HomeMy WebLinkAboutC_Lighting Impingment Response 2_180618_v1.pdf Lighting Impingment Response R1 2018-0615.docx 10604 NE 38th Place, Suite 205, Kirkland, WA 98033  (425) 522-1000  (425) 828-2622 Fax 12730 E. Mirabeau Pkwy, Suite 300, Spokane Valley, WA 99216  (509) 922-7897  (509) 922-1898 Fax 6/15/2018 The Boeing Company 998 Logan Ave N Renton, WA 98057 Attention: Mark Clement Boeing Permit Specialist Subject: 4-87 Mitigation Hangar, Boeing Project # C180242 Lighting Impingement Response – Revision 1 Dear Mr. Clement: In response to the City of Renton’s request to lower the foot-candle levels below the .1 fc shown in our earlier lighting model, we have reviewed several options that could accommodate this request while maintaining a safe level of light for aircraft operations. Design modifications that were considered include adjusting fixture mounting heights, re- aiming of fixtures closer inland, adding fixture cutoffs or shielding, and finally eliminating fixtures. During this process we identified two fixtures that had a direct impact on light levels along the Lake Washington shoreline. By eliminating these two fixtures we could achieve a calculated foot-candle reading of 0.0 fc with an acceptably minimized impact to the area lighting in front of the 4-87 hangar doors. The attached lighting model reflects these results and will be included in the next drawing revision for review. Sincerely, Derek A. Townsend Engineering Project Manager RevisionsDate# CommentsMitigation HangarRenton, WADrawn: C. LinderChecked: D. TownsendPage 1 of 1Date: 06.15.18737-900737-9000.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 1.2 1.3 1.3 0.9 0.9 1.4 2.1 2.3 1.2 1.7 1.5 1.4 0.9 0.8 1.2 1.8 1.8 1.2 1.5 1.3 1.5 0.9 0.7 1.1 1.9 2.1 1.3 1.3 1.5 1.2 0.8 0.8 1.0 1.4 1.4 1.9 0.7 0.3 0.2 4.8 1.3 0.5 0.3 1.0 1.3 1.0 0.5 3.0 3.9 2.0 0.8 10.7 8.6 2.9 1.0 4.1 4.8 2.3 0.9 0.7 1.4 1.2 0.7 0.3 0.8 0.9 0.6 1.0 1.9 1.5 0.8 6.3 6.2 2.5 1.0 9.3 7.9 2.8 1.0 1.9 2.9 1.8 0.8 0.4 0.9 0.9 0.6 0.4 0.9 0.9 0.6 1.8 2.8 1.8 0.8 9.2 7.9 2.8 1.0 6.5 6.3 2.5 0.9 1.8 2.2 1.4 0.7 5.5 1.5 0.7 0.4 1.3 0.7 0.3 0.2 0.4 0.2 0.2 0.1 0.2 0.4 0.6 1.0 1.2 0.7 0.4 0.5 0.8 1.1 0.9 0.3 0.3 0.5 0.7 1.1 1.5 1.6 1.0 0.7 0.9 1.2 1.4 1.0 0.3 0.5 0.7 1.0 1.3 1.4 1.2 0.9 0.8 1.0 1.2 1.0 0.3 0.4 0.6 0.8 0.9 1.0 0.9 0.8 0.7 0.8 0.8 0.7 0.3 0.3 0.5 0.6 0.7 0.7 0.7 0.6 0.5 0.6 0.5 0.4 0.2 0.3 0.3 0.4 0.5 0.5 0.5 0.4 0.4 0.4 0.4 0.3 0.2 0.2 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.2 0.2 Luminaire Schedule Symbol Qty Label LLF Description Lum. Watts Lum. Lumens 2 FXLED300SFN 0.850 Flood Light - 300W 316.1 35087 4 G400PM00LWR 0.200 Existing Pole - 400W 450 29828 10 WPLED52N 0.850 Wall Pack - 52W 58.2 7236 5 WPLED10N 0.850 Wall Pack - 10W 12.2 1208 Calculation Summary Label Units Avg Max Avg/Min Max/Min Hangar North_Ground Fc 2.17 10.7 21.70 107.00 Hangar West_Planar Fc 0.65 1.6 3.25 8.00 South Lot_Ground Fc 1.33 2.3 1.90 3.29