The red lines indicate the location of power lines owned by NV Energy. There is also an indication of where 500 feet from the power lines falls, covering all of the park except for the easternmost edge of the park.
Why is this important?
Nevada Revised Statutes NRS 493.109 makes it a misdemeanor to operate within 500 feet of "a power generating station, plant or substation and any appurtenances thereto, any transmission line that is owned in whole or in part by an electric utility as that term is defined in subsection 6 of NRS 704.187", "without the written consent of the owner of the critical facility".
Note: It does not say without notifying the owner; it says without the written consent of the owner. If you fly here, have that written consent (letter or email) available for law enforcement.
Checklist to fly here:
You got your approval to take off and land from the Henderson Parks and Recreation.
You got your airspace approval from the FAA (class G airspace)
You got your written consent to fly here from NV Energy
You got your written consent to fly here from Henderson Utility Services (Water Department)
Final note:
Flying without a Part 107 certificate or TRUST certificate, not registering your drone, or flying in controlled airspace (or TFR) without authorization is a civil offense, punishable by a fine. Flying near critical facilities "without the written consent of the owner is a criminal offense, punishable by a fine or jail time.