FLOOD11631 ‎(2)‎

• County: Costilla
• Community: Costilla County
• Stream Name: Rio Grande, Trinchera Creek, Culebra Creek, Costi
• Basin: Rio Grande
• Title: Floodplain Information Report - Costilla County
• Date: 3/1/1989
• Prepared For: Costilla County, CWCB
• Floodplain - Doc Type: Floodplain Report/Masterplan

TABL~ O~' CONTENTS
Pase
Preface
1.0 Introduction ................................. 1
1.1 Purpose ................................ 1
1.2 Authorization .......................... A
1.3 Acknowledgments ........................ 2
1.4 Related Flood Studies .................. 2
2.0 Study Area ................................... ~
2.1 Location ............................... ~
2.2 Human Settlement ....................... ~~
2.3 Study Reaches .......................... ;~
2.4 Rio Grande Basin ....................... ~~
2.5 Trinchera Creek Basin .................. l~i
2.6 Culebra Creek Basir~ .................... 13
2.7 Costilla Creek Basin ................... 13
2.8 Summary of Drainage Areas .............. 1~
3.0 Hydrologic Analysis .......................... li'
3.1 Flood Characteristics .................. 1'7
3.2 Historical Review ...................... 1'i'
3.3 Stream Gage llata ....................... 2C-
3.4 Reservoirs ............................. 2~
3.5 Irrigation Ditches ..................... Z~
3.6 Peak Flows ............................. 2E+
4.0 Hydraulic Analysis ........................... 3~
4.1 Base Mapping ........................... 3~
4.2 Flood Depths ........................... 3a
4.3 Review in the Field ..................... 31
4.4 k'looded Areas ...................o...... 31
5.0 Interpretation and Use of Report ............. 34
5.1 Flood Discharges ....., .............a.... 34
5.2 Flooded Area Maps ...................... 34
5.3 Structural Measures .................... 35
5.4 ~+Ieasures that Reduce Vulnerability ..... 35
5.5 Measures that Minimize Impacts ......... 36
6.0 Bibliography ................................. 38