-adequacy-as-a-protection- function hazard, the multi-control-coordination hazard, and the maintenance-and-monitoring hazard. This guide walks through building a Temporary Controls AHA that names the control-adequacy, multi-control-coordination, and maintenance-and-monitoring hazards and assigns the adequacy, coordination, and maintenance controls that hold up in the field.
Why temporary controls needs its own AHA
Temporary controls establish, coordinate, and manage the full set of temporary environmental and protective controls on a construction project — the barriers, enclosures, dust and air controls, noise controls, erosion and sediment controls, traffic controls, security controls, and other temporary protective measures that together protect workers, the public, the environment, and the work during construction. The defining feature is that this is the overarching, coordinating activity for all the temporary protective controls, so the concerns are the adequacy of the controls (each control performing its protective function), the coordination among them (the controls working together without conflict), and their maintenance and monitoring over the life of the project. The hazards combine the control-adequacy-as-a-protection-function (each temporary control is a protective measure — the overarching concern is that the controls are adequate and perform their protective functions (an inadequate control fails to protect what it was meant to protect)), the multi-control-coordination (a project has many temporary controls that must work together — poor coordination creates gaps, conflicts (e.g., a barrier blocking egress, a control undermining another), and unprotected hazards), the maintenance-and-monitoring (temporary controls must be maintained and monitored over the project life — controls degrade, get damaged, or are removed/bypassed, failing over time if not maintained), and the implementation. The control-adequacy-as-a-protection-function and the multi-control-coordination justify a dedicated AHA.
Breaking temporary controls into steps
The steps for a Temporary Controls AHA follow the controls program:
- Identify the required temporary controls for the project hazards
- Ensure each control is adequate for its protective function
- Coordinate the controls to work together without conflict
- Implement the controls
- Monitor the controls' performance
- Maintain the controls over the project life
- Manage the adequacy, coordination, and maintenance concerns
- Remove controls as hazards are resolved
Each step carries a concern, and the control-adequacy, the multi-control-coordination, and the maintenance-and-monitoring are where the most significant risks concentrate.
The hazards step by step
Control-adequacy-as-a-protection-function
Each temporary control is a protective measure — the overarching concern is that the controls are adequate and perform their protective functions (an inadequate control fails to protect what it was meant to protect). The controls are ensuring each temporary control is adequate for its protective purpose (matched to the hazard it addresses, correctly specified and installed), verifying each control performs its function, and the adequacy controls. The control-adequacy-as-a-protection-function is the defining concern — controls exist to protect, and must actually do so. (These follow the protective-control fundamentals.)
Multi-control-coordination
A project has many temporary controls that must work together — poor coordination creates gaps, conflicts (e.g., a barrier blocking egress, a control undermining another), and unprotected hazards. The controls are coordinating the temporary controls (so they work together, cover all hazards without gaps, and do not conflict — a dust barrier that does not block egress, a traffic control that works with the site security), reviewing the controls as a system, and the coordination controls. The multi-control-coordination is a defining concern — the controls must work together as a system. (These follow the systems-coordination fundamentals.)
Maintenance-and-monitoring
Temporary controls must be maintained and monitored over the project life — controls degrade, get damaged, or are removed/bypassed, failing over time if not maintained. The controls are monitoring the controls' performance over time (inspections, environmental monitoring where applicable), maintaining and repairing the controls (damage, degradation), preventing unauthorized removal/bypass, updating controls as conditions change, and the maintenance/monitoring controls. The maintenance-and-monitoring is a defining concern — controls fail over time if not maintained. (These follow the control-maintenance fundamentals.)
Implementation
The implementation (installing the controls, the physical hazards of doing so) carries the implementation hazard. The controls are safe implementation of each control (per its specific activity/AHA), and the implementation controls. (These follow the specific-control fundamentals.)
A simple Temporary Controls AHA structure
| Step | Concern | Control | Standard |
|---|---|---|---|
| Identify controls | Unaddressed hazard | Identify required controls for project hazards | project |
| Ensure adequacy | Protection failure | Each control adequate for its protective function | project |
| Coordinate | Gaps / conflicts | Coordinate controls to work together | project |
| Implement | Installation | Safe implementation per each control's activity | project |
| Monitor | Degradation | Monitor controls' performance over time | project |
| Maintain | Control failure | Maintain/repair, prevent removal/bypass | project |
Control adequacy and multi-control coordination
A Temporary Controls AHA centers on control adequacy and multi-control coordination. The control adequacy addresses each control performing its protective function — controlled by ensuring each temporary control is adequate for its protective purpose (matched to the hazard, correctly specified and installed) and verifying each performs. The multi-control coordination addresses the controls working together — controlled by coordinating the controls (covering all hazards without gaps, not conflicting) and reviewing them as a system. And the controls' performance over time gets maintenance and monitoring. An AHA built on control adequacy and multi-control coordination, with maintenance/monitoring, addresses the concerns that define temporary controls.
From the field: what actually goes wrong
In fourteen years across federal, heavy civil, and industrial projects, temporary controls as an overarching activity is about making sure the whole set of temporary protective measures on a project actually works — that each control is adequate, that they work together, and that they keep working over time. The control-adequacy- as-a-protection-function is the defining concern, and it is the thread running through this entire cluster of temporary-control AHAs: every temporary control (a dust barrier, an air barrier, a noise barrier, a traffic control, a security barrier, a protective walkway, an erosion control) exists to perform a protective function, so the overarching concern is that each one is adequate and actually performs that function — an inadequate control fails to protect what it was meant to protect. So ensuring each temporary control is adequate for its protective purpose (matched to the hazard it addresses, correctly specified and installed) and verifying each control performs its function are the controls. The recurring theme across all these AHAs — that the control is a protective function whose adequacy is a safety issue — is exactly what this overarching activity manages.
The multi-control-coordination and the maintenance-and-monitoring are the other defining concerns. On the projects I have run, a project has many temporary controls in place at once, and they must work together as a system — poor coordination creates gaps (a hazard nothing covers), conflicts (a control undermining another, or the classic case of a barrier or enclosure blocking egress), and unprotected hazards. So coordinating the temporary controls so they cover all the hazards without gaps and do not conflict with each other, and reviewing the controls as a system, are the controls. This coordination is where the individual AHAs in this cluster come together — the dust barrier must not block egress, the traffic control must work with the site security, and so on. The maintenance-and-monitoring concern is that temporary controls degrade, get damaged, or are removed or bypassed over the project life, so they fail over time if not maintained — controlled by monitoring the controls' performance (inspections, environmental monitoring where applicable), maintaining and repairing them, preventing unauthorized removal or bypass, and updating them as conditions change. A control that was adequate when installed but has since been damaged, degraded, or bypassed is no longer protecting anyone. This doc closes the temporary-controls cluster by tying the individual controls into a managed system. The AHA built on control adequacy and multi-control coordination is the one that makes the whole set of temporary controls actually protect the project.
The bottom line
A Temporary Controls AHA names the control-adequacy-as-a-protection-function, the multi-control-coordination, and the maintenance-and-monitoring concerns with specific controls — ensuring each temporary control is adequate for and performs its protective function, coordinating the controls to work together without gaps or conflicts (a barrier that does not block egress), and monitoring and maintaining the controls over the project life so they do not fail over time. The control adequacy and the multi-control coordination are the defining concerns. The AHA that manages both is the one that makes the temporary controls actually protect the project.
Frequently asked questions
Why is control adequacy the overarching concern?
Every temporary control (dust barrier, air barrier, noise barrier, traffic control, security barrier, protective walkway, erosion control) exists to perform a protective function, so the overarching concern is that each one is adequate and actually performs that function — an inadequate control fails to protect what it was meant to protect. Controls are ensuring each temporary control is adequate for its protective purpose (matched to the hazard, correctly specified and installed), verifying each control performs its function, and the adequacy controls.
Why does multi-control coordination matter?
A project has many temporary controls in place at once that must work together as a system — poor coordination creates gaps (a hazard nothing covers), conflicts (a control undermining another, or a barrier blocking egress), and unprotected hazards. Controls are coordinating the temporary controls (so they cover all hazards without gaps and do not conflict — a dust barrier that does not block egress, a traffic control that works with site security), reviewing the controls as a system, and the coordination controls.
Why is maintenance and monitoring a defining concern?
Temporary controls degrade, get damaged, or are removed/bypassed over the project life, so they fail over time if not maintained — a control that was adequate when installed but has since been damaged, degraded, or bypassed is no longer protecting anyone. Controls are monitoring the controls' performance over time (inspections, environmental monitoring where applicable), maintaining and repairing the controls, preventing unauthorized removal/bypass, updating controls as conditions change, and the maintenance/monitoring controls.
What are temporary controls?
Temporary controls establish, coordinate, and manage the full set of temporary environmental and protective controls on a construction project — the barriers, enclosures, dust and air controls, noise controls, erosion and sediment controls, traffic controls, security controls, and other temporary protective measures that together protect workers, the public, the environment, and the work. Because it is the overarching activity coordinating all these protective controls, the control-adequacy, multi-control-coordination, and maintenance/monitoring concerns apply.
Related AHAs and JHAs
- Temporary Barriers and Enclosures AHA — a specific set of temporary controls
- Temporary Dust Barriers AHA — a specific temporary control
- Traffic Control AHA — a specific temporary control
- Temporary Environmental Monitoring JHA — monitoring the controls
Written by Mustafa Tok, CSP, ASP, CHST — OSHA Authorized Outreach Trainer with 14+ years of international construction safety experience across federal, heavy civil, and industrial projects.