Hydraulic Analysis and Embankment Protection Conceptual Design
Hydraulic Analysis and Embankment Protection Conceptual Design
Hydraulic Analysis and Embankment Protection Conceptual Design
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<strong>Embankment</strong> <strong>Protection</strong> Concepts –<br />
What could work at I-680?<br />
Vegetated<br />
Cover Reinforced Vegetation Hard Armor<br />
Reinforced<br />
Vegetation/<br />
Hard Armor<br />
Grass Cover<br />
(Seeding)<br />
North<br />
American<br />
Green<br />
Scourstop<br />
Green<br />
Armor<br />
System<br />
Rip-Rap<br />
Articulating<br />
Concrete Block<br />
Slope<br />
Paving<br />
Geoweb<br />
Max Permissible<br />
Velocity (fps)<br />
3.5 to 8 (1) 25 21 fps 20 5 to 18 (1) >18 fps (1) >18 (1) 10 to 26.5<br />
<strong>Design</strong> Life<br />
Very Long<br />
Short<br />
(3 yr)<br />
Medium to<br />
Medium to<br />
Medium to Long<br />
Long<br />
long<br />
Long<br />
long (50+ yr) (50+ yr)<br />
(25+ yr)<br />
(25+ yr)<br />
Long<br />
(50+ yr)<br />
Maintenance<br />
Considerations<br />
Mowing<br />
Mowing<br />
No mowing,<br />
must spray<br />
Mowing<br />
Crack<br />
sealing<br />
No Mowing<br />
Mowing<br />
Constructability Easy Easy Medium Medium Difficult Medium/ Difficult<br />
Material Availability High High<br />
Depends on<br />
Area<br />
High<br />
High<br />
High (2 Iowa<br />
Distributors)<br />
Construction Cost<br />
Low to<br />
Medium (2)<br />
Medium<br />
Medium ($9-<br />
10/sf)<br />
Medium High (2) High High<br />
Medium (2) to<br />
High<br />
Maintenance Cost Low (2) May require periodic reseeding. Low (2) Low Low Low (2)<br />
Notes:<br />
• Reference (Fischenich, 2001)<br />
• Reference (IDNR, 2006)
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