Ewing Intercounty Drain Hearing of Necessity July 14, 2020 Ewing - - PowerPoint PPT Presentation

Ewing Intercounty Drain

Hearing of Necessity

July 14, 2020

Ewing Intercounty Drain Drainage Board

Michigan Department of Agriculture & Rural Development Isabella County Drain Commissioner Midland County Drain Commissioner

Presentation Overview

• Why Are We Here?
• Drain History
• Drain Overview
• Drainage District Overview
• Study Purpose
• Drainage Issues (Exist. Conditions)
• Evaluation of Alternatives
• Recommendation
• Lands Added / Removed
• Next Steps

Why Are We Here?

• A petition for improvements to the Ewing Intercounty Drain (Drain) was

circulated per Chapter 8 of the Michigan Drain Code, Public Act 40 of 1956, as amended.

• The petition was determined “Practicable” at Hearing of Practicability (HOP)

held by Ewing Intercounty Drain Drainage Board (Drainage Board) on October 28, 2019.

• Specifically, landowners were concerned about, property flooding, sediment

and debris within the drain, lack of an adequate outlet and the general condition of the Drain.

• Michigan Drain Code mandates that as part of the petition process, the

Drainage Board must schedule and hold a Hearing of Necessity (HON).

Drain History

North

• Established prior to 1900
• 1900 – Drain limits includes 850-ft of

Swain ICD and “Branch” along Walton Road.

• 1907 – Drain limits includes Swain ICD

downstream to Little Salt ICD.

• 1949 / 1975 – Drain limits match what is

currently understood to be the Drain.

Drain Overview

• Tributary to the Swain ICD
• Drain Length – 4.1 Miles
• 1,184 Acre Watershed
• Jasper Twp. (Midland County),

Coe Twp. (Isabella County)

• Includes Branch in Isabella

County

• Loamy Soils (High –

Moderately low Infiltration Rates)

• Mix of Agriculture, Forest,

Wetland

North

Drainage District Overview

• 1,184 .1 Acre Drainage

District:

• 815.6 Acres (68.9%)

Midland County.

• 368.5 Acres (31.1%)

Isabella County.

North

Study Purpose

Comments from October 28, 2019 Practicability Hearing:

• Property flooding / tile outlets

under water in the upper reaches of the Drain.

• Significant amount of sediment

and woody debris in the Drain.

• Concern regarding the capacity
• f the receiving stream (Swain).

North

Study Purpose

Goals of Engineering Study:

• Assess condition / capacity of the Drain.
• Identify impairments to the Drain.
• Evaluate improvement alternatives to:
• Landowner concerns identified in HOP.
• Address issues related to public health,

convenience, and welfare.

Drainage Issues

Woody debris obstructions in the Drain:

• Reduce hydraulic capacity.
• Increase frequency of

flooding.

• Promote channel instability

(erosion).

Station 10+00

Drainage Issues

Woody debris obstructions in the Drain:

• Reduce hydraulic capacity.
• Increase frequency of

flooding.

• Promote channel instability

(erosion).

Station 27+00

Drainage Issues

Woody debris obstructions in the Drain:

• Reduce hydraulic capacity.
• Increase frequency of

flooding.

• Promote channel instability

(erosion).

Station 49+50

Drainage Issues

Woody debris obstructions in the Drain:

• Reduce hydraulic capacity.
• Increase frequency of

flooding.

• Promote channel instability

(erosion).

Station 58+00

Drainage Issues

Woody debris obstructions in the Drain:

• Reduce hydraulic capacity.
• Increase frequency of

flooding.

• Promote channel instability

(erosion).

Station 75+00

Drainage Issues

Woody debris obstructions in the Drain:

• Reduce hydraulic capacity.
• Increase frequency of

flooding.

• Promote channel instability

(erosion).

Station 83+50

Drainage Issues

Woody debris obstructions in the Drain:

• Reduce hydraulic capacity.
• Increase frequency of

flooding.

• Promote channel instability

(erosion).

Station 110+00

Drainage Issues

Woody debris obstructions in the Drain:

• Reduce hydraulic capacity.
• Increase frequency of

flooding.

• Promote channel instability

(erosion).

Station 129+00

Ewing Intercounty Drain):

• Sediment Build-up: More than 2-feet of sediment deposition, reducing

hydraulic capacity of Drain and obstructing flow, thereby, increasing frequency of flooding.

Drainage Issues

Channel Profile from Sta. 16+00 to 27+50

Sediment Obstruction Water Surface 2/20 Historic Grade

Ewing Intercounty Drain):

• Sediment Build-up: More than 2-feet of sediment deposition, reducing

hydraulic capacity of Drain and obstructing flow, thereby, increasing frequency of flooding.

Drainage Issues

Sediment Obstruction Water Surface 2/20 Historic Grade

Channel Profile from Sta. 37+00 to 49+00

Ewing Intercounty Drain:

• Sediment Build-up: More than 2-feet of sediment deposition, reducing

hydraulic capacity of Drain and obstructing flow, thereby, increasing frequency of flooding.

Drainage Issues

Sediment Obstruction Water Surface 2/20 Historic Grade

Channel Profile from Sta. 85+50 to 97+00

Drainage Issues

Ewing Intercounty Drain:

• Undersized & Failing / Aging

Infrastructure:

• Many crossings along Walton

Road have < 10-year hydraulic capacity.

• Several culverts are improperly

set and restricting flow / backing up water in the Drain, thereby, increasing frequency of flooding.

• Many crossings are in poor /

failing condition.

Drainage Issues

Ewing Intercounty Drain:

• Undersized & Failing / Aging

Infrastructure:

• Many crossings along Walton

Road have < 10-year hydraulic capacity.

• Several culverts are improperly

set and restricting flow / backing up water in the Drain, thereby, increasing frequency of flooding.

• Many crossings are in poor /

failing condition.

Channel Profile from Sta. 171+00 to 178+00

Perched Culvert Culvert with Backfall

Drainage Issues

Ewing Intercounty Drain:

• Undersized & Failing / Aging

Infrastructure:

• Many crossings along Walton

Road have < 10-year hydraulic capacity.

• Several culverts are improperly

set and restricting flow / backing up water in the Drain, thereby, increasing frequency of flooding.

• Many crossings are in poor /

failing condition.

Coleman Road Culvert Private Culvert – Sta 197+00

Evaluation of Alternatives

Evaluate Improvement Alternatives to:

• Ensure Ewing Intercounty Drain provides an

adequate outlet for the District.

• Manage / Eliminate areas of localized flooding.
• Remove / Replace failing infrastructure.

Evaluation of Alternatives

Alternative 1: Do Nothing

• Intercounty Drain Drainage

Board could conduct routine maintenance (limited to $25k annually) along established Drain.

• Failed crossing infrastructure

would be replaced by responsible parties (road commission, township, property owners, etc.).

North

Evaluation of Alternatives

Alternative 2: Limited Improvements along Established Drain

• Goal is to address impairments

along the upstream end of the Drain.

• Includes the following:
• Approximately 2.5 Miles of Open

Channel Excavation along the Main Drain and Branch.

• Culvert / pipe replacement of

improperly set, undersized, or failed crossings upstream of County Line Road.

• Estimated cost: $250k (excluding

administrative and financing costs)

North

Legend:

Open Channel Excavation Culvert Replacement Riprap End Treatment

Evaluation of Alternatives

Alternative 3: Conveyance Improvements along Established Drain

• Provides a comprehensive plan to

address impairments along the entire length of Drain.

• Includes the following:
• Approximately 4.0 Miles of Open

Channel Excavation along the Main Drain and Branch.

• Woody Debris Management throughout

Drain.

• Culvert / pipe replacement of improperly

set, undersized, or failed crossings throughout Drain.

• Estimated cost: $390k (excluding

administrative and financing costs)

North

Legend:

Open Channel Excavation Woody Debris Management Culvert Replacement Riprap End Treatment

Recommendation

Alternative 3: Conveyance Improvements along Established Drain

• Only alternative to address

all landowner concerns expressed at Hearing of Practicability.

North

Legend:

Open Channel Excavation Woody Debris Management Culvert Replacement Riprap End Treatment

Lands Added / Removed

Add 347.99 Acres Remove 78.33 Acres Historic District 914.43 Acres

26.76% Isabela County 73.24% Midland County

Revised District 1,184.09 Acres

31.12% Isabella County 68.88% Midland County

Next Steps

Board to decide if petition is necessary:

• If the Board finds that the petition is not necessary, the project ceases

immediately and no petition can be heard for the same project until 12 months have passed.

• If the Board finds that the petition is necessary based on health, welfare or

convenience, the Board proceeds with a project (the scope of which will be defined later). Each project is unique, however, in accordance with the Drain Code, the following tasks must be completed:

1. Complete Engineering Design 2. Obtain Easements (if necessary) 3. Apply for Permits (if necessary) 4. Bid Project 5. Hold Day of Review 6. Construct Project

QUESTIONS?