Work category 213: Drainage renewals

Introduction

This work category A type of activity – not confined to a particular activity class, e.g. new roads (work category 323) appears in:

* activity class 12 – local road improvements
* activity class 13 – state highways improvements provides for the renewal of drainage facilities that is not routine in nature, but that will reduce future maintenance costs.

This definition applies to the 2012-15 NLTP A National Land Transport Programme Interrelated and complementary combination of activities that, when delivered in a coordinated manner, produce synergies – can span more than one work category and more than one activity class, e.g. a programme could include a road improvement and public transport improvement activities. adopted by the NZTA under section 19 of the LTMA, as from time to time amended or varied .  For the 2015-18 NLTP please refer to the updated definition for work category 213.

Examples of qualifying activities

Examples of qualifying activities include, but may not be limited to:

• renewal of culverts One or more adjacent pipes or enclosed channels running across and below road formation level having a cross-sectional area less than 3.4 square metres. having a cross-sectional area less than 3.4 square metres
• repair and replacement of Kerb and Channel Combined kerb A border of rigid material, usually raised, which is formed at the edge of a traffic lane or shoulder. and drainage channel. , provided that the deterioration is likely to adversely affect the performance of the pavement The road structure that is constructed on the subgrade and supports the traffic loading. .

Other potential activities that are not in the above list should be discussed with the NZTA for eligibility.

Exclusions

This work category A type of activity – not confined to a particular activity class, e.g. new roads (work category 323) appears in:

* activity class 12 – local road improvements
* activity class 13 – state highways improvements excludes replacement of culverts One or more adjacent pipes or enclosed channels running across and below road formation level having a cross-sectional area less than 3.4 square metres. having a cross-sectional area of 3.4 square metres or greater.

These are funded under Work category 322: Replacement of bridges and structures.

Funding assistance rate

The usual funding assistance rate is:

• the Approved Organisation’s base rate
• the Approved Organisation’s special purpose roads rate, and
• 100 percent for the NZTA (state highways).

Evaluation of activities

To qualify for inclusion in this work category A type of activity – not confined to a particular activity class, e.g. new roads (work category 323) appears in:

* activity class 12 – local road improvements
* activity class 13 – state highways improvements , the work must be the long-term least-cost option for the Approved Organisation and the NZTA (state highways), calculated in terms of present value (PV A future cost or benefit at its discounted value at the present day. Net present value (NPV) is the present value of a future benefit less the present value of the associated future cost. All benefits and costs are in current day values, without adjustment for inflation. ).

Approved Organisation and the NZTA (state highways) must undertake economic efficiency evaluation of individual projects and make copies of the evaluations available as requested by the NZTA.

A simplified economic efficiency procedure is provided for drainage renewals in the Economic Evaluation Manual (Jan 2016) – see SP1.