Civil Engineering in Longmont, Colorado.
We work with developers, architects, and landowners on civil engineering for Longmont land development, from Hover Street / SH-119 tech corridor and brewery / light-industrial growth to St. Vrain Creek corridor redevelopment and downtown South Main / Sugar Mill infill.
Licensed Professional Engineer in Colorado. The engineer designing your Longmont project is the same engineer answering your call.
(612) 567-2154 →How stormwater is regulated in Longmont.
Longmont is NOT an MHFD member. The city runs its own criteria, and post-2013 floodplain mapping through the Resilient St. Vrain Project is mid-update.
The city's own manual references MHFD methodology but is administered locally. Design Standards and Construction Specifications layer on top.
St. Vrain Creek channel and floodplain are still being reconstructed in phased reaches. Floodplain maps and channel sections are mid-update, not legacy FEMA panels.
State construction stormwater permit. SWPPP and inspection cadence are standard scope on any one-acre-plus disturbance.
Who reviews a Longmont project.
A typical Longmont land development project moves through city, county, state, federal, and raw-water provider review. We coordinate the full stack.
Plan and engineering review. City-owned utilities: Longmont Power & Communications and Longmont Water. LURA and LDDA coordination on urban-renewal and downtown projects.
County review for unincorporated edges. Most of Longmont sits in Boulder County, with a small east-end sliver in Weld County.
Access and frontage permits on SH-119 (Ken Pratt / Diagonal), SH-66, and US-287.
Raw water and Colorado-Big Thompson coordination for water supply on larger projects.
CDPS-COR400 permit, plus Section 404 review for St. Vrain Creek and Left Hand Creek WOTUS impacts.
What's different about engineering in Longmont.
A few things shape how a project actually moves in Longmont. We design with these baked in from day one.
- •Resilient St. Vrain post-2013 flood reconstruction. St. Vrain Creek floodplain and channel sections through Longmont are still being phased in. Use current maps, not legacy FEMA.
- •City criteria, not MHFD. Drainage reports follow the city's own manual. MHFD methodology is referenced but the local administration matters.
- •Hover Street / SH-119 tech corridor. Seagate, Maxar / DigitalGlobe, and legacy IBM / Amgen / Intrado heritage. Light-industrial and lab work is the corridor's identity.
- •Brewery and craft-industrial cluster. St. Vrain Valley brewing (Left Hand, Oskar Blues in Lyons). Process-water and light-industrial site design recurring.
- •LURA, LDDA, and South Main Station / Sugar Mill. Urban renewal and downtown redevelopment with TIF and design framework apply in the city center.
What we work on in Longmont.
Lab, advanced manufacturing, and flex industrial. CDOT access on SH-119, city drainage, and Boulder County frontage on county roads.
Resilient St. Vrain coordination, floodplain analysis on current channel sections, LURA project area framework.
Historic-character design, LDDA coordination, compact stormwater, and tight-site grading.
Process-water service, light-industrial site design, truck circulation, and tasting-room mixed use.
Common questions about civil engineering in Longmont.
Why don't MHFD criteria apply in Longmont?
Longmont is not an MHFD member jurisdiction. Stormwater is regulated through Longmont's own Storm Drainage Design Criteria Manual and Design Standards and Construction Specifications. The criteria reference MHFD methodology but are administered locally. Drainage reports must match the city's framework, not default MHFD methods.
What is the Resilient St. Vrain Project?
The Resilient St. Vrain Project is the city's ongoing phased reconstruction of the St. Vrain Creek channel and floodplain following the 2013 flood. Floodplain maps and channel sections through Longmont are mid-update, not the legacy FEMA panels. Any site touching the creek corridor or its tributaries needs current floodplain analysis.
Do you work on tech corridor and brewery projects in Longmont?
Yes. The Hover Street / Ken Pratt Boulevard (SH-119) corridor anchors tech and advanced manufacturing (Seagate, Maxar / DigitalGlobe, and historic IBM heritage). The broader St. Vrain Valley brewing cluster (Left Hand, Oskar Blues nearby in Lyons) has driven a wave of light-industrial and brewery / tasting room work. We design for those use types.
Do you handle Longmont Urban Renewal Authority projects?
Yes. The Longmont Urban Renewal Authority covers project areas including Twin Peaks, South Main Station, and the Sugar Factory / Sugar Mill area. Tax-increment financing and design framework apply in those zones. The Longmont Downtown Development Authority (LDDA) covers the downtown core.
Do you coordinate CDOT Region 4 permits for Longmont projects?
Yes. Longmont sits in CDOT Region 4. Access and frontage permits are commonly required on SH-119 (Ken Pratt / Diagonal), SH-66, and US-287. We prepare and submit CDOT applications as part of the civil package.
Working on a Longmont project?
Tell us about the site. You'll get a same-business-day response from Paul, with a real read on the civil scope, Resilient St. Vrain status, and likely permitting timeline.