43.
It should be noted that not all aspects of a heritage assets will contribute to its significance and high value assets are not necessary highly sensitive to all impacts.
25.4.3.3 Magnitude 44. Due to the great variety of resources and receptors, there is no standard scale of comparison against which the severity of effects on heritage assets may be judged. Assessment of direct effects has therefore considered the proportion of the features affected, and whether key characteristics would be impacted upon. Direct effects are permanent, as the loss or damage to cultural heritage material cannot be repaired, replaced or re-created.
45.
Indirect effects can be permanent or transitory and refer to the perceptible visual effects on the physical setting of heritage assets that can be appreciated at a given time. Intrusive noise can also adversely impact on heritage assets whose wild or remote setting form part of their significance.
46.
Impacts are expressed using a four point scale from ‘negligible’ to ‘high’. Effects may be beneficial as well as adverse. The assignment of a magnitude of effect in this way is a matter of professional judgement.
Table 25.7 Definitions of the Magnitude Levels on Heritage Assets Magnitude
Definition High Medium
Permanent changes over the whole receptor, with fundamental alteration to key characteristics that form part of the significance of the asset or its setting. This can be positive or negative.
Considerable or permanent changes, over the majority of the receptor, which results in discernible alteration to key characteristics that form part of the significance of the asset or its setting. This can be positive or negative.
Low
Change (temporary or permanent), over a minority of the receptor or which has limited but discernible alteration to key characteristics that form part of the significance of the asset or its setting. This can be positive or negative.
Negligible Uncertain
Change that either has a very minor impact on a heritage asset or its setting or which is neutral in effect.
Precise nature or extent of impact unknown. Presence or extent of heritage asset uncertain. This scenario will most commonly occur with buried archaeological remains, or where potential indicated by a find spot is undefined.
Preliminary Environmental Information April 2014
East Anglia THREE Offshore Windfarm
Chapter 25 Onshore Archaeology Page 19
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49