Local bid reference

Snohomish, WA: Which parts of the Snohomish drainage requirements belong in the bid?

The county describes its drainage requirements as a combination of the Drainage Manual, drainage and land-disturbance code chapters, and Engineering Design and Development Standards. The manual alone is not the complete reference.

Remote plan-based takeoff support; no local office, completed local project or site investigation is represented by this page. Cost, delivery schedule and deliverables depend on the agreed project scope.

What this changes in the bid review

Estimating interpretation: A basin shown on the drainage plan can still require access, outlet protection and road-interface details found elsewhere in the approved package. Build a cross-reference for those items before issuing the takeoff.

Check the project documents

Mark each item after reviewing its supporting document.Record the applicable manual edition and the project approval date.Match drainage details against the applicable EDDS drawings, rather than taking pipe quantities from narrative guidance.Carry construction BMPs, permanent controls and maintenance access in separate quantity groups.

Clarification to request: Which approved documents resolve any difference between the drainage manual, EDDS and project details?

Project document references or unresolved items

0 of 3 checks reviewed. Notes stay in this tab; download to keep a copy.

Official context

Snohomish County Drainage Manual

Source checked 2026-10-16. Confirm the current incorporated edition and project approval with the named authority. The checks above are our estimating interpretation; the linked agency supplies the source context.

Related state and measurement references

Open the Washington document reference for state-level resources. For measurement methods, use the utility trench guide or civil-plan reading guide.