Mohave County

Public Works Department and Flood Control District

American Public Works Association (APWA) Accredited

61st Arizona Conference on Roads & Streets April 5, 2012

Steve Latoski, P.E., PTOE Public Works Director

Nick Hont, P.E. Development Services Director, Flood Control Chief Engineer

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American Public Works Association Accredited

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Maintains 2,071 road centerline miles (784 mi. paved) Performs road surface maintenance and preservation activities:

Repair potholes Seal transverse and longitudinal cracks Apply chip seal treatment (23 miles scheduled in FY 12)

Operates fleet of 19 motor graders over 3,500 miles per month to perform unpaved road maintenance

Road Division

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Maintains 28,100 traffic control signs Maintains 844 linear miles pavement markings and 669 special

pavement markings Installs traffic control signs on square telescoping posts for

improved maintenance and service life resulting in $15,000 annual savings to previous use of U-channel sign posts

Traffic Control Division

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Capital (structural) Pavement Preservation Program Completed engineering assessment of structural stability for 308

centerline miles of County regional highways, arterials, and major collectors

Soliciting Request for Proposal on multiple pavement preservation treatment products to collectively treat an array of pavement structural section conditions: Glass fiber pavement surface treatment Nonwoven geotextile pavement surface treatment Geosynthetic grid-like “fabric” subsurface treatment Fiber reinforced subsurface treatment Chemical stabilizers applicable to good and poor subgrade soils

Engineering Division

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Complete CR 91 Beaver Dam bridge replacement – $7.7 million Programmed Bank Street widening – $1.5 million County Route 1 intersection preliminary design - $250,000 HRRRP traffic safety improvements - $1 million

Road Construction Projects

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Delivered through full service operations and maintenance contracts providing 24/7 operations

Operating 2 landfills handling 120 tons per year Operating 2 water systems producing 600 million gallons per year

Solid Waste and Water Operations

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In Progress Public Works Building – 38,830 s.f. at $6 million Programmed Arnold Plaza demolition – 22,000 s.f.

Building Projects

A primary network (55 pts.) of published NGS control has been established

7 Base Stations have been installed.

CORS (Continuously Operating Reference Stations)

High precision is an affordable reality

Network is operational as of Mid March 2012

Free Service to the survey & engineering community

MOHAVE COUNTY RTN

Golden Valley Sacramento Detailed Study 477 square miles new

hydrology 5 recurrence intervals (10,

25, 50, 100 $ 500 yr) 19 miles of new stream

hydraulic analysis Submitted to FEMA Feb 2012

NORTH LAKE HAVASU Detailed Study FEMA maps not updated

since 1982 5 recurrence intervals (10,

25, 50, 100 $ 500 yr) 12 miles of new stream

hydraulic analysis Scheduled to submit to

FEMA April 2012

Mohave Valley Risk Map Project Cooperating Technical Partners (CTP)

with FEMA $350,000 FEMA Grant Funding $500,000 Total Project Cost Revise Current Digital Flood Insurance

Rate Map (DFIRM) mapping to reflect the current ground condition

Follow up project for the Mohave Valley Watershed Strategic Planning Study (WSPS)

Submitted to FEMA August 2011, currently in review

Additional FEMA Grant Funding of $350,000 for a subsequent phase is in the discovery process now

Watershed Strategic Planning Studies Reconnaissance Level

FLO-2D Analysis Golden Valley Mohave Valley North Kingman North Lake Havasu

Drainage Infrastructure Maintenance Regular Inspections Uses both private contractors

and county personal Tracked using MCFCD

infrastructure database

Grace Neal Channel Mitigate flooding in

the North Kingman area.

Excess material will be used to build the road prism for the future Grace Neal Parkway.

Approximately follows the historic drainage path.

Quail Run Repeated Flooding Subdivision Lacks

Positive Drainage Completed March 2012

Jagerson Avenue - Suffock Wash Roadway and

Drainage Project Improve Access to

Mohave Community College Campus

Mitigate Uncontrolled Flooding

Horizon Six – Mockingbird Wash Lake Havasu City

Area Repeated Flooding

Problems October 2010

Flooding Detention Basin

Project Upstream

Horizon Six – Detention Basin Over 14 Acres of

Property Construction

Summer and Fall 2012

Retains up to the 25-Year Event

AFWS Weather Camera Installed To Monitor Storm Events

Moccasin Culvert Primary Access to Moccasin, AZ Severe Erosion Issues Mohave County Public Works

Project Funded By MCFCD

Tierra Del Rio – Primavera Loop Repeated Flooding

Events Major

Sedimentation and Erosion Issues

Detention/Retention Basins

Reduced Sediment Transport

Street Reconstruction

Construction Summer 2012

Sunrise Vistas Existing Unmaintained

Channels Lack of Adequate ROW Flood Damage to 2009

Microburst Event Currently in design phase

ALERT Flood

Started in December 2001 138 Automated Sites with

over 300 total sensors 131 Sites Record

Precipitation Data 46 Stream Flow Sensors 16 Full Weather Stations 6 Road Surface Sensors

(Temperature and Moisture) Pre-set Alarm Values Trigger

Notification of Emergency Personnel.

7 Weather Cameras

NOAA-Port Ground Station Data Collection Forecasting Satellite Imagery NEXRAD Radar

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Questions