SEA LAMPREY BARRIER ANALYSIS
Performance overview
Understand today’s barrier. Explore what comes next.
Sucker River · screening exampleMichigan · Great Lakes basin • US customary units
Example / unsavedPreliminary screening analysis · Some inputs are assumed. Confirm survey data before design decisions.
CREST–TAILWATER DIFFERENCE
1.47ft
Below 1.50 ft drop criterion
ESTIMATED BARRIER RATING
17.5yr
At the selected barrier height
UPSTREAM CONSTRAINT MET?
Yes
✓Headwater 780.56 ft · limit 785.00 ft
ANALYSIS STORM
20yr
Flow 273 cfs · AEP 5.0%
Barrier profile
Water levels at the selected storm event
HeadwaterTailwaterBarrier crestUpstream limit
HEADWATER780.56 ft
TAILWATER777.53 ft
WEIR FLOW273 cfs
BARRIER CREST779.00 ft
EXPLORE A SCENARIO
Try a barrier height
Move the slider to see how a different height changes performance.
5.00 ft
0 ft15 ft
Drop criterion metNo
Upstream constraint metYes
Height is measured above the minimum cross-section elevation. Scenario changes do not replace the existing crest.Channel cross section
Station and elevation from your entered geometry
8 section pointsWidth 80 ftLowest elevation 774 ftHorizontal and vertical axes are scaled independently.
Storm performance at a glance
A consistent comparison across the program’s key events
| Storm event | Peak flow | Tailwater | Crest–tailwater | Drop met | Constraint met |
|---|---|---|---|---|---|
| 5-year | 220 cfs | 777.16 ft | 1.84 ft | Yes | Yes |
| 10-year | 250 cfs | 777.38 ft | 1.62 ft | Yes | Yes |
| 15-year | 263 cfs | 777.47 ft | 1.53 ft | Yes | Yes |
| 20-yearTARGET | 273 cfs | 777.53 ft | 1.47 ft | No | Yes |
| 100-year | 340 cfs | 777.95 ft | 1.05 ft | No | Yes |
From existing conditions to a design scenario
Size a barrier and explore monthly days below the drop criterion.