33:
158:
178:. On the south side of the valley are the Hen Gloddfa and Ceunant Du quarries, while on the north is Foel Grochan, named after the mountain it mined. These may have started working as early as the 14th century; the earliest confirmed date of operating is 1500 when the local house Plas Aberllefenni was roofed in slates from the mine. The mines were in continuous operation until 2002, making them the longest continually working slate mines in the world.
165:
At the point where the Nant Bychan joins the Afon
Llefenni, about a third of the way from Aberllefenni to the head of the valley is Hengae House. This was the home of the Anwyl family during the 19th century.
229:
The County
Families of the United Kingdom; Or, Royal Manual of the Titled and Untitled Aristocracy of England, Wales, Scotland, and Ireland ...
254:
319:
279:
32:
174:
The major industry in Cwm Hengae was slate quarrying. Near the eastern end of the valley lie the three quarries that make up the
215:. Royal Commission on the Ancient and Historical Monuments of Wales. 30 December 1921. pp. 164–. GGKEY:U89CDD2G7U4.
75:
68:
346:
296:
189:, a less successful endeavor. On the south side of the valley, opposite Cambergi is the even less successful
135:
341:
157:
190:
175:
131:
111:
315:
275:
250:
210:
244:
212:
An
Inventory of the Ancient Monuments in Wales and Monmouthshire: VI – County of Merioneth
186:
182:
335:
127:
51:
227:
139:
193:. There are a few much smaller trial workings towards the head of the valley.
142:
90:
77:
146:
123:
156:
61:
37:
297:"For Sale: An ENTIRE Gwynedd slate quarrying village"
145:ran along the valley, connecting Aberllefenni with
107:
67:
57:
47:
42:
20:
126:that runs roughly north-west from the village of
246:A Portrait of Machynlleth and Its Surroundings
8:
274:. Avon-Anglia Publications & Services.
17:
134:river runs along the valley and several
202:
310:Richards, Alun John (1 January 2004).
249:. Coch Y Bonddu Books. pp. 59–.
7:
270:The Corris Railway Society (1988).
14:
161:Hengae House, seen from the north
31:
181:Further west, on the flank of
1:
295:Hughes, Owen (23 June 2016).
138:occupy the valley sides. The
363:
312:Slate Quarrying at Corris
299:. North Wales Daily News.
30:
25:
226:Edward Walford (1886).
162:
314:. Llygad Gwalch Cyf.
160:
232:Chatto & Windus.
243:Evan Jones (2009).
176:Aberllefenni Quarry
87: /
347:Valleys of Gwynedd
272:A Return to Corris
163:
256:978-1-904784-24-1
117:
116:
354:
326:
325:
307:
301:
300:
292:
286:
285:
267:
261:
260:
240:
234:
233:
223:
217:
216:
207:
102:
101:
99:
98:
97:
92:
91:52.673°N 3.819°W
88:
85:
84:
83:
80:
35:
18:
362:
361:
357:
356:
355:
353:
352:
351:
332:
331:
330:
329:
322:
309:
308:
304:
294:
293:
289:
282:
269:
268:
264:
257:
242:
241:
237:
225:
224:
220:
209:
208:
204:
199:
187:Cambergi quarry
183:Mynydd Cambergi
172:
170:Slate quarrying
155:
95:
93:
89:
86:
81:
78:
76:
74:
73:
38:
12:
11:
5:
360:
358:
350:
349:
344:
334:
333:
328:
327:
321:978-1845240684
320:
302:
287:
281:978-0905466897
280:
262:
255:
235:
218:
201:
200:
198:
195:
171:
168:
154:
151:
136:slate quarries
130:in Wales. The
115:
114:
109:
105:
104:
96:52.673; -3.819
71:
65:
64:
59:
55:
54:
49:
45:
44:
40:
39:
36:
28:
27:
23:
22:
13:
10:
9:
6:
4:
3:
2:
359:
348:
345:
343:
340:
339:
337:
323:
317:
313:
306:
303:
298:
291:
288:
283:
277:
273:
266:
263:
258:
252:
248:
247:
239:
236:
231:
230:
222:
219:
214:
213:
206:
203:
196:
194:
192:
191:Hengae quarry
188:
184:
179:
177:
169:
167:
159:
152:
150:
148:
144:
141:
137:
133:
132:Afon Llefenni
129:
125:
121:
113:
112:Afon Llefenni
110:
106:
100:
72:
70:
66:
63:
60:
56:
53:
50:
46:
41:
34:
29:
24:
19:
16:
342:Aberllefenni
311:
305:
290:
271:
265:
245:
238:
228:
221:
211:
205:
180:
173:
164:
153:Hengae House
128:Aberllefenni
119:
118:
52:Aberllefenni
26:Cwm Llefenni
15:
94: /
69:Coordinates
336:Categories
197:References
143:Sarn Helen
140:Roman road
120:Cwm Hengae
79:52°40′23″N
21:Cwm Hengae
147:Dolgellau
82:3°49′08″W
43:Geography
48:Location
103:
58:Country
318:
278:
253:
124:valley
185:lies
122:is a
108:River
62:Wales
316:ISBN
276:ISBN
251:ISBN
338::
149:.
324:.
284:.
259:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
