Rock Industries, INC.

What they make

• machining services
• heat treating

NAMED ON THE COMPANY’S OWN WEBSITE, READ JUL 29, 2026

Where it is

Other plants nearby

Facility	City	Industry	Status	Distance
SMSiouxland Machine, Inc	Rock Valley	Machine Shops 332710	◐ LIKELY ACTIVE	0.8 KM
MPMidwest Pro Manufacturing INC.	Rock Valley	Machine Shops 332710	◐ LIKELY ACTIVE	1.1 KM
TCTotal Component Solutions	Rock Valley	Precision Turned Product Manufacturing 332721	◐ LIKELY ACTIVE	1.6 KM
Valley Machining CO	Rock Valley	Machine Shops 332710	● ACTIVE	1.9 KM
KCKooima CO	Rock Valley	Fabricated Structural Metal Manufacturing 332312	◐ LIKELY ACTIVE	3.2 KM

Every listed plant in Sioux County

Also at this address

No other federal record shares this street address.

Where this record comes from

5 sources hold this plant, and 14 fields on this page come from them. Each line is one agency’s own record of it: the identifier it is filed under, whether that record shows the plant operating or only that it exists, and when the register first and last saw it there.

EPA cross-references this facility in AIR, AIRS/AFS, IDNR_EFD, RCRAINFO · EPA site type STATIONARY.

• The company’s own websiteOPERATING
  first seen JUL 2026 · last seen OCT 2026
• SAM.gov entity registrationOPERATING
  Record MSDSX6CV86W7 · first seen OCT 2025 · last seen SEP 2026
• DOL Form 5500 retirement plan filingsOPERATING
  Record 421411478|IA|51247|880 10th st · first seen DEC 2024 · last seen DEC 2024
• SBA Paycheck Protection Program loan recordsEXISTENCE
  Record IA|rock valley|880 10th st · first seen JAN 2021 · last seen JAN 2021
• EPA Facility Registry ServiceEXISTENCE
  Record 110012169401 · first seen JUN 2015 · last seen JUN 2015

IN SIOUX COUNTY6 other plants share this one’s industry (Machine Shops; Turned Product; and Screw, Nut, and Bolt Manufacturing, NAICS 3327); 5 of them have a size band on record.

What each source says

Every field below, as each source filed it. The value this page shows is marked; where the sources disagree, the field says so. Status is computed from independent sources; nothing here is self-reported unless marked Claimed.

Name

EPA: ROCK INDUSTRIES INC · JUL 2026 · ON THIS PAGE

SAM.gov: ROCK INDUSTRIES, INC. · SEP 2026 · ON THIS PAGE

Street addressSOURCES DISAGREE

EPA: 880 10TH STREET · JUL 2026

SAM.gov: 880 10TH ST · SEP 2026 · ON THIS PAGE

City

EPA: ROCK VALLEY · JUL 2026 · ON THIS PAGE

SAM.gov: ROCK VALLEY · SEP 2026 · ON THIS PAGE

State

EPA: IA · JUL 2026 · ON THIS PAGE

SAM.gov: IA · SEP 2026 · ON THIS PAGE

County (FIPS code)

EPA: 19167 · SEP 2026

Coordinates

EPA: 43.19995,-96.306105 · JUL 2026

Employees (band)

DOL: 20-99 · DEC 2024

Website

Company website: http://www.rockmachining.com · JUL 2026 · ON THIS PAGE

SAM.gov: http://www.rockmachining.com · SEP 2026 · ON THIS PAGE

Year established

Company website: 1993 · AUG 2026

CAGE code

SAM.gov: 46F10 · SEP 2026

Retirement plan filing (Form 5500)

DOL: 29 active participants, plan year ending 2024-12-31, 1 plan(s) · DEC 2024

PPP loan

SBA PPP: PPP loan x2, approved 2021-01-29, 35 jobs reported · JAN 2021

SAM registration expires

SAM.gov: 2027-09-17 · SEP 2026

State business registration

IA SOS: ROCK INDUSTRIES, INC., registered with the Iowa Secretary of State; formed 1993-10-27; active · OCT 1993