QNL Engineering

Civil engineer · tool builder

Quinn N. Liebbe

Portrait of Quinn N. Liebbe in a field with a vintage truck and mountain backdrop

Disclaimer

This website is a personal project and is not affiliated with, endorsed by, or sponsored by any third-party tools, organizations, or websites referenced herein.

The content on this site is provided for informational purposes only. While reasonable effort is made to ensure accuracy, no guarantees are made regarding completeness, reliability, or timeliness, and the site owner assumes no liability for errors or omissions.

This website is not affiliated with or endorsed by my employer, JR Engineering. All views, opinions, and tools presented are my own and do not reflect the official policies or positions of my employer or its affiliates.

About me

Who I am

I'm a civil engineer based in Colorado, focused on single family, multifamily, and commercial land development.

Repetitive drafting teaches you quickly that better tooling isn't optional. It's the difference between efficient, accurate work and wasted time.

This site is a collection of tools I've built in my off-hours, some of the civil projects I have worked on, and connections I have made along the way.

The toolkit

What I'm building

A growing set of tools and learning resources for civil engineers, grouped by the platform they live in.

AI

1 live

Plan-set review and proposal drafting, built around the work you already do.

Try Plan Review

Upload a civil plan sheet PDF and get a list of common drafting issues, flagged with location.

  • Draft civil engineering proposals from a project brief: scope, fees, and assumptions, in your firm's voice.

More tools coming soon

Coming soon

Dynamo scripts, AutoLISP routines, and civil engineering diagrams and learning resources.

My projects

Projects I've worked on

Civil engineering projects from my day-to-day work, plus the side projects in between.

Cloverleaf

Monument, CO

141 single family lot development

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Cloverleaf preliminary plan
Preliminary plan
Cloverleaf aerial view
As built · aerial

East Main

Parker, CO

Commercial and multifamily building

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East Main preliminary plan
Preliminary plan
East Main aerial view
As built · aerial

PACE Center Garage

Parker, CO

296-space parking garage serving the PACE Center

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PACE Center Garage plan
Site plan
PACE Center Garage aerial view
As built · aerial

Pine Curve

Parker, CO

Multifamily and commercial development

View plan Hide image
Pine Curve preliminary plan
Preliminary plan

The Rossonian Hotel

Five Points, Denver, CO

Renovation of the historic Rossonian Hotel

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Street view of the historic Rossonian Hotel in Five Points, Denver
Street view

Sterling Ranch Filing No. 2

Colorado Springs, CO

49 single family lots

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Sterling Ranch Filing No. 2 preliminary plan — 49 single family lots
Preliminary plan
Sterling Ranch Filing No. 2 aerial view
As built · aerial

Tamlin Road RV Storage

El Paso County, CO

RV storage facility

View plan Hide image
Tamlin Road RV Storage site plan
Site plan

The Vixen

Denver, CO

Construction support for a 344-unit apartment building

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Street view of The Vixen apartment building in Denver
Street view

Westridge

Highlands Ranch, CO

48 single family lots on 10.84 acres

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Westridge preliminary plan — 48 residential lots and 1 tract on 10.84 acres
Preliminary plan
Aerial view of Westridge — single family homes along curved streets in Highlands Ranch
As built · aerial

My connections

Engineers and others I've worked with

Coworkers, mentors, and connections from across engineering, architecture, and construction who've shaped how I think about this work.

Portrait of Taylor Van Gordon, PE

Taylor Van Gordon, PE

Civil Engineer

Stay in the loop

I'll send a note when something new is ready

No spam. No newsletter. Just the occasional “this is ready to try.”