Alton Bay Seaplane Base (B18)

Location & QuickFacts

FAA Information Effective	2026-07-09
Airport Identifier	B18
Airport Status	Operational
Longitude/Latitude	71°14'13.2000" W / 43°28'39.3000" N -71.237000 / 43.477583 (Estimated)
Elevation	504.00 ft / 153.62 m (Estimated)
From nearest city	2 nautical miles N of Alton Bay, NH
Location	Belknap County, NH
Magnetic Variation	16W (1990)

Owner & Manager

Ownership	Publicly owned
Owner	STATE OF NEW HAMPSHIRE
Address	NHDOT, AERONAUTICS 7 HAZEN DR CONCORD, NH 03302
Phone number	603-271-2552
Manager	JASON LEAVITT
Address	7 HAZEN DR PO BOX 483 CONCORD, NH 03302
Phone number	603-545-2315

Airport Operations and Facilities

Airport Use	Open to public
Wind indicator	Yes
Segmented Circle	No
Control Tower	NON-ATCT
Sectional chart	NEW YORK
Region	ANE - New England
Responsible ARTCC	ZBW - BOSTON
Tie-in FSS	BGR - BANGOR
FSS Toll Free	1-800-WX-BRIEF
NOTAMs Facility	BGR (NOTAM-d service available)

Airport Communications

CTAF	122.8 MHz
UNICOM	122.8 MHz

Runway Information

Runway 01W/19W

Dimensions	2600 x 100 ft (792 x 30 m)
Surface	WATER (EXCELLENT)
Surface treatment

	01W	19W
Traffic pattern	Left	Left

Radio Navigation Aids

ID	Type	Name	Ch	Freq	Var	Dist
PSM	DME	PEASE	112X	116.50		29.5 nm
MHT	DME	MANCHESTER	91X	114.40		37.1 nm
LEB	DME	LEBANON	84X	113.70		44.3 nm
LWM	DME	LAWRENCE	72X	112.50		44.7 nm
CO	NDB	EPSOM		216.00	16W	23.5 nm
ESG	NDB	ROLLINS		260.00	16W	23.6 nm
MJ	NDB	FITZY		209.00	15W	39.0 nm
LAH	NDB	HANOVER		276.00	15W	43.1 nm
CNH	NDB	CLAREMONT		233.00	16W	49.9 nm
CON	VOR/DME	CONCORD	76X	112.90	15W	21.4 nm
ENE	VOR/DME	KENNEBUNK	118X	117.10	17W	27.4 nm
PWM	VOT	PORTLAND		111.00		41.7 nm

Remarks

• RWY 01W/19W PWRLINE MKD WITH ORANGE BALLS 1000 FT S OF THR AT S END; LESS THAN 30 FT HGT ALG ROADWAY.
• ALL SEAPLANE TKOFS & LDGS MUST BE N OF THE BANDSTAND. ALL TVL S OF THE BANDSTAND MUST NOT EXCEED HEADWAY SPD.
• FOR SEAPLANE PRKG & ICE RWY CONDS CALL 603-271-7398.
• FOR CD CTC BOSTON APCH 603-594-5552.
• TKOF & LDG USING RWY 19W PROHIBITED JAN - MAR.
• VFR USE ONLY.