Please note that the hyperlinked Streams data is only available in the following mapping applications:

Water Monitoring Atlas
Watershed Atlas

1. Zoom In below a 1:200000 scale, or until the Stream (NHD) layer appears in the Legend.

2. Make the Stream (NHD) layer active.

3. Select the "hyperlink" button: It is located in the Toolbar near the top of the web page.

4. After selecting the "hyperlink" button, move your mouse to the Interactive Map and click on a Stream (NHD) line segment.

5. A new website containing stream data for that segment will appear. You can retrieve information from this website for several of Iowa's rivers and streams, including fish survey (abundance) data.

Still experiencing problems? Make sure you have your pop-up blocker turned off.

Link directly to the IRIS website.