The Hodder and Thirlmere Aqueduct Access Gates
Compiled & Researched by the Nutters Mobile Surveillance Unit

F e a t u r e d W a l k
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Ref Reservoir Location Class A1/A2 Grid Ref
1 Alston Reservoir 3 1 SD60503600
2 Arnfield Reservoir 2 SK01309730
3 Ashworth Moor Reservoir 2 SD83001530
4 Barnacre-Grizedale Lea Reservoir 1 SD52804820
5 Barnacre-North & South Reservoir 2 SD52404790
6 Baystone Bank Reservoir 1 SD17208590
7 Blackstone Edge Reservoir 2 SD97201830
8 Bleawater Reservoir 1 NY44801070
9 Calf Hey Reservoir 2 SD75302240
10 Cant Clough Reservoir 2 SD89503080
11 Castle Carrock Reservoir 2 NY54505450
12 Castleshaw (Upper Reservoir) 2 SD99801010
13 Chapel House Inpounding Reservoir 2 NY26003580
14 Clough Bottom Reservoir 2 SD94602670
15 Clowbridge Reservoir 2 SD82402880
16 Coldwell Reservoir 2 SD90203640
17 Combe Gill Reservoir 1 NY25201320
18 Cowpe Reservoir 2 SD84402020
19 Crummock Water Reservoir 1 NY15202060
20 Damas Ghyll Reservoir 2 SD52605750
21 Dean Clough Reservoir 2 SD71703320
22 Delph Reservoir 2 SD70001560
23 Dovestone Reservoir 2 SE01200380
24 Dubbs Reservoir 1 NY42100280
25 Duddon River 1 SD20809470
26 Eden River 2 NY47305320
27 Ennerdale Reservoir 1 NY09001530
28 Entwistle Reservoir 2 SD72001760
29 Fernilee Reservoir 2 SK01307770
30 Fishmoor Reservoir 2 SD69602610
31 Ghyll Head Reservoir 2 SD39309230
32 Greenbooth Reservoir 2 SD85301520
33 Greenup Syke Reservoir 1 NY24301760
34 Hanging Lees Reservoir 2 SD96901240
35 Harlock Reservoir 1 SD24807900
36 Hausegill Reservoir 2 NY26703260
37 Haweswater Pumping Station Reservoir 2 NY50301570
38 Haweswater Reservoir 2 NY48001300
39 Hayeswater Reservoir 1 NY43101230
40 Horse Coppice Reservoir 2 SJ96808370
41 Hug Bridge (River Dane) 1 SJ93206360
42 Hurleston Reservoir 2 SJ63405530
43 Hurstwood Reservoir 2 SD88803160
44 Kinder Reservoir 2 SK05608810
45 Lamaload Reservoir 2 SJ97007530
46 Laneshaw Reservoir 2 SD94604160
47 Langthwaite Reservoir 2 SD49805910
48 Levers Water Reservoir 1 SD27909930
49 Lower Swineshaw Reservoir 2 SK00209900
50 Millbeck Reservoir 1 NY26102680
51 Mitchells No 1 Reservoir 2 SD79002730
52 Mitchells No 2 Reservoir 2 SD79002760
53 New Years Bridge Reservoir 2 SD98401070
54 Ogden Reservoir 2 SD81904000
55 Ogden Reservoir (Haslingden) 2 SD76502250
56 Padfield Reservoir 2 SK03709960
57 Pennington Reservoir 2 SD25807890
58 Piethorne Reservoir 2 SD96301250
59 Poaka Beck Reservoir 2 SD24307830
60 Rhodeswood Reservoir 2 SK04709830
61 Ridgegate Reservoir 1 SJ94907140
62 Rivington Lower Reservoir 1 SD63101220
63 Rooden Reservoir 2 SD97201180
64 Roughten Gill Reservoir 1 NY29802750
65 Sailbeck Reservoir 1 NY18701770
66 Springmill Reservoir (Cowm) 2 SD87501700
67 Springs Reservoir 2 SD69101480
68 Stocks Reservoir 2 SD72005460
69 Sunnyhurst Reservoir 2 SD67702210
70 Swinden Reservoir 1 SD87303270
71 Swineshaw Lower Reservoir 1 SK04309550
72 The High Reservoir 1 NY28202630
73 Thirlmere Compensation Reservoir 1 NY30801880
74 Thirlmere Reservoir 1 NY32401390
75 Walkerwood Reservoir 2 SJ98509910
76 Warland Reservoir 2 SD95902100
77 Watergrove Reservoir 2 SD91001770
78 Wayoh Reservoir 2 SD73701640
79 Whiteholme Reservoir 2 SD97001990
80 Windermere 2 SD39309930
81 Worm Gill Reservoir 1 NY10101120
82 Worthington Reservoir 2 SD58301100
83 Wyre River 2 SD49504560
84 Yeoman Hey Reservoir 2 SE02200490
85 Acomb Landing York 2 SE58305260
86 Agden Reservoir 1 SK26109230
87 Albert Reservoir 1 SE07302570
88 Angram Reservoir 1 SE04007600
89 Ardsley Reservoir 1 SE29002500
90 Baitings Reservoir 1 SE01001890
91 Barmby 2 SE70102960
92 Beaverdyke Reservoir 1 SE22805460
93 Blackmoorfoot Reservoir 1 SE09901300
94 Boltby Reservoir 1 SE49708850
95 Boothwood Reservoir 1 SE03001630
96 Broadstones Reservoir 1 SE19600640
97 Broken Scar 2 NZ25501390
98 Broomhead Reservoir 1 SK26909590
99 Brownhill Reservoir 1 SE11700640
100 Buckden 1 SD94407740
101 Burnhope Reservoir 2 NY84953906
102 Catcleugh Reservoir To Gunnerton Wtw 2 NY74700320
103 Chelker Reservoir 2 SE05505150
104 Cod Beck Reservoir 1 SE46309860
105 Dale Dyke Reservoir 2 SK24309170
106 Derwent Reservoir To Mosswood Wtw 2 NZ02605140
107 Digley Reservoir 1 SE11000700
108 Eccup Reservoir 2 SE30804180
109 Elslack Reservoir 1 SD93704820
110 Elvington 2 SE70504860
111 Embsay Reservoir 1 SD99805460
112 Fontburn Reservoir 2 NZ04809370
113 Gorpley Reservoir 1 SD91002300
114 Grassholme Reservoir To Lartington Wtw 2 NY94802270
115 Grimwith Reservoir 1 SE06006450
116 Hill Top Reservoir 1 SE11504680
117 Hisehope Reservoir To Honey Hill Wtw 2 NZ02404650
118 Hury Reservoir To Lartington Wtw 2 NY96701940
119 Ingbirchworth Reservoir 1 SE21500600
120 Keighley Moor Reservoir 1 SD98903940
121 Kielder Cross To Mosswood Wtw 2 NZ04145099
122 Langsett Reservoir 1 SE21400020
123 Leighton Reservoir 1 SE16307880
124 Linacre Upper Reservoir 2 SK32507270
125 Lobwood River Wharfe Intake 2 SE07505200
126 Longwood Upper Reservoir 1 SE09701700
127 Lower Barden Reservoir 1 SE03505670
128 Lower Laithe Reservoir 1 SE01303680
129 Lower Redmires Reservoir 2 SK26808550
130 Lumley 2 NZ28635021
131 Lumley Moor Reservoir 1 SE22307070
132 March Ghyll Reservoir 1 SE12205110
133 Midhope Reservoir 1 SK22309940
134 Mitford 2 NZ18208570
135 Moor Monkton Storage Reservoir 2 SE52705770
136 Ovingham Intake To Horsley Wtw 2 NZ09686424
137 Ponden Reservoir 1 SD99503720
138 Reva Reservoir 2 SE15104260
139 Ringstone Reservoir 1 SE05001800
140 Rivelin Lower Reservoir 1 SK27508670
141 River Hull At Hempholme Lock 2 TA08004990
142 Roundhill Reservoir 1 SE15207730
143 Royd Moor Reservoir 2 SE22200480
144 Ruswarp 2 NZ88600880
145 Scaling Reservoir 2 NZ74901290
146 Scargill Reservoir 1 SE23305350
147 Scarhouse Reservoir 1 SE05807690
148 Smiddy Shaw Reservoir To Honey Hill Wtw 2 NZ04704650
149 Starbotton 1 SD95507480
150 Swinsty Reservoir 2 SE19605280
151 Ten Acre Reservoir 1 SE24805340
152 Thornton Moor Reservoir 1 SE05203300
153 Thornton Steward Storage Channel 2 SE19008610
154 Tunstall Reservoir 2 NZ06504050
155 Warkworth 2 NU23820607
156 Waskerley Reservoir To Honey Hill Wtw 2 NZ02504450
157 Watersheddles Reservoir 1 SD96903800
158 West Beck 2 TA08205200
159 Whittle Dene No 1 (Great Northern Reservoir) 2 NZ06646827
160 Whittle Dene No 2 (Low Reservoir) To Henderson Filters 2 NZ06906768
161 Whittle Dene No 3 (Great Southern Reservoir) To Horsley Wtw 2 NZ07306730
162 Wydon Burn Reservoir 1 NY93206320
163 Blackbrook Reservoir 2 SK45501710
164 Blithfield Reservoir 2 SK07062269
165 Brownsover 2 SP51507660
166 Campion Hills 2 SP33206650
167 Church Wilne Reservoir 2 SK46503190
168 Cropston Reservoir 2 SK55001110
169 Derwent Reservoir 2 SK17158990
170 Dowdeswell 1 SO99101970
171 Draycote Reservoir 2 SP45277020
172 Foremark Reservoir 2 SK32902450
173 Hampton Loade 2 SO74608710
174 Howden Reservoir 2 SK16859260
175 Ladybower Reservoir 2 SK20308605
176 Little Eaton 2 SK36504060
177 Llanforda (Vyrnwy) 1 SJ27742948
178 Lower Shustoke 2 SP22509105
179 Mythe 2 SO88953355
180 Nanpantan Reservoir 2 SK50901720
181 Ogston Reservoir & Carsington Res 2 SK38055990
182 Pen-Y-Gwely 2 SJ22103210
183 Purton 2 SO69500425
184 Shelton 2 SJ46701370
185 Stanford Reservoir 2 SP59908030
186 Staunton Harold Reservoir 2 SK37902420
187 Strensham 2 SO86503990
188 Tittesworth Reservoir 2 SJ99375854
189 Trimpley Res 2 SO77207860
190 Whitacre Reservoir 2 SP20609115
191 Whitbourne 2 SO72805730
192 A134 Road Bridge (River Wissey) 2 TL70309890
193 Abberton Reservoir 2 TL98171855
194 Alton Water 2 TM16003580
195 Ardleigh Reservoir 2 TM03502810
196 Belaugh (River Bure) 2 TG28521882
197 Cadney Reservoir 2 TA01310446
198 Cadney Top (River Ancholme) 2 TA00110282
199 Clapham (River Ouse) 2 TL03605160
200 Costessey (River Wensum) 2 TG16451325
201 Costessey Pits No. 1 2 TG16301318
202 Costessey Pits No. 2 2 TG16301310
203 Covenham Reservoir 2 TF34639599
204 Cut-Off Channel At Stoke Ferry 2 TL70009875
205 Grafham Reservoir 2 TL17006710
206 Hanningfield Reservoir 2 TQ73329938
207 Heigham (River Wensum) 2 TG21200980
208 Hollowell Reservoir 2 SP69007240
209 Horning (River Bure) 2 TG35791635
210 Langford (River Blackwater) 2 TL83600915
211 Langford (River Chelmer) 2 TL83390860
212 Langford Mill (River Blackwater) 2 TL83650903
213 Langham (River Stour) 2 TM02563446
214 Lound Mill Water 2 TG50240072
215 Lound Run (Fritton Lakes) 2 TG49850098
216 Marham (River Nar) 2 TF72301200
217 Ormesby Broad 2 TG46691553
218 Pitsford Reservoir 2 SP75706890
219 Ravensthorpe Reservoir 2 SP68107040
220 Rutland Water 2 SK94350730
221 Saltersford Road Bridge (River Witham) 2 SK92693346
222 Shipmeadow (River Waveney) 2 TM38509070
223 Stratford St Mary (River Stour)2 2 TM04233424
224 Thunder Bridge (Cringle Beck) 2 SK92072874
225 Banbury Reservoir 2 TQ35809120
226 Bessborough Reservoir 2 TQ11906820
227 East Warwick Reservoir 2 TQ35008820
228 Farmoor 1 Reservoir 2 SP44580667
229 Farmoor 11 Reservoir 2 SP44580592
230 Grimsbury Reservoir 2 SP45904190
231 Hornsey Reservoir 2 TQ35508830
232 Island Barn Reservoir 2 TQ14206730
233 King George V South Reservoir 2 TQ37409520
234 King George V1 Reservoir 2 TQ04107240
235 Knight Reservoir 2 TQ11806820
236 Lockwood Reservoir 2 TQ35609070
237 Queen Elizabeth Ii Reservoir 2 TQ12306780
238 Queen Mary Reservoir 2 TQ07907030
239 Queen Mother Reservoir 2 TQ00407680
240 River Cherwell (Grimsbury) 2 SP45804170
241 River Kennet (Fobney) 2 SU70307120
242 River Thames (Bray) 2 SU91557870
243 River Thames (Chertsey) 2 TQ04696793
244 River Thames (Egham) 2 TQ02247180
245 River Thames (Sunnymeads) 2 SU99927574
246 River Thames (Walton) 2 TQ08386620
247 River Tillingbourne (Shalford) 2 SU99804800
248 River Wey (Shalford) 2 SU99804800
249 River Windrush (Worsham) 2 SP30101060
250 Sor Brook (Grimsbury) 2 SP45903720
251 Staines North Reservoir 2 TQ04707310
252 Staines South Reservoir 2 TQ04707290
253 Stoke Newington East Reservoir 2 TQ32908760
254 Thames At Farmoor 2 SP43900640
255 Walthamstow No.5 Reservoir 2 TQ35208840
256 West Warwick Reservoir 2 TQ34808800
257 William Girling Reservoir 2 TQ36509300
258 Wraysbury Reservoir 2 TQ02307420
259 Ardingly Reservoir 2 TQ33402880
260 Arlington Reservoir 2 TQ53470710
261 Barcombe Mills 2 TQ43731590
262 Bewl Water (Reservoir) 2 TQ68103350
263 Bough Beech Reservoir 2 TQ49304740
264 Burnt House 2 SZ58208530
265 Crowhurst Bridge 2 TQ68202640
266 Darwell Reservoir 2 TQ72102110
267 Eccles Lake 2 TQ72206110
268 Hardham 2 TQ03281780
269 Hazards Green 2 TQ67811176
270 High Wood Reservoir (Gaters Mill) 2 SU46371563
271 Holywell Pumping Station 2 TQ36732786
272 Otterbourne 2 SU47032326
273 Pembury Raw Water Reservoir 2 TQ62654255
274 Plucks Gutter 2 TR26706340
275 Powdermill Reservoir 2 TQ80151925
276 River Line Abstraction A21 Roadbridge 2 TQ77501760
277 River Teise At Goudhurst 2 TQ70703710
278 Testwood 2 SU35301533
279 Upper Ouse Abstraction 2 TQ33202832
280 Vine Hall Stream At A21 Road Bridge 2 TQ77601770
281 Weir Wood Reservoir 2 TQ40503520
282 Argal Reservoir 1 SW76313278
283 Ashford Reservoir 2 ST23452840
284 Avon Reservoir 1 SX67906520
285 Bala Brook Intake 1 SX67156294
286 Barrow Reservoir(Numbers 1,2, And 3) 2 ST53806785
287 Blagdon Reservoir 2 ST50506010
288 Boswyn Stream 1 SW65903630
289 Brockenburrow Intake 1 SS66294175
290 Budleigh Brook 2 SY07328418
291 Burrator Reservoir 1 SX55136803
292 Cargenwyn Reservoir 1 SW65083521
293 Carwynnen Stream 1 SW64103760
294 Cheddar Reservoir 2 ST43705415
295 Cheddar Springs 2 ST46355385
296 Chew Reservoir 2 ST57006150
297 Clatworthy Reservoir 2 ST04303130
298 College No.4 Reservoir 1 SW77303350
299 Colliford Reservoir 1 SX17907110
300 Crowdy Reservoir 1 SX13978327
301 De Lank River 1 SX13587655
302 Devonport Leat (Dousland Intake) 1 SX55006837
303 Drift Reservoir 1 SW43902870
304 Durleigh Reservoir 2 ST27403630
305 Fernworthy Reservoir 1 SX67068430
306 Hawkridge Reservoir 2 ST21153640
307 Ivy Lake Blashford 2 SU15340754
308 Kennick Reservoir 1 SX80678386
309 Leigh Reservoir 2 ST19701770
310 Luxhay Reservoir 2 ST20201775
311 Meldon Reservoir 2 SX56369169
312 Monkswood Reservoir 2 ST75507110
313 Nutscale Reservoir. 2 SS86254340
314 Otterhead Reservoir 2 ST22601320
315 River Avon (At Knapp Mill) 2 SZ15459380
316 River Avon (At Matchams) 2 SU13370081
317 River Bray (At Leehamford) 1 SS67743992
318 River Brit At Watford Bridge 2 SY47209490
319 River Cober (At Wendron) 2 SW67523104
320 River Dart 2 SX80056163
321 River Erme 1 SX64036317
322 River Exe (At Bolham) 2 SS94881519
323 River Exe (At North Bridge, Pynes) 2 SX93109700
324 River Fowey (At Restormel) 1 SX09716247
325 River Fowey (At Trekeivesteps) 1 SX22726986
326 River Hayle (At St. Erth) 1 SW54953490
327 River Meavy (Stanlake Intake) 2 SX57397147
328 River Porth Intake (At Rialton) 1 SX84876230
329 River Stour (At Longham) 2 SZ06329735
330 River Swincombe 2 SX63257187
331 River Tamar (At Gunnislake) 2 SX43377235
332 River Tavy (At Lopwell) 2 SX47516503
333 River Taw (At Newbridge) 2 SS58232613
334 River Yealm 1 SX61706202
335 River Yealm (Broadall Lake) 1 SX61286196
336 River Yealm (Ford Brook) 1 SX61236184
337 River Yeo (At Loxhore) 2 SS60963658
338 Roadford Reservoir 2 SX42509010
339 Slade Reservoir (Lower) 1 SS50634574
340 Spinnaker Lake, Blashford 2 SU15730754
341 Squabmoor Reservoir 2 SY04028393
342 Stithians Reservoir 1 SW71903639
343 Sutton Bingham Reservoir 2 ST55501140
344 Thorns Intake (At Kenton) 1 SX90418069
345 Trenchford Reservoir 1 SX80668238
346 Tucking Mill Lake 2 ST76306160
347 Upper Tamar Lake 2 SS28901180
348 Venford Reservoir 1 SX68687118
349 West Ilkerton Stream 2 SS70474759
350 West Okement River 2 SX56048983
351 Wimbleball Reservoir 1 SS96542935
352 Wistlandpound Reservoir 1 SS64364148
353 Withey Brook (At Bastreet) 2 SX24407640
354 Afon Caeseg (Gerlan) 1 SH65736643
355 Afon Calettwr 1 SH60610908
356 Afon Cenllusg (Gerlan) 1 SH64086570
357 Afon Cwm Llechen (Bont Ddu) 1 SH67052019
358 Afon Dwyfor (Dolbenmaen 1 SH50804300
359 Afon Fathew (Penybont) 1 SH61630310
360 Afon Llafar (Gerlan) 1 SH64206568
361 Afon Rhythallt Or Afon Seiont (Crug) 1 SH54196386
362 Afon-Y-Bedol (Capel Curig) 1 SH70506178
363 Alaw Reservoir 2 SH37438539
364 Alwen Intake & Reservoir 2 SH95605300
365 Angidy Brook (Rogerstone) 2 ST50409990
366 Barmouth Junction 1 SH63131300
367 Bodwylan-Afon Gwril 1 SH60610908
368 Brithdir Mawr 2 SJ17906269
369 Bron Lletty 1 SH63131300
370 Bwllfa Graig Raw Water Reservoir 2 SN97300270
371 Cantref Reservoir 2 SN99681543
372 Castell Nos (Maerdy Low Level) 2 SN96320028
373 Cefni Reservoir 2 SH44607720
374 Ceunant-Y-Garnedd Stream (Dolweddelan) 1 SH69755299
375 Cilcain Reservoir 3 1 SJ16716420
376 Cilcain Reservoir 4 1 SJ15606420
377 Clywedog Reservoir 1 SJ01005743
378 Courtfarm Wye Raw 2 SO51671316
379 Craig-Y-Pistyll (Bontgoch) 1 SN71808560
380 Cray Reservoir 1 SN88262190
381 Cwmavon 2 SO26860702
382 Cwmtillery Reservoir (Low Level) 2 SO22020698
383 Dee At Berwyn (Horseshoe Falls) 2 SJ19484333
384 Dee At Twll 2 SJ38634636
385 Eastern Cleddau Via Cannaston Bridge (Bolton Hill,Valley Court) 2 SN06501500
386 Egnant Reservoir (Strata) 1 SN79106670
387 Elan Valley (Severn Trent) 2 SN91106410
388 Elan Valley (Welsh Water) 2 SN91106410
389 Ffynon Llugwy (Mynydd Llandegai) 1 SH69266241
390 Grwyne Fawr Reservoir 1 SO23403064
391 Llandegfedd Reservoir 2 ST32559876
392 Lluest Wen (Maerdy High Level) 2 SN94980157
393 Llwyn-On Reservoir 2 SO01181141
394 Llyn Anafon Reservoir (Llanfairfechan) 1 SH69807350
395 Llyn Arenig Fawr (Llidiardau) 1 SH85003796
396 Llyn Bodlyn Reservoir (Eithin Fynydd) 1 SH64602376
397 Llyn Bran (Bylchau) 1 TBA
398 Llyn Conwy Reservoir 1 SH78194574
399 Llyn Cowlyd (Bryn Cowlyd) 1 SH73756331
400 Llyn Cwellyn 1 SH55205560
401 Llyn Cwm Dulyn 1 SH48974976
402 Llyn Cwmystradllyn Reservoir 1 SH55874405
403 Llyn Cyfynwy 2 SJ21705453
404 Llyn Cynwch (Penycefn) 1 SH73702052
405 Llyn Dulyn (Llanbedr) 2 SH70236635
406 Llyn Eiddew Mawr Reservoir (Rhiwgoch) 1 SH64543369
407 Llyn Elsi Reservoir (Betws-Y-Coed) 1 SH78215562
408 Llyn Llygad Rheidol (Bontgoch) 1 SN79148781
409 Llyn Marchlyn Bach (Mynydd Llandegai) 1 SH60376302
410 Llyn Morwynion (Garreglwyd) 1 SH73524220
411 Llyn Tecwyn Uchaf(Cilfor) 1 SH63783817
412 Llyn Teifi (Strata) 1 SN77906760
413 Lower Carno Reservoir 2 SO16461293
414 Lower Lliw Reservoir (Felindre) 2 SN64890344
415 Mounton Brook (Whitemill) 1 ST47909530
416 Nant Braich Y Rhiw (Penybont) 1 SH62670123
417 Nant Cwmparc (Llwynypia) 1 SS93509600
418 Nant Esgair Eira 1 SH77720359
419 Nant-Y-Ffrith Reservoir 2 SJ24405323
420 Park Springs 1 SS06409790
421 Penderyn Reservoir 2 SN94000725
422 Pendinas Reservoir 2 SJ23675189
423 Penycae Bottom Reservoir 1 SJ27404540
424 Penycae Top Reservoir 1 SJ27404540
425 Perthcelyn Reservoir 1 ST05409715
426 Plas Uchaf Reservoir (Glascoed) 2 SH96707130
427 Pont Hywel Source 1 SN12902750
428 Pontsticill Reservoir 2 SO05961193
429 Preseli No.1 Reservoir 2 SN06172918
430 River Cleddau Western (Bolton Hill) 2 SM95341690
431 River Dee (Chester) 2 SJ41776633
432 River Dee (Heronbridge) 2 SJ41176429
433 River Dee (Huntington) 2 SJ41426337
434 River Dee At Poulton (Bretton) 2 SJ40795912
435 River Lugg (Intake At Byton) 1 SO36406410
436 River Solva (Middlemill) 2 SM80502590
437 River Teifi (Llechryd) 2 SN22804350
438 River Tywi (Towy) At Nantgaredig (Felindre, Capel Dewi) 2 SN48702040
439 River Wye (At Broomy Hill Intake) 2 SO49703920
440 River Wye (At Builth) 2 SO03255200
441 River Wye (At Mayhill) 2 SO51671316
442 River Wye (Llyswen) 2 SO12403950
443 River Wye (Lydbrook) 2 SO60201760
444 Shon Sheffrey Reservoir (Nantybwch) 2 SO12811154
445 Talybont Reservoir 1 SO10502041
446 Trinant Intake (Portis High Level) 2 SN83642440
447 Ty Mawr Reservoir 1 SJ27674793
448 Tyn-Y-Waun Raw Water Reservoir 1 SN91910334
449 Tywi (Towy) At Manorafan (Bryngwyn) 2 SN65712398
450 Upper Carno Reservoir 2 SO15351395
451 Upper Lliedi Res (Felinfoel) 2 SN51200420
452 Upper Neuadd Reservoir 1 SO02941877
453 Usk Reservoir (Bryngwyn) 1 SN82402910
454 Usk Reservoir (Portis Low Level) 2 SN82402910
455 Vivod Stream 1 SJ19524282
456 Wentwood Reservoir 1 ST43099302
457 Ynysyfro Reservoir 1 ST28568892
458 Ystradfellte Reservoir 1 SN94501760
460 Source: Environment Agency, 2000