D5018 | Derwent Valley Water Board | [20th cent] | Derwent Valley Water Board | Derbyshire Record Office |
D5018/1 | Water board survey plan of Derwent Dam to Walker Clough | 20th cent | Derwent Valley Water Board | Derbyshire Record Office |
D5018/2 | Water board survey plan of Ouzleden Bridge | 20th cent | Derwent Valley Water Board | Derbyshire Record Office |
D5018/3 | Water board survey plan of Abbey Brook Bridge | 20th cent | Derwent Valley Water Board | Derbyshire Record Office |
D5018/4-5 | Water board survey plans of Howden Reservoir | 20th cent | Derwent Valley Water Board | Derbyshire Record Office |
D5018/6 | Water board survey plan of Westland Valley | 20th cent | Derwent Valley Water Board | Derbyshire Record Office |