Tree Trench¶

Tree trench is also a derived concept in the live citations layer, not a standalone BMP Manual chapter. In this corpus it is anchored to the small-scale bioretention and infiltration-source chapters, chiefly Chapter 9.7 and, where infiltration storage language matters, Chapter 9.8.

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

Overview¶

This page should be read as a source-derived urban application concept rather than as a separate chapter authority. A tree trench combines stormwater storage/treatment intent with tree-support infrastructure, but the governing source logic still comes from the live bioretention and infiltration chapters.

Source Mapping¶

This route is retained for site navigation, but the live citations layer flags a taxonomy or classification caution for it.

Route caution: Tree Trench / Tree Box Filter is not a separate BMP Manual chapter in 2023 or 2026. It draws from 9.7 (small-scale bioretention) and/or 9.8 (small-scale infiltration basins). All design criteria must cite their actual BMP Manual sources.
Route type: derived
2023 source bundle: Chapter 9.7 (2023_BMP_9_7) - Small-Scale Bioretention (tree trench is a subtype)
2026 source bundle: Chapter 9.7 (2026_BMP_9_7) - Small-Scale Bioretention (tree trench is a subtype)
Source-basis note: Tree Trench is not a standalone BMP Manual chapter. Derived from 9.7 (small-scale bioretention) and possibly 9.8 (small-scale infiltration basins). All design criteria must cite actual BMP Manual source sections.

Key verified claims already tied to this page manifest: - Tree trench is a derived concept anchored to Chapter 9.7 and 9.8 rather than a standalone source chapter. - Tree-trench infiltration claims remain tied to Chapter 12 and Chapter 13, not to the label alone.

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: - Tree trench is a derived concept anchored to Chapter 9.7 and 9.8 rather than a standalone source chapter. - Tree-trench infiltration claims remain tied to Chapter 12 and Chapter 13, not to the label alone.

Siting Constraints¶

The correct siting questions are:

whether the site can actually support an infiltration-based configuration
whether the project has the subsurface clearance and utility coordination to install the system
whether the claimed performance is being borrowed from a real source chapter rather than from the name alone

Maintenance¶

Maintenance remains a combined stormwater and tree-health issue:

preserve inlet and drainage function
monitor surface settlement or clogging
treat tree decline, root intrusion, and blocked underdrains as system-performance issues

Source Bundles¶

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

2023 bundle: Chapter 9.7 (2023_BMP_9_7) - Small-Scale Bioretention (tree trench is a subtype)
2026 bundle: Chapter 9.7 (2026_BMP_9_7) - Small-Scale Bioretention (tree trench is a subtype)