watercraft inspections

Watercraft Inspection Stations are Idaho’s first-line of defense against the introduction and spread of aquatic invasive species (AIS). Overland travel of contaminated watercraft and equipment is believed to be the single largest vector for AIS movement from one water system to the next. 

Inspection Stations

Idaho’s inspection stations are placed on major highways at or near the Idaho state line. This strategy is taken to maximize contact with boats that are traveling into the state from other impacted states.

High-Risk Watercraft Inspections

High-risk inspections are intense and include a thorough inspection of the exterior and interior parts of the boat. The inspection includes a thorough and complete visual and tactile inspection of all portions of the boat, including compartments, bilge, trailer and any equipment, gear, ropes or anchors.

If any biological material is found on the boat or equipment, the inspectors conduct a roadside “hotwash” of the watercraft. This is done to prevent the spread of other invasive species such as New Zealand mudsnail, Eurasian watermilfoil, and hydrilla.

More than 600,000 inspections have been conducted in Idaho under this program since 2009. Through these inspections, 245 mussel-fouled boats have been intercepted in Idaho since July of 2009.

Boats Considered “High-risk” to the state of Idaho

  • Boats that have been in mussel-infested states recently (within the last 30 days).

  • Watercraft coming from another state (especially commercially hauled boats).

  • Boats that show a lot of dirt, grime, or slime below the waterline.

  • Boats that have standing water on board.

These mussels were found attached to a used vessel sold at auction in Las Vegas.

These mussels were found attached to a used vessel sold at auction in Las Vegas.

2019 Inspection Station Information

The 2019 watercraft inspection season is upon us with inspection stations opening statewide in the coming weeks. Below is a list of the stations for 2019 with some basic information collected throughout the season.

In addition to the listed inspection station locations, watercraft are inspected during the boating season at roving roadside inspection stations spread throughout the state. These additional inspections help ISDA better understand the boating public, and potential vectors of introduction into Idaho. Click on the tab below to view additional information collected at the inspection stations, and other projects by ISDA.

Inspection Station # Inspections Fouled Boats Status
Albeni Falls 530 - Open
Bruneau 2,000 - Open
Cedars 2,100 5 Open
Clark Fork 532 - Open
Cotterel 945 2 Open
Dubois - - Open
Franklin 394 2 Open
Huetter 863 - Open
Hwy 12 - - Open
Hwy 20 103 - Open
Hwy 51 65 - Open
Hwy 53 276 - Open
Hwy 87 83 - Open
Hwy 93 452 - Open
Malad 1,400 7 Open
Marsing 921 - Open
North Fork 8 - Open
Redfish Lake - - Open
Rose Lake 930 - Open
Samuels 673 - Open
Roving Crew- Boise 22 - Open
Roving Crew- Twin Falls - - Open
Roving Crew- Idaho Falls 15 - Open
Roving Crew- Hayden 23 - Open
Roving Crew- Sandpoint - - Open
Roving Crew- Bonners Ferry - - Opening soon
Henry's Lake - - Open
Season Totals 12,389 20*

* 4 Fouled boats found by ISDA field staff


Fouled Boat Information for 2019 

Fouled Boat # Location Found Origin Destination State Date Found
1 ISDA Staff Lake Huron, MI Idaho 2/28/2019
2 ISDA Staff Lake Havasu, AZ Idaho 3/7/2019
3 Malad Lake Havasu, AZ Alberta 3/18/2019
4 Cotterel Lake Powell, UT Idaho 3/27/2019
5 Malad Parker, AZ Montana 3/30/2019
6 Malad Lake Pleasant, AZ Washington 4/5/2019
7 Cedars Michigan Washington 4/6/2019
8 ISDA Staff Lake Havasu, CA Idaho 4/22/2019
9 Malad Lake Havasu, AZ Montana 4/25/2019
10 Malad Lake Powell, UT British Columbia 4/27/2019
11 Malad Lake Havasu, AZ Idaho 4/30/2019
12 Cedars Lake Wisconsin, WI British Columbia 5/1/2019
13 Franklin Lake Powell, UT Alaska 5/1/2019
14 Cedars Lake Champlain, VT Washington 5/13/2019
15 Franklin Lake Powell, UT Idaho 5/14/2019
16 ISDA Staff Mississippi, MN Idaho 5/17/2019
17 Malad Lake Pleasant, AZ Montana 5/17/2019
18 Cedars Lake Walloon, MI Idaho 5/19/2019
19 Cedars Lake Michigan, MI Washington 5/21/2019
20 Cotterel Texas Washington 5/21/2019

Banner and Photos: Idaho State Department of Agriculture.