Cedar Ridge Subdivision — Phase 2 · Austin, TX
Disturbed
12.4 ac
CGP no.
TXR150000
Score
92
§4 — Erosion & sediment controls
below what an environmental consultant charges for the same plan.
to generate a complete first draft once the questionnaire is done.
covered, each keyed to its own construction stormwater permit.
// Why Siltworks
The binder’s ready before the inspector asks.
Most of a SWPPP is templated or derivable from free government data. Siltworks does the deriving — and leaves every field in your hands.
Minutes, not weeks
Enter your site, and the data fills itself in — soils, slope, rainfall erosivity, receiving waters. A complete draft is ready while a consultant is still returning your call.
Inspection-ready output
Numbered sections 1–8, the right BMPs for your soils and slope, certification block intact. It reads as engineering paperwork that holds up on site — not marketing.
Site data, fetched
NRCS soils, EPA receiving waters, R-factor — pulled for your coordinates.
State-specific rules
Knows where California needs a QSD and Kansas a PE. Your state’s permit, not a template.
From $199
A flat price by acreage. No subscription. Your first draft is free.
// How it works
Four steps to a signed plan.
Answer the questionnaire
Project, location, acreage, start date. A few minutes of plain questions.
Site data fills itself in
Soils, R-factor and receiving waters pulled automatically for your coordinates.
Review BMPs & score
See recommended controls, the rationale, and a compliance score. Edit anything.
Download your SWPPP
Formatted PDF + DOCX with a certification block, ready for the operator to sign.
// Pricing
One flat price, by acreage.
No subscription. Your first draft is free.
Basic
Up to 5 acres
Standard
Over 5 to 10 acres
Professional
Over 10 to 20 acres
XL
Over 20 to 50 acres
Every plan includes
- Complete SWPPP, PDF and DOCX
- Site data filled in automatically
- RUSLE erosion calculation
- Annotated site map
- BMP sizing calculations
- Unlimited edits and re-exports
- Downloads for your whole team
NOI form for District of Columbia, Massachusetts, New Hampshire, New Mexico and Texas: +$149 with any plan.Over 50 acres or a portfolio of sites? Talk to us about Enterprise →
What is a SWPPP, and do I need one?
A Stormwater Pollution Prevention Plan. Any construction project disturbing one or more acres is federally required to have one under the EPA Construction General Permit.
Is this a certified, stamped plan?
Siltworks prepares a complete draft for the operator to review and certify. Where your state requires a QSD or PE, the document is structured for their sign-off.
How fast is it, really?
Most plans generate in a few minutes once the questionnaire is done. The site data fills itself in.
Can I edit what’s generated?
Yes — every field. BMPs, acreage, control measures. The operator stays in control of the final plan.
What does it cost?
A flat price by disturbed acreage, from $199, with no subscription.
See what you’ll get before you sign up.
Open a real generated SWPPP for a Texas subdivision — and judge the output for yourself.