1. Ranney Collector Construction

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

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

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

5. Initial Caisson Lift with Cutting Shoe,
Toledo Bend Reservoir

6. Inner and Outer Forms

7. Caisson Lift with Ports,
Lake Havasu City

8. Clam Shell Excavation, Louisville

9. Clam Shell Excavation, Lake Havasu City

10. Floor Reinforcing, Iowa City

11. Completed Caisson

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

13. Lateral Projection
Grade
SWL
Caisson
Lateral A
Lateral B
Ports

14. Hydraulic Jacking Machine

15. Lateral Projection, Iowa City

16. TYPICAL BORE PILOT Minimize Friction Remove Material
Provide Horizontal Bore

17. Projection Pipe and Sand Line

18. Laterals Installation
Bore Pilot & Projection Pipe Centered On Port Assembly

19. Projection Pipe Advancement
Lateral Installation
Projection Pipe Advancement

20. Projection Pipe Advancement
Lateral Installation
Projection Pipe Advancement

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

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

23. Wire-Wrapped Screen

24. Wire-Wrapped Screen

25. Development By OverpumpingQ
Grade
SWL
Caisson
Pump
Laterals

26. Development By Surging

27. Sand Content Measurement

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

29. Performance Testing, Sonoma County

30. Top Slab Installation

31. Conceptual Design and Yield
Ranney Collector
Conceptual Design and Yield

32. Equations to Quantify Yield

33. 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

34. Conceptual Design

35. Yield With Recharge

36. Yield Without Recharge

37. 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