Minnesota Department of Transportation

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Construction Tools, Contract Changes

Methods used to modify construction contacts

Orange barrels on a highway

Contract Change Methods

Check the Contract Changes Section of the Contract Administration Manual for design-build project changes, check design-build guidelines.

See the Contract Changes Decision Tree


Contract Changes Review and Submittal

Send completed Contract Changes Submittal Checklist and Contract Change Documents to ContractChanges-Enc@state.mn.us.

Construction Cost Support

Send Equipment Rate Approval worksheet and information for negotiated price approvals to: ContractChanges-Enc@state.mn.us.

Supplemental Agreement (SA)

SAs document:

  • Design or Contract Specification changes.
  • Major Design or Contract Specification errors/ambituities
  • Any extra work valued at $50,000 or more
  • Changes to Contract Time, including Change in start date, Change in completion date, and number of working days allowed.

Work Order - Minor Extra Work (WO-MEW)

A WO-MEW is allowed for extra work, needed to complete the contract as let, which has a value less than $50,000.

Change Order (CO)

COs document adjustments or minor plan changes allowed by Contract Specifications:

  • Unacceptable work (1512)
  • Revision of measurement method (1901.11)
  • Waiver of liquidated damages (1807.2)
  • Incentives/disincentives
  • Other payments specified in contract