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

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