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Low Impact Development Manual for Michigan - OSEH - University ...

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Designer/Reviewer Checklist <strong>for</strong> Vegetated Swales<br />

Type of vegetated swale proposed: _____________________________________________________________<br />

ITEM YES NO N/A NOTES<br />

Can the swale safely (with freeboard) convey the 10-year event?<br />

Are bottom slopes between one percent and six percent?<br />

Are check dams provided <strong>for</strong> slopes > 3%?<br />

Are check dams adequately keyed into swale bottom and sides?<br />

Are two-year and ten-year flows non-erosive?<br />

Will the swale completely drain in 48 hours?<br />

Are side slopes between 3:1 and 5:1 H:V?<br />

Are swale soils loam, loamy sand or sandy loam?<br />

Underdrain provided <strong>for</strong> infiltration swales?<br />

Vegetation and Mannings coefficient selected?<br />

Non-erosive inflow condition(s)?<br />

Erosion control provided during construction?<br />

Maintenance accounted <strong>for</strong> and plan provided?<br />

References<br />

Alameda Countywide Clean Water Program (ACCWP). “Grassy Swales.” Catalog of Control Measures. www.<br />

oaklandpw.com/creeks/pdf/Grassy_Swales.pdf<br />

AMEC Earth and Center <strong>for</strong> Watershed Protection et al. Georgia Stormwater Management <strong>Manual</strong>, 2001.<br />

Cali<strong>for</strong>nia Stormwater Quality Association. Cali<strong>for</strong>nia Stormwater Best Management Practices Handbook: New<br />

<strong>Development</strong> and Redevelopment, 2003.<br />

Caraco and Claytor. Stormwater BMP Design Supplement <strong>for</strong> Cold Climates, 1997.<br />

Center <strong>for</strong> Watershed Protection and Maryland Department of the Environment. 2000 Maryland Stormwater Design<br />

<strong>Manual</strong>. Baltimore, MD, 2000.<br />

City of Portland Environmental Services. City of Portland Stormwater Management <strong>Manual</strong>: Revision #2, 2002.<br />

Claytor, R.A. and T.R. Schuler. Design of Stormwater Filtering Systems. Center <strong>for</strong> Watershed Protection. Silver<br />

Spring, MD, 1996.<br />

Colwell, S. R. et al. Characterization of Per<strong>for</strong>mance Predictors and Evaluation of Mowing Practices in Biofiltration<br />

Swales. 2000.<br />

Fletcher, T., Wong, T., and Breen, P. “Chapter 8 – Buffer Strips, Vegetated Swales and Bioretention Systems,”<br />

Australian Runoff Quality (Draft). <strong>University</strong> of New Castle Australia.<br />

LID <strong>Manual</strong> <strong>for</strong> <strong>Michigan</strong> – Chapter 7 Page 326

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