50:
234:
31:
246:
57:
222:
Despite the generally excellent quality of the water, there have been occasional episodes of impaired quality mostly concerned with forestry planting and the release of difficult to treat turbidity into the reservoir. On occasions when such raw water quality impairment has overwhelmed the treatment
270:
334:
92:
294:
201:
and is estimated to impound some 1,007,000,000 gallons of water. The structure is believed to have been made from over 10 million bricks.
49:
339:
160:
219:. The treatment of screening, disinfection and lime dosing is carried out south of the reservoir at Nant yr Wydd.
215:
forestry. The impounded water quality is good and the water requires only minimal treatment before entering the
233:
329:
189:
The reservoir is one of several established in what is now the Brecon
Beacons National Park, an area of
245:
324:
205:
216:
295:
Water Supply and
Forestry, a conflict of Interests - Cray Reservoir - a case study - C Stretton
190:
198:
30:
227:
deterioration has been experienced in the downstream water supply system such as in 1981.
164:
136:
318:
124:
309:
168:
176:
183:
36:
107:
94:
224:
156:
129:
208:
194:
310:
www.geograph.co.uk : photos of Cray
Reservoir and surrounding area
212:
172:
182:
The reservoir now supplies water to the towns in the valley of the
78:
179:
and was built between 1898 and 1908 by
Swansea Corporation.
211:
or unimproved grassland with one area now given over to
135:
123:
84:
74:
23:
85:
204:Upstream of Crai Reservoir the land is largely
335:Reservoirs in the Brecon Beacons National Park
8:
20:
197:. The 28-metre high dam is within a wide
35:Looking north-east from a lay-by on the
262:
229:
56:
7:
14:
244:
232:
55:
48:
29:
1:
73:
163:(named after the village of
161:Brecon Beacons National Park
193:peaks with relatively high
356:
43:
28:
108:51.88056°N 3.62500°W
340:Reservoirs in Powys
217:water supply system
186:and north Swansea.
104: /
113:51.88056; -3.62500
18:Reservoir in Wales
223:facilities, some
191:Old Red Sandstone
146:
145:
347:
297:
292:
286:
285:
283:
281:
275:
271:"Wales: climate"
267:
248:
236:
199:glaciated valley
119:
118:
116:
115:
114:
109:
105:
102:
101:
100:
97:
87:
59:
58:
52:
33:
21:
355:
354:
350:
349:
348:
346:
345:
344:
315:
314:
306:
301:
300:
293:
289:
279:
277:
273:
269:
268:
264:
259:
252:
251:Face of the dam
249:
240:
237:
225:bacteriological
171:to the city of
159:located in the
155:) is a storage
151:(also known as
139: countries
112:
110:
106:
103:
98:
95:
93:
91:
90:
70:
69:
68:
67:
66:
65:
64:
60:
39:
19:
12:
11:
5:
353:
351:
343:
342:
337:
332:
327:
317:
316:
313:
312:
305:
304:External links
302:
299:
298:
287:
261:
260:
258:
255:
254:
253:
250:
243:
241:
238:
231:
153:Cray Reservoir
149:Crai Reservoir
144:
143:
142:United Kingdom
140:
133:
132:
127:
121:
120:
88:
82:
81:
76:
72:
71:
63:Crai Reservoir
62:
61:
54:
53:
47:
46:
45:
44:
41:
40:
34:
26:
25:
24:Crai Reservoir
17:
13:
10:
9:
6:
4:
3:
2:
352:
341:
338:
336:
333:
331:
328:
326:
323:
322:
320:
311:
308:
307:
303:
296:
291:
288:
272:
266:
263:
256:
247:
242:
235:
230:
228:
226:
220:
218:
214:
210:
207:
202:
200:
196:
192:
187:
185:
180:
178:
174:
170:
166:
162:
158:
154:
150:
141:
138:
134:
131:
128:
126:
122:
117:
89:
83:
80:
77:
51:
42:
38:
32:
27:
22:
16:
330:Fforest Fawr
290:
278:. Retrieved
276:. Met Office
265:
221:
203:
188:
181:
169:water supply
152:
148:
147:
15:
325:Cray, Powys
177:South Wales
111: /
86:Coordinates
319:Categories
257:References
213:coniferous
184:River Tawe
167:) for the
96:51°52′50″N
209:moorlands
157:reservoir
130:Reservoir
99:3°37′30″W
195:rainfall
75:Location
280:21 June
173:Swansea
239:Plaque
206:upland
274:(PDF)
137:Basin
79:Wales
37:A4067
282:2020
165:Crai
125:Type
175:in
321::
284:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
