concrete bed
121Trickling filter — A trickling filter consists of a fixed bed of rocks, gravel, slag, polyurethane foam, sphagnum peat moss, or plastic media over which sewage or other wastewater flows downward and causes a layer or film of microbial slime to grow, covering the… …
122Naval Health Clinic Charleston — Naval Health Clinic Charleston, located in the City of North Charleston, South Carolina …
123Silicon — Not to be confused with the silicon containing synthetic polymer silicone. aluminium ← silicon → phosphorus C ↑ Si ↓ Ge …
124John F. Kennedy International Airport — For the regional airport in Wisconsin, see John F. Kennedy Memorial Airport. John F. Kennedy International Airport USGS aerial image as of April 8, 1994 IATA: JFK – ICAO: KJFK – …
125Lock (water transport) — Canal lock and lock keeper s cottage on the Aylesbury Arm of the Grand Union Canal at Marsworth in Hertfordshire, England …
126River Don, South Yorkshire — River Don The River Don as it flows past Hillsborough Stadium. Origin Pennines …
127Hungerford Bridge — Infobox Bridge bridge name = Hungerford Bridge caption = Hungerford Bridge and Golden Jubilee Bridges, seen from the north official name = locale = London, England carries = Railway crosses = River Thames maint = open = 1864 below = traffic =… …
128St. Francis Dam — The St. Francis Dam was a concrete gravity arch dam, designed to create a reservoir as part of the Los Angeles Aqueduct. The dam was located 40 miles (64 km) northwest of Los Angeles, California, near the present city of Santa Clarita. The dam… …
