Which wage determination applies to my project in Union County?

The wage determination incorporated into your contract is the one that governs, per 29 CFR 1.6. For new heavy work in Union County, SD, the current active determination is SD20260001. Verify with your contracting officer before bidding or paying.

How often do these rates change?

DOL publishes wage determination modifications weekly, generally on Fridays. The determination behind this page was last modified July 30, 2026.

What is the difference between the base rate and the fringe rate?

The base rate is the minimum hourly wage; the fringe amount is an additional hourly benefit obligation you can meet with bona fide benefit contributions or pay in cash. On this schedule the median fringe is about 0% of base.

My classification is not listed for Union County. What do I do?

If the work classification you need is not on the determination, the contractor requests a conformance (additional classification and rate) through the contracting agency using Standard Form 1444. Do not substitute a similar-sounding classification.

What counts as heavy construction?

Heavy covers projects that are not building, residential, or highway, such as water and sewer lines, dams, and flood control. Agencies sometimes split it further; the contract states which schedule applies.

Does the federal rate or the South Dakota state prevailing wage apply?

They are separate systems. Davis-Bacon rates apply to federally funded or assisted work; a state prevailing wage law can apply to state-funded work. A project can be covered by both, in which case the higher rate for each classification effectively controls. This page shows the federal determination only.

Is the WH-347 form mandatory?

The WH-347 itself is optional; what is mandatory on covered work is submitting weekly certified payroll with the same information and a signed Statement of Compliance. Most contractors use the WH-347 layout because agencies expect it.

PREVAILWAGE

Pulling the rate table…

Heavy prevailing wage rates for Union County, SD | PrevailWage

Heavy prevailing wage rates for Union County, SD

DOL marked wage determination SD20260001 modified July 30, 2026 (revision 3). Verify against the source below before filing.

Rates on this page changed recently: the governing determination carries a modification dated July 30, 2026. The active federal wage determination covering heavy construction in Union County, SD lists 16 classifications with published rates, base pay from $26.93 to $35.43 per hour. The determination was last modified July 30, 2026.

Classifications: 16; with published rates
Median base: $29.91; per hour
Median fringe: 0%; of base pay
Last modified: July 30, 2026

Published rates

Classification	Base	Fringe	WD
ELECTRICIAN	$35.43	$8.69	SD20260001
IRONWORKERGroup 1 - Position and secure steel bars or mesh in concrete for reinforcement, steel tyers, saw. Carrying, placing, tying, reinforcing steel under supervision, cutting. Placing steel or prefabricated reinforcement assembly for placement in concrete forms.	$26.93	$0.00	SD20260001
IRONWORKERGroup 2 - Erect, place and join steel girders, columns, structural framework, air wrenches, spud bars, grinders, drills, sledgehammers, tag lines, plumb bobs, lasers, levels, bolts, wire, welds, shears, rod-bending machines	$28.97	$0.00

The highest published base on this schedule belongs to ELECTRICIAN at $35.43 per hour plus $8.69 fringe; the schedule's median base is $29.91.

The governing determination was modified July 30, 2026, within the last 30 days. Contractors mid-bid in Union County should re-check figures against the determination text before submitting.

Most rate lines here carry SU or state-adopted identifiers, meaning they come from wage surveys rather than negotiated agreements. Survey rates change less often but can jump when a new survey publishes.

Using these rates

Read the modification number

A wage determination is cited as number plus modification, for example SD20260001 Mod dated July 30, 2026. Your certified payroll should reflect the determination in your contract, not necessarily the newest one.

Put the WD in your bid file

Save the full determination text with your bid papers the day you price the job. If rates change later, the contract determination is your record of what you bid against.

Check rates the Friday before payroll

DOL publishes modifications weekly, generally Fridays. A quick check before running payroll catches a mid-project modification before it shows up in an agency review instead.

Match classifications by duties, not titles

The classification that applies is determined by the work performed, not the worker's title. A foreman who works with the tools is generally due the rate for the hours on the tools.

Statement of Compliance wording

The signed Statement of Compliance may be the WH-347 back page or another document with identical wording. The signature is a federal certification by your company's officer; accuracy is on the certifier.

Use last-4 SSN only

Certified payroll uses the employee's name and an individually identifying number, normally the last four digits of the Social Security number. Full SSNs do not belong on submitted payrolls.

Questions

Which wage determination applies to my project in Union County?: The wage determination incorporated into your contract is the one that governs, per 29 CFR 1.6. For new heavy work in Union County, SD, the current active determination is SD20260001. Verify with your contracting officer before bidding or paying.
How often do these rates change?: DOL publishes wage determination modifications weekly, generally on Fridays. The determination behind this page was last modified July 30, 2026.
What is the difference between the base rate and the fringe rate?: The base rate is the minimum hourly wage; the fringe amount is an additional hourly benefit obligation you can meet with bona fide benefit contributions or pay in cash. On this schedule the median fringe is about 0% of base.
My classification is not listed for Union County. What do I do?: If the work classification you need is not on the determination, the contractor requests a conformance (additional classification and rate) through the contracting agency using Standard Form 1444. Do not substitute a similar-sounding classification.
What counts as heavy construction?: Heavy covers projects that are not building, residential, or highway, such as water and sewer lines, dams, and flood control. Agencies sometimes split it further; the contract states which schedule applies.
Does the federal rate or the South Dakota state prevailing wage apply?

Sources

SD20260001 rev. 3 · modified July 30, 2026

Synced from SAM.gov August 1, 2026. The wage determination incorporated into your contract is the legally operative document.