Utah Admin. Code 930-3-12
Normally, noise walls built pursuant to this rule will be constructed within Department right-of-way and owned and maintained by the Department. There are cases in which Department right-of-way is not the most prudent location for noise barriers, yet noise abatement is still feasible and reasonable if built on adjacent property or adjacent public right-of-way. In these cases:
TABLE 1-UDOT Noise Abatement Criteria (NAC)
(Hourly A-Weighted Sound Level decibels (dB(A)))
Activity Category | UDOT Criteria(1) Leq (h) | Evaluation Location | Activity Description |
A | 56 | Exterior | Lands on which serenity and quiet are of extraordinary significance and serve an important public need and where the preservation of those qualities is essential if the area is to continue to serve its intended purpose. |
B | 66 | Exterior | Residential |
C | 66 | Exterior | Active sports areas, amphitheaters, auditoriums, campgrounds, cemeteries, day care centers, hospitals, libraries, medical facilities, parks, picnic areas, places of worship, playgrounds, public meeting rooms, public or nonprofit institutional structures, radio studios, recording studios, recreation areas, Section 4(f) sites, schools, television studios, trails and trail crossings. |
D | 51 | Interior | Auditoriums, day care centers, hospitals, libraries, medical facilities, places of worship, public meeting rooms, public or nonprofit institutional structures, radio studios, recording studios, schools, and television studios. |
E | 71 | Exterior | Hotels, motels, offices, restaurants/bars, and other developed lands, properties or activities not included in A-D or F. |
F | No Limit | - | Agriculture, airports, bus yards, emergency services, industrial, logging, maintenance facilities, manufacturing, mining, rail yards, retail facilities, shipyards, utilities (water resources, water treatment, electrical), and warehousing. |
G | No Limit | - | Undeveloped lands that are not permitted. |
(1) Hourly A-weighted sound level in decibels reflecting a 1 dBA "approach" value below 23 CFR 772 values. | |||
Utah Admin. Code R930-3-12