FLOOD10070

• County: Larimer
• Community: Fort Collins
• Basin: South Platte
• Title: Master Drainage Plan Update Colorado State University
• Date: 1/1/1998
• Prepared For: Fort Collins
• Prepared By: Ayres Associates
• Floodplain - Doc Type: Floodplain Report/Masterplan

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TABLE OF CONTENTS

INTRODUCTION ........................................................................................................................1

ANALYSIS OF THE 1997 STORM EVENT.................................................................................2
REVIEW OF THE PROPOSED MASTER PLAN ......................................................................13
PROPOSED MASTER PLAN REVISIONS ............................................................................... 14
SUMMARY AND CONCLUSiONS............................................................................................18

LIST OF FIGURES

Figure 1. Rainfall hyetograph. .................................................................................................... 3

Figure 2. Areas of campus inundation. ......................................................................................4

Figure 3. Drainage area and isohyetal map. ..............................................................................6

Figure 4. Hydrographs of canal overtopping. .............................................................................8

Figure 5. Storage-discharge-elevation data for lagoonllibrary parking 101................................... 9

Figure 6. Storage-discharge-elevation data for the heating plant/oval area. ............................10

Figure 7. Storage-discharge-elevation data for the College Avenue Gym................................ 11

Figure 8. Proposed student center improvements, ..................................................................16

Figure 9, Enlarged detention area west ofthe student center. .................................................17

Ayres Associates