POWPLANET / GEOGRAPHIC REVIEW

Keystone terminal and bowl review

Qualified horizontal landmark spot-check, 2 November 2026. Both ends of all 20 mapped lift sections were compared with independent imagery. No coordinate correction was justified by the sampled evidence. This is not survey control or full geographic certification.

The 40 manually interpreted roof/frame centres or conveyor ends have a median separation of 3.36 m and maximum 12.17 m from the source endpoints. All fall inside a 25 m review tolerance. Picking uncertainty is approximately 10 m; recent imagery declares 8.47 m positional accuracy. Small numerical differences must not be read as metre-level true accuracy.

Lift scope

The sample covers 13 major aerial lifts and seven mapped carpet sections. Sun Kid is split into two sections, Double Barrel has a single mapped centreline, and Triangle has no reviewed geometry. These sections do not reproduce the official physical lift roster.

Show all 40 terminal landmark comparisons

Mapped lift	Source endpoint	Landmark separation
Santiago Express	first	4.00 m
Santiago Express	last	11.84 m
Ruby Express	first	0.34 m
Ruby Express	last	12.17 m
Wayback	first	1.60 m
Wayback	last	0.38 m
Outback Express	first	5.83 m
Outback Express	last	7.30 m
Outpost Gondola	first	2.49 m
Outpost Gondola	last	5.22 m
Bergman Express	first	6.81 m
Bergman Express	last	4.29 m
Discovery	first	6.18 m
Discovery	last	1.02 m
A-51	first	7.79 m
A-51	last	4.42 m
Peru Express	first	7.87 m
Peru Express	last	0.92 m
Montezuma Express	first	9.24 m
Montezuma Express	last	6.25 m
River Run Gondola	first	12.03 m
River Run Gondola	last	4.27 m
Summit Express	first	5.45 m
Summit Express	last	9.32 m
Ranger	first	1.38 m
Ranger	last	1.95 m
Sun Kid Lower	first	1.59 m
Sun Kid Lower	last	1.70 m
Sun Kid Upper	first	1.00 m
Sun Kid Upper	last	1.65 m
Double Barrel	first	0.53 m
Double Barrel	last	0.41 m
Kokomo	first	3.63 m
Kokomo	last	3.09 m
Mid-Station Ski School	first	2.15 m
Mid-Station Ski School	last	0.41 m
Cadillac	first	1.43 m
Cadillac	last	2.66 m
Tubing Hill	first	2.65 m
Tubing Hill	last	7.24 m

Bergman and Erickson bowls

Bergman Bowl: all 13 operator-listed names matched to source routes, retaining OSM aliases.
Erickson Bowl: all 3 operator-listed names matched to source routes, retaining OSM aliases.

Bergman routes occupy the northern side of the ridge; the Erickson routes descend south towards the Wayback/Outback valley, consistent with the operator's map and terrain. The upper Bergman ground sample is 3741.9 m, compared with the published upper reference of 3743.6 m. The difference is -1.7 m; no elevation was forced to match the brochure.

The map now labels Erickson separately. Matching names and broad geography does not establish precise trail edges or bowl boundaries. The North, South and Independence bowl inventories remain incomplete. Routes and widths are a geographic preview, not navigation instructions.

Forest coverage

Forest blocks use a reproducible classification of public-domain USDA NAIP imagery acquired on 22 September 2019. Trees stay within the estimated footprint below the illustrative treeline, with narrow gaps for mapped routes; source-tagged glades retain forest. Historic photographs can omit newer clearings. Shadows, dark grass and small trees can be misclassified. Individual tree shapes and heights remain illustrative.

Forest source, classifier and hashes · Classified reference mask

Sources and limits

USDA / USGS NAIP: public-domain imagery dated 22 September 2019. Esri / Vantor World Imagery was inspected as a reference only, with reported acquisition dates across this area from August 2023 to July 2025. No proprietary image pixels or newly traced coordinates are included in the map or this page. Bergman's visible terminal structures were under construction in the August 2023 reference; this is not final engineering certification.

Current operation, actual snow cover and every route/edge are outside this review.