The Cray Reservoir project was initiated by the Swansea Corporation, in response to increasing water demand from its area; it was completed in 1907. The reservoir is situated in a glaciated valley in the Brecon Beacons at the head of the River Cray and the dam is 28 m high impounding 4,850,000 m3 of water at a TWL of 331 m ASL. Nothing!HAHAHAHAHA! ... Swansea (Welsh: Abertawe, mouth of the Tawe) is a city and county in South Wales, situated on the coast immediately to the east of the Gower peninsula. ... 1907 was a common year starting on Tuesday (see link for calendar). ... A glaciated valley is one formed by the process of glaciation. ... Part of the Brecon Beacons National Park, looking from the highest point Pen y Fan, 886 m (2907 feet), to Corn Du, 873 m (2864 feet) The Brecon Beacons National Park is one of three national parks in Wales. ... The confluence of the River Darent (left) and the River Cray (right) on Crayford Marshes. ... Scrivener Dam, Canberra Australia, was engineered to withstand a once-in-5000-years flood event A dam is a barrier across flowing water that obstructs, directs or retards the flow, often creating a reservoir, lake or impoundment. ... The term above mean sea level (AMSL) refers to the elevation (on the ground) or altitude (in the air) of any object, relative to the average sea level. ...

The location of the site held several attractions; not only was it high enough to gravitate water to the higher properties in the Swansea Corporation's area, but also it was situated in an area of high rainfall where the catchment was largely undisturbed and a reliable water quality was thus ensured.

Because of the high quality of the impounded water, sophisticated treatment has been unnecessary. Disinfection and simple screening have been the only forms of treatment, and these are carried out at the Nant‑yr‑Wydd gauge basin immediately prior to entry to the mains system. It is proposed that lime treatment is shortly to commence to reduce the plumbosolvent character of the water. Disinfection is the destruction of pathogenic and other kinds of microorganisms by physical or chemical means. ...

Owing to the undisturbed nature of the catchment the quality of water supplied from Cray, for most of its history, has been better than that now demanded by the EEC Drinking Water Directive, although occasional periods of dirty water have been experienced after long spells of hot weather, when stratification of the low reservoir has produced elevated soluble manganese concentrations in the water. Possible meanings: Energy Efficiency Centre Energy Efficiency in Construction Engineering Education Centre Eurocontrol Experimental Centre European Community European Egg Consortium This page concerning a three-letter acronym or abbreviation is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... Jump to: navigation, search General Name, Symbol, Number manganese, Mn, 25 Chemical series transition metals Group, Period, Block 7, 4, d Appearance silvery metallic Atomic mass 54. ...