Stream Maintenance and DNR Indiana Soil and Water Conservation - - PowerPoint PPT Presentation

Stream Maintenance and DNR

Indiana Soil and Water Conservation Districts January 9, 2017

Darrin Miller, P.E. CFM

Hydraulic Engineer – Engineering Services North Basin

Flood Control Act IC 14-28-1

• A permit is required to erect, make, use,

maintain, or remove a structure, an

• bstruction, a deposit, or an excavation

in or on a floodway

• Typical activities: bank protection,

bridges, buildings, channel work, dams, excavations, fills, levees, outfalls, and utility crossings

Floodplain & Floodway

Floodplain 1% Annual Chance (100 –year flood) For Buildings in the Floodplain Flood Protection Grade = Base Flood Elevation + 2 feet

Who Regulates What?

Public freshwater lake: IDNR, USACE & IDEM Navigable water: IDNR, USACE & IDEM Stream (non- wetland) floodway: IDNR Floodway wetland: IDNR, USACE & IDEM Adjacent wetland: USACE & IDEM Stream (less than 1 square mile drainage area): USACE & IDEM Isolated wetland: IDEM Stream: (Tributary) IDNR, USACE & IDEM

Things you can do without a DNR permit

• Repair an Existing Ag Levee
• Install Field Tiles, Outfall Structures

and Grassed Waterways

• Remove Logjams and Debris
• Logjam and Sediment Bar Removal

from a bridge or culvert opening

Ag Levee Repair

Ag Levee Repair

• Constructed before January 1, 1973

with or without a DNR Permit

• Can repair to the same height and

physical dimensions that existed before failure

Ag Levee Repair

• Constructed after January 1, 1973 and

permitted by DNR

• Can repair to the same height and

physical dimensions that were previously approved. All work shall be done in accordance with all conditions listed on the DNR permit

Ag Levee Repair

Ag Levee Repair

Drain Tile, Outfall Structure &/or Grassed Waterway General License

• Notification to the Department of Natural

Resources is not required for outfall projects that qualify for an exemption under 312 IAC 10 (effective January 1, 2002). Refer to: 312 IAC 10-5-8

• Division of Water will NOT make the

determination for you as to whether or not a proposed outfall project qualifies for the General License

Drain Tile, Outfall Structure &/or Grassed Waterway General License

(312 IAC 10-5-8)

• General Environmental Criteria
• Project Specific Environmental

Criteria

• Project Specific Technical Criteria
• No Notification to DNR

General Environmental Criteria

• Within a river or stream listed in the Outstanding Rivers List,

www.in.gov/legislative/iac/20070530-IR- 312070287NRA.xml.pdf or

• Within a salmonoid stream, noted by SS in:

www.in.gov/dnr/water/5067.htm or

• Within a natural, scenic, or recreational river or stream

designated under 312 IAC 7-2.

www.in.gov/legislative/iac/T03120/A00070.PDF? or

• Below the Ordinary High Watermark of a Navigable Waterway,

www.in.gov/nrc/2390.htm or

• Requires an Individual Corps permit

Specific Environmental Criteria

(Slide 1 of 4)

• No more than one (1) acre of trees removed within

floodway

• Construction within the waterway between April 1

and June 30 shall not exceed a total of two (2) calendar days

Specific Environmental Criteria

(Slide 2 of 4)

• Best Management Practices be used
• www.in.gov/dnr/water/4892.htm

Specific Environmental Criteria

(Slide 3 of 4)

• Disturbed areas be mulched and seeded with native

species, if not practicable, plant mixture of red clover, orchard grass, timothy, perennial rye grass or another species approved by DNR

Specific Environmental Criteria

(Slide 4 of 4)

• Slopes of 3:1 or steeper or areas where runoff is

conveyed through a channel or swale be stabilized with an erosion control blanket or suitable structural armament

• Concentrated discharge points be protected with

structural armament to the normal water level. Riprap must have an average minimum diameter of 6 inches and extend below the normal water level

• Not exceed ten (10)

square feet in cross- sectional flow area as determined by the summation of cross- sectional area of conduits within the project area

Technical Criteria for Outfall Structures

(Slide 1 of 3)

Technical Criteria for Outfall Structures

(Slide 2 of 3)

• The structure shall be supported by headwall, slope wall, or

anchored end section and conform to the bank.

• If flow passing through the outfall in a reverse direction would

induce flood damages during a regulatory flood, the outfall shall be equipped with a closure mechanism.

• If the outfall is a grassed waterway, the depth of the swale

shall not exceed 5 feet as measured from the lowest bank elevation to the bottom of the swale

• Not exceed an area of disturbance 30 feet wide

Technical Criteria for Grassed Waterways

(Slide 3 of 3) 30’

Logjam & Debris Removal Types of Authorization

(Post 7/1/2010)

• Statutory Exemption,

IC 14-28-1-22(b)(6)

• General License without Notification
• General License with Notification
• Permit

Logjam & Debris Removal

Statutory Exemption IC 14-28-1-22(b)(6)

• Work must not be within a salmonid stream listed under

327 IAC 2-1.5-5 without prior approval of IDNR- Division of Fish & Wildlife

• Work must not be within a natural, scenic, or recreational

river or stream designated under 312 IAC 7-2

• Blue River – Harrison, Crawford, & Washington Counties
• Cedar Creek – Allen & DeKalb Counties
• Wildcat Creek – Tippecanoe & Carroll Counties (Also includes

portions of North Fork and South Fork Wildcat Creek)

Logjam & Debris Removal

Statutory Exemption IC 14-28-1-22(b)(6)

• Free logs or affixed logs that are crossways in the

floodplain must be cut, relocated, and removed from the

• floodplain. May be maintained in the floodplain, if

properly anchored or secured to resist flotation or dislodging by the flow of water and placement is in an area that is not a wetland. Logs must be removed and secured with a minimum of damage to vegetation.

Logjam & Debris Removal

Statutory Exemption IC 14-28-1-22(b)(6)

• Isolated or single logs that are embedded, lodged, or

rooted in the channel, and that do not span the channel or cause flow problems, must not be removed unless the logs are either of the following: 1) Associated with or in close proximity to larger obstructions 2) Posing a hazard to navigation

Logjam & Debris Removal

Statutory Exemption IC 14-28-1-22(b)(6)

• A leaning or severely damaged tree that is in immediate

danger of falling into the waterway may be cut and removed if the tree is associated with or in close proximity to an obstruction. The root system and stump of the tree must be left in place.

• To the extent practicable, the construction of access roads

must be minimized and should not result in the elevation

• f the floodplain.

Logjam & Debris Removal

Statutory Exemption IC 14-28-1-22(b)(6)

• To the extent practicable, work should be performed

exclusively from one (1) side of a waterway. Crossing the bed of a waterway is prohibited.

• To prevent the flow of sediment laden water back into the

waterway, appropriate sediment control measures must be installed.

Logjam & Debris Removal

Statutory Exemption IC 14-28-1-22(b)(6)

• Within fifteen (15) days, all bare and disturbed areas must

be revegetated with a mixture of grasses and legumes. Tall fescue must not be used under this subdivision, except that low endophyte tall fescue may be used in the bottom of the waterway and on side slopes.

Logjam & Debris Removal

General License Without Notification

• Use of Hand Held Tools Only
• Qualified Logjam & Sandbar Removals From Beneath

Bridges (312 IAC 10-5-7)

• Equipment must be operated from the bridge or

bank within the right-of-way, no equipment in the river or stream

• An access corridor for equipment extends no more

than fifty (50) feet beyond the right-of-way

• Logjam or sandbar to be removed is located partially
• r exclusively within the right-of-way

January 2002

Big Log Jam

Any Questions?

DoWorc

• DNR Division of Water's Online

Research Center

– GIS data made available online

DoWorc

– A Disclaimer will appear on the right side of the screen. To close the Disclaimer pop-up window, click the X at the upper right hand corner of the Disclaimer window.

Click

DoWorc

• Tools

– Drag the map in any direction by using the mouse button to click on the map and slide while holding down the mouse button. – Click the plus (+) or the minus (-) buttons to zoom in or out on the map

DoWorc

• Basemaps

– Basemaps allows you to change the base map behind all of the data; this map tool is set up with a ‘best available imagery’ layer and a Digital Elevation

• Model. You will need to turn these layers off in order to see any changes to

base map you have made.

DoWorc

• Layers - Various data sets can be viewed

– County boundaries – Township boundaries – Flood zones – Permits, SEAs, other DNR files – Roads – Dams – Basin commissions – Local Floodplain Administrators – Aerial Imagery from various years

INFIP

• INdiana Floodplain Information Portal

The “Best Available Data” Layer

Best Available Data Layer

NFHL Zone A Floodways Best Available Data Layer

What layer do I use????

BEST AVAILABLE

• DNR Permitting for

the Indiana Flood Control Act

• Local jurisdiction

floodplain construction permitting determining building elevations

• General planning

purposes EFFECTIVE

• Flood Insurance

Determinations

• Letters of Map

Change Zones AE / AH / AO

• Letters of Map

Change Zone A