The Engineering Division is responsible for the management of construction contracts and activities; management of contractual engineering services; development of Standard Designs of Common Engineering Structures; engineering and technical assistance to other departments; infrastructure grant procurement, monitoring, and reporting; maintenance of GIS data and different mapping and record systems; compliance with local, regional, state, and federal laws; development of staff in technical, organizational, and supervisory skills; chair and staff support to the Traffic Committee; and management of right-of-way activities.

Staff engineers review development plans for residential and commercial projects within the city to assure they meet State Standards and issue encroachment permits for those projects. The Engineering Division is committed to responding to the changing needs of our community and to ensuring San Dimas remains a distinctive place in which to live and work.

The Engineering Division is responsible for handling all issues related to traffic in the City of San Dimas. Traffic improvements originate from many different sources including City projects, developer projects, and citizen requests. Engineering staff researches and responds to all citizen complaints and requests, which often include inquiries for stop signs, traffic signs, parking restrictions, and crosswalk additions and removals.

The Engineering Division reviews and inspects development proposals and compliance with city policies, procedures, codes, standards, and other governmental requirements relating to land subdivisions, grading, drainage, public improvement within the city right-of-way, and transportation matters. The Department is also responsible for the management, rehabilitation, and replacement of public improvements, such as water mains, sewer mains, storm drains, streets, traffic signals, etc. to provide continued reliable service to the community. Also, the Division is responsible for receiving bids and proposals for the development and construction of new public roadways, sidewalks, and overseeing projects that affect public property to protect and enhance the community’s quality of life.

Traffic Counts and Speed Survey
Traffic Counts-The Engineering Division is responsible for maintaining current traffic counts on arterial and collector streets. Traffic counts are generally updated every two years.

Speed Survey-Speed limits on City streets are updated approximately every five years.  The Engineering Division works closely with the Police Department to perform an engineering and traffic survey and update speed limits based on the results.

Click here for a copy of the most recent data: 24 Hour Count

Sewer Information
The City’s sewers are maintained by Los Angeles County Consolidated Sewer Maintenance District.  The County’s Annual Report provides information on how to avoid an expensive drain back up, as well as contact information and background on the division. Here are some helpful resources from the Los Angeles County Department of Public Works.

FAQ Sewer Maintenance
FAQ Sewer Maintenance-Spanish
Sewer Maintenance District Brochure
Sewer Maintenance District Brochure- Spanish

To provide a consistent, statewide regulatory approach to address the issue of sanitary sewer overflow (SSO), the State Water Resources Control Board (State Water Board) adopted Statewide General Waste Discharge Requirements (WDRs) for Sanitary Sewer Systems, Water Quality Order No. 2006-0003 (Sanitary Sewer Systems WDR) on May 2, 2006. The Sanitary Sewer Systems WDR requires public agencies that own or operate sanitary sewer systems to develop and implement sewer system management plans and report all SSOs to the State Water Board’s online SSO database.

The State Water Resources Control Board requires all agencies that own or operate a wastewater collection system, to develop and implement a Sewer System Management Plan (SSMP) that documents how the City manages its wastewater collection system. On December 6, 2022, the State Water Resources Control Board adopted the reissued Statewide General Waste Discharge Requirements and the Monitoring and Reporting Program (WDR) by issuing Order No. 2022-0103-DWQ.

This WDR requires owners and operators of publicly owned collection sewer systems to develop and present a Sanitary Sewer Management Plan (SSMP) to their governing body for approval. The WDR requires that the SSMP be updated every five years and must include any significant program changes. The City of San Dimas is required to comply with this order as it owns approximately 103 miles of sewer that are primarily maintained by the Los Angeles County Sewer Maintenance District.

The City’s Sewer System Management Plan (SSMP) can be viewed through the link below.  Hard copies and copies of the attachments may be considered upon request at City Hall.

If you have any questions or concerns regarding the sewer, please contact the City of San Dimas Public Works Department at 909.394.6240.  For emergencies, contact the Los Angeles County Consolidated Sewer Maintenance District directly at 1.800.675-HELP(4357).

Bids & Proposals
The Public Works Department advertises capital improvement projects for open bids.  Projects are announced in the local Inland Valley Daily Bulletin (newspaper and online) and four plan rooms (listed below):

Reed Construction Data
Document Processing Center
30 Technology Parkway South, Suite 500
Norcross, GA 30092-2912

F. W. Dodge (McGraw-Hill or The Green Sheet)
1333 S. Mayflower Avenue, Suite 300
Monrovia, CA 91016-4066

Construction Bidboard
4420 Hotel Circle Ct., Suite 21
San Diego, CA 92108

Plan Room
41085 Elm Street
Murrieta, CA 92562

Encroachment Permit
A Public Works Encroachment Permit is required before any construction or activity that involves City Right-of-Way, including renting a dumpster.   All inquiries may be directed to Public Works Engineering at 909. 394.6240 or via email .

Click here for the Engineering Fee Schedule.

The City of San Dimas Public Works Engineering Division follows the 2009 Edition of the “Greenbook” Standard Specifications for Public Works Construction and Standard Plans for Public Works Construction and Specifications.

The “Greenbook” is available for viewing only.  For copies, contact BNI Building News at 760. 734.1113.