Ranney Collector Construction

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Presentation transcript:

Ranney Collector Construction

Ranney Collector Overview Pump Station Central Reinforced Concrete Caisson Horizontal Well Screens

Collector Well Construction Primary Phases of Collector Well Construction Caisson Construction Lateral Projection Screen Installation and Development Performance Testing

Caisson Construction STEP 1 STEP 2 STEP 3 L1 L1 L2 Grade Grade Grade

Initial Caisson Lift with Cutting Shoe, Toledo Bend Reservoir

Inner and Outer Forms

Caisson Lift with Ports, Lake Havasu City

Clam Shell Excavation, Louisville

Clam Shell Excavation, Lake Havasu City

Floor Reinforcing, Iowa City

Completed Caisson

Collector Well Construction Primary Phases of Collector Well Construction Caisson Construction Lateral Projection Screen Installation and Development Performance Testing

Lateral Projection Grade SWL Caisson Lateral A Lateral B Ports

Hydraulic Jacking Machine

Lateral Projection, Iowa City

TYPICAL BORE PILOT Minimize Friction Remove Material Provide Horizontal Bore

Projection Pipe and Sand Line

Laterals Installation Bore Pilot & Projection Pipe Centered On Port Assembly

Projection Pipe Advancement Lateral Installation Projection Pipe Advancement

Projection Pipe Advancement Lateral Installation Projection Pipe Advancement

Collector Well Construction Primary Phases of Collector Well Construction Caisson Construction Lateral Projection Screen Installation and Development Performance Testing

Screen Installation Grade SWL Caisson Lateral A Lateral B (Wire-Wrap Screen) (Wire-Wrap Screen)

Wire-Wrapped Screen

Wire-Wrapped Screen

Development By Overpumping Q Grade SWL Caisson Pump Laterals

Development By Surging

Sand Content Measurement

Collector Well Construction Primary Phases of Collector Well Construction Caisson Construction Lateral Projection Screen Installation and Development Performance Testing

Performance Testing, Sonoma County

Top Slab Installation

Conceptual Design and Yield Ranney Collector Conceptual Design and Yield

Equations to Quantify Yield

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

Conceptual Design

Yield With Recharge

Yield Without Recharge

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