1 Site Description Report Hawthorn Plant 8700 Hawthorn Road Kansas City , MO 64 120 March 3 , 2009 1.0 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 th e cooling water intake structure (CWI S) technologies in use at facilities, including the site

specific characteristics of each facility and how these affect the selection and performance of CWI S technologies. EPA is also visiting facilities to better unde rstand 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) Hawthorn Plant
. 2.0 Facility Des cription Hawthorn was dedicated in 1956 and is owned and operated b y KCP&L . It is located on a 55 0 acre site on the Missouri River, nine miles northeast of downtown Kansas City , Missouri. It employ s approximately 1 5 0 people. According to KCP&L’s web sit e, power generation at Hawthorn represents 26% of the compan y’s total production capacity. Cooling and process water withdrawals from and wastewater discharges to the Missouri River are regulated under NPDES permit number MO0004 855 which expired on Ju ly 27 , 200 5
. Hawthorn submitted its NPDES permit application in a timely manner and is awaiting renewal of its permit by the state. 3.0 Electricity Generation and Transmission Hawthorn has four retired boilers and one coal

- fired, steam

- electric generating uni t. Hawthorn’s baseload unit, Unit 5, was upgraded to 56 3 MW and also retrofitted with additional air controls in 2001. The fuel source for Unit 5 is low sulfur Powder River Basin coal. In addition, Hawthorn also has a combined cycle unit, Unit 6/9 , with a total generating capacity of 2 66 MW.2

4.0 Cooling Water System and Intake Structure Hawthorn has two CWI S s that provide once

- through cooling water for its generating unit s . The CWI S for Unit 5 has two coarse mesh (3/8”) traveling screens with a design intake flow (DI F) of 91,500 gpm per screen (total of 263.5 mgd) . The design through

- screen velocit y is 3.1 feet per second (fps). The CWI S for Unit 6/9 is fitted with a trash rack and three standard (i.e., coarse mesh 3/8”) traveling screens. In addition, three circulating water pumps provide a design flow per screen of 34,000 gpm (total of 146.9) of cooling water to the generating unit. The through screen velocity is 2.1 fps. Hawthorn inspects its traveling screens annuall y. It also cleans and rebuilds e ach screen every

two years (one each year) during its routine maintenance outage period. 5.0 Impingement and Entrainment Information KCP&Lrepresentatives did not provide any information on impingement, entrainment or source water body characterization f

or this site. 6.0 Cooling Tower Feasibility KCP&Lrepresentatives indicated that some of the available land at Hawthorn is designated as being in a floodplain and therefore unavailable for construction
. There is additional land outside of the floodplain that is permitted for a potential future landfill that is unavailable for siting a cooling tower. 7.0 Debris Handling As with other facilities located on the Missouri River, debris can be significant at Hawthorn. 8.0 Repowering/Future Uses Hawthorn has no sho rt term plans for re

- powering or upgrading. 9.0 Cooling Ponds Hawthorn does not have any cooling ponds. 10.0 Ownership Hawthorn is owned b y KCP & L a subsidiary of Great Plains Energy
. KCP&L Greater Missouri Operations Company is also a subsidiary

of Great Pl ains3 Energy
. Both subsidiaries operate under the KCP&L brand name. 11.0 316(a) EPA did not collect any

information related to 316(a)
. 12.0 Ash Handling Hawthorn beneficiall y uses its bottom ash to a local kiln for use in cement. Fly ash from the baghouse and scrubber are handled dry and are re

- used in mine reclamation. 13.0 Air Emissions Controls According to the KCP&L website, Hawthorn uses state of the art BACT to control air emissions on Unit 5 and has 88 percent lower NOx, 99 percent lower particulate matte r, and 92 percent lower SO2 emissions than would an uncontrolled facility
. Unit 5 achieves reduced emissions through use of an SCR , scrubber and baghouses.