Autodesk Civil 3D 2025 / 2026

The world's first constraint-driven pipeline grade engine for Civil 3D.

Terrain-aware. Bend-compliant. Cross-slope aware. Equipment slope limits enforced. One run.

PipeGrade Pro reads your terrain, enforces your pipe spec, resolves bend limits, redistributes slope for equipment access, and writes a fully compliant profile back to Civil 3D. No manual PVI placement. No iteration. No variation between designers.

See PipeGrade Pro → Request a Pilot
Click to expand
PipeGrade Pro Engine, Real Production Run
41 km
in 55 Seconds
1,230 PVIs generated, validated, and written to Civil 3D: bend compliance, slope redistribution, cross-slope awareness, and terrain clearance included. Manual workflows take days.
100%
Civil 3D Native
No new platform. No data migration. GLD Tools runs inside the environment your team already works in, writing output directly back into your drawings.
Full
Audit Trail
Every design decision is reproducible and reportable. Consistent QA output regardless of which designer runs the engine, on any project corridor.
Workflow Suites

One platform.
Four workflows.

GLD Tools is organized around the workflows pipeline engineers actually do, not internal module names. Each suite targets a distinct delivery phase, so your team adopts only what they need, and scales into the rest.

PipeGrade Pro FLAGSHIP

Profile Automation

Pipeline Grading & Profile Automation

  • Cross-slope-aware terrain sampling
  • Spec-driven cover, bend, and hot bend enforcement
  • Equipment-specific slope limits and redistribution
  • Pre-engineered hot bend whitelist and bend inventory
  • 4 optimization modes with automated PVI placement
  • 3D shapefile, LandXML, and compliance report export
CrossSections Pro LIVE

Quantities & Reporting

Cross Sections, Volumes, Excel/HTML Exports

  • Cross-section extraction and management
  • Volume calculations (cut/fill, corridors)
  • Excel and HTML export with professional themes
  • Compliance reports for submittals
  • PVI tables and grade summaries
Grading Pro BETA

Earthworks & Grading

Spoil Grading, Slope Takeoff, Corridor Automation

  • Spoil grading optimization
  • Slope takeoff and analysis
  • Corridor builder with preset assemblies
  • Batch processing for large projects
  • Mass haul diagrams and earthwork planning
Reporting Pro BETA

Reporting & Deliverables

Compliance Reports, Client Submittals, Construction Packages

  • Automated compliance report generation
  • Professional client submittal packages
  • Construction document preparation
  • Design review and QA workflows
  • Multi-alignment project coordination
The Problem

Pipeline grade design is slow.
PipeGrade Pro automates it.

Every pipeline engineer knows the cycle. Move a PVI, check the bend limits, adjust the profile, recheck cover, repeat. For every alignment. On every project. All to produce a single compliant Civil 3D profile.

Manual Pipeline Grading

The way it's done today

  • ✕ Move PVI manually in profile view
  • ✕ Check bend limits against a spreadsheet
  • ✕ Adjust profile to fix violations
  • ✕ Recheck cover depth at every station
  • ✕ Repeat dozens of times per alignment
  • ✕ Re-do the entire process for every pipe size or spec change
Often hours of iteration per alignment.
GLD Tools Platform

The way it should work

  • ✓ Samples terrain automatically along the alignment
  • ✓ Enforces pipe bend limits at every PVI
  • ✓ Maintains cover depth and clearance requirements
  • ✓ Applies rock zone and bedding rules automatically
  • ✓ Generates a fully compliant profile in seconds
  • ✓ Run multiple pipe size, bend spec, and joint length iterations in minutes — not weeks
Profile generated in seconds. Not days.
PipeGrade Pro
FLAGSHIP ENGINE
The grade engine
that thinks.

PipeGrade Pro mirrors the reasoning of a senior pipeline designer. It doesn't just offset a profile. It solves terrain, bends, hot bends, slope, physical pipe validity, and excavation in one closed-loop pass.

This is not a profile offset tool. It is not a smoothing pass on an existing grade. It builds the profile from terrain up, enforces every constraint simultaneously, and produces a result you can issue, not one you have to undo.

Request a Pilot → Full Engine Spec
PipeGrade Pro, 41 km processed in 55 seconds, 1230 PVIs
Auto-Profile Generator — alignment, offset profiles, pipe spec, optimization mode
Auto-Profile Generator: alignment selection, offset profiles, pipe spec, optimization mode, and constraint toggles. Click to expand.
01
Terrain-Aware Generation
Samples left offset, right offset, and EG profiles independently at joint intervals. Takes the controlling low-side elevation as the terrain ceiling, making the engine inherently cross-slope aware. Builds a 1 m resolution ceiling across the full corridor.
Active
02
Constraint Enforcement
Checks sag, overbend, terrain crossings, slope limits, locked stations, hot bend whitelist stations, and joint model validity.
Active
03
Local Optimization Solver
Evaluates competing fixes per violation: SpreadOverShoulders, AdjustNext, and more. Scores each with a construction-cost model and picks the cheapest valid option. On a recent 41 km run, 11 provisional hot bends were assigned, and the engine eliminated all 11 through grade redistribution, with only 1 confirmed via post-engine sweep.
Active
04
Verify / Polish Loop
Fixes terrain crossings, polishes PVIs upward to minimize cut, checks for new crossings, repeats. Closed-loop, not one-pass. On a 41 km corridor: 1,744 PVIs raised, zero surface crossings in the final output.
Active
05
Slope-Aware Construction Layer
Classifies every segment by construction risk band (Low, Moderate, High, Extreme). Identifies steep segments and redistributes slope across widening PVI windows (3→5→7→9) with escalating blend factors (60→95%). On a 41 km corridor: 101 steep segments improved across 12 passes, exceedances reduced from 53 to 14. Segments that remain steep after 20 passes are terrain-constrained and flagged for engineering review.
Active
06
Physical Joint Model Validation
Validates the optimized profile as a real pipe system: compound angle, bend centre placement, tangent lengths, exclusion zones, relocation logic.
Beta
What Happens When You Click Generate

Configure once. Run in seconds.

Select your alignment, pipe spec, and optimization mode. The engine handles the rest.

1

Select Inputs

Pick the alignment, offset profiles, pipe spec, cover table, and optimization mode. Toggle hot bend whitelist and joint model if needed.

2

Engine Runs

The six-layer engine samples terrain, enforces constraints, resolves violations, redistributes slope, and polishes the profile. Fully automatic.

3

Review in Profile Designer

Open the result in the Profile Designer. Full PVI table, compliance status, profile chart, and hot bend locations, all in one view.

4

Write & Export

Write the profile to Civil 3D. Export to Excel, HTML, LandXML, or 3D shapefile. Generate the Grade Report for QA sign-off and client submission.

PipeGrade Pro Profile Designer — PVI table, profile chart, bend compliance, export tools
Click to expand
Bending Compliance
Run full bend checks against pipe spec limits with color-coded pass/fail status
Data Band Export
Export PVI tables and data bands for profile sheets and construction drawings
LandXML Export
Export profiles in LandXML format for interoperability with other design platforms
3D Shapefile Export
Generate 3D shapefiles for direct import into Road Eng and Global Mapper
Profile Optimization Modes

Four optimization strategies,
one engine.

Every project has different priorities. PipeGrade Pro lets you choose the optimization strategy that matches your engineering requirements.

Legacy

Applies the minimum PVI corrections needed to satisfy bend limits. Produces a compliant profile that stays close to the original PVI positions.

Best for: Familiar workflows, backward compatibility

Minimum Excavation

Keeps the profile as high as possible within cover constraints. Uses conservative corrections and asymmetric lowering to minimise total excavation volume.

Best for: Cost-sensitive projects, shallow terrain

Smoothest Profile

Produces the smoothest possible grade line by minimising total deflection across all PVIs. Reduces bend severity through progressive flattening, prioritising a consistent grade.

Best for: Large-diameter pipe, minimal bending

Minimum PVIs

Generates a profile with the fewest possible PVI points while maintaining cover and bend compliance. Simplifies construction layout and reduces field survey effort.

Best for: Simple terrain, fast construction
Designed for Real Pipeline Constraints

This tool understands
real pipeline rules.

PipeGrade Pro enforces real-world pipeline construction rules that generic Civil 3D tools don't know about.

Pipe Joint Spacing

Samples at actual joint intervals from your pipe spec table, not arbitrary station increments.

Sag & Overbend Limits

Separate sag and overbend deflection limits checked at every PVI against your specification.

Terrain Clearance

Surface-aware cover depth enforcement at every station, not just at PVI points.

Cover Requirements

Station-range cover tables with pipe diameter, bedding thickness, and additional cut factors.

Cross-Slope Terrain Awareness

Samples the left bank, right bank, and existing ground independently. The pipe is always placed below the controlling low side, not just the centreline.

Equipment-Specific Slope Limits

Define wheeled, tracked, and winch equipment classes with separate max and preferred slope thresholds. The engine targets preferred and enforces max, with a redistribution pass that flags segments requiring special equipment.

Pre-Engineered Hot Bend Schedule

Specify required hot bend locations before running the engine. Client-specified bends at creek crossings, steep terrain, or structural requirements are locked in and excluded from violation flagging. Additional hot bends are auto-assigned from your project's available bend degrees only where the optimizer cannot resolve the violation by grade adjustment.

Every constraint is configurable. The engine adapts to your project specifications, not the other way around.

Every constraint is configurable

Pipe Profile Settings
Pipe Profile Settings
Click to expand
Slope Settings
Equipment-Specific Slope Limits
Max & preferred thresholds per equipment class. Click to expand
Pipe Bend Settings
Bend Settings & Hot Bend Whitelist
Pre-engineered locations & project bend inventory. Click to expand
Who It's For

Built for the full team.

From the CAD designer to the PM tracking delivery timelines.

01
Role: Designer

Senior Pipeline Designer

Responsible for producing constructible profiles under constraint. Iterates pipe sizes, bend specs, and cover requirements across dozens of alignments per project.

“The engine reasons through terrain, bends, hot bend placement, and slope risk, and produces a validated first-pass you can actually issue from.”

02
Role: Leadership

Engineering PM / Principal

Accountable for schedule and quality across multiple active corridors. Senior staff are stretched thin. Late-stage rework is the most expensive risk on the project.

“Profile design and validation in hours, not days. Every output is auditable, repeatable, and independent of who runs the engine.”

03
Role: Procurement

EPC Technology Lead

Evaluates tools against deployment risk, training cost, and integration overhead. Needs clear ROI tied to measurable schedule and cost reduction.

“Civil 3D-native. No new platform. Outputs feed directly into existing design, reporting, and mechanical workflows.”

═══ GLD Tools — Auto-Profile Generation Log ═══
══ Start: 0.0 m  End: 40,998.8 m  Joint: 24.0 m

—— Pass 1: Adaptive Coarse Sampling
[ 12.41s] Completed — 1,261 candidate PVIs sampled

—— Pass 2: Terrain Ceiling (1 m resolution)
[ 22.08s] Completed — 40,998 ceiling samples

—— Phase A: Bend Compliance
[ 22.24s] Converged after 4 passes
[ 22.26s] Pruned 1261 → 1,230 PVIs

—— Engine Optimization
[ 24.51s] 11 provisional hot bends — all 11 removed via redistribution
[ 24.88s] All segments below grade after 25 fix passes
[ 25.14s] Polish raised 1,744 PVIs to minimize cut

—— Slope Redistribution
[ 38.60s] 53 steep segments → 101 improved across 12 passes
         Exceedances reduced: 53 → 14

—— Hot Bend Confirmation
[ 52.11s] 11 provisional removed, 0 resized
         1 confirmed hot bend (post-engine sweep)

—— FINAL VALIDATION
  PVIs: 1,230    Violations: 1
  Crossings: 0 ✅    Hot bends: 1
  COMPLETE — Elapsed: 55.02s
Real Engine Output

41 km. 1,230 PVIs.
Under 55 seconds.

This is a real engine run on a production corridor, not a demo. PipeGrade Pro processed the full alignment, optimized the grade, and wrote the profile to Civil 3D in a single run.

  • ✓ 1,261 candidate PVIs sampled, pruned and optimized to 1,230
  • ✓ 11 provisional hot bends → all 11 eliminated by the optimizer, 1 confirmed via post-engine sweep
  • ✓ 101 steep segments improved across 12 slope redistribution passes (53→14 exceedances)
  • ✓ 1,744 PVIs polished upward to minimize excavation volume
  • ✓ Zero surface crossings in the final validated profile
  • ✓ 3D shapefile export for direct import into Road Eng
View Sample Grade Report →
Auditable Engineering Output

Traceable from input
to final profile.

Every run produces a complete Grade Report, not a summary, but a full record of the engine's decisions. Every constraint applied, every violation resolved, every optimization pass logged. The output is built for third-party review and internal QA sign-off.

  • ✓ Complete PVI table with station, elevation, grade-in/out, deflection, and bend classification
  • ✓ Violation resolution log: what was flagged, how it was fixed, and the cost model score
  • ✓ Slope analysis with construction risk bands and excavation indicators
  • ✓ Hot bend schedule: station, degree, deflection, and confirmed/eliminated status
  • ✓ Reproducible results: same inputs, same constraints, same profile every time
  • ✓ Export to HTML or Excel workbook for client deliverables and internal review
Browse a real Grade Report
PL-DESIGN-01, 41 km corridor. 8 tabs. Every decision logged.
Open Live Report →
Grade Summary — quality metrics, deflection statistics, runtime
Design Slope Analysis — rolling average classification with risk bands
Existing Ground Slope Analysis — terrain classification and risk windows
Slope Comparison — EG vs Design with improvement metrics
Hot Bend Locations — station, degree, deflection, type
Violations and Warnings Report — flagged items with resolutions
PVI Table — full station, elevation, grade, deflection data
Engine Optimization Log — step-by-step optimization phases
Quality metrics, deflection statistics, and runtime performance — click to expand

Grade Report: PL-DESIGN-02, 41 km corridor. Click any tab to explore.

Expanded view
About

Built by a pipeline designer,
for pipeline designers.

Ground Level Design Inc. builds tools for the engineers who build infrastructure. We develop professional-grade software for civil engineering and linear infrastructure design, with a focus on Autodesk Civil 3D integration.

GLD Tools grew out of real project demands, major pipeline programs where grade planning had to keep pace with construction schedules, not hold them back. We needed to iterate pipe sizes, bend specs, and joint configurations quickly enough to support constructability assessments, cost-driven route selection, and permitting submissions, all before a single stake went in the ground.

Today, teams use GLD Tools across the full project lifecycle: early-stage footprint and corridor evaluation, detailed grade generation for design deliverables, construction slope and equipment access planning, and machine control-ready profile exports. The goal is the same at every phase: identify issues early, reduce rework, and minimize project costs.

kmoffat@groundlevel.design →

Early Access: Pilot Programme
Run one corridor.
Keep the output.

Give us one real project corridor. We run it through the engine alongside your team's manual process. You keep the validated output either way. We want your honest comparison.

Book a Workflow Review →

Annual licensing available. Contact for early adopter pricing.

How the Pilot Works
01
You nominate a corridor One real project alignment. Your most complex if you prefer.
02
We configure the engine Pipe spec, cover rules, bend limits, slope bands, matched to your project.
03
Side-by-side comparison GLD Tools output vs. your team's manual process. Timed and documented.
04
You keep the deliverable The validated grade, reports, and exports are yours regardless of outcome.
05
Honest debrief We want your real feedback. No pressure conversion, just the comparison.

Run one corridor.
See the difference in hours.

Founder-led, no generic sales pitch. A real conversation about your projects and how the engine performs against your team's manual process.

Book a Workflow Review → Pilot Programme

Annual per-seat licensing. Early adopter pricing available for pilot participants.