Surface Water Management
WELCOME To The
Genesee County Drain Commissioner

Genesee County Drain Commissioner
Surface Water Management

Design Information

Design Standards

Design ParametersOpens a new window Date Effective 6/1/2018. (examples on last page were clarified in 2019)
Site Plan Submital SheetOpens a new window (Please submit a completed form with all plan submitals. A review will not be completed without a complete form. Effective date 12/15/2021 updated 5/6/2022)

Design Aids

90 Percent Non-Exceedance storm memoOpens a new window for Requirement A
Rainfall Frequency Atlas of the MidwestOpens a new window for Requirement B
MDEQ spreadsheetOpens a new window to assist w/ calcs for Requirement B
Low impact Development ManualOpens a new window by SEMCOG

Link to page with individual Chapters

Plan Submital

Genesee County Surface Water Management Division requires one set of plans to be submited to 4608 Beecher Rd., Flint MI 48532 for all projects that impact a County Drain or Genesee County Road Commission Drainage System. There is no review fee and plans typically take 2-3 weeks to review.

Permits and Review Forms

GCDC Drain PermitOpens a new window: Required whenever any work is to be done within a county drain easement.
Checklist for Public StormOpens a new window: Before any storm can be dedicated to this office and made public, all the items on our Checklist for Public Storm must be complete.
Pond ReviewOpens a new window: Review submital for private pond construction not for detention.
Requires the following:

8.5" x 11" or 8.5" x 14" paper drawing
Property drawing with dimensions
Approximate location & size of permanent structures
Location & size of pond
Detail of what will be done with spoil pile (dirt)
Show where the water will flow when pond is full
Property location to nearest crossroads
Owners name, address, phone number
North arrow

Pre Qualified Contractors List

The purpose of this pre-qualification process is to develop and maintain a list of pre-qualified contractors to perform non-petitioned maintenance work on behalf of the Genesee County Drain Commissioner and the various drainage districts under the jurisdiction of the Genesee County Drain Commissioner.

County Drain Specifications

Contract Documents: Beginning June 1, 2006 the contract books no longer include the General Conditions and our Standard Specifications. They can be printed from this site for free or for a $5.00 fee, a printed copy can be provided upon request. Also all work done for GCDC-SWM must comply with SESC manual for GCDC-SWM projects. Version 2018

General ConditionsOpens a new window (90 kb)
Standard SpecificationsOpens a new window (441 kb)
SESC manualOpens a new window

Civil 3D 2017 DrawingOpens a new window
Land Desktop 2007-2017 DrawingOpens a new window

Standard Details

GCDC SWM has found several construction practices acceptable in the past. The following are few of the Standard Details that can be used.

Bag Headwall DetailOpens a new window: For end treatments for culverts.
Tap-In Detail:Opens a new window Suggested detail for tapping into a GCDC storm sewer pipe.
MDOT R086DOpens a new window detail: Concrete Pipe End Section installation
Stand Pipe Detail:Opens a new window Suggested detail for stand pipe.