EEG Water316(b)

Summary of 316b

There are 544 U.S. power plants and several other facilities that will be affected by 316(b). These facilities withdraw at least two million gallons per day of cooling water.

The national requirements will be implemented through National Pollutant Discharge Elimination System (NPDES) permits. It requires that existing facilities that withdraw at least 25% of their water from an adjacent waterbody exclusively for cooling purposes reduce fish impingement.

EPA 316(b)

The EPA gives generators seven options for meeting “best technology available (BTA)” requirements for reducing impingement:• Closed cycle cooling

• Reduced design intake velocity*

• Reduced actual intake velocity*

• Velocity caps

• Modified traveling screens

• Seasonally deployed barrier nets

• Aquatic filter barriers*

* The velocity reduction and aquatic filter barrier equipment are available from Cook Legacy.

EPA 316(b)

Closed Cycle Cooling

Modified Traveling Screens

Seasonally Deployed Barrier

Net

Velocity Caps

Drum Screens

Tee Screens

Flat Panel Screens

Aquatic Filter

Barrier

Cook Legacy 316(b) ScopeProduct Description Highlights

Materials

Jacquelyn Coating Permanent metal coating that resists bio-fouling

Effective, safe for the environment, permanent solution. Less expensive than temporary coatings or building from other materials.

TIG-Welded Wedge Wire

Durable, strong, & flat wedge wire Tougher & stronger than resistance weld, better for stringy debris & ice than profile bar

Solutions

Tee or Drum Screen Cylindrical screens that don’t clog or kill fish

New flow modifier is most efficient on the market, and can be scaled for specific site.

HemiScreen Half cylinder screen for shallow water

Offers good performance, and no moving parts

AirBurst System to deliver a controlled burst of air to clean screens

Our experience ensures a system that works “out of the box” rather than costly mechanical integration

IceBreak System to deliver intermittent air near the intake to prevent icing

Integral add-on to the airburst system is more cost effective than stand-alone. Our IceBreak algorithm supports efficient mixing.

Debris Jet System to deliver sparge of air to halt debris

Bring screens to shallow water

Bubble Meter Monitors head loss across a screen Ensures that the screen is free of debris

Flow Blade Induces sweeping velocity in stagnant water

Supports fish passage in estuarine or intermittent flow environments

Cost Comparison

Technology Site-Specific Cost (Million USD)

Wedge Wire Screens $3.5-$144

Aquatic Filter Barriers $9-72

Barrier Nets $0.1-$14

Modified Traveling Screens $0.3-$44

EPA 316(b)

Meeting impingement standards with Wedgewire screens:

1. Lower design velocity

2. Sensitivity analysis & standard orientations go here.

EPA 316(b)

Make it easy to installTraveling screens - fit with civil work

Wedgewires - fit in the water body

Traveling Screen Considerations

• Velocity & resulting screen quantity• Civil work for screen fit• Civil work for additional bypass • Ongoing operation & maintenance

Wedgewire Screen Considerations

• Velocity & resulting screen quantity• Water body• Water quality

Important Details: Flow modification

Old Flow Modifier

Velocity comparison

Feature Description

Ingersoll Rand Air Compressor Reliability of with industry leader

RAMA™ Control System and easy-to-use HMI Monitor and control the system in an intuitive manner

Icebreak™ System Control ice

Bubbler System Monitor head loss

AirBurst Systems

Literature Review

• Testing has been performed on wedgewire screens for decades• Alden Lab performed study of 0.5 and 1.0mm slot

wedgewire screens on behalf of EPRI• Egg and larvae were excluded in most cases

considered• The screen performance in estuarine environments

was impacted by the maximum slot velocity & the ratio of maximum to slot velocity

Gunderboom MLES

MLES™ Aquatic Filter Barrier | Gunderboom

Basic System :• Full-water-depth filter curtain comprised of treated polypropylene/polyester fabric• Suspended by floatation billets on the water's surface• Patented systems

EPA 316(b)

MLES™ Aquatic Filter Barrier | Gunderboom

FlotationEngineered for current water level and service life

Mooring system/ Structural supportAnchors design to the substrate

Filter materialStrong, precise, and durable porous filter

Strengthening ElementsThe “skeleton” of the system

EEG Total Water Supply

Intake Structure Equipment

Turnkey Solutions Water supply on demand

EEG Total Water Supply

Intake Structure Equipment

Turnkey Solutions Water supply on demand

SCOPE

• Design• Equipment• Commissioning

• Design• Equipment• Commissioning• Installation

• Design• Equipment• Commissioning• Installation• Service• “Selling Water”

Case Study: Traveling Screen Retrofit

Project:Cooling water intake system

Problem:Fish concerns & maintenance on traveling screens

Solution:New wedgewire screen with low velocity to avoid clogging.AirBurst™ SystemInstallation

Payback:24 months

Case Study: Raw Water Intake

Project:Raw water supply for a complicated waterway

Problem:The system required complicated screen:pump interaction

Solution:Turnkey design led by the pump team performed the conceptual design, site design, modeling, and execution

Benefit:Fast project performed under planned budget

Case Study: Flat Panel Wedgewire Array

Project:Fish Passage Screening

Problem:A hydro project required fish friendly screening for a fish attraction facility

Solution:A bank of wedgewire screens with a custom airburst system

Benefit:Successful project with “best screens USACE had ever seen” ahead of schedule

Case Study: 316(b) for Oil & Gas

Project:Oil & Gas Terminal

Problem:An Oil & Gas developer was preparing an offshore terminal.

Solution:A CFD analysis of the site & development of an innovative sensor scheme. Also provided technical & communication strategy support.

Benefit:Practical & constructable modification to the screen to comply with regulations.

Case Study: Thermal Power Hatchery Intake

Project:Thermal Power Intake

Problem:A regional power utility needed to modify their intake structure to comply with regulation.

Solution:A turnkey equipment package including screens, piping, and an airburst.

Benefit:Successful project integrated with existing work ahead of schedule

Case Study: Aquatic Filter Barrier

Project:Fish protective filter for art project

Problem:Fish concerns for public art project

Solution:Aquatic filter barrier system to protect fish eggs & larvae

Benefit:Enabled project to progress