US Army Corps of Engineers BUILDING STRONG ® Portable Floating Fish Collector (PFFC) Sean Askelson...
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Transcript of US Army Corps of Engineers BUILDING STRONG ® Portable Floating Fish Collector (PFFC) Sean Askelson...
US Army Corps of Engineers
BUILDING STRONG®
Portable Floating Fish Collector (PFFC)
Sean Askelson
Chris Budai - PM
Kristy Fortuny - TL
Dave Griffith
Todd Pierce
Greg Taylor
HDR, Cherokee,
USGS
FEB 2015
“WE”
BUILDING STRONG®
PORTLAND DISTRICT2
PFFC Overview
Information for Cougar Downstream Passage Schedule
► Design► Construction
Facility Overview Proximity to Tower Depth of FCM
Hydraulic Tuning Settings
Vibration
BUILDING STRONG®
PORTLAND DISTRICT3
PFFC-Information for Downstream Passage
We have a surface route at Cougar (temperature weirs)
We know the PFFC is small, but…► Looking at % fish in PFFC flow net, compare to % fish
captured► Looking at how that ratio changes when we operate at
lower flows► Could help narrow down fish outmigration timing?
We are learning on a small scale facility
BUILDING STRONG®
PORTLAND DISTRICT4
PFFC-Schedule Engineering Design Report DEC-2011
► Anticipated Final Plans and Specs APR-2012► Anticipated Operational by SEP-2012
No DDR. Straight to Plans and Specs Started Plans and Specs APR-2012 Finalized Plans and Specs OCT-2012 Construction Awarded APR-2013 Facility was Operational 28-MAR-2014
BUILDING STRONG®
PORTLAND DISTRICT5
PFFC-Facility Design Goals120 cfs total capacity
50 cfs half capacity
adjustable bypass Q
FLOW
BUILDING STRONG®
PORTLAND DISTRICT6
PFFC-Facility Plan View of Screens
8 Dewatering Bays Bypass Control
8’-1
0”
BUILDING STRONG®
PORTLAND DISTRICT7
PFFC-FacilityProfile View of Screens
8 Dewatering Bays Bypass Control
10’-
6”
BUILDING STRONG®
PORTLAND DISTRICT8
PFFC-Proximity to Tower
Due to anchorage limitations, the installed PFFC was ~150-ft from the Temperature Tower
The PFFC did not intercept the flow into the tower wet well► Potential to miss fish following the flow towards tower
The PFFC could not rotate “into” the flow due to anchorage constraints► Less than ideal entrance hydraulics
BUILDING STRONG®
PORTLAND DISTRICT9
PFFC-Proximity to Tower
BUILDING STRONG®
PORTLAND DISTRICT10
PFFC- Depth of Flow Control Module FCM was too low in water Bypass flow was too high (energy dissipation)
8’
Too Much Q
BUILDING STRONG®
PORTLAND DISTRICT11
Photo: T. Pierce
Ramp
Weir
Flume
We designed and installed interim remedy measures► Weir/ramp – controls
bypass flow► Flume – improves
fish safety/handling
PFFC - FCM
BUILDING STRONG®
PORTLAND DISTRICT12
PFFC-VibrationFloor Screen
Actuator
Fixed Panel
Adjustable Panel
HSS Guide
BUILDING STRONG®
PORTLAND DISTRICT13
Hydraulic TuningData collected and summarized by USGS, Cook, Washington.
50% Capacity
85% Capacity
BUILDING STRONG®
PORTLAND DISTRICT14
Hydraulic TuningData collected and summarized by USGS, Cook, Washington.
-10 -5 0 5 10 15 20 25
Ve
locity (
ft/s
)
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
LowHigh
-10 -5 0 5 10 15 20 25G
rad
ient (f
ps/ft)
-0.2
-0.1
0.0
0.1
0.2
0.3
Distance from entrance (ft)
-10 -5 0 5 10 15 20 25
Acce
lera
tio
n (
ft/s
2)
-0.2
-0.1
0.0
0.1
0.2
0.3
50% Capacity
85% Capacity
BUILDING STRONG®
PORTLAND DISTRICT15
PFFC-Operations in 2014 Not close enough to the tower Not aligned with flow lines approaching tower FCM too low
► Weir/Ramp to control bypass flows► Lower than optimal approach velocity► Did not reach capture velocity
Lower “high discharge” than desired Confirm velocity gradient through facility We learned a lot on a small scale facility!
BUILDING STRONG®
PORTLAND DISTRICT16
Closer to wet well and ability to rotate into flow
PFFC – Revised Proximity to Tower
BUILDING STRONG®
PORTLAND DISTRICT17
PFFC- Additional Improvements for 2015
Raising the FCM in the water column► Allows use of ballast to adjust depth► Remove the weir/ramp: allows the constrictor panels
to control bypass flow► Better hydraulic transition from screen to bypass► Less entrance depth @ same flow = higher velocities
Stiffened the porosity panels (minimize vibration)► Allow to operate at upper end of design range
More flow into facility = higher approach velocity