GENERAL PERFORMANCE STANDARDS
1. | Manufactured home parks | 2 per dwelling unit | |
2. | Community uses: | ||
Auditoriums, stadiums, places of worship, places of assembly, or theaters: | |||
Fixed seating | 1 per 4 seats | ||
No fixed seating | 1 per 150 square feet | ||
Child care centers, preschools, and Head Start facilities | 1 per 350 square feet | ||
Hospitals | 1 per each bed | ||
Libraries | 1 per 250 square feet | ||
Nursing homes | 1 per 5 beds | ||
Parks or athletic fields | 30 spaces, and 50 per each playing field | ||
Public safety facilities, public service facilities, and public utility complex facilities with regular on-site employees | 1 for every 2 employees on the largest shift | ||
Schools or higher educational facilities | 1 per classroom, 1 per office, and 1 per each 4 seats in the largest gathering room | ||
3. | Commercial: | ||
Furniture or motor vehicle showrooms | 1 per 800 square feet | ||
Hotels or motels | 1 per rental unit, and 1 per each regular employee of the largest shift | ||
Indoor recreation, such as bowling alleys or skating rinks | 1 per 100 square feet | ||
Medical or dental clinics | 1 per 250 square feet | ||
Offices | 3 per 1,000 square feet | ||
Outdoor recreation activities (depending upon the activity) | 1 per every cabin; or | ||
1 per every equestrian stall; or | |||
1 per every 100 square feet of floor space in the primary lodge or club; or | |||
1 per every 4 tickets sold | |||
Research parks | 1 per 600 square feet | ||
Restaurants, nightclubs or bars | 1 per 250 square feet | ||
Retail sales or personal services | 1 per 250 square feet | ||
Utility complexes, utility services and wireless communication facilities | None | ||
4. | Industrial: | ||
Manufacturing | 1 for every 2 employees on the largest shift | ||
Mining | 1 for every 2 employees on the largest shift | ||
Warehouse or wholesale facility | 1 per 800 square feet | ||
5. | Utilities: For utility installations (including utility complexes and public utility complex facilities) without regular on-site employees, a circulation plan shall be included with an application for a permit, but no permanent parking facilities shall be required | ||
6. | Commercial marinas: Commercial marinas, as defined by the Idaho Department of Lands in IDAPA 20.03.04, must provide a minimum of upland vehicle parking equivalent to 1 parking space per 2 public watercraft or float home moorages. If private moorage is tied to specific parking spaces or designated parking areas, then 1 parking space per 1 private watercraft or float home moorage shall be provided | ||
Aisle Width | Parking Angle | ||||
0° | 30° | 45° | 60° | 90° | |
One-way traffic | 13' | 12' | 15' | 18' | 24' |
Two-way traffic | 19' | 20' | 21' | 23' | 24' |


Speed Limit | Number Of Traffic Lanes | Maximum Area Of Sign Face1 | Maximum Sign Height2 |
Speed Limit | Number Of Traffic Lanes | Maximum Area Of Sign Face1 | Maximum Sign Height2 |
25 mph or lower | 2 - 3 | 25 sq. ft. | 12 feet |
4 or more | 32 sq. ft. | ||
30 - 35 mph | 2 - 3 | 32 sq. ft. | 20 feet |
4 or more | 42 sq. ft. | ||
40 - 50 mph | 2 - 3 | 75 sq. ft. | 35 feet |
4 or more | 90 sq. ft. | ||
55 mph or higher | 2 - 3 | 150 sq. ft. | 40 feet |
4 or more | 200 sq. ft. | ||
Speed Limit | Type Of Sign | Maximum Area Of Sign Face1 | Maximum Sign Height2 |
45 mph or lower | Monument | 16 sq. ft. | 6 feet |
Pole | 10 sq. ft. | ||
50 mph or higher | Monument | 32 sq. ft. | 6 feet |
50 - 55 mph | Pole | 16 sq. ft. | 8 feet |
60 mph or higher | Pole | 32 sq. ft. | 12 feet |
Octave Band Center Frequency (Cycles Per Second) | Column 1 | Column 2 | Column 3 |
Octave Band Center Frequency (Cycles Per Second) | Column 1 | Column 2 | Column 3 |
31.5 | 97 | 90 | 83 |
63 | 87 | 77 | 68 |
125 | 78 | 68 | 58 |
250 | 73 | 63 | 52 |
500 | 69 | 58 | 47 |
1,000 | 65 | 55 | 44 |
2,000 | 63 | 50 | 39 |
4,000 | 60 | 48 | 37 |
8,000 | 57 | 46 | 35 |
Impact noise (overall) | 97 | 90 | 83 |
Octave Band Center Frequency (Cycles Per Second) | Column 1 | Column 2 | Column 3 |
Octave Band Center Frequency (Cycles Per Second) | Column 1 | Column 2 | Column 3 |
37.5 - 75 | 89 | 82 | 75 |
75 - 150 | 81 | 71 | 62 |
150 - 300 | 74 | 64 | 54 |
300 - 600 | 69 | 59 | 48 |
600 - 1,200 | 66 | 55 | 44 |
1,200 - 2,400 | 63 | 53 | 42 |
2,400 - 4,800 | 62 | 49 | 38 |
4,800 - 9,600 | 59 | 47 | 36 |
.0001K |
F |
Where: | ||
F |
= |
The vibration frequency in cycles per second, and |
K |
= |
15 for measurements made within the industrial zone at any point on or beyond the plant property line, or |
K |
= |
3 for measurements made in any residential area outside an industrial zone. |
GENERAL PERFORMANCE STANDARDS
1. | Manufactured home parks | 2 per dwelling unit | |
2. | Community uses: | ||
Auditoriums, stadiums, places of worship, places of assembly, or theaters: | |||
Fixed seating | 1 per 4 seats | ||
No fixed seating | 1 per 150 square feet | ||
Child care centers, preschools, and Head Start facilities | 1 per 350 square feet | ||
Hospitals | 1 per each bed | ||
Libraries | 1 per 250 square feet | ||
Nursing homes | 1 per 5 beds | ||
Parks or athletic fields | 30 spaces, and 50 per each playing field | ||
Public safety facilities, public service facilities, and public utility complex facilities with regular on-site employees | 1 for every 2 employees on the largest shift | ||
Schools or higher educational facilities | 1 per classroom, 1 per office, and 1 per each 4 seats in the largest gathering room | ||
3. | Commercial: | ||
Furniture or motor vehicle showrooms | 1 per 800 square feet | ||
Hotels or motels | 1 per rental unit, and 1 per each regular employee of the largest shift | ||
Indoor recreation, such as bowling alleys or skating rinks | 1 per 100 square feet | ||
Medical or dental clinics | 1 per 250 square feet | ||
Offices | 3 per 1,000 square feet | ||
Outdoor recreation activities (depending upon the activity) | 1 per every cabin; or | ||
1 per every equestrian stall; or | |||
1 per every 100 square feet of floor space in the primary lodge or club; or | |||
1 per every 4 tickets sold | |||
Research parks | 1 per 600 square feet | ||
Restaurants, nightclubs or bars | 1 per 250 square feet | ||
Retail sales or personal services | 1 per 250 square feet | ||
Utility complexes, utility services and wireless communication facilities | None | ||
4. | Industrial: | ||
Manufacturing | 1 for every 2 employees on the largest shift | ||
Mining | 1 for every 2 employees on the largest shift | ||
Warehouse or wholesale facility | 1 per 800 square feet | ||
5. | Utilities: For utility installations (including utility complexes and public utility complex facilities) without regular on-site employees, a circulation plan shall be included with an application for a permit, but no permanent parking facilities shall be required | ||
6. | Commercial marinas: Commercial marinas, as defined by the Idaho Department of Lands in IDAPA 20.03.04, must provide a minimum of upland vehicle parking equivalent to 1 parking space per 2 public watercraft or float home moorages. If private moorage is tied to specific parking spaces or designated parking areas, then 1 parking space per 1 private watercraft or float home moorage shall be provided | ||
Aisle Width | Parking Angle | ||||
0° | 30° | 45° | 60° | 90° | |
One-way traffic | 13' | 12' | 15' | 18' | 24' |
Two-way traffic | 19' | 20' | 21' | 23' | 24' |


Speed Limit | Number Of Traffic Lanes | Maximum Area Of Sign Face1 | Maximum Sign Height2 |
Speed Limit | Number Of Traffic Lanes | Maximum Area Of Sign Face1 | Maximum Sign Height2 |
25 mph or lower | 2 - 3 | 25 sq. ft. | 12 feet |
4 or more | 32 sq. ft. | ||
30 - 35 mph | 2 - 3 | 32 sq. ft. | 20 feet |
4 or more | 42 sq. ft. | ||
40 - 50 mph | 2 - 3 | 75 sq. ft. | 35 feet |
4 or more | 90 sq. ft. | ||
55 mph or higher | 2 - 3 | 150 sq. ft. | 40 feet |
4 or more | 200 sq. ft. | ||
Speed Limit | Type Of Sign | Maximum Area Of Sign Face1 | Maximum Sign Height2 |
45 mph or lower | Monument | 16 sq. ft. | 6 feet |
Pole | 10 sq. ft. | ||
50 mph or higher | Monument | 32 sq. ft. | 6 feet |
50 - 55 mph | Pole | 16 sq. ft. | 8 feet |
60 mph or higher | Pole | 32 sq. ft. | 12 feet |
Octave Band Center Frequency (Cycles Per Second) | Column 1 | Column 2 | Column 3 |
Octave Band Center Frequency (Cycles Per Second) | Column 1 | Column 2 | Column 3 |
31.5 | 97 | 90 | 83 |
63 | 87 | 77 | 68 |
125 | 78 | 68 | 58 |
250 | 73 | 63 | 52 |
500 | 69 | 58 | 47 |
1,000 | 65 | 55 | 44 |
2,000 | 63 | 50 | 39 |
4,000 | 60 | 48 | 37 |
8,000 | 57 | 46 | 35 |
Impact noise (overall) | 97 | 90 | 83 |
Octave Band Center Frequency (Cycles Per Second) | Column 1 | Column 2 | Column 3 |
Octave Band Center Frequency (Cycles Per Second) | Column 1 | Column 2 | Column 3 |
37.5 - 75 | 89 | 82 | 75 |
75 - 150 | 81 | 71 | 62 |
150 - 300 | 74 | 64 | 54 |
300 - 600 | 69 | 59 | 48 |
600 - 1,200 | 66 | 55 | 44 |
1,200 - 2,400 | 63 | 53 | 42 |
2,400 - 4,800 | 62 | 49 | 38 |
4,800 - 9,600 | 59 | 47 | 36 |
.0001K |
F |
Where: | ||
F |
= |
The vibration frequency in cycles per second, and |
K |
= |
15 for measurements made within the industrial zone at any point on or beyond the plant property line, or |
K |
= |
3 for measurements made in any residential area outside an industrial zone. |