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Impaired Driving Section· Overview

The Impaired Driving Section (IDS) is made up of the Breath Test, Drug Evaluation and Classification, Standardized Field Sobriety Testing, Ignition Interlock and Traffic Safety Resource Prosecutor Programs of the Washington State Patrol. The Impaired Driving Section also coordinates and supports the Mobile Impaired Driving Unit (MIDU).

Impaired Driving Programs

Breath Test Program

The Breath Test Program (BTP) manages, maintains, and certifies the calibration of more than 220 evidentiary breath testing instruments in the state. The instruments are used for over 40,000 tests annually. The BTP is comprised of 13 technicians, two sergeants and one administrative assistant. The technicians provide operator certification and re-certification training for over 8,000 police officers throughout the state. The technicians offer expert witness testimony in support of the statewide breath alcohol testing program. The program compiles computerized statistical data and analysis related to DUI enforcement to members of the criminal justice community.

Breath Test Program public records, including DataMaster database records, signed affidavits and repair certifications, standard operating procedures (SOPs), and curriculum vitae, are available online at our Web Based Discovery Materials Site (WebDMS).

Please note that WebDMS will be updated weekly. If you have questions or comments or do not find the records you are seeking, please contact the Breath Test Program at or call the Breath Test Program of the Washington State Patrol in your local area at:

  • Burlington (360) 757-7553
  • Kennewick (509) 734-7034
  • Marysville (360) 654-1127
  • Poulsbo (360) 473-0300
    ext 85122
  • Tumwater (360) 586-1516
  • Seattle (206) 720-3018
  • Spokane (509) 227-6615
  • Tacoma (253) 538-3143
  • Union Gap (509) 249-6716
  • Vancouver (360) 449-7916
  • Wenatchee (509) 682-8118

Drug Evaluation and Classification Program

The Drug Evaluation and Classification Program (DEC) began in February, 1996. A Drug Recognition Expert (DRE) is a law enforcement officer trained to recognize impairment in drivers under the influence of drugs other than, or in addition to, alcohol. Drug Recognition Experts (DREs) are trained to recognize the symptoms of intoxication for seven different categories of drugs. A DRE conducts a standardized, diagnostic 12 step examination of persons arrested or suspected of drug-impaired driving or similar offenses. Based on the results of the examination the DRE develops an expert opinion.

The Washington State Patrol coordinates the DRE program for the state of Washington. Impaired driver training is provided to all law enforcement agencies in the state. Many law enforcement agencies in the state of Washington participate in the Drug Recognition Expert program. Currently there are over 200 Drug Recognition Experts in the state of Washington who perform over 1,600 evaluations annually.

Ignition Interlock Program

The Impaired Driving Section (IDS) is responsible for monitoring all aspects of the Ignition Interlock Program. IDS, through legislative mandate, certifies ignition interlock manufacturers to conduct business in Washington State. This program also monitors ignition interlock installers by conducting annual onsite audits to verify the devices are being calibrated and installed under state guidelines. Citizens, required to have the device installed, are subject to random compliance checks and review of their individual device’s database.

The state interlock coordinator provides educational training and presentations to law enforcement and the ignition interlock community to insure the continued viability of the program.

Visit the Ignition Interlock Program for more information regarding this program.

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Mobile Impaired Driving Unit

The Mobile Impaired Driving Unit (MIDU)is a self-contained 36 foot motorhome that has been retrofitted as a mobile DUI processing center and a incident command post. When requested, the MIDU travels across the state in support of law enforcement efforts during DUI emphasis patrols or to emergency incidents such as wild land fires or other natural disasters. Equipped with three breath testing instruments,two temporary holding cells,

Inside MIDU three computer work stations, an incident command computer terminal, a dispatcher console with wireless access to the WSP dispatch centers around the state, and a microwave downlink tower for real time video broadcasts from FLIR equipped aircraft, the MIDU is a full service police station on wheels.

When supporting DUI emphasis patrols the MIDU is staffed by officers who assist law enforcement agencies by effectively and efficiently processing impaired drivers in a faster manner which subsequently allows the patrol officer to return to theroad in a manner of minutes as opposed to the hours it normally takes.

The MIDU is typically requested for large scale events where statistics have shown an increased number of DUI collisions and arrests. Some of these annual events include holiday emphasis patrols such as St. Patrick’s Day, the 4th of July, New Year's Eve and regional events such as Spokane Hoopfest, Rod Run in Long Beach, Water Follies in the Tri-Cities, the Apple Blossom Festival in Wenatchee, October Fest in Leavenworth and during Seafair in Seattle. The WSP works close with its partners in government such as the Washington Traffic Safety Commission (WTSC) and the National Highway Traffic Safety Administration (NHTSA) to schedule DUI emphasis patrols involving the MIDU during other local events striving for the goal of Target Zero.


The MIDU is supported in part by the following sponsors: State Farm Insurance, Poulsbo RV, Whelen, Bostec Inc., SuperGraphics, Guth Simulators, National Patent Analytical Systems, Inc.

For questions or to request the MIDU for an event, please contact the MIDU State Coordinator via email:

Impaired Driving Section Directory

Section Headquarters - Seattle

Impaired Driving Section - Washington State Patrol
811 E Roanoke St.
Seattle, WA 98102-3915
(206) 720-3018

Section Commander
Lieutenant Rob Sharpe
(206) 720-3018, Ext. 24105

Events and Training Coordinator
Ms Rebecca Cortez
(206) 720-3018, Ext. 24126

Public Disclosure Coordinator
Ms Terra Shin
(206) 720-3018, Ext. 24108

Mobile Impaired Driving Unit Coordinator

DRE/SFST State Coordinator
Sergeant Mark Crandall
(206) 720-3018, Ext. 24121

Ignition Interlock Program

Breath Test Program Supervisor for Districts 2, 3, 4, 6
Sergeant Dave Divis
(206) 720-3018, Ext. 24119

Breath Test Program Supervisor for Districts 1, 5, 7, 8
Sergeant Bruce Maier
(206) 720-3018, Ext. 24119

Breath Test Program - Secretary Senior
Shelley Benante
(206) 720-3018, Ext. 24104

District 1 - Tacoma and Tumwater

Impaired Driving Section
2502 112th St E
Tacoma, WA 98445

Trooper Al Havenner
(253) 538-3143

Impaired Driving Section
222 Tumwater Blvd, Bldg 16
Tumwater, WA 98504-2640

Forensic Scientist Ruth Cramer
(360) 586-1516

District 2 - Seattle

Impaired Driving Section
811 E Roanoke
Seattle, WA 98102-3915

Trooper Keith Lentz
(206) 720-3018, Ext. 24138

Trooper Mike Qunell
(206) 720-3018, Ext. 24109

Trooper Jim VanDiest
(206) 720-3018, Ext. 24106

District 3 - Union Gap and Kennewick

Impaired Driving Section
2715 Rudkin Rd
Union Gap, WA 98903

Trooper Mel Sterkel
(509) 249-6716

Impaired Driving Section
143302 E Law LN
Kennewick, WA 99337

This Position is Currently Vacant
Contact: Trooper Mel Sterkel
(509) 249-6716

District 4 - Spokane

Impaired Driving Section
W 6403 Rowand Rd
Spokane, WA 99224

Trooper Jon McKee
(509) 227-6615

District 5 - Vancouver

Impaired Driving Section
11018 NE 51st Circle
Vancouver, WA 98682-6686

Trooper Trevor Downey
(360) 449-7916

District 6 - Wenatchee

Impaired Driving Section
2822 Euclid Ave
Wenatchee, WA 98801

Trooper Tom Moberg
(509) 682-8118

District 7 - Marysville and Burlington

Impaired Driving Section
2700 116th Street NE
Marysville, WA 98271-9425

Trooper Sue Harbour
(360) 654-1127

Impaired Driving Section (Physical Address)
10945 Chuckanut DR
Burlington, WA 98233

Impaired Driving Section (Mailing Address)
Attn: Trooper Cameron Birman
3860 Airport Way
Bellingham, WA 98226-8040

Trooper Cameron Birman
(360) 757-7553

District 8 - Poulsbo

Impaired Driving Section
22065 Viking Way NW
Poulsbo, WA 98370-0451

Forensic Scientist Bill Bogen
(360) 473-0300 Ext. 85122

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