GHRM Assessment · NANCY

1

Project definition

Choose the network type and owner, name the project and the client, give the site an ID, and record why the assessment is being done. These details carry through to the cover, transmittal letter and site sheet of the report.

Network and owner

RailroadClass I, regional, short line or passenger State DOTState highway network, or a county, toll or municipal road agency

Railroad State DOT or road agency Facility type Subdivision Milepost from Milepost to

Railroad, subdivision and milepost limits fill automatically after the Step 3 data pull where the centerline and milepost libraries cover the site.

The state DOT and the nearest National Highway System route fill automatically after the Step 3 data pull. Enter mile markers from the DOT's linear referencing.

Project

Project name Client Site ID Report date

Purpose and scope

Purpose of assessment Client project / work order no. Project description

Transmittal details

Prepared by Title Attention Address

2

Site boundary

Upload the assessment polygon, draw it, or enter a latitude and longitude. Lines become a corridor and points become a circle.

Drop a boundary file here or click to choose · KMZ / KML from Google Earth (folders, multi-geometry) · GeoJSON · zipped shapefile · CSV of lat,lon vertices

or

Latitude Longitude Radius (ft)

More options: paste a boundary, corridor width, reference layers

Line → corridor half-width (ft)

Add a KMZ / KML / GeoJSON reference layer

Boundary

3

Geospatial data

One click queries the federal, state and local records for the boundary: topography, soils, flood, wetlands, rail, terrain history, parcels, and a site hazard screening of nearby assets, borings, wells, landslides and flood history. Everything found goes into the report with its source.

Query buffer (ft)

Parcel layer (optional county source)

ArcGIS REST parcel layer URL

Statewide parcels are queried automatically for NC, VT, CT and NY. Elsewhere, paste the county's parcel layer (find it through the county GIS link in the local tier). Leave blank to use the statewide layer.

Dataset status

Federal / national dataset	Reliability	Status	Result

Site hazard screening · assets, borings, wells, landslides, flood and storm history

Topography · USGS 3DEP 1 m

Alignment profile · state LiDAR DEM along the track or roadway, grade, fill and cut

Soils · SSURGO, USDA texture, USCS, AASHTO

Terrain history · maps, imagery, land cover, LiDAR, landslides, rail accidents, disasters

Property ownership · parcels

4

Field verification and operational inputs

The risk score is provisional until someone walks the site. Record the visit, score the conditions you see today, and confirm or correct each item of the desktop study. Field observations govern where they differ from the public data.

A · Site visit

Verification level Date verified Verified by Conditions at time of visit Photo log / field notes reference

B · Current conditions observed

Score what is on the ground today. Each observation blends with the desktop score of the elements it informs.

Ditch condition (drainage evolution) Historic instability Culvert condition Scarps, tension cracks, bulging Seepage and saturation Toe erosion and scour Track and roadbed settlement Failure observed at this site (calibration)

C · Desktop study verification

Check each desktop item against what you see. Desktop scores fill in after the Step 3 data pull.

D · Railroad records and imagery review

Land use & vegetation change (imagery) Track geometry defects, last 10 years Field comment (railroad personnel)

Traffic, consequence and seismic inputs

Annual traffic (MGT) AADT (vehicles per day) Passenger service Hazmat / key route Detour route available Seismic PGA_M (g), from ATC Hazards by Location

Consequence and exposure (risk matrix and benefit–cost)

Kept separate from the hazard score. Passenger, hazmat and detour above also count.

Maximum timetable speed (mph) Trains per day Sight distance / curvature Detection and warning Outage per event (days) Outage cost per day ($) Repair cost per event ($) Third-party exposure Existing mitigation

Other ground hazards and rockfall rating

Beaver activity Karst or mine subsidence Debris flow

Rockfall rating (rock cuts; USMP / RHRS categories scored 3, 9, 27 or 81): not rated

Ditch / catchment effectivenessRockfall historyBlock size or volume per eventSlope heightGeologic characterRockfall maintenance frequencyClimate and water

5

Risk score

Auto scores are suggestions with their basis shown. Type a value in Override to replace any one. R_c is the weighted composite of the element scores, and stays provisional until the field verification in Step 4 is complete.

Soil classification basis

Surficial Soils score uses

Desktop assessment · Historical Terrain Attributes

Attribute and basis	Auto	Override	Used

Composite Ground Hazard Score

Element and basis	Auto	Weight	Override	Used

6

Stabilization alternatives and residual risk

Screened by driving hazard from the techniques that apply to the selected network (drainage, earthwork, structural, ground improvement, track substructure on railroads, rock slopes, scour and erosion, monitoring), drawn from the GHRM Manual and FHWA, TRB, SHRP2 and USACE guidance. Select the recommended alternative. Construction costs can be filled from the NANCY cost database (public bid prices adjusted to the site's state in 2026 or 2027 dollars) or entered directly. R_r uses default element reduction factors; methods tagged draft have provisional factors. Confirm by analysis.

Life-cycle settings (benefit–cost)

Discount rate (%) Service life (years)

Event cost (repair + outage) comes from Step 4 → Consequence and exposure. BCR uses the draft annual-probability scale in nancy-risk.js; confirm before programming decisions.

Show all 63 techniques for this network

Technique (select recommended)	Relative cost	ROW / Ops impact	R_c	R_r	Construction $	PM/Admin $	BCR	Annual cost

7

Assessment report

Transmittal letter, site sheet, site characterization, site hazard screening with cited sources, scoring, permits and next steps.

Action plan responsibilities (RASIC)

Responsible Approver Support Informed Consulted

Portfolio ranking and calibration (multiple sites)

Load saved assessments to rank sites by risk, and mark observed failures to test how well the scores separate failed from stable sites.

Load saved assessments (.json)

Site hazard screening lookups

Save and export