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F-22 Plus-Up Environmental Assessment - Joint Base Elmendorf ...

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Table 1. Estimated Annual Beluga Behavioral Responses Resulting From Proposed Additional F-<strong>22</strong> Flying Operations<br />

Aircraft<br />

Configuration<br />

Noise Levels<br />

Events<br />

Per<br />

Year<br />

Number of Belugas in Affected<br />

Area<br />

Risk of Behavioral Responses<br />

EEEGL 2 Departure on<br />

RW 24 (military and<br />

A/B power departures<br />

identical at overwater<br />

segment)<br />

EEEGL 2 Departure on<br />

RW 34<br />

IFR Approach (IFR<br />

arrival and IFR closed<br />

pattern are idetical in<br />

overwater segment)<br />

MATSU Transition<br />

(initial approach)<br />

RAPTR Transition<br />

(initial approach)<br />

ALL VFR approaches<br />

(overhead break) AND<br />

visual closed patterns<br />

Re-entry Pattern (initial<br />

approach)<br />

Lowest Altitude Over<br />

Water (MSL)<br />

Power (% ETR)<br />

LAmax Just Above Surface<br />

(dB re 20 µPa)<br />

SPL Just Below Surface<br />

(dB re 1 µPa)<br />

Additional Events Per<br />

Year (Proposed Action)<br />

Area Affected at 120-125<br />

dB SPL (sq km)<br />

Area Affected at 125-130<br />

dB SPL (sq km)<br />

Area Affected at >130 dB<br />

SPL (sq km)<br />

Approx. Beluga Density<br />

(Animals per km 2 )<br />

Prob. of Behavioral<br />

Response at Highest Level<br />

Within 120-125 dB SPL<br />

Prob. of Behavioral<br />

Response At Highest Level<br />

Within 125-130 dB SPL<br />

Response at Highest Level<br />

>130 dB SPL (0 if max SPL<br />

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