- Prev
- Contents
Chapter F8 Renewal of roads
F8.3 W/C 213: Drainage renewals
Definition: work category 213
Drainage renewals
This work category provides for the renewal of drainage facilities that is not routine in nature, but that will reduce future maintenance costs.
Examples of qualifying activities
Examples of qualifying activities for work category 213 include:
- renewal of culverts having a cross-sectional area less than 3.4 square metres
- repair and replacement of kerb and channel, provided that the deterioration is likely to adversely affect the performance of the pavement.
Exclusion: work category 213
Work category 213 excludes replacement of culverts having a cross-sectional area of 3.4 square metres or greater. These are funded under work category 322: replacement of bridges and other structures.
Evaluation: work category 213
To qualify for inclusion in work category 213, the work must be the long-term least-cost option for the RCA, calculated in terms of present value (PV).
RCAs must undertake economic efficiency evaluation of individual projects and make copies of the evaluations available as requested by the NZTA.
Reference: A simplified economic efficiency procedure is provided for drainage renewals in the Economic evaluation manual, volume 1 – see SP1.
- Prev
- Contents

