§ 36.51 USEFUL LIFE SCHEDULE.
Asset Class
Useful Life
Asset Class
Useful Life
Land:
NA
   Land
NA
   Land improvements
NA
   Right of way
NA
   Easement
NA
Buildings:
 
   Permanent structures
50
   Wood frame structures
25
   Foundation, frame, floor structure
50
   Interior construction
15
   HVAC systems/fire alarms
20
   Floor covering
15
   Carpet
5
   Electrical
20
   Plumbing
20
   Elevators
20
   Masonry interior/exterior construction
10
   Wood frame open structure (i.e. park shelter)
30
   Metal frame open structure
50
   Roof
10
Improvements other than buildings:
 
   Parking lots
50
   Street lights/traffic lights/flag pole
25
   Fencing
20
   Major bridges
50
   Alleys
50
   Outside irrigation systems
25
   Fountains
20
   Tunnel
50
   Roads
50
   Signs
10
   Airport runways/taxiways
25
Infrastructure:
 
   Sewer (including manhole and pipes)
100
   Lift station/gas station
50
   Treatment plants
50
   Pumps
20
   Storm drains
50
   Storm infrastructure
50
Machinery and equipment:
 
   Heavy mobile equipment
12
   Fire apparatus
12
   Fire equipment
10
   General equipment
12
   Athletic/exercise equipment
10
   Indoor recreation equipment
10
   AV equipment
7
   Computer hardware
5
   Copies
5
Machinery and equipment (Cont’d):
 
   Communication equipment
10
   Servers
7
   Furniture
15
   Appliances/food service equipment
10
   General shop equipment
20
   General tools
10
   Trailers
12
   Mowers
7
   Storm sirens
20
Vehicles (licensed):
 
   Automobile
6
   Golf cart
6
   ATV
6
 
(Res. 2020-4, passed 9-22-2020)