Permitting in-water work: who has to say yes, and in what order.
Work below the ordinary high water mark is regulated whoever you are and whatever you place. The approvals are usually predictable, the sequencing is not, and the in-water work window is the constraint that most often decides the construction date.
This hub covers the federal and state approvals that recur on erosion and scour projects, what an agency reviewer looks for when the proposed material is not on a standard list, and what happens when a repair is urgent and the permitting is not. None of it is legal advice, and the requirements vary by district.
Articles
Assembling the submittal package
A checklist for the documents a permit application and a materials submittal actually need, and the four items most often missing when a package is returned.
Construction stormwater permitting
Separate from the permit to build the thing: authorisation for the disturbance of building it. Triggered by disturbed area, and it requires a SWPPP and inspections.
Emergency permitting when work cannot wait
Emergency provisions are a faster path with their own requirements and a follow-up obligation, not a way around the process. Establish which one applies before the event.
Endangered Species Act consultation
Not a permit, but a permit cannot issue until it is resolved. Consultation is the most common reason a routine bank repair takes a year instead of a season.
Floodplain permitting and no-rise
Armor in a regulatory floodway has to be shown not to raise the base flood elevation. That certification is a hydraulic analysis, and it constrains how far protection can project.
In-water work windows
The window, not the permit, usually sets the construction date. Miss it and you wait a year, so placement rate becomes a selection criterion rather than a preference.
Nationwide Permit 13 and bank stabilization
NWP 13 is the general permit most erosion repairs aim for. Its limits change at each reissuance, so design to the current text rather than to what you remember.
Getting a non-standard product approved
Agency specifications are written around a materials list. A product not on it is not prohibited, it is unaddressed, and the route through is a documented equivalency case.
Permitting in-water erosion work
Work below the ordinary high water mark is regulated whoever you are. The approvals are predictable; the sequencing and the work window are what decide your schedule.
Section 10 of the Rivers and Harbors Act
On a navigable water, Section 10 applies on top of Section 404. It protects navigation rather than water quality, and it catches work that places no fill at all.
Section 404 of the Clean Water Act
Armor placed on a bed or bank is fill. Section 404 regulates it, the Corps administers it, and the sequence you have to demonstrate is avoid, minimise, mitigate.
State coastal zone approvals
In a coastal state, a federal permit needs a consistency determination from the state coastal program. Many of those programs now prefer sloped protection to new vertical walls.
What an agency reviewer wants to see
A reviewer is looking for reasons to be comfortable approving. Show the problem, the alternatives considered, the minimisation, and the limits you already know about.
Where this topic already lives on the site.
The product pages, applications, and documentation that bear on permitting.
26 questions on permitting, answered.
Part of the full rock bag FAQ. Each question below opens at its answer.
Regulatory Approvals and Agency Requirements
- What approvals does in-water erosion work usually require?
- How does Section 404 of the Clean Water Act apply?
- When does Section 10 of the Rivers and Harbors Act come into play?
- Can bank protection be authorised under a nationwide permit?
- What does an agency reviewer typically want to see for a bagged armor solution?
- Does construction stormwater permitting apply to this work?
- How does floodplain permitting and a no-rise requirement affect the design?
- What is an in-water work window and how does it affect scheduling?
- Does endangered species consultation apply?
- Do coastal projects need a separate state approval?
- Does the work need an engineer's stamp?
- How do state DOT projects handle a product that is not on a standard materials list?
- What happens when a repair is urgent but permitting is not?
- How long does permitting usually take?
- Do watershed and conservation programmes have their own requirements?
- What applies on projects outside the United States?
Permitting and Environmental Planning
- Which agencies commonly have jurisdiction over in-water rock bag projects?
- What project information may be needed for a USACE Section 404 or Section 10 review?
- How do emergency repair authorizations differ from standard permit applications?
- How can fish-spawning seasons or environmental work windows affect scheduling?
- Which turbidity and sediment controls may be required during placement?
- Can regulators require work-area isolation even when the bags can be installed in flowing water?
- How should aggregate be documented as clean and free from contaminants?
- How can existing shoreline vegetation or live stakes be protected during placement?
- Which habitat conditions may need to be monitored after installation?
- What construction records should be retained for permit closeout and compliance reporting?
FES Solutions is a supplier, not the engineer of record. This article is general engineering background, not a site-specific design. Conditions vary, and the design decision for your project belongs to the engineer of record. Where rock bags are not the right answer.
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