USEPA / AmerenUE

Labadie Power Plant

Intake Structure Site Visit
March 4, 2009 USEPA Intake 

Structure Site Visit

Ameren Corporation General No

 2.4M Customers Facility locations:

 Illinois Iowa Missouri

 Power Plants

 Nuclear: 1 (MO) Coal: 10

 4 (MO), 6 (IL)

 Combined Cycle: 1(IL) Hydro: 3

 1 (IA), 2 (MO)

 CTG – 10 major
March 4, 2009 USEPA Intake 

Structure Site Visit

Ameren Corporation Fossil and Nu

Power Plant Source Waterbodie

 River

 Characteristics

 Large flow Freshwater Inland

 Missouri River – 2 Mississippi River – 4 Illinois River – 2 Wabash River – 1

 Man-made cooling water lake – 2

 Long retention time Managed fishery
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant General No

 Four identical 

steam-generating units: ~2,450 MW

 Began Operation: 

1970-1973

 Capacity Factor: 

81.9% (2008)

 ~34% of AmerenUE 

baseload generation
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Missouri River Overview

 “Big Muddy” – high silt content

 328 mg/L TSS (average 2007-2008) 2,300 mg/L TSS (max, June 2008)

 Longest river in North America

 Length: >2,500 miles Drainage area: ~1/6 of North America

 Historic high flow events:

 1993: 750,000 cfs (USGS Herman gauge) 2008: 338,000 cfs (USGS Herman gauge)

 Average flow: ~64,000 cfs

USGS Herman, 2000-2007
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Intake Structure Design

 Located at edge of navigation cha Water withdrawal average 

~818,400gpm (1,823cfs)

 Design flow = 855,925gpm (1,907 Eight intake bays/pumps
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Original Traveling Screen & Bar Rack 

 Bar rack on 3” center 1.2 fps screen approach velocity 1/2” mesh screens Screen wash discharge to river Screen rotation

 Determined by ∆P “Normal” “Fast” Auto rotation 1/shift
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Intake Structure Debris & Icing Im

 Historic debris issues

 Leaves during Spring and Fall Traveling screen damage

 Historic icing issues Load reduction and outage time Bar rake installation project

 Log and other debris removal Lower load reduction potential
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Existing Intake Structure
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Intake Structure Cross Sectio
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Intake Structure Location
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Intake Structure – Spring 200
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Missouri River Ice & Debris Deflecto
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Missouri River Floating Debris
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Missouri River Floating Debris
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Missouri River Debris Along Ba
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Intake Structure Debris (note size dist
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Intake Structure Trash Rack Collecte
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Eddy Collecting Debris On Irregular 

Trash Rack Face
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Intake Structure Original Irregular S

Trash Rack Face
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Failed 2B Trash Rack – Winter 2
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Failed Trash Rack Removal
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Trash Rack Cleaning Prior to Sprin
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Intake Structure Debris Remov
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Wrecked 3B Intake Pump
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Wrecked Intake Pump

Note 8” Diameter Shaft Twisted 
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Intake Pump 3B Impeller Dam
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Intake Pump 1A Impeller Dama
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Intake Pump 1A Failed Shaft Coupli
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Lower Intake Face Investigation Fo

Rack Design
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Intake Underwater Diverter Va
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Installation of New Trash Ra

Substructure
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

New Trash Rack Upper Structure Ins
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Installation of New Trash Rack 
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Completed Trash Rack – Spring 2
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Traveling Screen Leaf Debris
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Traveling Screen Leaf Debris
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Trash Rake Cleaner Removed De
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Trash Rake Cleaner Removed De
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Trash Rake Cleaning – Note Lo
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Traveling Screen Matted Debri
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Traveling Screen 3/8” Mesh – Note 
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

~2mm Screen – Note Pen
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Replacement Traveling Screen D
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Replacement Traveling Screen D
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Intake Structure Upgrade Proje

 Trash rack repair (2003)

 $50,000

 Trash rack repair and trash rack cleaner

 2005-2006 $2,900,000 

 Traveling screen replacement (2005-2007)

 3/8” Screen Robust design – can be rotated continuously $2,800,000 $400,000 additional cost over in-kind replacement

 Can be retrofitted for installation of potential fish bu

(additional cost)
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

MW Hours Lost Due to Intake Trash R

Traveling Screen Problems

2008 925 0 319 0 

2007 240 543 0 0 2006 2,167 1,573 0 16,199* 2005 5,727 505 5,480 2,597 2004 4,496 943 5,350 7,271 2003 7,260 45,271 7,702 16,968 

2002 19,509 2,987 7,115 29,434 

Unit 1 Unit 2 Unit 3 Unit 4 

* Pump Wreck from damage sustained in earlier 

during low cell water levels
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Intake Impingement Mortality Stu

 Conducted in 2005-2006 No T&E species ~92.9% shad & drum (2005-2006) ~93.2% shad/drum/carp (2005-2006)
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Intake Draft Technology Assessm

 Conducted prior to remand of Phase II Rule Fine mesh screens not evaluated per Phase I Wide slot Cylindrical Wedgewire screens

 Bulkhead mounting (20’ from intake face), 328’ lon 0.5fps approach velocity 30 screens (each 5’Dx17’L) Air backwash system (no provisions for biofouling) $195M (2002 estimated)
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Intake Draft Technology Assessment 

 3/8” mesh Ristroph screens

 1.2fps approach velocity, existing screen bays 3/8” screen mesh New fish return system $4.0M (2002 estimated)

 Modular inclined screens

 2mm clear bar spacing with integral 2” OC trash ra Fish bypass and pump system 7fps approach velocity ~6 hours of maintenance/day $570M (2002 estimated)
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

Fine Mesh Screen Concerns

 Debris loading with fine mesh screens

 Large freshwater inland river Non-point source runoff Entrainment survivability with high debris

 Icing and fine mesh screens Intake expansion potential Unknown impacts on plant reliability Viability of national standard – addition

research needed

 Site-specificity: large freshwater river & 
March 4, 2009 USEPA Intake 

Structure Site Visit

Labadie Power Plant

 Comments and questions