Forest Stand Delineation: Levels, Fieldwork, and Review

A forest stand delineation in Maryland is a field-based inventory of trees, soils, streams, and other natural features on a property, required before most grading permits, sediment control permits, or subdivision approvals are issued under the Maryland Forest Conservation Act.¹ It documents what lives on the land before any clearing happens, and it becomes the foundation for the forest conservation plan that dictates how much forest you must keep, replant, or pay to offset. That makes it one of the first entitlement steps that actually shapes a project’s buildable footprint.

When You Need One

The requirement is triggered whenever an applicant seeks a grading permit, sediment control permit, or subdivision approval on a tract of land.¹ The statute defines “forest” as a biological community dominated by trees that covers 10,000 square feet or more, so even modest wooded patches on a parcel can pull a project into the program.

Local jurisdictions administer the program under state oversight, and each one maintains its own exemption list. Agricultural activities with approved sediment control practices, certain single-lot residential construction under clearing thresholds, tree nurseries, and emergency utility repairs are common exemptions, but the details differ enough between counties that the planning office is the right first call. Confirm your project’s status before you spend money on consultants.

The Three Levels of Delineation

Maryland regulations recognize three tiers of delineation, and the one your project qualifies for drives both the cost and the turnaround.

Simplified. Available when no forest will be removed, or when all forest on the site will be placed under a long-term protective agreement. The deliverable is relatively light: field-verified forest boundaries, dominant species, a proposed limit of disturbance, and the proposed protection areas.²
Intermediate. Allowed when the project will retain forest at or above the break-even threshold calculated under Natural Resources Article section 5-1606 and no priority forests or priority retention areas will be disturbed. A walk-through survey by a qualified professional confirms the conditions and documents species composition, acreage of proposed disturbance, and the recovery potential of adjacent forest.²
Full. Required for any project that does not qualify for the simplified or intermediate tiers. It demands field sampling at a minimum 67 percent confidence level, species-specific composition data, stand structure and condition analysis, and an evaluation of areas for retention versus disturbance.²

Most commercial and residential subdivision projects land in the full category, either because they plan to clear a priority area or because they cannot prove the retention threshold without the data a full delineation produces.

Who Can Prepare It

The report must be prepared by a licensed forester, a licensed landscape architect, or a qualified professional approved by the Department of Natural Resources.³ Someone without a forestry or landscape architecture license can earn qualified-professional status by meeting education or experience requirements and completing a DNR-approved training course.

Qualifying education paths include a four-year degree in natural resource sciences, natural resource management, landscape planning, or environmental planning. Four years of professional experience in those fields also satisfies the requirement, as does a graduate degree in natural resources combined with one year of professional experience.³ The state Forest Conservation Act coordinator issues final approval.⁴ Agencies verify preparer credentials before they open the report, so hiring outside this list is one of the fastest ways to get a submission rejected.

What the Fieldwork Captures

Every delineation starts with an environmental features map. Regulations require that map to show 100-year nontidal floodplains, intermittent and perennial streams with buffers of at least 50 feet from the top of the normal bank, slopes of 25 percent or more, critical habitat areas, tidal and nontidal wetlands with buffers, topographic contours, and soils data including hydric soils and erodible soils on slopes of 15 percent or more.²

Tree Data and Specimen Trees

In a full delineation, field crews identify tree species and record diameter at breast height, meaning trunk width measured four and a half feet above the ground. Those measurements feed basal area calculations that quantify tree density and maturity across each stand.

Specimen trees get separate attention. Under the Forest Conservation Act, a specimen tree is one measuring 30 inches or more in DBH, or one that reaches 75 percent or more of the diameter of the current state champion tree for that species. Removing a specimen tree during development triggers additional review and mitigation, so missing one in the field creates problems that surface later in the process, when they cost more to fix.

The crew also records herbaceous ground cover, downed woody debris, and the presence of invasive species, all of which affect the ecological rating of the stand and the management recommendations in the final report.

Forest Interior Dwelling Species

Properties with larger forest tracts may need a forest interior dwelling species assessment. Under Maryland’s Critical Area guidance, forests of at least 50 acres containing 10 or more acres more than 300 feet from the nearest forest edge qualify as potential FIDS habitat, as do riparian forests of at least 50 acres with an average width of 300 feet along a perennial stream.⁵ The surveys themselves must be done between May 25 and June 30, so missing the window pushes a project back nearly a year.

Priority Areas Can Change Your Level

Fieldwork does more than inventory conditions. It identifies which parts of the site the regulations treat as priorities for retention, afforestation, or reforestation, including stream and coastal bay buffers, forested corridors connecting fragmented patches, critical habitat buffers, steep slopes, land-use transition zones, additions to existing contiguous forest, and 100-year floodplains.⁶

If an intermediate delineation turns up a development footprint that overlaps a priority area, the project automatically escalates to a full delineation. Scoping this risk before fieldwork begins keeps you from paying for the wrong tier of analysis.

The Report Package

The submission bundles three pieces: a narrative, a forest stand map, and data summary tables. The narrative describes each identified stand’s species composition, structure, health, and site conditions, and explains why specific areas are flagged for retention or suitable for disturbance.

The forest stand map is the main visual. It must be drawn to scale and show forest boundaries, sample plot locations, specimen tree positions, and the environmental features from the base map. Coordinates have to align with later site plans and grading drawings, and some jurisdictions require both an electronic upload and a signed paper copy.⁷ The data tables convert field measurements into a standardized format using official worksheets. Data-entry errors in this section drive a disproportionate share of revision requests.

Submittal, Review, and Timeline

Completed packages go to the appropriate DNR regional receiving center based on the project’s county, or to the local planning authority if the jurisdiction runs its own approved forest conservation program.⁸ Administrative fees apply and vary by jurisdiction and project scope.

Agency staff review for completeness and verify the field data, typically through an on-site visit that checks reported tree diameters, species identifications, and boundary lines against actual conditions. For the forest conservation plan stage that follows, the statute gives the reviewing authority 45 days from receipt to notify the applicant whether the plan is complete; if the agency fails to respond within that window, the plan is deemed complete and approved by operation of law. The agency can extend the deadline by 15 days for extenuating circumstances, and the applicant can also request an extension.⁹

Revision rounds are where projects lose weeks. The most common triggers are misidentified species, inaccurate forest boundaries, and missing documentation of priority retention areas.

From Delineation to Forest Conservation Plan

Approval of the delineation is not the finish line. It becomes the base document for the preliminary forest conservation plan, which must include the approved delineation drawn to scale along with tables showing existing forest cover, proposed clearing, reforestation and afforestation acreage, retention areas, and the applicable conservation threshold percentage.¹⁰

The conservation plan has to be submitted a reasonable time before a preliminary plan of subdivision and is typically reviewed concurrently with the preliminary site plan.¹⁰ If the plan designates off-site planting, a separate map of the proposed planting location must show soils, environmental features, and whether the site qualifies as a priority planting area.

Fee-in-Lieu

When on-site retention or replanting cannot meet the conservation threshold, developers can pay into the State Forest Conservation Fund. The rates adjust annually for inflation. Inside a priority funding area the rate is 30.5 cents per square foot of required planting area; outside a priority funding area it is 36.6 cents per square foot.¹¹ On larger sites those numbers accumulate quickly, which is why most developers treat fee-in-lieu as a backstop rather than a strategy.

Validity and Long-Term Protection

An approved forest stand delineation stays valid for five years. After that, it must be updated and re-approved unless the entire property has already been folded into a single approved forest conservation plan.¹² Projects that stall in permitting routinely hit this expiration, and recertifying a lapsed delineation often means paying for fresh fieldwork if conditions have changed.

Forest areas designated for retention or planted through reforestation and afforestation must be protected under a legally binding long-term agreement. Acceptable instruments include covenants running with the land, deed restrictions, conservation easements, and land trusts. The agreement must limit future use of the protected area to activities consistent with forest conservation, and it must be recorded in the local land records office within 30 days of execution.¹³ Recording binds future owners, so anyone buying the land inherits the conservation obligations whether they knew about them at closing or not.

1
Justia Law. Maryland Code Natural Resources 5-1601 – Definitions
2
Legal Information Institute. Maryland Code of Regulations 08.19.04.02 – Forest Stand Delineation Submittal Procedures
3
Library of Maryland Regulations. COMAR 08.19.06.01 – Qualified Professional
4
Maryland OneStop. Forest Conservation Act – Qualified Professional
5
Maryland Department of Natural Resources. A Guide to the Conservation of Forest Interior Dwelling Birds in the Chesapeake Bay Critical Area
6
Legal Information Institute. Maryland Code of Regulations 08.19.04.08 – Reforestation
7
Montgomery Planning. NRI/FSD Upload Guide Submission Requirements
8
Maryland Department of Natural Resources. Forest Conservation Act Requirements
9
New York Codes, Rules and Regulations. Maryland Natural Resources 5-1605 – Proposed Forest Conservation Plans
10
Library of Maryland Regulations. COMAR 08.19.04.04 – Preliminary Forest Conservation Plan Submittal Procedures
11
Library of Maryland Regulations. COMAR 08.19.04.09 – State Forest Conservation Fund
12
Maryland Department of Natural Resources. Forest Conservation Technical Manual, 4th Edition
13
Legal Information Institute. Maryland Code of Regulations 08.19.05.02 – Long-Term Protective Agreements