FLOOD PLAIN OR FLOODWAY DEVELOPMENT: WHEN APPROVAL IS REQUIRED
Stream Bank Protective Devices
When Department Approval is Required Per IAC Chapter 71
Approval by the department for construction, operation, and maintenance of stream bank protective devices (including wing dikes, jetties, et cetera) shall be required in the following instances:
71.9(1) Rural areas. In rural areas:
- All stream bank protective devices along any river or stream draining more than 100 square miles.
- Stream bank protective devices along any river or stream draining between 10 and 100 square miles where the cross-sectional area of the river or stream channel is reduced more than 3 percent.
71.9(2) Urban areas. In urban areas:
- Stream bank protective devices along any river or stream draining more than 100 square miles.
- Stream bank protective devices along any river or stream draining between 2 and 100 square miles where the cross-sectional area of the river or stream channel is reduced more than 3 percent.
Application Forms, Checklists & Guidance:
| Application Form(s) |
*.pdf |
| Joint Application Form |
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| Application Guidance | *.pdf |
| How to Control Streambank Erosion |
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| Application Checklist(s) | *.pdf |
| Project Information Checklist for Streambank Revetment Measures (Riprap) |
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Aerial photographs can be obtained online at:
http://ortho.gis.iastate.edu/search.html.
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