As‐built certification, prepared by a Professional Engineer, is required within 10 days following installation of all stormwater management practices to ensure that the site was built in accordance with the approved plan.

Certification must include the following:

• As-built certification form
• Stamped record drawings
• Relevant checklists
• Construction photos
• Additional information as requested

If the site was constructed differently than the approved plan, additional documentation must be provided showing that the site is still meeting all ordinance requirements and relevant standards.

A record drawing is the final compiled drawing prepared by an engineer after completing a project. This drawing shows the final as-built or as-constructed condition to ensure that the project was built to the submitted and approved plans. The record drawing must include the following:

• Surveyed contours/elevations overlain on approved design. It is helpful to display the design contours in gray and the as-built contours in black or red. For plans with stormwater basins, include a storage summary table (proposed vs. as-built) on plan. Exclude extraneous information and hatching which makes the drawing difficult to read. See examples below.
• Other relevant as-built information necessary to verify stormwater function, such as pipe and structure size/location/material/inverts, emergency overflows, and critical elevations.
• Professional engineer's stamp.

Summary Table Example

Contour Example

Elevation Example

Checklists are intended to provide guidance to the design engineer and assist in expediting the review process. Additional documentation may be warranted depending upon how checklist items are addressed.

• Wet/Dry Basin Checklist
• Bioretention/Infiltration Checklist
• Conveyance Checklist

Photos of all complete practices listed in the maintenance agreement must be included. It's recommended that progress pictures also be provided.

Excavated infiltration basin looking north

Bioretention device looking northwest, prior to restoration

Vegetated infiltration basin looking north

The design engineer will submit the certification package electronically, and it will be reviewed by WRE staff. If additional information is needed, it will be requested by the reviewer. Once approved by the reviewer, a WRE inspector will visit the site to field verify the certification information; if any discrepancies are encountered, the inspector will ask for additional work and/or information. Once approved by the inspector and reviewer, the site will be considered in compliance with its stormwater permit and ongoing maintenance, as outlined in the deed recorded stormwater maintenance agreement, will be required.