Service 01SWMP & SWPPP Development
Every construction project disturbing one acre or more in Colorado needs a Stormwater Management Plan (SWMP) under the CDPS general permit (COR400000). Many local MS4 jurisdictions also require a SWPPP under their own ordinances. Either way, the plan needs to be site-specific, current, and defensible.
We prepare stormwater management plans that reflect your actual site conditions, your actual construction sequence, and the specific requirements of your local jurisdiction. We've worked across the Front Range and understand the differences between what various municipalities and counties require during plan review.
- Site assessment and existing conditions analysis
- Drainage area delineation and runoff calculations
- Control measure selection and design specific to your site
- Phasing plans that evolve with your construction schedule
- CEOS permit application support
- Plan updates and revisions as site conditions change
Service 02Construction Stormwater Inspections
Colorado's CDPS permit requires inspections every 14 days and within 24 hours of a qualifying rain event. Your local MS4 authority may require more. Either way, the inspections need to be thorough, well-documented, and performed by someone who knows what to look for.
We provide third-party inspection services that give you an experienced set of eyes on your site. We evaluate every control measure, document conditions with photos and detailed reports, identify deficiencies before they become violations, and give your team practical guidance on corrective actions.
Inspection costs depend on site size, number of control measures, and travel distance. Contact us for a site-specific quote.
Service 03MS4 Compliance Support
Small and mid-sized municipalities along the Front Range face the same MS4 permit requirements as larger cities, but with a fraction of the staff and budget. We help bridge that gap.
- Gap analysis of your current compliance program
- SWMP document development and updates
- Construction site plan review and inspection
- Illicit discharge program support
- Storm sewer mapping and outfall screening
- Annual report preparation and submittal
- Ordinance development and technical standards support
We tailor the scope to your municipality's needs and budget. Some communities need full program management. Others just need help with construction inspections and annual reporting. We'll work with you to figure out what makes sense.
Service 04Post-Construction Stormwater Design
New development and redevelopment projects along the Front Range require permanent water quality and detention facilities that meet MHFD criteria and local jurisdiction standards. We design these facilities and support developers through the review and approval process.
- Extended Detention Basins (EDBs) for water quality and flood control
- Bioretention and rain garden design
- Underground detention systems
- Sand filter design
- WQCV and EURV calculations per MHFD criteria
- Drainage reports and facility sizing
- Design review and second opinions on existing plans
We also help developers think about stormwater facilities as site amenities rather than regulatory burdens. A well-designed EDB with trails, native landscaping, and gentle grading can be one of the most valuable features on a property.
Service 05Compliance Response Support
If you've received a noncompliance notification, violation, or illicit discharge notice from CDPHE or your local MS4 authority, we can help you respond effectively. We assess the current site conditions, prepare or revise your stormwater management plan, implement corrective actions, and draft your formal response.
Time matters with enforcement actions. If you're holding a compliance notice right now, call us.