1. Study of Miles City Slough
Internal Drainage and Storm Water Management
October, 2018

2. Project Location
Tongue River Slough

3. FEMA Grant Award-2018. $75,000 FEMA Funding
FEMA Grant Award * $75,000 FEMA Funding * $25,000 Miles City Matching Funds (includes in-kind match) $100,000 Total Project Cost Purpose: Completion of a Storm Water Management Plan that will help the Miles City community with internal drainage needs. Timeline: Work to begin in early 2019 and will be completed within 1 year
Outcomes include:
Participation of agencies, stakeholders and the public
Hazard identification and risk/vulnerability assessment
Identification of mitigation strategies – ability to identify “shovel ready” projects for additional funding
Plan Adoption
Plan Maintenance

4. Scope Collect and analyze data
Survey cross-section at key points
Build existing conditions model
Identify significant deficiencies with Tongue River Slough
Restrictions causing flooding / backwater (Culverts undersized or lacking at road crossings)
Lack of Storm water storage capacity (Slough needs cleaning)
Inability to discharge when outfalls are submerged

5. Scope Analyze various alternatives to remedy deficiencies
Alternatives could include
Upgrading storm drain pipes
Increasing capacity of Slough (regrading/cleaning up)
Improving culverts at road crossings
Adding emergency storage
Improving river outfalls
Adding storm water pumping systems
Draft Storm Water Master Plan and Summary of Findings
Public Review and Comment
Finalize Storm Water Master Plan

6. Questions? Input?
Dan Richardson, PE, Civil Water (406) (office); (406) (cell) Samantha Malenovsky, Floodplain Administrator (406) (office)