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RATING | Classification | Definition | Probable works |
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0 | Excellent | No slope defects. | |
1 | Good | Some surface instability with minor falls. No ongoing movement. | No maintenance needed. |
2 | Fair | Minor slips in face. Surface instability, with falls that encroach onto pavement or block drains. Open cracking or and loosening of minor blocks. Blocked surface or ground drains. Minor seepage. No ongoing movement. |
Clear debris, minor maintenance or repairs. |
3 | Poor | Slip affecting part of face Many falls onto pavement. Cracking and loosening of blocks. Water leakage or standing water. Ongoing movement unlikely. |
Some slope stabilisation necessary. |
4 | Very Poor | Face slip and threatening property. Major blocks at risk of falling. Drainage system not functioning, leakage down face. Possible ongoing movement. |
Major stabilisation or retaining wall needed. |
5 | Critical | Major landslide affecting pavement. Probable ongoing movement. |
Retaining wall or major slope stabilisation. |
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