FLOOD02086

• County: Gilpin
• Community: Black Hawk/ Central City
• Title: Black Hawk/Central City Colorado Radar Rainfall Reconstruction
• Date: 7/30/1998
• Prepared For: Gilpin County
• Prepared By: HDR Engineering, Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

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TABLE OF CONTENTS

1.0 Introduction ...............................................................................Page 1

2.0 General radar-rainfall estimate methodology ....................Pages 2-3

2.1 Event specific radar-rainfall estimate methodology.......Pages 3-5

3.0 Conclusions................................................................. ..Page 6

LIST OF TABLES

Table 1. Relationship between peak 6-minute rainfall rates and radar reflectivity
values (dBz).

Table 2. Relationship between radar reflectivity values (dBz) and HDR derived
radar reflectivity levels.

LIST OF FIGURES

Figure 1. Grid containing HDR radar-estimated rainfall.

Figure 2. Blown up portion of the grid that contains Unnamed Gulch.