Certified Weighers

Public scales are used throughout Colorado. The most common example is a public vehicle scale used to determine the weight of commodities hauled by a truck. Generally, neither the buyer nor the seller owns the scale. A reasonable fee may be charged for this service. Certified weighers are certified through this office.

Certified weighers must keep a daily register of all transactions for at least two years.

Aaron Yanker
Program Administrator


Forms and Downloads

To Become a Certified Weigher

Certified weighers must be familiar with the Measurement Standards Act, particularly Sections 35-14-121 and 35-14-122. Qualifications are described in Measurement Standards Regulation 3.

1. A Certified Weigher Certificate must be renewed annually.

2. If you are currently certified and just renewing you can do so on the AgLicense website. Contact our office to obtain your login credentials.

3. If you are certifying for the first time as a new applicant, please complete and return the following documents:

4. If you are a renewing applicant, please complete and return the following documents:

Weight Certificates

Weights determined over public scales by certified public weighers will be recorded on weight certificates. A weight certificate must state:

  1. The gross, tare and net weights.
  2. Date of weighing.
  3. Positive vehicle identification e.g., license plate number.
  4. Weight certificate serial number.
  5. Name of shipper or owner.
  6. Nature of load.
  7. Name of receiver of load.
  8. Whether the driver is on or off the scale during weighing.
  9. Name of the certified weigher.
  10. Location of the certified scale.

Split Weighing

Split-weighing is not legal in Colorado. All weights (gross, net, tare) must be determined for vehicles that are either entirely on the scale or for combination vehicles that have been separated and weighed as independent units. Combination vehicles that fit entirely on the scale being used may be weighed in one draft.