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Home My WebLink About01 J_Aerial_Utility_Clearance_Memo_260403_v1 520 Kirkland Way, Suite 100, Kirkland, WA 98033 (425) 889-6747 www.tenw.com MEMORANDUM DATE: April 3, 2026 TO: City of Renton FROM: Stella Oh, P.E. TENW SUBJECT: Proposed Streetlight Clearances to Existing Aerial Utilities Project Name: Wang Short Plat TENW Project No. 2026-064 Overview This memorandum has been prepared in response to the City of Renton’s request to verify that the existing aerial transmission and fiber communication line clearances are acceptable relative to the proposed streetlight poles along 116th Ave SE associated with the Wang Short Plat. WAC and NESC Guidelines Aerial Transmission Line Clearance: TENW has confirmed with Puget Sound Energy (PSE) that the required clearance between existing aerial transmission lines and structures along 116th Ave SE is up to 20 ft, with a minimum working clearance of 15 ft. Applicable minimum clearance requirements are outlined in Washington Administrative Code (WAC) Sections 296-155-53408 and 296-155-428. Fiber Communication Line Clearance: Although fiber communication lines do not carry electrical current and are not subject to the same clearance requirements as energized conductors, the National Electrical Safety Code (NESC) provides guidance for comparable configurations: Description Required Clearance NESC Rule Comm to grounded luminaire bracket/span wire 4 inches min. 238C Comm to street light drip loops 12 inches min. 238D Proposed Clearances The following table summarizes the measured clearances between existing aerial utilities and the proposed streetlight poles: Pole Description Transmission Clearance Fiber Clearance Pole 1: 40-ft Dual Standard 23.4-ft 3.7-ft Pole F: 18-ft Pedestrian Standard 45.6-ft 4.0-ft Pole 2: 40-ft Dual Standard 27.0-ft 8.5-ft Overhead Clearance Memorandum Wang Short Plat (Renton) April 3, 2026 Refer to Exhibit C for graphical representations of the proposed streetlight poles and associated aerial utility clearances. Conclusion As shown in Exhibit C, the clearances between the existing aerial transmission and fiber communication lines and the three proposed streetlight poles along 116th Ave SE meet or exceed the requirements established by PSE, WAC, and NESC. Please feel free to contact me at stella@tenw.com or (206) 412-6743 if there are any questions related to this memorandum. Attachments: Exhibit A: Email from Matt Maynard (PSE) Exhibit B: WAC Section 296-155-53408, Table 4 - Minimum Clearance Distances Exhibit C: Overhead Clearance Figures (3 total) Overhead Clearance Memorandum Wang Short Plat (Renton) April 3, 2026 Exhibit A Email from Matt Maynard (PSE) 1 Glen DuBreuil From:Maynard, James <Matt.Maynard@pse.com> Sent:Thursday, April 2, 2026 2:03 PM To:WILLYNEWHART Cc:Glen DuBreuil; Stella Oh; Daniel Bernik; Elyse Stemmler; Hammons, Michael Subject:RE: RE: Wang Short Plat | Overhead Transmission Voltage (116th Ave SE) All, I hope this information helps. Sorry for the delay on getting back to you. I will be on vacation this Friday thru next week. I got my co-worker Mike on this email. He may be able to assist you while I’m gone if you need anything. ~15’ working clearance, 15’-20’ structure. There are different variables but refer to WAC- Working near high-voltage power lines in Washington state requires adherence to strict safety clearances established by the Washington Administrative Code (WAC) to prevent electrocution, with a general minimum clearance of 10 feet for voltages up to 50 kV. For higher voltages, the clearance must be increased by 0.4 inches for each 1 kV over 50 kV, or as specified by federal regulations. Key requirements for working near overhead lines, particularly for crane and construction operations (WAC 296-155-428 and WAC 296-155-53408) Thanks! Matt Maynard Account Manager Pole Services Puget Sound Energy BOTO20 PO Box 97034 Bellevue, WA 98009 Phone Number: 425-628-7701 matt.maynard@pse.com From: WILLYNEWHART <WILLYNEWHART@comcast.net> Sent: Wednesday, April 1, 2026 6:38 PM To: Maynard, James <Matt.Maynard@pse.com> Cc: Glen DuBreuil <dubreuil@tenw.com>; Stella Oh <stella@tenw.com>; Daniel Bernik <bernik@tenw.com>; Elyse Stemmler <elyse@tenw.com> Subject: FW: RE: Wang Short Plat | Overhead Transmission Voltage (116th Ave SE) CAUTION - EXTERNAL EMAIL Phishing? Click the PhishAlarm "Report Phish" button. Matt, Overhead Clearance Memorandum Wang Short Plat (Renton) April 3, 2026 Exhibit A Washington Administrative Code Section 296-155-53408 – Table 4 Minimum Clearance Distances (6) For power lines over 1000 kV, the minimum clearance distance must be established by the(6) For power lines over 1000 kV, the minimum clearance distance must be established by the utility owner/operator or a RPE who is a qualified person with respect to power transmission andutility owner/operator or a RPE who is a qualified person with respect to power transmission and distribution.distribution. Table 4: Minimum Clearance DistancesTable 4: Minimum Clearance Distances VoltageVoltage (nominal, kV)(nominal, kV) Minimum clearanceMinimum clearance distance (feet)distance (feet) up to 50up to 50 . . . . . . . . . . . . . . . . . . . . . . . . . 10. . . . . . . . . . . . . . . . . . . . . . . . . 10 over 50 to 200over 50 to 200 . . . . . . . . . . . . . . . . . . . . . . . . . 15. . . . . . . . . . . . . . . . . . . . . . . . . 15 over 200 to 350over 200 to 350 . . . . . . . . . . . . . . . . . . . . . . . . . 20. . . . . . . . . . . . . . . . . . . . . . . . . 20 over 350 to 500over 350 to 500 . . . . . . . . . . . . . . . . . . . . . . . . . 25. . . . . . . . . . . . . . . . . . . . . . . . . 25 over 500 to 750over 500 to 750 . . . . . . . . . . . . . . . . . . . . . . . . . 35. . . . . . . . . . . . . . . . . . . . . . . . . 35 over 750 to 1,000over 750 to 1,000 . . . . . . . . . . . . . . . . . . . . . . . . . 45. . . . . . . . . . . . . . . . . . . . . . . . . 45 over 1,000over 1,000 . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . (as established by the utility owner/(as established by the utility owner/ operator or RPE who is a qualified personoperator or RPE who is a qualified person with respect to electrical powerwith respect to electrical power transmission and distribution).transmission and distribution). Note:Note:The value that follows "to" is up to and includes thatThe value that follows "to" is up to and includes that value.value. Table 5: Minimum Clearance Distances While Traveling With No Load and Boom/Mast LoweredTable 5: Minimum Clearance Distances While Traveling With No Load and Boom/Mast Lowered Voltage (nominal,Voltage (nominal, kV)kV) While traveling—While traveling— Minimum clearanceMinimum clearance distance (feet)distance (feet) up to 0.75up to 0.75 . . . . . . . . . . . . . . . . . . . . . . . . . 4. . . . . . . . . . . . . . . . . . . . . . . . . 4 (while traveling/boom lowered)(while traveling/boom lowered) over 0.75 to 50over 0.75 to 50 . . . . . . . . . . . . . . . . . . . . . . . . . 6. . . . . . . . . . . . . . . . . . . . . . . . . 6 (while traveling/boom lowered)(while traveling/boom lowered) over 50 to 350over 50 to 350 . . . . . . . . . . . . . . . . . . . . . . . . . 10. . . . . . . . . . . . . . . . . . . . . . . . . 10 (while traveling/boom lowered)(while traveling/boom lowered) over 350 to 750over 350 to 750 . . . . . . . . . . . . . . . . . . . . . . . . . 16. . . . . . . . . . . . . . . . . . . . . . . . . 16 (while traveling/boom lowered)(while traveling/boom lowered) over 750 to 1,000over 750 to 1,000 . . . . . . . . . . . . . . . . . . . . . . . . . 20. . . . . . . . . . . . . . . . . . . . . . . . . 20 (while traveling/boom lowered)(while traveling/boom lowered) over 1,000over 1,000 . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . (as established by the utility owner/(as established by the utility owner/ operator or RPE who is a qualifiedoperator or RPE who is a qualified person with respect to electrical powerperson with respect to electrical power transmission and distribution).transmission and distribution). [Statutory Authority: RCW [Statutory Authority: RCW 49.17.01049.17.010, , 49.17.04049.17.040, , 49.17.05049.17.050, , 49.17.06049.17.060, and chapter , and chapter 49.1749.17 RCW. WSR RCW. WSR 25-16-089, s 296-155-53408, filed 8/5/25, effective 9/5/25. Statutory Authority: RCW 25-16-089, s 296-155-53408, filed 8/5/25, effective 9/5/25. Statutory Authority: RCW 49.17.01049.17.010,, 49.17.04049.17.040, , 49.17.05049.17.050, , 49.17.06049.17.060. WSR 16-09-085, § 296-155-53408, filed 4/19/16, effective 5/20/16.. WSR 16-09-085, § 296-155-53408, filed 4/19/16, effective 5/20/16. Statutory Authority: RCW Statutory Authority: RCW 49.17.01049.17.010, , 49.17.04049.17.040, , 49.17.05049.17.050, , 49.17.06049.17.060 and chapter and chapter 49.1749.17 RCW, and 29 RCW, and 29 C.F.R. 1926, Subpart CC. WSR 13-02-068, § 296-155-53408, filed 12/31/12, effective 2/1/13. StatutoryC.F.R. 1926, Subpart CC. WSR 13-02-068, § 296-155-53408, filed 12/31/12, effective 2/1/13. Statutory Authority: RCW Authority: RCW 49.17.01049.17.010, , 49.17.04049.17.040, , 49.17.05049.17.050, , 49.17.44049.17.440, , 49.17.06049.17.060, and 29 C.F.R. 1926, Subpart CC., and 29 C.F.R. 1926, Subpart CC. WSR 12-01-086, § 296-155-53408, filed 12/20/11, effective 2/1/12.]WSR 12-01-086, § 296-155-53408, filed 12/20/11, effective 2/1/12.] WAC 296-155-53408: https://app.leg.wa.gov/wac/default.aspx?cite=296-155-53408 8 of 8 3/12/2026, 4:03 PM Overhead Clearance Memorandum Wang Short Plat (Renton) April 3, 2026 Exhibit C Overhead Clearance Figures (3 Total) CM CM CM CM CM CM OH P OH P OH P OH P OH P OH P OH P OH P OH P OH P OH P OH P OVERHEAD POWER CLEARANCES LIGHT POLE '1' DATE:SHEET OF 1 3 04/03/2026 WANG SHORT PLAT RENTON, WASHINGTON 20.,5./A1D:A<68,TE00.,5./A1D:A033 PRELIMINARY - FOR DISCUSSION ONLY 0 10 VERTICAL SCALE IN FEET HORIZONTAL SCALE IN FEET 0 10 OH P OH P OH P OH P OH P OH P OH P CM CM CM CM CM CMOH P OH P OH P OH P OH P 0 10 VERTICAL SCALE IN FEET HORIZONTAL SCALE IN FEET OVERHEAD POWER CLEARANCES LIGHT POLE 'F' DATE:SHEET OF 2 3 04/03/2026 WANG SHORT PLAT RENTON, WASHINGTON 20.,5./A1D:A<68,TE00.,5./A1D:A033 PRELIMINARY - FOR DISCUSSION ONLY 0 10 OH P OH P OH P OH P OH P OH P OH P OH P OH P OH P OH P OH P CM CM CM CM CM CM 0 10 VERTICAL SCALE IN FEET HORIZONTAL SCALE IN FEET OVERHEAD POWER CLEARANCES LIGHT POLE '2' DATE:SHEET OF 3 3 04/03/2026 WANG SHORT PLAT RENTON, WASHINGTON 20.,5./A1D:A<68,TE00.,5./A1D:A033 PRELIMINARY - FOR DISCUSSION ONLY 0 10