This two-year research study, funded by the Iowa Department of Transportation, evaluated the performance of temporary erosion and sediment control practices, predominantly ditch check practices, on the Highway U.S. 30 Expansion project in Tama County, Iowa. Field evaluations were conducted for both current Iowa DOT approved ditch check practices and trial modifications of improved practices. Ditch check practices were evaluated over four months and included: 1) standard and modified wattle ditch protection installation with varying fill medias 2) standard and three (3) modified silt fence ditch check installations, and 3) standard rock check dam. Modifications to silt fence ditch check installations included wire reinforcement, dewatering weir, and angle of installation. Wattle ditch protection modifications implemented non-destructive teepee staking, special ditch protection underlay, and pins to enhance ground contact between the wattle and channel. Proposed rock check dam modifications planned to implement a geotextile underlay and overlay. This poster will present the research findings and analysis on the performance of common ditch check practices used on DOT construction sites.
Identify varying ditch check practices used in highway construction.
Understand common failure modes of ditch check practices.
Implement enhanced installation techniques and optimize performance of several ditch check practices.