Warrawee Substation - Review of Environmental Factors

Assessment of the environmental impacts and risksConstruction accessDuring construction the two Brentwood Avenue access points are to be used as theprimary access to the substation site and also the compound location. The HastingsRoad access gate would potentially be used to access the construction compound.The use of this gate would be minimised and would be used when access to theconstruction compound is blocked due to construction works occurring at thesubstation site. Impacts from the usage of this site are considered to be minor due tothe infrequent use of the access. Any impacts would be minimised through trafficcontrol measures which would be outlined in the Traffic Management Plan.Increase in vehicle movementsThe proposal is expected to result in on average between 4 and 24 vehiclemovements per day. The maximum number of movements would be between 20 and50 vehicle movements per day. This would equate to a maximum of six vehicles perhour, however, on average these movements would be three vehicles per hour. Themaximum number of vehicles is expected to occur during the bulk earthworks on siteand would be associated with the removal of spoil. This period would last forapproximately 80 days. A detailed breakdown of the vehicle movements for eachconstruction activity is located in Table 2.2.This increase in vehicle numbers is not considered significant and would not result inany impact to the operation of the surrounding road network. Due to the proximity ofthe proposal to the Knox Grammar School, impacts during school start and end timeswould potentially be high due to the number of vehicles in the area during these times.To minimise these impacts, vehicle movements (in particularly heavy vehicles) duringthese times would be minimised.The proposal would potentially require the use of oversized vehicles to delivercomponents of the new substation, particularly during the fit out stage. Thesedeliveries would be infrequent and would only be undertaken after consulting withRoads and Maritime Services (RMS) and NSW Police. RailCorp will advise residentsof these vehicle movements.At the peak of the construction period, it is anticipated that approximately 20 staffwould be working on the site. Under a worst-case scenario, it is assumed that all ofthese staff would drive to the site in separate cars. This short term increase invehicular movements is unlikely to have a significant effect on the function of the localroad network. There would be on-site parking, however during the worst casescenario construction staff would be required to park in surrounding street. There issufficient on-street parking in Brentwood Avenue, however the western end ofBrentwood Avenue is unlikely to supply sufficient on-street parking, therefore theparking may occur further to the east.Impacts to pedestrian movementsBrentwood Avenue forms part of a pedestrian access way to and from WarraweeStation and Knox Grammar School. Brentwood Avenue is likely to experience anumber of pedestrian movements at peak periods (e.g. end of school day). Duringconstruction the introduction of additional vehicles to the road network wouldWarrawee Substation Project/Review of Environmental FactorsPage 43 of 64