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<br />Proposals for Revising Northern California Metroplex – Alameda County/Contra Costa County 15 <br />WNDSR TWO ARRIVAL NOISE AND SAFETY ISSUES: <br /> <br />OAK arrivals from the north were previously vectored over a seven-mile-wide corridor prior to <br />NextGen. Creation of the WNDSR RNAV to handle this previously dispersed traffic shifted and <br />concentrated all traffic to a corridor less than 0.5 miles wide over the topographically highest area of <br />the East Bay Hills. This significantly impacted densely populated residential areas including <br />Berkeley, Oakland, San Leandro and others. Daytime ambient monitored noise levels are less than <br />50dB and typically less than 45dB in much of these areas. Single aircraft noise levels over 78dB <br />have been measured. <br /> <br />WNDSR TWO is designed for arriving traffic from the north and north east including polar traffic. <br />This traffic must fly a considerable distance westward to pick up the WNDSR arrival and then <br />subsequently fly eastward again to merge into the OAK arrival procedure. WNDSR lengthens flight <br />paths and reduces efficiency. <br /> <br />The WNDSR TWO procedure requires level or nearly level flight under thrust for over 23 nautical <br />miles at altitudes commonly down to 4000 feet MSL along the East Bay Hills which rise up to 1700 <br />feet MSL. This causes excessive fuel burn and particulate emissions. Further, as the ridgeline under <br />WNDSR TWO rises up to 1700 feet MSL, it also results in dramatically concentrated noise impacts. <br />Moving WNDSR TWO would free airspace for departing OAK and SFO traffic and increases safety <br />by reducing potential conflict with OAK arrivals. Moving WNDSR has additional benefits by <br />allowing SFO departures to adopt fuel efficient and noise mitigating ascent profiles in the future that <br />would not be possible with the restrictions that WNDSR imposes. <br /> <br />WNDSR TWO ARRIVAL—NOISE FORUM REQUESTS: <br /> <br />Long Term <br /> <br />The Forum requests that the current WNDSR TWO flight track be eliminated and the FAA consider <br />options to replace this RNAV to another location that allows for geographically shorter flight paths <br />and quiet, fuel efficient optimized descents into OAK. Moving WNDSR TWO has an additional <br />significant advantage in that it frees airspace so that SFO and OAK departures can eventually use <br />quieter and more fuel efficient continuous climbing procedures. <br /> <br />NEW OAK ARRIVAL PROPOSAL ALTERNATIVE ONE (PREFERRED): <br /> <br />The Forum requests the FAA consider establishing the preferred alternative of an OAK arrival <br />RNAV from the Mendocino VOR direct to the Santa Rosa VOR direct RAGGS fix then airway <br />V494 to EMBER towards the SHARR fix and joining the MADWIN SIX arrival or direct <br />BANND/TOOOL waypoints for joining the OAKES TWO arrival (See Figures 8, 9 and 10). <br />Crossover from the PYE navaid routing to the east towards SHARR or BANND/TOOOL waypoints <br />can be accomplished further north in Oakland Center’s airspace at their discretion. This routing will <br />likely shorten flight time and flightpaths of arriving traffic from the north by eliminating the current <br />deflection to the west to achieve BOYSS waypoint. Consider appropriate adjustments to avoid <br />population centers such as Manteca and Sunol. <br /> <br />207