Related by context. Frequent words. (Click for all words.) 57 fatigue cracks 55 corrosion 52 hairline cracks 51 welds 51 leaks 50 concrete piers 48 corroded 48 structural defects 47 delamination 47 leak 46 structural deficiencies 46 leaky 46 valve stems 45 structural integrity 45 bulkheads 45 unseaworthy 44 roadbed 44 seepage 44 Big Dig tunnels 44 sinkholes 44 defective drywall 44 pilings 43 girders 43 ship hull 43 asbestos contamination 43 defects 43 ruptures 43 faulty 42 NASSCO 42 groundwater contamination 42 gusset plates 42 rupture 42 cracks 42 ruptured pipe 42 contamination 42 rotting wood 42 leaking 42 shoaling 42 pinholes 41 sinkhole 41 structurally unsound 41 shoddy workmanship 41 sticky pedals 41 structurally unsafe 41 defective 41 trusses 41 electronic throttle 41 steel trusses 41 repairs 41 hull 40 gussets 40 faulty valve 40 undercarriages 40 perchlorate contamination 40 structural soundness 40 Modern Continental 40 Davis Besse 40 General Accountability Office 40 bridge pilings 40 Big Dig highway 40 rusting 40 cofferdam 40 blowout preventer 40 levees 39 willful violations 39 pipes 39 unintended acceleration 39 grouting 39 subsidence 39 bulkhead 39 horizontal stabilizer 39 Folsom Dam 39 weld 39 sewer pipes 39 pipework 39 culverts 39 seaworthy 39 MRGO 39 asbestos 39 salmonella contamination 39 underground piping 39 structurally sound 39 steel reinforcement 39 Devil Slide 38 Line 6B 38 dry rot 38 contaminants 38 malfunctioning 38 structural 38 sunken vessel 38 piers 38 repaired 38 faults 38 electrical wiring 38 dredging 38 leaky roofs 38 mine subsidence 38 inspections 38 inspection 38 Caltrans 38 rivets