City and County of Honolulu

Rules Relating to Storm Drainage Standards

CityHawaiihighNo

Fields not found in document: design_criteria.water_quality_volume_method, design_criteria.required_hydrologic_hydraulic_software

Other manuals in Hawaii: State of Hawaii Department of Transportation, Highways Division

Document Metadata

Jurisdiction level

municipality

“design of storm drainage facilities in the City and County of Honolulu”
Introduction

State

Hawaii

“Honolulu, Hawaii”
Title Page

Version / edition

August 2017

“AUGUST 2017”
Title Page

Adoption / effective date

2017-08

“This edition supersedes the Rules Relating to Storm Drainage Standards, January 2000 (Repealed August 16, 2017).”
Introduction

Last revised date

2017-08

“AUGUST 2017”
Title Page

Relationship to state manual

independent

“These standards have been prepared pursuant to Article 12, Chapter 14, Revised Ordinances of Honolulu, 1990 as amended”
Introduction

Design Criteria

Design storm return periods (years)

10-year, 50-year, 100-year

“For drainage areas of 100 acres or less, Tm (recurrence interval) = 10 years, unless otherwise specified.”
Part I.A.1, Page 1

Water quality volume method

Not found in document

No evidence cited

Peak flow calculation method(s)

Rational Method (Q = CIA) for drainage areas of 100 acres or less, Plate 6 Design Curves for Peak Discharge vs. Drainage Area (USGS flood-frequency / 100-year) for drainage areas greater than 100 acres

“For drainage areas of 100 acres or less, the rational method shall be used.”
Part I.B.1, Page 1

Required hydrologic/hydraulic software

Not found in document

No evidence cited

Approved BMP categories

Closed conduits (storm drains), Open channels, Roadway culverts and bridges, Low impact development best management practices (per separate Rules Relating to Water Quality)

“C. CLOSED CONDUITS... D. OPEN CHANNELS”
Table of Contents / Part II