Site Description Report

	Iatan Plant

20250 Highway 45 South

Weston, MO 64098	 

March 3, 2009

Background and Objectives

The Environmental Protection Agency (EPA) is in the process of
developing 316(b) cooling water intake structure requirements that
reflect the best technology available (BTA) for minimizing adverse
environmental impact for all existing power plants and manufacturing
facilities. As part of this process, EPA staff is visiting electric
generators and manufacturers to better understand the cooling water
intake structure (CWIS) technologies in use at facilities, including the
site-specific characteristics of each facility and how these affect the
selection and performance of CWIS technologies.  EPA is also visiting
facilities to better understand cooling water use and specific issues or
technologies that can affect 316(b) compliance.  As part of its site
visit to the Lake Road Plant, EPA also collected information on Kansas
City Power and Light Company’s (KCP&L) Iatan Plant.

Facility Description

Iatan is located 35 miles up the Missouri River from Kansas City in
Weston, Missouri and is owned and operated by KCP&L. The Iatan plant
occupies over 3000 acres and employs approximately 225 people.

Cooling and process water withdrawals from and wastewater discharges to
the Missouri River are regulated under NPDES permit number MO0082996
which expired on February 5, 2009.  Iatan submitted its NPDES permit
application in a timely manner and is awaiting renewal of its permit by
the state.

Electricity Generation and Transmission

The Iatan plant has a single coal-fired steam electric generating unit
with a total generating capacity of around 706 MW.  KCP&L is currently
constructing Iatan 2 adjacent to this site; see Section 8.0 for more
information.

Cooling Water System and Intake Structure

Iatan has one CWIS that provides once-through cooling water for its
existing generating unit.  The CWIS is fitted with a trash rack and six
standard (i.e., coarse mesh 3/8”) traveling screens. Three circulating
water pumps each rated at about 186,000 gallons per minute (gpm) provide
a design intake flow 76,000 gpm per screen (total 653.8 mgd) of cooling
water to the generating unit. Two pumps (four screens) are required to
run at all times. The through screen velocity is 2.27 feet per second
(fps).  A smaller fourth (auxiliary) pump only runs while the unit is
off-line to supply cooling water for the auxiliary system.  

Iatan inspects its traveling screens annually.  It also cleans and
rebuilds each screen every two years on a staggered schedule during its
routine maintenance outage period.    

Impingement and Entrainment Information

KCP&L did not provide any information on impingement, entrainment or
source water body characterization for this site.  

Cooling Tower Feasibility

Cooling water will be supplied to the new generating unit at Iatan 2 via
a mechanical draft cooling tower.  No river water will be used for
cooling this new unit as make-up water will be obtained from collector
wells located 30 feet under the river.

Facility representatives noted that while the Iatan site is large in
terms of acreage, much of the land is designated as wetlands or
floodplain.

Debris Handling

As with other facilities located on the Missouri River, debris can be
significant at Iatan.  

Repowering/Future Uses

As discussed above, KCP&L is in the process of constructing a new 850 MW
coal-fired steam electric generating unit.  KCP&L refers to this as
Iatan 2, a plant adjacent to the existing Iatan Plant.  Iatan 2 will be
a high efficiency, coal-fired unit with a generating capacity of 850 MW.
 KCP&L expects to have Iatan 2 in service in 2010.

Cooling Ponds

	

Iatan does not have any cooling ponds.

Ownership

Iatan Unit 1is majority owned by KCP&L, a subsidiary of Great Plains
Energy.  KCP&L Greater Missouri Operations Company is also a subsidiary
of Great Plains Energy.  Both subsidiaries operate under the KCP&L brand
name.  

KCP&L will own approximately 620 MW of the Iatan Unit 2 capacity with
the remainder jointly owned by other local electric utilities. 

316(a)

EPA did not collect any information on 316(a) for this site.  

Ash Handling

All bottom ash generated at Iatan is beneficially used for use in
cement.  Where possible, fly ash is beneficially used as a cement
substitute or as a stabilizer.

Scrubber wastes associated with the new unit will be placed in an
on-site landfill.  KCP&L representatives commented that there was no
re-sale market for these materials.

Air Emissions Controls

KCP&L did not provide information on existing air controls at Iatan. 
However, Iatan 2 will be fitted with a scrubber, SCR and baghouse and
Unit 1 will be retrofitted with similar air controls during the
expansion.

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