The 31,000 Bridges With Submerged Substructures
Need to know which bridges require underwater inspection? Cheryl explains 23 CFR 650.311, qualified team leaders, and extending intervals to 72 months.
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Level I, II and III Underwater Bridge Inspection: What Each One Buys
What does each level of underwater bridge inspection buy? A state DOT engineer explains the data, cost, and compliance.
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A Diver Can Be Pinned by Water That Is Not Even Moving Fast
Static head pressure, not fast water, is the real danger. Learn how to map, isolate, and escape underwater pinning points.
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Ships Are Inspected Underwater Instead of Being Pulled Out
A marine surveyor explains how ships get inspected underwater instead of drydocking, and the real limits of a UWILD—written from real portside experience.
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There Are 31,000 US Bridges With Feet Underwater
A state DOT team leader explains what 23 CFR 650.311 requires, how divers actually inspect submerged bridges, and why 31,000 structures need it.
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Diving Near Live Intakes: Lockout, Tagout and Isolation
Why static head is the killer on power plant intakes, and how positive isolation with LOTO keeps divers alive.
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Clean Water Act 316(b): Intake Screens and the Diver's Role
How commercial divers keep intake screens compliant under Clean Water Act 316(b), with impingement standards, entrainment, and delta P safety.
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Differential Pressure: The Hazard That Kills Divers
Delta p is the static head that pins divers to intakes and grates. Learn how to identify it, avoid it, and isolate it in commercial diving.
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Scour Critical Bridges: What the Rating Means for Inspection Frequency
Learn what a scour critical bridge rating means for underwater inspection intervals under 23 CFR 650.311, including 60 vs. 72-month rules.
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FERC Part 12 Dam Safety Inspections: The Diver's Role
The diver's role in FERC Part 12 underwater inspections: field essentials, safety hazards, and coordination with the plant.
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NFPA 25 Fire Water Tank Inspection: The Rule Facility Managers Miss
Stop relying on the annual walk-around. NFPA 25 requires a complete internal fire water tank inspection every 5 years. Learn what to check.
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EM 385-1-1: The Corps of Engineers Dive Safety Manual
Understand EM 385-1-1 and the diving safety requirements for USACE projects. A working diver's plain-spoken breakdown.
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