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within the 60 dBA Ldn and greater noise level area may actually have acceptable noise levels <br /> because of the noise reduction buffering effect of other homes, sound walls, berms, etc. located <br /> between those homes and nearby roadways. As discussed in the Noise Element of the General <br /> Plan, existing noise levels in residential areas near major thoroughfares (i.e., 1-680) typically <br /> range from about 60 to 70 dBA Ldn. 3989 Petrified Forest Court (see Image 4), located <br /> approximately 54 feet from 1-680 sound wall, has a noise level of 65-67 dBA Ldn. <br /> !ma s a 4: 3989 Petrified Forest Court <br /> .« Ian''' t y` - .. s �. . <br /> .rte 't,,,„ �`y�.._.�� �- 7 <br /> � .: lN+ •r ye-. . <br /> y ' ✓z <br /> g 3� sir <br /> Ati,' . ' ki ''' '\----- -4 - <br /> • ,,-;:- ------dr› , ,,, - , A • <br /> ,..,„ ...__,. 4 LAN,. --- _' . <br /> tk\tti* :, \ ' ' % 1 f. ' Aer- k ' .0.... --1. .":- <br /> ��y, ': - 4+�, y .6 - R ., yy`, j,,1 \.r W0. 1..- '. <br /> . '‘.1.---_ i '` , S'; r G ti , '..1!‘;,1. ' �. .,-,;" 4,'i <br /> p� 1,.„ s., . ,,,,, -,.: , ,. .:::,, ,,--, „."-,. '!.„---v-,,i.r , , 1.,,,,,...,,z-- ,x-- <br /> - ...:1:2°. VA '' 'ra M " a <br /> -ipf _,,i ev.,,,A noise study was not required, or prepared, for the project site as the sound level would be <br /> lower than the General Plan standards due to intervening buildings, the sound wall and other <br /> sound barriers (e.g., trees). Furthermore, the sound levels at the project site would have a <br /> lower noise level than existing properties immediately adjacent to 1-680, and would meet the <br /> minimum noise thresholds outlined in the General Plan and PMC Noise Ordinance. <br /> The development of the property will generate added urban noise, such as that associated with <br /> traffic and landscape maintenance activities. However, noise levels are not expected to change <br /> substantially from those currently experienced in the area because overall activity levels at the <br /> site would be modest. Ambient noise levels could decrease for some of the adjacent properties <br /> due to the shielding of traffic noise by the proposed buildings. <br /> Short-term construction noise would be generated during construction activities on this site. The <br /> City normally allows construction to occur from 8:00 a.m. to 5:00 p.m., Monday through Friday, <br /> P16-1386. P17-0155, PUD-113, & TRACT 8259; 6900 Valley Trails Drive Planning Commission <br /> 24 of 32 <br />