Danger Storm Drain / Culvert Sign – Confined Space Hazard, Do Not Enter, 8x12 Rust-Resistant Aluminum Safety Sign by CGAP Safety

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.

Use this sign to support your confined space entry controls and to reduce unauthorized entry into stormwater assets such as culverts, drainage runs, and access points where hazardous atmospheres, entrapment, sudden water, and other life-safety risks may exist. It’s a straightforward, high-impact piece of hazard communication that helps keep routine inspections and maintenance from becoming incident response.

This 8 x 12 inch sign is manufactured from rust-resistant aluminum for long-term outdoor use in wet environments and repeated exposure to humidity, rain, and splash zones. The rigid build outlasts temporary notices and lightweight materials that fail right when you need them.

Important: This sign is a warning device and does not replace confined-space training, testing, rescue planning, permits (when required), or site-specific safety procedures.

CGAP Safety is an American safety sign manufacturer dedicated to durable, practical signage that helps teams see the gap and close the gap in real-world safety performance.

• 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.
• MADE BY CGAP SAFETY, AN AMERICAN SAFETY MANUFACTURER – CGAP Safety is an American safety sign manufacturer focused on durable materials and clear, compliance-minded messaging that helps organizations close the gap between policy and field reality.