Heritage Impact Assessment Calculator
Score development risk to archaeological sites from proximity, project type, and site significance.
Inputs
Results
Impact Risk Score
28/100
Risk Level
Moderate - Standard mitigation sufficient
How to Use This Calculator
- Enter Site Significance, Low (local), and Moderate (regional).
- Set High (state), National Register / World Heritage, and Distance to Development.
- Adjust Development Type, Surface Only (grading, paving) as needed.
- Review Impact Risk Score (/100) and Risk Level.
- Use Recommendation and Significance Factor to inform your decision.
How the result changes with Distance to Development
| Distance to Development | Impact Risk Score | Risk Level |
|---|---|---|
| 200 | 24/100 | Low - Minimal impact expected |
| 700 | 20/100 | Low - Minimal impact expected |
| 1,300 | 20/100 | Low - Minimal impact expected |
| 1,800 | 20/100 | Low - Minimal impact expected |
What each input means
- Site Significance
- Cultural significance of the archaeological site.
- Distance to Development
- Distance from site boundary to proposed construction.
- Development Type
- Type of proposed construction activity.
- Proposed Mitigation
- Level of mitigation being considered.
- Site Condition
- Current physical condition and integrity of the site.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersSite Significance = 2, Distance to Development = 50, Development Type = 2, Proposed Mitigation = 2 = 5 input(s) provided
- Calculate Impact Risk ScoreImpact Risk Score28 = 28
- Calculate Risk LevelModerate - Standard mitigation sufficient = Moderate - Standard mitigation sufficient
- Calculate RecommendationArchaeological monitoring during construction = Archaeological monitoring during construction
- Calculate Significance FactorSignificance Factor5 = 5
Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.
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