This Calculation is intended to satisfy engineering requirements for maximum 60-minute precipitation amounts for 50 and 100-year return periods at and near Yucca Mountain. This data requirement is documented in the ''Interface Control Document for Support Operations to Surface Facilities Operations Functional and Organizational Interfaces'' (CRWMS M&O 1998a). These developed data will supplement the information on 0.1 hour to 6-hour (in 0.1-hour increments) probable maximum precipitation (PMP) presented in the report, ''Precipitation Design Criteria for Storm Water Management'' (CRWMS M&O 1998b). The Reference Information Base (RIB) item, Precipitation ''Characteristics for Storm Water Management'' (M09902RIB00045 .OOO), was developed based on CRWMS M&O (1998b) and will be supplemented (via revision) with the information developed in this Calculation. The ''Development Plan for the Calculation: Precipitation Characteristics for Storm Water Management'' (CRWMS M&O 2000) was prepared in accordance with AP-2.l3Q, ''Technical Product Development Planning''. This calculation was developed in accordance with AP-3.12Q, Rev. O/ICN 2.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.

Photograph of a scene during the American Indian Exposition, at the Caddo County Fairgrounds.