Determining Ordinary High Water Corps of Engineers and Dept. of State Lands Jurisdictional...
-
Upload
frederick-cummings -
Category
Documents
-
view
221 -
download
0
Transcript of Determining Ordinary High Water Corps of Engineers and Dept. of State Lands Jurisdictional...
![Page 1: Determining Ordinary High Water Corps of Engineers and Dept. of State Lands Jurisdictional Determinations on non-Tidal Waterways ACEC Frannie Brindle 503.](https://reader036.fdocuments.net/reader036/viewer/2022062802/56649e995503460f94b9bc0a/html5/thumbnails/1.jpg)
Determining Ordinary High Water
Corps of Engineers and Dept. of State Lands Jurisdictional Determinations on non-Tidal
Waterways ACEC
Frannie Brindle 503 986-3370Natural Resource Unit Manager, ODOT Technical Services
![Page 2: Determining Ordinary High Water Corps of Engineers and Dept. of State Lands Jurisdictional Determinations on non-Tidal Waterways ACEC Frannie Brindle 503.](https://reader036.fdocuments.net/reader036/viewer/2022062802/56649e995503460f94b9bc0a/html5/thumbnails/2.jpg)
Dept. of State Lands and Corps of Engineers
DSL and CORPS of ENGINEERS’ REGULATORY JURISDICTION
Section 404 and State R/F LawSection 404 and State R/F Law
![Page 3: Determining Ordinary High Water Corps of Engineers and Dept. of State Lands Jurisdictional Determinations on non-Tidal Waterways ACEC Frannie Brindle 503.](https://reader036.fdocuments.net/reader036/viewer/2022062802/56649e995503460f94b9bc0a/html5/thumbnails/3.jpg)
OHW is Defined by Field Characteristics
![Page 4: Determining Ordinary High Water Corps of Engineers and Dept. of State Lands Jurisdictional Determinations on non-Tidal Waterways ACEC Frannie Brindle 503.](https://reader036.fdocuments.net/reader036/viewer/2022062802/56649e995503460f94b9bc0a/html5/thumbnails/4.jpg)
Drift material (or wrack) in fence?
Clear line impressed along shore?
Antelope Creek, Jackson Co. March 2006
![Page 5: Determining Ordinary High Water Corps of Engineers and Dept. of State Lands Jurisdictional Determinations on non-Tidal Waterways ACEC Frannie Brindle 503.](https://reader036.fdocuments.net/reader036/viewer/2022062802/56649e995503460f94b9bc0a/html5/thumbnails/5.jpg)
Field Characteristics
Culvert staining–not appropriate for determining fish passage design criteria
![Page 6: Determining Ordinary High Water Corps of Engineers and Dept. of State Lands Jurisdictional Determinations on non-Tidal Waterways ACEC Frannie Brindle 503.](https://reader036.fdocuments.net/reader036/viewer/2022062802/56649e995503460f94b9bc0a/html5/thumbnails/6.jpg)
Relation to Other ‘Lines’• 2-year flood elevation
– Calculated based on modeling – OHW is usually lower on the bank than the 2-year
• Bank full stage– Often used interchangeably with OHW in literature– Channel forming flows – Defined by DSL as the two-year recurrence interval flood
elevation
• Edge of Water• Top of bank
– Easily identifiable on some streams– OHW is usually below the top of the bank
![Page 7: Determining Ordinary High Water Corps of Engineers and Dept. of State Lands Jurisdictional Determinations on non-Tidal Waterways ACEC Frannie Brindle 503.](https://reader036.fdocuments.net/reader036/viewer/2022062802/56649e995503460f94b9bc0a/html5/thumbnails/7.jpg)
Context
In-water work timing
Resource Impacts
Fish Passage Design
![Page 8: Determining Ordinary High Water Corps of Engineers and Dept. of State Lands Jurisdictional Determinations on non-Tidal Waterways ACEC Frannie Brindle 503.](https://reader036.fdocuments.net/reader036/viewer/2022062802/56649e995503460f94b9bc0a/html5/thumbnails/8.jpg)
![Page 9: Determining Ordinary High Water Corps of Engineers and Dept. of State Lands Jurisdictional Determinations on non-Tidal Waterways ACEC Frannie Brindle 503.](https://reader036.fdocuments.net/reader036/viewer/2022062802/56649e995503460f94b9bc0a/html5/thumbnails/9.jpg)
Procedures• Flag OHW in field (flag only one side of stream if
access is limited and project line to the other side in CAD)
• Use painted stakes or flags where possible
• Take photos up- and down-stream showing flag placement
![Page 10: Determining Ordinary High Water Corps of Engineers and Dept. of State Lands Jurisdictional Determinations on non-Tidal Waterways ACEC Frannie Brindle 503.](https://reader036.fdocuments.net/reader036/viewer/2022062802/56649e995503460f94b9bc0a/html5/thumbnails/10.jpg)
Procedures (cont)• Complete form:
– OHW field characteristics observed– If 2-year used instead, should be stated
• Develop site sketch showing flag locations, photo-points
• Final Documentation includes OHW Determination Form, Photos, Site Sketch
![Page 11: Determining Ordinary High Water Corps of Engineers and Dept. of State Lands Jurisdictional Determinations on non-Tidal Waterways ACEC Frannie Brindle 503.](https://reader036.fdocuments.net/reader036/viewer/2022062802/56649e995503460f94b9bc0a/html5/thumbnails/11.jpg)
Completing the Form
![Page 12: Determining Ordinary High Water Corps of Engineers and Dept. of State Lands Jurisdictional Determinations on non-Tidal Waterways ACEC Frannie Brindle 503.](https://reader036.fdocuments.net/reader036/viewer/2022062802/56649e995503460f94b9bc0a/html5/thumbnails/12.jpg)
2
Sample Site Sketch
Low hanging vegetation- willows, other riparian
Steep bank- visible indicators
N
1
3
4Elevation point
flow
P1
P2, 3