Sizing a Culvert for a Dirt Road Crossing a Seasonal Stream: Peak Flow, Pipe Capacity and the Price of Closure Days

Rational-method peak flows for a 0.85 km2 catchment (10-year 6.93 m3/s, 50-year 9.26 m3/s) compared with Manning pipe capacities. A single 900 mm pipe (2.56 m3/s) closes about 1.86 days per year in a stated event model; twin 1200 mm pipes (11.03 m3/s) close about 0.08 days per year and cost 7,700 dollars more in stated materials and labour. SIMULATED, NOT MEASURED.

Authors

Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2026-11-10
DOI
https://doi.org/10.5281/zenodo.24113675
Primary Topic
Hydraulic flow and structures
Type
preprint
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preprint

Sizing a Culvert for a Dirt Road Crossing a Seasonal Stream: Peak Flow, Pipe Capacity and the Price of Closure Days

William Alexander Aldred
Zenodo (CERN European Organization for Nuclear Research)
Hydraulic flow and structures
preprint

Sizing a Culvert for a Dirt Road Crossing a Seasonal Stream: Peak Flow, Pipe Capacity and the Price of Closure Days

William Alexander Aldred
preprint en

Abstract

Rational-method peak flows for a 0.85 km2 catchment (10-year 6.93 m3/s, 50-year 9.26 m3/s) compared with Manning pipe capacities. A single 900 mm pipe (2.56 m3/s) closes about 1.86 days per year in a stated event model; twin 1200 mm pipes (11.03 m3/s) close about 0.08 days per year and cost 7,700 dollars more in stated materials and labour. SIMULATED, NOT MEASURED.

Zenodo (CERN European Organization for Nuclear Research)
Hydraulic flow and structures
DOIOpen Access PDFOpenAlex
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Sizing a Culvert for a Dirt Road Crossing a Seasonal Stream: Peak Flow, Pipe Capacity and the Price of Closure Days — William Alexander Aldred · Zenodo (CERN European Organization for Nuclear Research) (2026) | TGRS Research Map | TGRS