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Ranney Collector Construction
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Ranney Collector Overview
Pump Station Central Reinforced Concrete Caisson Horizontal Well Screens
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Collector Well Construction
Primary Phases of Collector Well Construction Caisson Construction Lateral Projection Screen Installation and Development Performance Testing
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Caisson Construction STEP 1 STEP 2 STEP 3 L1 L1 L2 Grade Grade Grade
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Initial Caisson Lift with Cutting Shoe,
Toledo Bend Reservoir
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Inner and Outer Forms
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Caisson Lift with Ports,
Lake Havasu City
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Clam Shell Excavation, Louisville
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Clam Shell Excavation, Lake Havasu City
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Floor Reinforcing, Iowa City
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Completed Caisson
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Collector Well Construction
Primary Phases of Collector Well Construction Caisson Construction Lateral Projection Screen Installation and Development Performance Testing
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Lateral Projection Grade SWL Caisson Lateral A Lateral B Ports
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Hydraulic Jacking Machine
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Lateral Projection, Iowa City
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TYPICAL BORE PILOT Minimize Friction Remove Material
Provide Horizontal Bore
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Projection Pipe and Sand Line
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Laterals Installation
Bore Pilot & Projection Pipe Centered On Port Assembly
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Projection Pipe Advancement
Lateral Installation Projection Pipe Advancement
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Projection Pipe Advancement
Lateral Installation Projection Pipe Advancement
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Collector Well Construction
Primary Phases of Collector Well Construction Caisson Construction Lateral Projection Screen Installation and Development Performance Testing
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Screen Installation Grade SWL Caisson Lateral A Lateral B
(Wire-Wrap Screen) (Wire-Wrap Screen)
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Wire-Wrapped Screen
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Wire-Wrapped Screen
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Development By Overpumping
Q Grade SWL Caisson Pump Laterals
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Development By Surging
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Sand Content Measurement
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Collector Well Construction
Primary Phases of Collector Well Construction Caisson Construction Lateral Projection Screen Installation and Development Performance Testing
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Performance Testing, Sonoma County
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Top Slab Installation
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Conceptual Design and Yield
Ranney Collector Conceptual Design and Yield
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Equations to Quantify Yield
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Input Parameters / Design Assumptions
T = 482,600 gpd/ft S = 0.313 K = 5602 gpd/ft sq B = 86 feet A = 700 feet Zi = 75 feet Laterals – 10 to 12 Lateral Radius – 0.5 ft Lateral Length – 200 ft Caisson Radius – 8 ft Pumping Level – 15 ft above laterals
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Conceptual Design
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Yield With Recharge
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Yield Without Recharge
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Characteristics of Ranney 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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