Improving heritage impact assessment: an analytical critique of the ICOMOS guidelines

Figures & data

Figure 1. The co-existing heritage management discourses. (Adapted from Ashworth 1994a, 2011).

Table 1. Characteristics of the heritage management discourses. (Based on Ashworth 1994a; Ashworth 2011).

	Discourses
	Preservation	Conservation	Heritage Planning
Focus	Object	Ensemble	Narrative(s)
Goal	Protection	Adaptive reuse	Use
Justification	Value	Value/Re-use	Utility
Criteria/values	Intrinsic	Preserve purposefully	Extrinsic
Authenticity of …	Object	Compromise	Experience
Change	Immutable	Adaptable	Flexible
Temporal nature of value	Static	Metastable	Dynamic
Actors (who has authority)	Experts	Policy makers/Planners	Users

Figure 2. The Liverpool Waters development project: Before (Rust Studio 2016).

Figure 3. The Liverpool Waters development project: After (Rust Studio 2016).

Table 2. Example guide for assessing the magnitude of impact on built heritage or Historic Urban Landscape attributes (modified from ICOMOS 2011).

No Change	Negligible change	Minor change	Moderate change	Major change
No change to fabric or setting.	Slight changes to historic building elements or setting that hardly affect it.	Changes to key building elements, such that the asset is slightly different. Change to setting of an historic building, such that it is noticeably changed.	Changes to many key historic building elements, such that the resource is significantly modified. Changes to the setting of an historic building, such that it is significantly modified.	Change to key historic building elements that contribute to OUV, such that the resource is totally altered. Comprehensive changes to the setting.

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Rust Studio. 2016. “Liverpool Waters: Before and after Photomontages.” Accessed 10 October 2016. http://rust.studio/portfolio/photomontage-cgi-3d/.

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