Airport information
- FAA LID
- B70
- Coordinates
- 48.3137, -111.1081
- Elevation
- 3,023 ft MSL
- Magnetic variation
- 17E
- Sectional chart
- GREAT FALLS
- Airport use
- Public
- Control tower
- No
- ARTCC
- SALT LAKE CITY (ZLC)
- Flight service (FSS)
- GREAT FALLS
- NOTAM facility
- GTF
- Attendance
- UNATNDD
- Segmented circle
- Yes
- Wind indicator
- yes
- Activated
- 1988/04
- Distance from city
- 1 SW
Weather
METAR observed
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TAF forecast
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Sun & FAA night 2026-06-21
| Event | Local (MDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 04:41 AM | 10:41Z |
| Sunrise | 05:23 AM | 11:23Z |
| Sunset | 09:29 PM | 03:29Z |
| Evening civil twilight Loggable night begins | 10:11 PM | 04:11Z |
Plan a flight from B70
Night operations
- Pilot-controlled lighting
- Usually keyed on CTAF 122.9 — confirm the click sequence in the Chart Supplement ↗
FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are in the live weather panel above.
Traffic pattern
- Landing
- Rwy 12
- Pattern
- left (turns left)
- TPA
- 4,000 ft MSL (≈1,000 AGL)
- CTAF
- 122.9
Enter the left downwind for Rwy 12 at 4,000 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).
Runway 12/30
2,550 ft × 90 ft · Turf (Good)- Heading
- n/a
- Traffic pattern
- Left
- Heading
- n/a
- Traffic pattern
- Left
- Approach obstacle
- Road, 15 ft, 150 ft from threshold, 0 ft B of centerline — 10:1 slope to clear · penetrates the 20:1 visual approach surface
| Runway | Length | Your margin |
|---|---|---|
| 12/30 | 2,550 ft |
Communication frequencies
| Service | Frequency | Notes |
|---|---|---|
| CTAF | 122.9 |
Source: FAA NASR (current 28-day cycle).
Chart Supplement FAA A/FD
Open PDF ↗Preview Chart Supplement
VFR sectional
Services
- Parking
- tiedowns
Ownership & management
Remarks FAA
- VFR USE ONLY.
- NO SNOW REMOVAL.
- RY 12/30 MAY BE ROUGH.
- FOR CD CTC SALT LAKE ARTCC AT 801-320-2568.
- ROAD XNG RWY NEAR MIDPT.
- 12/30 MARKED WITH WHITE CONES FULL LENGTH SPACED EVERY 200 FT.
Nearby airports
Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open B70 in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator. Planning from here? Find the nearest airport with fuel or an approach, or check whether an IFR alternate is required.
About B70
Tiber Dam Airport (B70) is an airport in Chester, MT, at 3,023 ft MSL. It has 1 runway, the longest 2,550 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for B70, refreshed from the Aviation Weather Center and FAA NASR.
Does B70 have a control tower?
No. Tiber Dam Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.
What is the longest runway at B70?
Tiber Dam Airport has 1 runway; the longest is 2,550 ft. See the Runways tab for headings, surface, and lighting.
Where is B70?
Tiber Dam Airport is in Chester, MT, at an elevation of 3,023 ft MSL. Coordinates: 48.3137, -111.1081.
Fly out of B70 often?
Save B70 as your home base in the SkyReady app for a one-tap Go/No-Go readiness brief, weather alerts, and automatic FAA currency — free to log.