DANGER Storm Drain / Culvert Sign – Confined Space Hazard – 8x12 Aluminum

People treat a storm drain or culvert like it’s just a hole in the ground until it turns into an emergency. Confined spaces are operationally unforgiving: air quality can be unsafe, surfaces can be slick, access can be restricted, and water conditions can change without warning. That’s why “DO NOT ENTER” is not a suggestion, it’s a control.

The CGAP Safety “DANGER – Storm Drain / Culvert – Confined Space Hazard – Do Not Enter” sign is designed to communicate high-severity risk quickly and consistently at the point of access. The bold DANGER header and large-format wording create immediate recognition for workers, contractors, and the public, especially in roadside and right-of-way environments where distractions and time pressure drive bad decisions.

Why buyers choose this sign

• DANGER: STORM DRAIN / CULVERT – High-visibility warning for storm drains, culverts, and drainage structures where confined space conditions can create immediate life-safety risk. Clear “DO NOT ENTER” directive supports controlled access and hazard communication.
• CONFINED SPACE HAZARD CONTROL – Storm drains and culverts can present oxygen-deficient or contaminated atmospheres, unexpected water flow, slippery surfaces, and entrapment risk. This sign is a simple, field-ready control to reduce unauthorized entry and prevent incidents.
• BUILT FOR MUNICIPAL + CONSTRUCTION USE – Ideal for public works, DOT/right-of-way, site utilities, stormwater maintenance, and construction staging where drainage assets are accessible to workers and the public. Helps standardize messaging across locations and crews.
• 8x12 RUST-RESISTANT ALUMINUM – Manufactured from rust-resistant aluminum for long-term outdoor performance in wet, high-humidity environments. Rigid construction holds up better than thin plastic notices that warp, fade, or crack.
• FAST RECOGNITION AT A DISTANCE – Bold DANGER header and large black text drive quick readability in roadside conditions, low light, and high-traffic areas where missed signage becomes a liability event.