Ranney Ranney Collector Collector Constructio Constructio n n
Ranney Collector Construction. Pump Station Central Reinforced Concrete Caisson Horizontal Well Screens Ranney Collector Overview.
Dec 18, 2015
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Ranney Ranney Collector Collector
ConstructionConstruction
• Pump Station
•Central Reinforced Concrete Caisson
• Horizontal Well Screens
Ranney Collector Overview
Caisson Construction
Lateral Projection
Screen Installation and Development
Performance Testing
Primary Phases of Primary Phases of Collector Well ConstructionCollector Well Construction
Caisson ConstructionCaisson Construction
Grade
L1
Grade Grade
L1
L1 L1
L2
STEP 1 STEP 2 STEP 3
Initial Caisson Lift with Cutting Shoe,Initial Caisson Lift with Cutting Shoe,
Toledo Bend ReservoirToledo Bend Reservoir
Inner and Outer FormsInner and Outer Forms
Caisson Lift with Ports,Caisson Lift with Ports,Lake Havasu CityLake Havasu City
Clam Shell Excavation, LouisvilleClam Shell Excavation, Louisville
Clam Shell Excavation, Clam Shell Excavation, Lake Havasu CityLake Havasu City
Floor Reinforcing, Iowa CityFloor Reinforcing, Iowa City
Completed CaissonCompleted Caisson
Caisson Construction
Lateral Projection
Screen Installation and Development
Performance Testing
Primary Phases of Primary Phases of Collector Well ConstructionCollector Well Construction
Caisson
GradeSWL
Ports
Lateral A Lateral B
Lateral ProjectionLateral Projection
Hydraulic Jacking MachineHydraulic Jacking Machine
Lateral Projection, Iowa CityLateral Projection, Iowa City
TYPICAL BORE PILOTTYPICAL BORE PILOT
• Minimize FrictionMinimize Friction• Remove MaterialRemove Material• Provide Horizontal BoreProvide Horizontal Bore
Projection Pipe and Sand LineProjection Pipe and Sand Line
Laterals Installation Laterals Installation
Bore Pilot & Projection Pipe Centered On Bore Pilot & Projection Pipe Centered On Port AssemblyPort Assembly
Lateral Installation Lateral Installation
Projection Pipe AdvancementProjection Pipe Advancement
Lateral Installation Lateral Installation
Projection Pipe AdvancementProjection Pipe Advancement
Caisson Construction
Lateral Projection
Screen Installation and Development
Performance Testing
Primary Phases of Primary Phases of Collector Well ConstructionCollector Well Construction
Caisson
GradeSWL
Lateral A Lateral B
Screen InstallationScreen Installation
(Wire-Wrap Screen)(Wire-Wrap Screen)
Wire-Wrapped Screen Wire-Wrapped Screen
Wire-Wrapped Screen Wire-Wrapped Screen
Caisson
GradeSWL
Laterals
Development By OverpumpingDevelopment By Overpumping
Q
Pump
Development By SurgingDevelopment By Surging
Sand Content MeasurementSand Content Measurement
Caisson Construction
Lateral Projection
Screen Installation and Development
Performance Testing
Primary Phases of Primary Phases of Collector Well ConstructionCollector Well Construction
Performance Testing, Sonoma CountyPerformance Testing, Sonoma County
Top Slab InstallationTop Slab Installation
Ranney Ranney CollectorCollector
Conceptual Conceptual Design and Design and
YieldYield
Equations to Quantify YieldEquations to Quantify Yield
cs
b
42
w
i w
s Q
2 Kb
b
r
2 1 - b
2 z + r
Ln
cos
))2(bπ
cos1(2
))π/((ln2
87.1
πKb4
22
wi
wyc
rz
rb
l
b
Kbt
lSW
Qs
Input Parameters / Design AssumptionsInput Parameters / Design Assumptions
T = 482,600 gpd/ftS = 0.313K = 5602 gpd/ft sqB = 86 feetA = 700 feetZi = 75 feet
Laterals – 10 to 12Lateral Radius – 0.5 ftLateral Length – 200 ftCaisson Radius – 8 ftPumping Level – 15 ft above laterals
Conceptual DesignConceptual Design
Yield With RechargeYield With Recharge
0
10
20
30
40
50
60
70
0 5000 10000 15000 20000 25000
Estimated Yield (gpm)
Pro
ject
ed D
raw
do
wn
(fe
et)
Minimum Design Pumping Level = 15 feet above Laterals
Yield Without RechargeYield Without Recharge
0
10
20
30
40
50
60
70
0 5000 10000 15000
Estimated Yield (gpm)
Pro
ject
ed D
raw
do
wn
(fe
et)
Drawdown @ 180 days
Minimum Design Pumping Level = 15 feet above laterals
Characteristics of Characteristics of Ranney SystemRanney System
• $12.6 to $16.0 million for Total System• 100% of Construction and Maintenance On Shore• Yield Remains High When River Migrates • Pilot Testing to Confirm Yield
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