U.S. Tri-State Corners, coordinates table

Arranged generally from west to east and numbered the same as in Jack Parsell's Tri-State Corners guide. There are two tri-points associated with the District of Columbia and to distinguish these I have labelled them 32N and 32S for the northern and southern points.

Key to Column Headings

States = The standard two character postal abbreviation for the three states. Tri-Point Name = The name of the benchmark at the tri-point. If no BM name can be found then a PXXXX ft. is assigned from the elevation at the tri-point. If PXXXX m. is shown then the topo map is metric. Lat = The latitude in deg., min., sec. format. Long = The longitude in deg., min., sec. format. UTM,E = The UTM Easting coordinate in meters. UTM,N = The UTM Northing coordinate in meters. Zone = The UTM zone. Topo Map (7.5 min.) = The topo map the tri-point is on. Maps with an asterisk after the name are 7.5 X 15 min.

Note: Latitude and Longitude are in NAD83 datum. UTM coordinates are in NAD27. The UTM coordinates are the same as given in the waypoint file which you can upload to your Garmin GPS receiver. See TriPoint.txt

ID
States
Tri-point Name
Lat
Long
UTM,E
UTM,N
Zone
Topo Map (7.5 min)

1 OR, CA, NV Boundary Post CA NV OR 415941.74 1195958.26 251632 4653368 11T Barrell Springs (NV)

2 OR, ID, NV Boundary ID OR NV 420000.90 1170134.42 497910 4649600 11T Star Valley Knoll (OR)

3 ID, NV, UT Three Corners 415937.90 1140229.30 745120 4653130 11T Nile Spring (NV)

4 NV, UT, AZ Boundary Initial Mon AZ NV UT 370000.69 1140300.18 762590 4098770 11S Terry Benches (UT)

5 MT, ID, WY P8330 ft 442832.27 1110308.62 495830 4924760 12T Buffalo Lake NE (ID)

6 ID, UT, WY Boundary Cor ID UT WY BLM 420005.84 1110248.29 496200 4649770 12T Boundary Ridge (ID)

7 WY, UT, CO GLO 28 CO UT WY 410002.49 1090300.09 664060 4540460 12T Red Creek Ranch (WY)

8 UT, CO, AZ, NM CO UT AZ NM 365956.32 1090242.62 674000 4096340 12S Teec Nos Pos (AZ)

9 MT, ND, SD Boundary Mon 360M 455642.97 1040243.97 574020 5088190 13T Snider Hill (MT)

10 MT, WY, SD NE Corner Wyoming 445951.43 1040327.73 574300 4982900 13T Gravel Draw (WY)

11 WY, SD, NE Chaffee Monument 430002.25 1040311.32 577220 4761110 13T Oat Creek (WY)

12 WY, NE, CO Boundary Mon CO NE WY 410006.01 1040311.40 579680 4539180 13T Pine Bluff SE (WY)

13 CO, NE, KS Boundary Mon CO KS NE 400011.60 1020306.39 751740 4432060 13T Laird (CO)

14 CO, NM, OK Boundary MI Cor CO NM OK 370000.54 1030008.39 677801 4096550 13S Goodson School (NM)

15 NM, OK, TX Texhomex 363001.67 1030008.58 678953 4041112 13S Rardin Hill (NM)

16 CO, KS, OK Boundary Mon CO KS OK 365935.04 1020231.64 763283 4097990 13S Sturgis (OK)

17 ND, SD, MN P970 ft 455606.93 963348.21 688922 5089526 14T Boisberg (MN)

18 SD, MN, IA P1410 ft 433001.51 962711.84 705921 4819325 14T Valley Springs (MN)

19 KS, OK, MO Boundary Mon KS MO OK 365954.96 943704.55 356049 4095731 15S Racine (MO)

20 OK, MO, AR Boundary Mon AR MO OK 362958.17 943704.28 355125 4040361 15S Colcord NE (AR)

21 TX, AR, LA Boundary Mon AR LA TX 330109.27 940234.96 402600 3653700 15S Ravanna (TX)

22 IN, MI, OH Ohio Mich Bdry Cor WP 414146.06 844821.24 682579 4618150 16T Clear Lake (IN)

23 TN, AL, GA SL 1 345905.1 853618.9 627300 3872030 16S New Home (GA)

24 AL, FL, GA P70 ft 310023.1 850008.5 690710 3431820 16S Saffold (AL)

25 TN, NC, GA P1760 ft 345918.4 841918.6 744450 3874830 16S Mineral Bluff (GA)

26 NC, GA, SC Ellicott Rock 350004.88 830630.84 307565 3875020 17S Cashiers (GA)

27 KY, VA, TN Virginia Corner 2 Reset 363602.76 834031.24 260670 4053715 17S Middlesboro South (TN)

28 TN, VA, NC North Carolina Corner Reset 363517.39 814038.82 439387 4049186 17S Grayson (TN)

29 KY, VA, WV P827 ft 373216.6 815805.0 414460 4154780 17S Wharncliffe (WV)

30 PA, WV, MD Mon 34 394316.2 792836.2 630538 4397707 17S Friendsville (MD)

31 MD, WV, VA P260 ft 391915.8 774309.0 265560 4355720 18S Harpers Ferry (VA)

32N VA, DC, MD VA DC MD 385603.72 770711.33 316230 4311406 18S Washington West (MD)

32S VA, DC, MD Boundry Mark 14 DC VA 384728.25 770222.23 322860 4295570 18S Alexandria (VA)

33 PA, MD, DE MDP Corner 394320.83 754718.91 432420 4397210 18S Newark West (MD)

34 NY, PA, NJ Tri States 1942 412126.18 744141.00 525500 4578230 18T Port Jervis South (NJ)

35 MA, NY, CT Boundary Bound CT MA NY 420259.40 733117.20 625149 4656170 18T Ashley Falls (MA)*

36 VT, NY, MA Boundary Bound MA NY VT 424444.90 731552.40 641940 4733790 18T Berlin (NY)*

37 VT, NH, MA P60 m 424335.9 722729.7 708060 4733380 18T Northfield (MA)*

38 CT, MA, RI Tri State 420028.70 714757.21 268154 4654254 19T Webster (MA)*

ID	States	Tri-point Name	Lat	Long	UTM,E	UTM,N	Zone	Topo Map (7.5 min)
1	OR, CA, NV	Boundary Post CA NV OR	415941.74	1195958.26	251632	4653368	11T	Barrell Springs (NV)
2	OR, ID, NV	Boundary ID OR NV	420000.90	1170134.42	497910	4649600	11T	Star Valley Knoll (OR)
3	ID, NV, UT	Three Corners	415937.90	1140229.30	745120	4653130	11T	Nile Spring (NV)
4	NV, UT, AZ	Boundary Initial Mon AZ NV UT	370000.69	1140300.18	762590	4098770	11S	Terry Benches (UT)
5	MT, ID, WY	P8330 ft	442832.27	1110308.62	495830	4924760	12T	Buffalo Lake NE (ID)
6	ID, UT, WY	Boundary Cor ID UT WY BLM	420005.84	1110248.29	496200	4649770	12T	Boundary Ridge (ID)
7	WY, UT, CO	GLO 28 CO UT WY	410002.49	1090300.09	664060	4540460	12T	Red Creek Ranch (WY)
8	UT, CO, AZ, NM	CO UT AZ NM	365956.32	1090242.62	674000	4096340	12S	Teec Nos Pos (AZ)
9	MT, ND, SD	Boundary Mon 360M	455642.97	1040243.97	574020	5088190	13T	Snider Hill (MT)
10	MT, WY, SD	NE Corner Wyoming	445951.43	1040327.73	574300	4982900	13T	Gravel Draw (WY)
11	WY, SD, NE	Chaffee Monument	430002.25	1040311.32	577220	4761110	13T	Oat Creek (WY)
12	WY, NE, CO	Boundary Mon CO NE WY	410006.01	1040311.40	579680	4539180	13T	Pine Bluff SE (WY)
13	CO, NE, KS	Boundary Mon CO KS NE	400011.60	1020306.39	751740	4432060	13T	Laird (CO)
14	CO, NM, OK	Boundary MI Cor CO NM OK	370000.54	1030008.39	677801	4096550	13S	Goodson School (NM)
15	NM, OK, TX	Texhomex	363001.67	1030008.58	678953	4041112	13S	Rardin Hill (NM)
16	CO, KS, OK	Boundary Mon CO KS OK	365935.04	1020231.64	763283	4097990	13S	Sturgis (OK)
17	ND, SD, MN	P970 ft	455606.93	963348.21	688922	5089526	14T	Boisberg (MN)
18	SD, MN, IA	P1410 ft	433001.51	962711.84	705921	4819325	14T	Valley Springs (MN)
19	KS, OK, MO	Boundary Mon KS MO OK	365954.96	943704.55	356049	4095731	15S	Racine (MO)
20	OK, MO, AR	Boundary Mon AR MO OK	362958.17	943704.28	355125	4040361	15S	Colcord NE (AR)
21	TX, AR, LA	Boundary Mon AR LA TX	330109.27	940234.96	402600	3653700	15S	Ravanna (TX)
22	IN, MI, OH	Ohio Mich Bdry Cor WP	414146.06	844821.24	682579	4618150	16T	Clear Lake (IN)
23	TN, AL, GA	SL 1	345905.1	853618.9	627300	3872030	16S	New Home (GA)
24	AL, FL, GA	P70 ft	310023.1	850008.5	690710	3431820	16S	Saffold (AL)
25	TN, NC, GA	P1760 ft	345918.4	841918.6	744450	3874830	16S	Mineral Bluff (GA)
26	NC, GA, SC	Ellicott Rock	350004.88	830630.84	307565	3875020	17S	Cashiers (GA)
27	KY, VA, TN	Virginia Corner 2 Reset	363602.76	834031.24	260670	4053715	17S	Middlesboro South (TN)
28	TN, VA, NC	North Carolina Corner Reset	363517.39	814038.82	439387	4049186	17S	Grayson (TN)
29	KY, VA, WV	P827 ft	373216.6	815805.0	414460	4154780	17S	Wharncliffe (WV)
30	PA, WV, MD	Mon 34	394316.2	792836.2	630538	4397707	17S	Friendsville (MD)
31	MD, WV, VA	P260 ft	391915.8	774309.0	265560	4355720	18S	Harpers Ferry (VA)
32N	VA, DC, MD	VA DC MD	385603.72	770711.33	316230	4311406	18S	Washington West (MD)
32S	VA, DC, MD	Boundry Mark 14 DC VA	384728.25	770222.23	322860	4295570	18S	Alexandria (VA)
33	PA, MD, DE	MDP Corner	394320.83	754718.91	432420	4397210	18S	Newark West (MD)
34	NY, PA, NJ	Tri States 1942	412126.18	744141.00	525500	4578230	18T	Port Jervis South (NJ)
35	MA, NY, CT	Boundary Bound CT MA NY	420259.40	733117.20	625149	4656170	18T	Ashley Falls (MA)*
36	VT, NY, MA	Boundary Bound MA NY VT	424444.90	731552.40	641940	4733790	18T	Berlin (NY)*
37	VT, NH, MA	P60 m	424335.9	722729.7	708060	4733380	18T	Northfield (MA)*
38	CT, MA, RI	Tri State	420028.70	714757.21	268154	4654254	19T	Webster (MA)*