Central Coast Joint Effort for LID and Hydromodification Control

The Joint Effort is a collaborative, region-wide approach municipalities are using to implement Low Impact Development and Hydromodification Control. The Storm Water Management Programs (SWMPs) for each municipality participating in the Joint Effort contain specific Best Management Practices (BMPs) pertaining to the Joint Effort. These BMPs fall into two categories: development of hydromodification control criteria, and implementation of hydromodification controls and LID. Below are links to information on these two categories as well as additional information about the Joint Effort.

Joint Effort Workshop #1, February 15 & 16, 2012
Joint Effort Status Report - October 31, 2011
Questions and Answers on the Joint Effort
November 2009 PowerPoint on Joint Effort
September 28, 2010 Letter Commencing Joint Effort
October 20, 2009 Letter Soliciting Participation in Joint Effort
August 4, 2009 Letter - Joint Effort for Hydromodification Development

Draft Post-Construction Requirements Available for Public Comment

Public Notice
Draft Resolution No. R3-2012-0025
Draft Post-Construction Stormwater Management Requirements for Development Projects in the Central Coast Region
Draft Technical Support Document
Technical Support Document, Attachment A: Watershed Management Zone Maps (8.6MB)

Spatial Data Coverages

Shapefile Descriptions

The following spatial data coverages are available, grouped by County:
Watershed Management Zones
Physical Landscape Zones
Receiving Water Type
Groundwater Basins
Geology
Urban Nodes
Hydrologic Soil Groups

Download these coverages by clicking on the County name below. 
NOTE: Download times may be lengthy, depending on connection speeds; GIS Software is required to open files once downloaded to your computer system.

Santa Cruz County (13 MB)
Santa Clara County (6.8 MB)
San Benito County (15.7 MB)
Monterey County (36 MB)
San Luis Obispo County (57.9 MB)
Santa Barbara County (32.8 MB)

Development of Hydromodification Control Criteria: Phase 1

Project Background

Fact Sheet: Why Control Hydromodification?

Scope of Work for Methodology Project

Fact Sheet: Summary Scope of Work for Joint Effort
Scope of Work to Develop Hydromodification Control Criteria Methodology

Methodology Project Deliverables

Review of Existing Data
Literature Review
Watershed Characterization Part 1: Precipitation and Landscape
Watershed Characterization Part 2: Watershed Management Zones and Receiving Water Conditions
Linkage Analysis: Landscape Characterization, Receiving Water Conditions, Watershed Processes, and Human Disturbance

The Joint Effort Review Team (JERT)

Joint Effort Review Team Member Bios

Implementation of Hydromodification Controls and LID

To Support Integration of LID as Part of New and Redevelopment Projects:

LID Design (slideshow)
Steps for Successful LID Design
LID Frequently Asked Questions (FAQ)

To Support Local Regulatory Updates for Hydromodification in New and Redevelopment:

Municipal Regulatory Update Training: AHBL Leads LID Webinar for Municipal Regulatory Update Assistance Program (MRUAP) for California's Central Coast Jurisdictions AHBL's Wayne Carlson, AICP worked with Darla Inglis, Ph.D. of the UC Davis Low Impact Development Initiative to host a webinar training series for the MRUAP. The purpose of the training was to aid local governments with the review, revision, and presentation of new and amended regulatory language for hydromodification control and LID to elected officials for adoption as required by the Phase II NPDES Permit. To view the PowerPoint presentations used in the on-line MRUAP training, please click the links below:

MRUAP Session One
MRUAP Session Two

To download the PowerPoint and webinar video files, please visit AHBL's FTP site. To login using the following account (note, both the Username and Password are case sensitive).

Username: MRUAP
Password: MRUAP!

Hydromodification Control and LID Gap Analysis Template - Tacoma
Hydromodification Control and LID Gap Analysis Template - Tacoma Excel Table
Hydromodification Control and LID Gap Analysis Template - Generic
LID Site Analysis Requirements – sample language
LID Maintenance Agreements – sample language
City Council Support Documents

To Provide Technical Support for LID Implementation:
LID Parking Lot Technical Assistance Memorandum (TAM)
LID Bioretention Vegetation Guidance TAM

Additional Internet Resources:

CASQA’s Low Impact Development Portal
Volume-Based Hydrology – Examining the shift in focus from peak flows and pollution treatment to mimicking predevelopment volumes (Stormwater magazine)
Achieving Sustainable Site Design through LID Practices, by Anne Guilette

Regional Project Examples:

City of Paso Robles 21st Green Street
City of Atascadero Zoo Green Parking Lot