Type of Use | note | RA | R-1 | MF-1 | MH-1 | MH-2 | B-1 | B-2 | THOR | I-1 | I-2 | FH |
Type of Use | note | RA | R-1 | MF-1 | MH-1 | MH-2 | B-1 | B-2 | THOR | I-1 | I-2 | FH |
Airport, landing field | 4a | S | S | S | S | |||||||
Antenna and support structure, amateur radio (1) | 4b | S | S | S | S | S | Y | Y | Y | Y | Y | |
Bus terminal | 4c | Y | Y | Y | S | S | ||||||
Communications tower (1) | 4d | S | S | S | S | S | S | |||||
Electric power generating plant (2) | S | S | Y | Y | ||||||||
Electrical substation (2) | 4e | S | S | S | S | S | S | S | S | Y | Y | |
Electrical transmission line (also see local utility...) | S | S | S | S | S | S | S | S | S | S | S | |
Gas metering station | 4f | S | S | S | S | S | S | S | S | Y | Y | S |
Gas transmission line (also see local utility) | S | S | S | S | S | S | S | S | ||||
Heliport or heliatop | 4g | S | S | S | Y | Y | ||||||
Landfill | S | |||||||||||
Liquified petroleum gas, storage and safe (no bulk plants) | S | |||||||||||
Local utility distribution lines | 1i | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
Radio, TV or microwave operation, amateur (1) | 4h | S | S | S | S | S | Y | Y | Y | Y | Y | |
Radio, TV or microwave operation, commercial (1) | 4i | S | Y | Y | Y | Y | Y | |||||
Railroad facility (excluding passenger station) | 4k | S | S | S | Y | Y | ||||||
Railroad freight terminal | 4l | Y | Y | |||||||||
Railroad station | 4m | Y | Y | Y | Y | Y | ||||||
Railroad track and right-of-way | 4n | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
Service yards of public entity (2) | 4p | S | S | S | S | S | S | Y | Y | Y | Y | |
Service yards of private entity (2) | 4q | S | Y | S | Y | Y | ||||||
Sewage pumping station (2) | S | S | S | S | S | S | S | Y | ||||
Sewage treatment plant (2) | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | |
Solid waste transfer station | 4r | S | S | S | S | S | ||||||
Taxi-cab service | Y | Y | Y | Y | Y | |||||||
Transit station or turnaround | S | S | S | S | S | Y | Y | Y | Y | Y | ||
Water pumping station or well (2) | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | |
Water storage, elevated or ground (2) | S | S | S | S | S | Y | Y | Y | Y | Y | Y | |
Water treatment plant (2) | S | S | S | S | S | S | S | S | S | S | Y | |
(1) See § 155.224 for additional regulations (2) See § 155.221 for additional regulations | ||||||||||||