MOCCASIN WASH CULVERT REPLACEMENT

Presentation By:Tim Walsh from Mohave County Public Works

and Ricardo Aguirre from Coe & Van Loo Consultants Inc.

January 13, 2011

Coe & Van Loo Consultants, Inc.4550 North 12th Street

Phoenix, AZ 85014-4291

Phone: 602-264-6831

Fax: 602-264-0928

OVERVIEW

Location

Flood History

Existing Conditions

Basis of Design

Precast vs Cast In Place Culvert Timelines

Example Structures in the Phoenix Metro Area

Design Approach

Proposed Improvements

Construction Easements

LOCATION

FLOOD HISTORY

EXISTING CONDITIONS

BASIS OF DESIGN

Flows from Regression AnalysisQ100 = 3136 cfs

Q25 = 1779 cfs

Drainage Design Manual for Mohave County

PRECAST VS CAST IN PLACE TIMELINES

EXAMPLE STRUCTURES

DESIGN APPROACH SCENARIO 1

DESIGN APPROACH SCENARIO 2

PROTOTYPE DESIGN

UPSTREAM IMPROVEMENTS

DOWNSTREAM IMPROVEMENTS

PROPOSED STEPPED SPILLWAY AND CONTOURS

STILLING BASIN

PROPOSED TEMPORARY CONSTRUCTION EASEMENTS

QUESTIONS ? ? ?

THANK YOU

DESIGN SCHEDULE

COST ESTIMATES