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Sanford Dam

The Sanford Dam is located on the Tittabawassee River approximately 11 miles upstream of Midland, Michigan. It is the most downstream of the four dams. The Sanford Dam was built to provide water level control for the purpose of hydro-electric power generation and received its original license from FERC in 1987. On May 19, 2020, the Sanford Dam was overtopped by increased flow from the upstream Edenville Dam breach. This led to the Sanford Dam failure.
Source: Four Lakes Lake Level Study by Spicer Group

Sanford Dam Interim repair measures

sanford dam stabilization measuresSanford Dam interim stabilization measures
  • Stabilize existing breach channel
  • Provide flood protection against erosion of sediment and head cutting up to the 200-year flood event
  • Provide flood control structure consisting of steel sheet pile and large riprap to convey flows around the dam and minimize further head cutting and erosion
  • Additional cleanup sites identified on properties immediately downstream of Sanford Dam
  • Construct debris control boom downstream of stabilization to collect large amounts of debris remaining in the upstream watershed

Quick Facts

$51 million
944
Mid-2025
$1,637
Cost to Repair
Waterfront Properties
Estimated Lake Return Date
Estimated Annual Capital Assessment
Sanford Dam will require demolition of the existing gated spillways and powerhouse and construction of new primary and auxiliary spillways. 
sanford dam repairs
Proposed Plan View of Permanent Repairs
crest gate spillway
Proposed Plan View of Crest Gate Spillway
Proposed Plan View of Right Embankment
Labyrinth Auxiliary Spillway
Proposed Plan View of Labyrinth Auxiliary Spillway
crest gate
Example crest gate with gate closed on the far/left side and the gate open on the right side

​Sanford LAKE RECOVERY AND RESTORATION TIMELINE

Picture

Long-Term Restoration

Critical items
Spillway Adequacy
  • Sanford is classified a high hazard dam. Prior to May 2020 flood, the total spillway capacity was approximately 36,000 cubic feet per second (cfs) before water would begin overtopping embankments
  • Prior State of Michigan 1/2 PMF was 37,000 cfs
    • Based on current on-going studies and recent flood, this will increase
  • FLTF study currently estimating future spillway requirement being 47,500 cfs
  • Spillway requirements still being finalized based on
    • PMP and PMF studies
    • Inflow Design Flood Study
    • State of Michigan Dam Safety Task Force
    • EGLE approval 
Water Retaining Structures
  • The right embankment breached
  • Reconstruct right embankment to meet stability criteria with seepage cutoff wall and internal drainage layers to protect against seepage-induced internal erosion
  • Replace existing Tainter gates with Crest Gates to increase spillway
  • Construct new auxiliary spillway to increase spillway capacity
  • Geotechnical investigations and structural analyses are required to support design of new embankments and repair of existing embankments
  • All water retaining structures will need to be thoroughly evaluated and designed to meet State and federal dam safety standards
Risk-based design approach
  • The IDF/risk-based approach aligns with FEMA guidelines and recommendations of the Michigan Dam Safety Task Force guidelines for Michigan dams
  • Inflow Design Flood that requires these steps:
  1. Site-specific Regional Probable Maximum Precipitation (PMP) studies which are underway.
  2. Perform downstream inundation mapping assuming dam failure for a range of flows starting from the 100-year flood up to the PMF
  3. Determine the incremental hazard increase and consequences of failure for a range of flood flows up to the PMF
  4. Use risk-based, IDF approach to inform the design spillway capacity – no less than 200-year but possibly less than the ½ PMF

Resources

FAQs
Why can't sanford lake come up sooner?
We are running parallel paths to get to the start of construction. A significant amount of work must be done before construction can begin:
  • Independent forensic investigation report
  • Engineering
    • Preliminary engineering reports
    • Inflow Design Flood needs to be established
    • Final design and construction plans
  • Submittal and approval for USDA funding approval
  • Environmental studies and EGLE permitting
  • Bid letting and computation of costs
  • Special assessment hearings and appeals
  • Approval of special assessment roll by county 
Documents
  • ​2/25/2021 | Sanford Lake | Webinar, PowerPoint​
  • 2/10/2021 | Clark Hill PLC to Dave Kepler Re. Part 307 Legal Levels for Secord, Smallwood, Wixom and Sanford Lakes; and the Four Lakes Special Assessment District

  • ​8/5/2020 | Sanford Lake Webinar, PowerPoint​
  • 6/9/2020 | Clarification on Details Related to Sanford and Edenville Dams
Contacts
  • Sanford Lake Association: facebook • website • contact • Tim Holsworth, President
  • ​FLTF Board Representatives: 
    • ​David Kepler, Chair, Sanford Lake, 2020-2022
    • Adam Beebe, Sanford Lake, 2020-2021
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©2021 | Four Lakes Task Force is a US 501 (c)(3) public charity, EIN 27-4698447. 
Four Lakes Task Force
  • About
    • Get Involved
    • History
    • The Dams >
      • Secord Dam
      • Smallwood Dam
      • Edenville Dam
      • Sanford Dam
    • Who We Are >
      • Team Bios
  • Special Assessment District
    • Community Survey
    • Assessment Map
    • FAQs
  • Erosion Control
    • Appeal NRCS Ineligibility
    • Project Financing/NRCS Program
    • Project Map
    • Project Permitting
    • What You Can Do
  • Events
  • Documents
    • Annual Reports
    • County Documents
    • Engineering Reports & Studies
    • Feasibility Study
    • Flyers & Brochures
    • Meeting Presentations
    • News Flashes
    • Newsletters
    • Published Statements
    • Regulatory Correspondence
  • Resources
    • FOIA Request
    • Frequently Asked Questions
    • Subscribe
    • Updates
    • Volunteer Portal
  • Donate
    • Why Donate?
    • Our Donors >
      • Corporate Sponsors
      • Individual Donors
    • Four Lakes Legacy Society
  • Contact