Constructed Stormwater Wetland¶

Constructed stormwater wetlands are governed by BMP Manual Chapter 10.4 in the live source corpus. This page now stays with the source-backed center of gravity: a large-scale vegetated treatment basin with long residence time, a strong maintenance burden, and GI use only when the actual configuration and site evidence support it.

Structured citation evidence for this page lives in the sibling claim manifest.

Overview¶

In the enrolled source set, a constructed stormwater wetland is a large-scale surface BMP that uses shallow wetland conditions, vegetation, and residence time to provide runoff-quality treatment and storage. It is not a compact site BMP, and it should not be treated as one.

Source Mapping¶

The live citations layer resolves this route directly to the following canonical source bundles.

Route type: canonical
2023 source bundle: Chapter 10.4 (2023_BMP_10_4) - Standard Constructed Wetlands
2026 source bundle: Chapter 10.4 (2026_BMP_10_4) - Standard Constructed Wetlands

Key verified claims already tied to this page manifest: - Constructed stormwater wetlands are source-backed through Chapter 10.4. - Constructed-wetland GI use remains conditional on the real Chapter 12 and Chapter 13 support chain. - Constructed-wetland maintenance stays tied to forebay, vegetation, unwanted growth removal, and outlet performance.

Design Criteria¶

The reconciled design criteria below come from the live crosswalk and page-level claim set, not from the older narrative snapshot.

This route does not have a dedicated parameter table in the crosswalk, so the controlling criteria stay tied to the verified claims and canonical source-bundle mapping below.

Source-backed criteria that still control this route: - Constructed stormwater wetlands are source-backed through Chapter 10.4. - Constructed-wetland GI use remains conditional on the real Chapter 12 and Chapter 13 support chain. - Constructed-wetland maintenance stays tied to forebay, vegetation, unwanted growth removal, and outlet performance.

Siting Constraints¶

The current source-backed siting review should focus on:

whether the site can support the footprint and hydraulic layout of a wetland BMP
whether the project is claiming GI or infiltration-based benefit without a real Chapter 12 / Chapter 13 support chain
whether vegetation, forebay access, and long-term maintenance can actually be sustained

Maintenance¶

Constructed-wetland maintenance remains management-intensive:

protect forebay capacity and inlet/outlet function
manage vegetation condition and unwanted growth removal
treat sediment accumulation and hydraulic short-circuiting as performance issues, not cosmetic ones

Source Bundles¶

Use these source bundles when checking the live extracted text or paired OCR evidence:

2023 bundle: Chapter 10.4 (2023_BMP_10_4) - Standard Constructed Wetlands
2026 bundle: Chapter 10.4 (2026_BMP_10_4) - Standard Constructed Wetlands