Blacksnake Creek Stormwater Separation Improvement

Blacksnake Creek Stormwater
Separation Improvement Project
City of St. Joseph, Missouri
Public Meeting
January 26, 2016
Project Goals Focus On…
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Compliance with regulatory mandate
Cost‐effectiveness, best value
Corridor restoration
Integrating project elements to save money
Listening/collaborating with the public
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Agenda
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Combined Sewer Overflow Program Background
Blacksnake Creek Stormwater Separation Project Overview Overview of Road Improvements
Project Vision and Next Steps
Open House
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Why is the City Doing this Project?
Blacksnake Watershed
Combined Sewer Overflow (CSO) Program
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St. Joseph has a Combined Sewer System and the Sewer Overflows when it Rains
Sanitary
Sewer
Storm
Sewer
Water Protection Facility
Graphic obtained from Kansas City, Missouri
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Federal and State Mandates Require the City to:
• Reduce combined sewer overflows
• Continue meeting regulatory requirements
• Agree to a compliance plan and schedule
Mitchell CSO Outfall
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Initial Phase of the Combined Sewer Overflow Program Consists of Several Projects
PROJECT
Long Term Control Plan
Facilities Plan
Roy’s Branch Sewer Separation – Phase II
Completed (typical)
Wet Weather Disinfection
and Effluent Pump Station
Whitehead Creek Stormwater Separation
Blacksnake Creek
Stormwater Separation
Future Projects (4 projects)
In Progress
Future
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BLACKSNAKE CREEK STORMWATER
SEPARATION IMPROVEMENT PROJECT
Project Overview
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Blacksnake Creek Separation is Required by CSO Control Program
• Sends portion of Blacksnake stormwater direct to river • Reduces Operations & Maintenance
• CSO Program compliance
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Not Simple –
What Couldn’t be Done
• Open channel for entire alignment
• Complete separation of sewage and storm flow for watershed
• Replacement of existing combined sewer
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BLACKSNAKE PROJECT ELEMENT
Stormwater Conveyance
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Alignment Selected in Conceptual Design Will…
• Minimize project and O&M costs
• Minimize private property acquisition
• Maximize cost‐effective community enhancement opportunities
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Near Surface Conveyance Alignment Minimizes Disruption to Residents and Property Impacts 13
Near‐Surface Conveyance Technology Selection will be Determined by Flows and Construction Market
• Base project conveys CSO flows as required by mandate
• If funding is available, ultimate vision would use larger pipes to support flood control
• Multiple technologies will be allowed, with Contractor bid price driving selection
– Best value
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Deep Conveyance Tunnel is Less Disruptive to Developed Areas and Supports Gravity Flow
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Tunneling Provides a Cost‐Effective Means to Convey Flow Beneath Existing Infrastructure and Challenging Topography
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Open Stream Channel, Where Feasible, Provides Dual Value – Conveyance and Public Amenity
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Maximize Use of Open Channel Flow Where Feasible
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Cost effective Natural solution
Provides an amenity
Not suitable at very high flows or in constrained areas
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BLACKSNAKE PROJECT ELEMENT
Roadways
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Stormwater Improvement will be Coordinated with Nearby CIP Road Projects
• Funded through 2013 Capital Improvements Sales Tax
• Enhance public safety
• Coordinate hydraulic & construction impacts of roads with conveyance project
Integrated Projects will Improve Efficiency!
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Karnes Road/Northwest Parkway Project will Enhance Public Safety
• Eliminate dangerous 6‐way intersection at Karnes Road
Karnes Road
• Eliminate O&M for Northwest Parkway bridge
• Improve connectivity with Krug Park
• Extend the existing Urban Trail System
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Cook Road Realignment Project will Improve Vehicular Circulation
• Supports plan for Cook Road as east‐west minor arterial
• Eliminate O&M for Savannah Road culvert
Realign Creek
Cook Rd
• Coordinate culvert hydraulics with conveyance project
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BLACKSNAKE CREEK STORMWATER
SEPARATION IMPROVEMENT PROJECT
Vision and Next Steps
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Blacksnake Project Provides Opportunities for the Northside Community
• Integrate projects to improve efficiency & effectiveness
• Invest in the northside of St. Joseph
• Restore the corridor ‐ better than we found it!
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Vision of Base Project • Achieve CSO control mandate & provide community benefits • Maintenance road/nature trail in corridor
• Maximize open channel streams
• Green solutions to manage stormwater at its source
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Ongoing Focus on Integrated Project Vision
Example Basin Concept
• More benefits at lower cost
• Dependent on alternative financing/funding • Detention basin and flood control conveyance
• Ultimate vision would provide flood control for 100‐year storm event
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Where are We in the Design Process for Conveyance and Roads?
PROJECT
2014
2015
2016
2017
2018
2019
Conceptual Design
Initiate Road‐related Land Acquisitions
Public Meeting No. 1
Preliminary Design
Surveying & Phase I Geotechnical Investigations
Phase II Geotechnical Investigations
Initiate Conveyance and Road Easement Acquisition
Public Meeting No. 2
Detail Design
Bidding Period for Construction
Award Construction Contract
Construction
CSO Project Compliance Deadline
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Land and Easement Acquisition is Important for this Project
• Phased acquisition process
– Initiated road acquisition – late 2014
– Initiating road & conveyance easements now
– Voluntary sales considered on an individual basis
• Temporary and permanent easements
• Project maps available –
Open House
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BLACKSNAKE CREEK STORMWATER
SEPARATION IMPROVEMENT PROJECT
Open House
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Project Team Wants to Answer Your Questions and Receive Feedback
• Project Goals & Benefits
• Project Overview
• Stormwater Separation Alignment
• Land and Easement Acquisition
• Green Solutions
• Detention Basin (US Army Corps of Engineers)
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OPEN HOUSE
City of St. Joseph, Missouri
Public Meeting
January 26, 2016
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