FLOOD11759

• County: Mesa
• Stream Name: Bosley Wash
• Basin: Colorado Mainstem
• Title: Bosley Wash Drainage Master Plan - Phase 2: Alternative Drainage Facility Evaluation - Draft
• Date: 11/1/2002
• Prepared For: Bosley Wash Watershed, CWCB
• Prepared By: HDR Engineering, Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

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Phase 2: Alternative Drainage Facility Evaluation

3.3 CULVERT IMPROVEMENTS .............................................................. ........................... 12

3.3.1 G ROAD CULVERT.... ........................................................................................ 13

3.3.2 SIPHON UNDER GOVERNMENT HIGHLINE CANAL ............................................ 13
3.3.3 BOSLEY WASH ALONG F % ROAD.................................................................... 13
3.3.4 UPRR/HIGHW A Y 6 CROSSING.......................................................................... 14
3.3.5 UPSTREAM ALONG UPRR......................... ......................................... ............... 14
3.4 PROPERTY ACQUISITION ....................................... .......................... ......... .................. 14
3.4.1 STRUCTURES IMPACTED BY FLOODING ............................................................14
3.4.2 PROPERTIES OVER 50% IMPACTED BY FLOODING ............................................ 15
3.4.3 PROPERTIES IMPACTED BY FLOODING .............................................................. 15
3.4.4 FLOOD EASEMENTS........................................................................................... 15
3.5 OPERA 1 JONAL MODIFICATIONS.., ...................................................~........................... 1,)

4.0 ALTERNATIVE DEVELOPMENT ..........................................................................................16

4.1 GENERAL......................................,............................................................................. 16

4.2 100- YEAR SySTEM..................................................................................................... 17

4.3 10- YEAR SySTEM.................... ....... .... ..................................:.................. ................. ... 19

5 .0 RECOMMENDED PLAN .... ...... ... ........... ................... ........ .............. ......... .............................. 21

5.1 SELECTED IMPROVEMENTS .................................................... .................................... 21

5.2 PHASING..................................................................................................................... 23

5.3 FUNDING OPTIONS ............ ......... .................... ...................... .......................................24

5.4 PHASE 3 DIRECTION ................................. ................................................. .................25

Page ii

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