Civil engineering for the places worth protecting.
We design land developments, water systems, and outdoor recreation infrastructure across the Rocky Mountains — pairing sound engineering with a deep respect for the landscape.
Everything moving here is a preview — step into the Fish TankThree practice areas, one Colorado firm.
Land development & site design
Grading, drainage, utilities, and site layout tuned for mountain terrain and Colorado codes.
Water resources & stormwater
Hydrology, stormwater management, floodplain analysis, and stream restoration that reads the watershed first.
Outdoor recreation & trails
Trail alignments, trailheads, campgrounds, and outdoor amenity design built to last on public and private land.
Four steps from first call to stamped plans.
No account managers, no handoffs. The same engineer walks your site, runs the numbers, and signs the drawings — with a fixed, all-in fee agreed before design starts.
- 01
Site read
Slope, soils, groundwater, access, and the county rules that actually govern the parcel.
- 02
Concept & fee
Options with real trade-offs, plus a fixed all-in fee and schedule before any drafting.
- 03
Design & permit
PE-stamped drawings, calculations, and the submittal package your reviewer expects.
- 04
Build support
Field answers, revisions, and as-builts through construction and closeout.
Septic & OWTS design
Single-family systems for the Idaho Springs corridor and mountain counties, sized to Reg. 43 and local health-department standards. Build your estimate on the septic page.
Get a septic estimate →Off-grid infrastructure
Solar, water storage, reclamation, aquaponics, and backup power — designed to be discrete, permittable, and genuinely maintainable at altitude.
Explore off-grid →Bids & procurement
We respond to public and private solicitations across Colorado. See the portals we watch and how our submittals come together — then invite us to bid.
See bid reference →Read the land. Draw the line. Build it right.
Every project starts with the site. Slope, soils, drainage, wildlife corridors, viewsheds, and the way a community uses the ground — those constraints become the design language for what gets built.
We keep teams small and senior. That means the engineer you meet at the kickoff is the same one walking the site, stamping the plans, and picking up the phone at construction.
Have a site, a permit hurdle, or a wild idea?
Tell us about the project. We'll respond within one business day with honest feedback on scope, feasibility, and next steps.
Start the conversation →