Grades of licenses and limitations
Seattle Mun. Code § 6.420.070
in effect6.420.070 - Grades of licenses and limitations
A. The grades of steam engineer and boiler operator licenses are as follows:
Grade I Boiler Supervisor
Grade II Boiler Supervisor
Grade III Boiler Supervisor
Grade I Steam Engineer
Grade II Steam Engineer
Grade III Steam Engineer
Grade IV Boiler Operator
Small Power Boiler Operator
Grade V Boiler Operator
B. License Limitations. The Director may impose limitations on licenses restricting the licensee to the operation and maintenance of particular equipment at a stated location, or to the operation and maintenance of a certain class of boilers or steam engines, or to specified permitted services in connection with the operation and maintenance of boilers and steam engines. Limitations shall be based upon the applicant's qualifications and shall be reasonably related to the protection of the public in the safe operation and maintenance of boilers and steam engines. Limitations may include, but are not limited to, the following:
1. Operation of boilers only.
2. Operation of electric boilers only.
3. Operation of hot water boilers only.
4. Work at one address only.
C. Applicants for a license shall possess the minimum qualifications for each grade of license as specified in Table A for 6.420.070.
Table A for 6.420.070—Qualifications for Steam Engineer and Boiler Operator Licenses
Grade of License Applied For | Minimum Qualifications
Grade I Boiler Supervisor | At least one year of experience as a Grade I Steam Engineer or Grade II Boiler Supervisor pursuant to the provisions of this Chapter 6.420.
Grade II Boiler Supervisor | At least one year of experience as a Grade II Steam Engineer or Grade III Boiler Supervisor pursuant to the provisions of this Chapter 6.420.
Grade III Boiler Supervisor | At least one year of experience as a Grade III Steam Engineer pursuant to the provisions of this Chapter 6.420.
Grade I Steam Engineer | 1. At least five years of employment in a position directly responsible for the operation of boilers, or 2. Educational substitution for experience as allowed by Section 6.420.080.A, plus three years of experience. Licenses shall be limited to boilers only unless the applicant proves at least one year of experience in the operation of steam engines.
Grade II Steam Engineer | 1. At least four years of employment in a position directly responsible for the operation of boilers, or 2. Educational substitution for experience as allowed by Section 6.420.080.A, plus two years of experience. Licenses shall be limited to boilers only unless the applicant proves at least one year of experience in the operation of steam engines.
Grade III Steam Engineer | 1. At least three years of employment in a position directly responsible for the operation of boilers, or 2. Educational substitution for experience as allowed by Section 6.420.080.A, plus one year of experience. Licenses shall be limited to boilers only unless the applicant proves at least one year of experience in the operation of steam engines.
Grade IV Boiler Operator | 1. At least one year of employment in a position directly responsible for the operation of boilers, or 2. Allowable educational substitution for experience as allowed by Section 6.420.080.A or 6.420.080.B. Licenses shall be limited to boilers only unless the applicant proves at least one year of experience in the operation of steam engines.
Small Power Boiler Operator | No previous experience required.
Grade V Boiler Operator | No previous experience required.
(Ord. 126359, § 1, 2021; Ord. 122115, § 2, 2006.)
Source: City of Seattle, Seattle Municipal Code and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/wa/seattle/codes/municipal_code?nodeId=TIT6BURE_SUBTITLE_IVNELICO_CH6.420STENBOOP_6.420.070GRLILIFetched: 11/1/2026