Bioretention_Specs.pdf
PDF 50 KB Posted
- Attached to
- Route 238 Landscape Maintenance
- Solicitation number
- 26-005
- Issued by
- Alameda County, Hayward City, California
About this file
This document outlines a comprehensive maintenance plan for bioretention areas, specifically for the City of Hayward, focusing on routine maintenance activities designed to prevent sediment buildup and clogging in these environmental infrastructure zones. The maintenance plan provides a detailed eight-step routine maintenance schedule with specific frequencies for each task, ranging from twice-weekly to annual activities.
The maintenance tasks include keeping curb cuts and cobbles clear of weeds and debris, removing obstructions and trash, inspecting drainage and erosion conditions, managing vegetation health, maintaining irrigation systems, checking mulch depth, and conducting an annual cleaning in preparation for the city's November inspection. Each maintenance activity is strategically timed to ensure the bioretention areas remain functional, with most tasks occurring monthly or as needed after storm events, emphasizing proactive environmental management and storm water infrastructure preservation.
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Text version
BIORETENTION AREAS
The principal maintenance objective for the maintenance of the bio-retention areas is to prevent sediment buildup and clogging, which reduces pollutant removal efficiency and may lead to bioretention area failure. Routine maintenance activities, and the frequency at which they will be conducted are shown in the table below:
Routine Maintenance Activities for Bio-Retention Areas
No. Maintenance Task Frequency of Task
1 Keep curb cuts, covered curb cuts and cobbles clear of weeds, trash and debris.
Twice a week
2 Remove obstructions, debris and trash from bioretention area and dispose of properly.
Monthly, or as needed after storm events.
3 Inspect bioretention area to ensure that it drains between storms and within five days after rainfall.
Monthly, or as needed after storm events.
4 Inspect inlet for channels, soil exposure or other evidence of erosion. Clear obstructions and remove sediment. Replace any erosion with C-10 soil mix.
Monthly, or as needed after storm events.
5 Remove and replace all diseased and dead vegetation.
Twice a year.
6 Maintain vegetation and check the irrigation system. Prune and weed to keep bioretention area neat and orderly in appearance.
Before wet season begins, or as needed.
7 Check that mulch is at appropriate depth (3 inches per soil specifications) and replenish as necessary before wet season begins.
Monthly
8 Annual cleaning every October to prepare for annual inspection from City of Hayward in November.
Annually
File details come from the government source that posted it. Updated .