Hand holding pen to draw plans

​​Engineering Services

Through its Engineering Services Division, Thornton oversees capital improvements, surveying, and maintaining the City's National Pollutant Discharge Elimination System (NPDES).


Please consider reaching out to us via email or our MyThornton app. Visit the Contact City of Thornton featured link for more information.

Capital Improvement Project (CIP) Engineering

Manages the design and construction of Capital Improvement Projects (CIP) such as streets, bridges, drainage, water, sewer, trails, and streetscaping.

View the current capital improvement project map.

Right-of-Way Permits

Visit the Permit Information Page for more information.

Utility Locates

All residents, professional excavators, or anyone planning to dig must "Call Before you Dig,"; it's the law. 

Thornton staff will respond to water, sanitary sewer, and storm line locate requests for lines in the right-of-way made through Colorado 811. City staff does not do locates on private property.

Contact Colorado 811 to schedule a utility locate: Dial 811 or 1-800-922-1987

​Survey Section  

The Survey Section provides surveying services and technical information to the CIP (Capital Improvement Program) Section, other Thornton departments, citizens, and consultants. Those services include computer drafting, topographic surveys, legal descriptions, and plat reviews.

Survey Control for City of Thornton Projects
Horizontal Control

​Thornton does not maintain a survey network. When working on Thornton projects, please use NGS monuments and/or the Adams County Network for your control points.

Vertical Control

The vertical datum must be based on the North American Vertical Datum 1988 (NAVD 88). You may use the Thornton Benchmarks, which are downloadable below, Benchmarks from NGS, and the Adams County Control points.

Benchmark descriptions are now available in a downloadable pdf format which requires Adobe Reader

Thornton Benchmarks