KNOLL BROTHERS ENTERPRISES LLC
USDOT 3651099 • DBA: RHINEHART EXCAVATING • 28143 240TH ST, DALLAS CENTER, IA, 50063-8281
ACTIVE
Authority:None on file
Insurance:None on file
BOC-3:Not on file
Safety Rating:Not rated
MCS-150:Never updated
OOS Orders:None
Overview
Company profile from FMCSA Census File
USDOT
3,651,099
Status
ACTIVE
Operation
Intrastate (Non-Hazmat)
State
Phone
5159923888
Email
Power Units (MCS-150)
14
Drivers (MCS-150)
12
MCS-150 Mileage
345,000
Physical Address
28143 240TH ST, DALLAS CENTER, IA, 50063-8281
Mailing Address
PO BOX 160, DALLAS CENTER, IA, 50063
Contact
Phone: 5159923888
Email: [email protected]
Authority & Insurance
Operating authority, insurance filings, and BOC-3 status
Active Authority
0
Revoked / Inactive
0
Authority Types
0
Insurance Policies
None on file
BOC-3 Filing
Not on file
Operating Authority
fmcsa-authhistApr 5, 2026
No records found
No insurance filings found for this carrier in FMCSA records.
Safety & Inspections
SMS BASIC scores, inspection history, and out-of-service rates
SMS BASIC Scores
Driver Fitness
0%
Drugs / Alcohol
0%
Hours of Service
0%
Vehicle Maintenance
10%
Higher percentile = worse safety performance relative to peers. Scores at or above 75% trigger FMCSA alerts.
Inspections
13
Violations
17
3 OOS
Vehicle OOS %
15.4%
Driver OOS %
7.7%
Above nat'l avg (6.7%)
Power Units (MCS-150)
14
Drivers (MCS-150)
12
Crash Records
0
Inspection Activity (24 months)
Monthly inspection counts with OOS months highlighted. Hover bars for details.
1
May
Jun
1
Jul
1
Aug
1
Sep
Oct
Nov
1
Dec
1
Jan
Feb
Mar
Apr
May
Jun
Jul
2
Aug
1
Sep
Oct
1
Nov
Dec
Jan
Feb
Mar
Apr
Clean monthMonth with OOSBased on latest 13 of 13 inspection records
Inspection Activity Map
1 state • 13 inspections
None Low Medium High🚛 Home base
Violation Summary (17 violations from 13 inspections)
fmcsa-inspection-file
| Code | Description | # Violations | # OOS | Severity Wt | BASIC |
|---|---|---|---|---|---|
| FMCSR:392.2 | Operating a CMV while ill or fatigued | 5 | 0 | 8 | Unsafe Driving |
| FMCSR:392.2-SLLS2 | Speeding 6-10 mph over limit | 4 | 0 | 5 | Unsafe Driving |
| FMCSR:393.75(a)(3) | Tire-flat and/or audible air leak | 2 | 2 | — | Vehicle Maintenance |
| FMCSR:396.17(c) | No proof of periodic inspection | 2 | 0 | 3 | Vehicle Maintenance |
| FMCSR:392.2-SLLS1 | Speeding 1-5 mph over limit | 1 | 0 | 3 | Unsafe Driving |
| FMCSR:392.2-SLLEWA1 | Operating a CMV while ill or fatigued | 1 | 0 | 8 | Unsafe Driving |
| FMCSR:392.80(a) | Using a hand-held mobile telephone | 1 | 0 | 7 | Unsafe Driving |
| FMCSR:391.11(b)(4) | No valid medical certificate | 1 | 1 | 7 | Driver Fitness |
Peer Context
This carrier vs national averages. Lower is better for all metrics.
Vehicle OOS Rate
15.4%vs nat'l 23.4%
-8.0 pts below avg
Driver OOS Rate
7.7%vs nat'l 6.7%
+1.0 pts above avg
Violations / Inspection
1.31vs nat'l 1.80
-0.49 below avg
National averages: vehicle OOS 23.4%, driver OOS 6.7%, violations per inspection ~1.8. Based on FMCSA MCSAP program data.
Inspection History (13 inspections)
fmcsa-inspectionsApr 5, 2026
Inspection analytics
Monthly cadence, frequent stations, and violation mix
Inspections per month (24 mo)
10 total · 20.0% OOS
2024-052025-11
InspectionsOOS
Most frequent inspection stations
Violations by BASIC category
Related Records
Related records
StateAll entities in Iowa
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CityEntities in DALLAS CENTER, IA
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Crashes0 crash records
FMCSA Crash File
Inspections13 inspection records
Full inspection history
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5 inspections at this station
StationHIGHWAY 69 NB
1 inspection at this station
StationHWY 169 SB/310TH ST
1 inspection at this station
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Data sources & freshness
FMCSA Company Census File
Generated from 24-hour old database. Contact info and fleet counts may lag.
Updated 1 weeks ago
FMCSA Authority History
Updated 1 weeks ago
FMCSA Insurance Filings
Updated 1 weeks ago
FMCSA Vehicle Inspection File
Updated 1 weeks ago
Refresh dataLast updated: Apr 5, 2026