Question On Notice No. 787 asked in the Legislative Council on 9 August 2022 by Hon James Hayward
Question Directed to the: Leader of the House representing the Minister for Transport; Planning; Ports
Parliament: 41 Session: 1
Question
I refer to sediment runoff from the Albany Ring Road construction site, and I ask:
(a) what sediment control measures are in place during the construction of the road;
(b) can the Minister detail what planning measures have been put in place to
manage sediment run off from the construction of the road onto
neighboring properties and the environment, specifically in terms of:
(i) site layout;
(ii) storm water flow;
(iii) sediment fences;
(iv) management of on-site traffic; and
(v) stabilization of entry and exit points to the site;
(c) has the Department taken any measurements of the sediment coming off the
Albany Ring Road construction site over the last 12 months and, if so, what were the results;
(d) on how many occasions has the Department taken measurements of the
sediment coming off the Albany Ring Road construction site and at what
locations;
(e) has Main Roads contractor Decmil provided information regarding:
(i) when it plans to clean up the sediment that has run off onto adjoining properties from the construction site; and
(ii) how it plans to clean up this sediment;
(f) when will the Department provide information related to sediment clean-up plans to affected residents; and
(g) has Department of Water and Environmental Regulation investigated/measured sediment runoff in local streams, rivers
and creeks in the vicinity of the Albany Ring Road construction site,
and if so what were the findings?
Answered on 20 September 2022
(a)-(d) Numerous measures have been taken to minimise sediment migration offsite. These include, but are not limited to:
- Installation of permanent drainage basins
- Compaction of materials to minimise soil loss.
- Installation of sediment fencing at the project boundary and coir logs across waterways.
- Rock pitched drains
- Earth bunds to attenuate water
- Earthworks directing water through controls
- Slope breaks to change the hydraulic grade lines; and
- Pre and post rain inspections to ensure effectiveness and appropriateness
In addition to the measures mentioned above, a landscaping program to revegetate the roadsides following construction will be implemented.
(e)-(f) Residents affected by displaced sediment have been contacted with an offer to remove the displaced sediment, restoring their lots to their pre-project condition. Remediation work is expected to occur in the summer period.
(g) This question should be directed to the Department of Water and Environmental Regulation.