County of Yolo 2008 Standard Specifications and Details

Click here to download the entire Improvement Standard Document

Due to the size of the document, we have broken down the standards by section.  Please feel free to download and save as needed.  All files are in PDF format

**If you choose to download information from our website, please note it is your responsibility to check for any amendments to the Specifications and Details.**

The County of Yolo Standard Specifications and Details are subject to change due to State and Federal requirements, so please check this site periodically for updates and or call the Public Works Division at (530) 666-8775 for more information regarding updates.

Yolo County City/County Drainage Manual (Approved February 23, 2010)

The Drainage Manual specifies updated engineering criteria and methodology for drainage design for developments and public facilities in the unincorporated areas of Yolo County, and provides guidelines for stormwater quality treatment to supplement the Yolo County Improvement Standards. 


Drainage Manual Complete (PDF)
Precipitation Manual - GIS (ZIP)*

* Please read the "Read Me First" file contained in the ZIP file for information on how to view the GIS files.

Drainage Study Report Guidelines

Drainage Study Report Guidelines - This is a design aid, intended to help consultants and engineers demonstrate compliance with County standards.

Transportation Impact Study Guidelines (Approved February 23, 2010)

Transportation Impact Study Guidelines  

Free viewers are required for some of the attached documents.
They can be downloaded by clicking on the icons below.

Acrobat Reader Windows Media Player Word Viewer Excel Viewer PowerPoint Viewer