|Parapara Hydroelectric Scheme Homepage Environmental Effects Assessment.. page 13 contents|
Each of these components is now examined in turn.
Re-opening of this section of road requires the removal of vegetation, reshaping and water-tabling the surface, re-establishing culverts and supplying and placing aggregates which are obtainable locally from various cuttings on the legal access road from Richmond Flat.
In order to provide both construction and maintenance access to the tunnel headworks, a new road alignment is proposed to leave the existing alignment at GR 808491 and sidle downward towards the head of Richmond Flat at GR 811492 skirting the tailings dumps on the northern margin of the flat on their eastern side.
Environmental Impacts / Mitigation
Minimising all of the effects of roading activities is a priority with this proposal. These include detailed road route planning to avoiding significant vegetation, historical remains, ground which will be subject to unnecessary instability and to minimising visual impacts. The formation widths will be limited to 3.5m plus water tables on straight sections with passing opportunities included where these can be provided with the minimum of impact. Vegetation removal on the side of this construction will not exceed one metre to either side with the preservation of all downslope vegetation. No side casting of trimmed or cut material shall be made over existing vegetation. Excavated material not required for local filling shall be carted to other established and managed filling sites. Culverts will be placed in a best practice manner in all watercourses and at other intervals appropriate to the side slope catchments and minimising scouring of water tables.
Vegetation which is required to be removed shall be placed locally upslope wherever possible for decomposition or, as a alternative, to a nearby site for decomposition. Newly formed batters where required will be promptly spread with local surface gathered topsoil for re-seeding as part of the construction sequence.
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