Evaluation of NDOT’s Construction Stormwater Detention Measures Using Full-Scale Testing Techniques

Williams, Lillian K.; Perez, Michael A.; Donald, Wesley N.

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Evaluation of NDOT’s Construction Stormwater Detention Measures Using Full-Scale Testing Techniques

2026-04-01
By Williams, Lillian K. ; Perez, Michael A. ; Donald, Wesley N.

File Language:

English

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Creators:

Williams, Lillian K. ; Perez, Michael A. ; Donald, Wesley N.
Corporate Creators:

Auburn University. Department of Civil Engineering
Corporate Contributors:

Nebraska. Department of Transportation ; United States. Department of Transportation. Federal Highway Administration
Subject/TRT Terms:

Compliance Construction Management Construction Stormwater Detention Detention Practice Pollutants Runoff Sediment Control Sediment Discharge Sediments Sediment Trap Silts Silt Trap
Publication/ Report Number:

SPR-FY25(043)
Resource Type:

Tech Report
Geographical Coverage:

United States ; Nebraska
Edition:

Final Report: July 2024 – May 2026
Corporate Publisher:

Nebraska. Department of Transportation
Abstract:

Sediment is a leading pollutant in waterbodies, contributing to turbidity, pollutant transport, ecological degradation, and reduced flow capacity. Construction activities are major sources of sediment-laden runoff, necessitating regulatory compliance through Stormwater Pollution Prevention Plans. This study developed a full-scale testing methodology simulating Nebraska hydrologic conditions to evaluate the performance of Nebraska Department of Transportation silt traps and sediment traps at the Auburn University Stormwater Research Facility. Results showed that standard installations can be significantly improved through design modifications. For silt traps, pairing with a modified V-shaped, wire-backed silt fence with a central weir achieved the highest sediment retention (95.9%), substantial total suspended solids (TSS)reduction (89.1%), and turbidity reduction (67.7%). A slash mulch berm also performed well but may be limited by material availability. Structural testing of the low porosity silt fence indicated that reduced post spacing and fence height improved durability. For sediment traps, the use of coir baffles and a surface skimmer enhanced flow control, reduced turbulence, lowered downstream TSS and turbidity, and retained sediment (91.1%). Overall, optimized configurations significantly improved sediment capture and downstream water quality, supporting refined design recommendations for effective sediment control practices.
Format:

PDF
Funding:

01071F SPR-FY25(043)
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:a98c736a85bc91ef997fb25662e430b8bac31e452a2aecae32e88bc8b36316c48a19f0e1c731e15c743d19d06192e1f94c48d6fd51bae0b698da281230398300
Download URL:

https://rosap.ntl.bts.gov/view/dot/92073/dot_92073_DS1.pdf
File Type:

[PDF - 102.73 MB ]

File Language:

English

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