Illinois
IDOT Drainage Manual
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Heuristic agency extract from prepared text. IDOT Drainage Manual (July 2011) via PowerDMS Pipeline excerpt repair removed 1 unlocated citation(s).
Fields not found in document: design_criteria.water_quality_volume_method, document_metadata.jurisdiction_name
Document Metadata
Jurisdiction level
State
No evidence cited
State
Illinois
No evidence cited
Version / edition
Not found in document
No evidence cited
Adoption / effective date
Not found in document
No evidence cited
Last revised date
Not found in document
No evidence cited
Relationship to state manual
independent
No evidence cited
Design Criteria
Design storm return periods (years)
5-year, 50-year, 100-year, 500-year
“foot above the applicable base flood or 100-year frequency flood elevation. D. "Office of Water Resources" means the Illinois De”
Water quality volume method
Not found in document
No evidence cited
Peak flow calculation method(s)
NRCS / SCS Curve Number (TR-55), HEC-RAS
“Natural Resource Conservation Service (NRCS), National Highway Institute (NHI) and the Federal Highway Administration (FHWA”
Hydrologic/hydraulic software
HEC-RAS
No evidence cited
Approved BMP categories
Detention Basin
“Detention Basin”