2012 – Evaluation of marginally non-compliant dam filter materials using the No-Erosion Filter test method

Robert Kingsland, Jamie Anderson, Andrew Russell, David Brooke

This paper presents the methods, observations and results from a programme of No-Erosion Filter (NEF) testing for the evaluation of a manufactured filter aggregate product that did not conform to normally accepted D15F grading limits. Base materials tested include both dispersive and non-dispersive soils. The results are compared against published no-erosion, excessive erosion and continuing erosion thresholds. The paper comments on the validity of the adopted thresholds and the effectiveness of the NEF test as a filter evaluation method.

Keywords: dam, filter, test, no-erosion