Texas Contributing Zone Plan (CZP) Stamp

We are seeking a Texas-licensed Professional Engineer (PE) to review and stamp a Contributing Zone Plan (CZP) application package for a small residential construction project located in Travis County, Texas (Edwards Aquifer Contributing Zone).

Project: Construction of a ~900 sq ft accessory dwelling unit (ADU) with driveway tie-in
Site: 1.962 acres, flat backyard, Lot 112 Saddletree Ranch Sec. 3, 401 Winchester Dr, Dripping Springs, TX
Disturbed area: ~0.25 acres
Impervious cover: ~1,300 sq ft (≈2% of lot)
Wastewater: Tie-in to existing septic (OSSF)
Watershed: Barton Springs / Edwards Aquifer Contributing Zone

What we need from you:
Review our pre-completed CZP packet (all TCEQ forms filled).
Provide/prepare a sealed site plan showing:
ADU footprint & driveway extension
Drainage flow arrows
Erosion & sediment controls (silt fence, stabilized entrance, etc.)
Certify impervious cover calculations.
Provide any required brief narrative sections to satisfy Attachments D/E/J/K (Factors Affecting Water Quality, Stormwater Volume, BMPs).
Sign and seal the Contributing Zone Plan for submittal to TCEQ


What we already have (ready for you):
TCEQ Cover Page, CZP Application, Core Data Form, Agent Authorization, Fee Form
Temporary Stormwater Section (SWP3 equivalent) drafted
Maps (Google vicinity, USGS topo, plat/survey)
Narrative and construction sequence
Checklist completed

Deliverable:
A sealed CZP packet acceptable to TCEQ (electronic copy with PE seal/signature).
Qualifications:
Must be a Texas-licensed PE (civil/environmental).
Experience with Edwards Aquifer applications a plus, but not required — residential CZPs are straightforward.

Timeline:
Looking for fast turnaround (1–2 weeks max).

Budget:
Open to fixed-price bids.
Small scope, straightforward residential project.

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