Job-Site Safety and OSHA Requirements for Field Surveying

Why Safety Comes First on a Survey Site

Surveying takes you out of the classroom and into traffic, construction zones, steep terrain, and excavations. The Occupational Safety and Health Administration (OSHA) sets legally binding requirements that protect you and your crew. Understanding those requirements is not optional—it is part of being a competent survey technician and is tested through the OSHA 10-hour General Industry course you will complete in this lesson.

OSHA organizes workplace hazards into categories. Four categories appear most often in field surveying: struck-by hazards, electrical hazards, fall hazards, and excavation hazards. Knowing what each category means—and what controls reduce the risk—lets you build a safe work plan before you pick up a rod or total station.

Struck-By Hazards

A struck-by event occurs when a moving object contacts a worker with enough force to cause injury. On survey sites the most common sources are vehicles, construction equipment, and flying debris from mowing or grading operations.

The primary control for roadway surveying is temporary traffic control (TTC) set up according to the Manual on Uniform Traffic Control Devices (MUTCD). The MUTCD specifies sign placement distances, taper lengths, and cone spacing based on posted speed limits. As a survey technician you may not set up the full TTC layout yourself, but you must confirm it is in place and correct before your crew enters the work zone.

Personal protective equipment (PPE) reinforces engineering controls. ANSI/ISEA 107 is the standard that governs high-visibility apparel. For most roadway survey work, a Class II high-visibility vest is the minimum—it uses both fluorescent background material and retroreflective striping so drivers see you in daylight and at night. Class III provides greater coverage and is required where speeds or hazard exposure are higher. Always check your employer's or project owner's specification; some highway agencies require Class III at all times on active roadways.

Electrical Hazards

Total stations, data collectors, and RTK GNSS receivers contain batteries and electronics. Working near overhead power lines or underground utilities adds shock and electrocution risk.

Before any field session:

• Call 811 (the national dig-safe number) so underground utilities are marked.
• Identify overhead line locations on your site sketch.
• Maintain the minimum approach distance required by OSHA for unqualified workers—treat all lines as energized unless the utility owner has confirmed de-energization in writing.
• Never raise a range pole, tripod leg, or prism pole directly under an overhead line without confirming safe clearance.

Metallic tripods and aluminum rod sections are excellent conductors. If a thunderstorm approaches, stop work, lower all poles and tripods, and move to a hard-sided shelter or vehicle.

Fall Hazards

Surveyors work on slopes, embankments, bridge decks, and around open excavations. OSHA requires fall protection when workers are exposed to falls of certain heights; specific thresholds depend on whether general industry or construction standards apply to your site. Know which standard governs your project before you begin.

Practical controls include:

• Inspecting terrain before setting instrument stations.
• Staying back from slope edges; do not position the instrument directly at an unprotected edge.
• Using a buddy system so no one works alone near drop-offs.
• Wearing footwear with ankle support and slip-resistant soles on uneven ground.

Excavation Hazards

Surveyors frequently shoot elevation shots inside or near trenches and excavations. OSHA excavation rules (29 CFR Part 1926, Subpart P) require a competent person to classify soil and specify protective measures such as sloping, shoring, or trench boxes before any worker enters an excavation deeper than a regulated threshold. As a survey technician you are usually not the competent person, but you must:

• Never enter an unprotected excavation.
• Confirm that a competent person has inspected the excavation before you measure inside it.
• Keep equipment and spoil piles back from the edge to reduce surcharge loading.

The Job Hazard Analysis (JHA)

A Job Hazard Analysis is a written document that lists each task in a job, the hazards associated with that task, and the controls that reduce risk to an acceptable level. It is your pre-job safety plan.

A complete JHA for a road-centerline survey includes:

1. Task list — approach to site, set up TTC, occupy traverse points, pick up shots, break down and leave.

2. Hazard column — for each task, identify hazards (e.g., vehicle traffic while setting cones, pinch points while handling equipment).

3. Controls column — PPE required, procedures, safe distances, emergency contacts.

4. Emergency action steps — location of nearest hospital, who calls 911, first-aid kit location, muster point.

The JHA is reviewed by a supervisor before work begins and updated whenever site conditions change.

PPE Donning Procedure

Before every field session in this course you will don the following items in this order:

1. Safety glasses — protect eyes from dust, debris, and flying particles.

2. Hard hat — protects the skull from falling objects and overhead impact; inspect for cracks before each use.

3. Class II ANSI/ISEA 107 high-visibility vest — makes you visible to equipment operators and drivers.

Each item addresses a specific hazard category. Being unable to explain why you are wearing each piece means you do not yet understand the hazard it controls—and that gap in knowledge can cost a life.