The boundary between the Gouvernement Oostkust van Sumatra and the Gouvernement Atjeh en Onderhoorigheden was the northern territorial limit of the East Coast government, fixed by Staatsblad [[1908 No. 604]] and running from the watershed between the Besitang River and the Tamiang River to the Wilhelmina-keten (Gunung Bandahara) and onward along the mountain crest to the Serbolangit group (Liang Gergas), separating the Oostkust government from the Atjeh government. The boundary definition resolved decades of administrative ambiguity dating to when the region was part of Residentie Riouw en Onderhoorigheden and formally transferred the Tamiang region to Aceh via Staatsblad 1908 No. 112 of 1908.
Historical context
Until the second half of the nineteenth century, the territory now comprising the Gouvernement Oostkust van Sumatra was considered a “worthless wilderness” and administered as part of Residentie Riouw en Onderhoorigheden. The rapid development of European tobacco cultivation from the 1860s onward necessitated more intensive administration, leading to the creation of a separate gewest in 1878 under a Resident at Bengkalis, with the capital moving to Medan in 1887. As the cultivation area expanded northward, the need for a precise northern boundary with Atjeh became acute.
The 1908 boundary settlement
The boundary was formally established by Staatsblad [[1908 No. 604]], the only gewest boundary in the region to be precisely demarcated by legal instrument. According to the Encyclopaedisch Bureau’s composite map (Bijlage XXIII), the line runs:
- From the north, following the watershed between the Besitang and Tamiang rivers to the Wilhelmina-keten (Gunung Bandahara, 3,030 m).
- Along the crest of the Wilhelmina-keten to the Serbolangit group (Liang Gergas, 1,888 m).
- From Liang Gergas descending through the marshy valley of the Lau Penjabrangan, crossing its middle course.
- Continuing south along the eastern fringe of the Blang Nodi to Gunung Aboe Aboe (1,684 m), the tripoint where Atjeh, Oostkust, and Tapanoeli boundaries meet.
The Topografische Dienst proposed an alternative natural boundary from Liang Gergas down a right-bank tributary of the Lau Penjabrangan, then along the Lau Penjabrangan to its confluence with the Lau Alas, thence south along the Gunung Sembala (eastern rim of the Alas valley) to the Lau Bencen, and westward along the crest of the Deleng Madjid (Ranto Besiketen) to the source of the Lau Boekit, following it to the Lau Renoen near Kota Rimbara, then east along the Wilhelmina-keten crest to Gunung Simpang Pajong, over Deleng Bishat to Gunung Siboentan, rejoining the old line. Both lines appear on the Gewestelijke kaart van Atjeh (Bijlage XI, afl. II) and the Oostkust map.
Transfer of Tamiang
Staatsblad 1908 No. 112 separated the Tamiang region — the original northernmost portion of the Oostkust gewest — and attached it to Atjeh as the onderafdeeling Tamiang. This reduced the Oostkust’s northern extent to the Besitang watershed. The transfer reflected the practical difficulty of administering Tamiang from Medan and its closer geographic and cultural ties to Aceh — a point already acknowledged in the 1878 Langkat–Tamiang transfer, by which the Sultan of Langkat had ceded his rights over the Tamiang landschapjes to the Netherlands-Indies Government. For three decades after that cession Tamiang remained attached to the Oostkust; only in 1908, under the pressure of continued military action against Atjehnese freebooters, was it formally incorporated into the indirect bestuurd gebied of the Gouvernement Atjeh en Onderhoorigheden.
Administrative significance
The boundary fixed the jurisdiction of the assistent-resident of Langkat (hoofdplaats Tandjoeng Poera), whose onderafdeeling Beneden-Langkat bordered Atjeh. The Atjeh-tram (narrow gauge) terminated at Pangkalan Soesoe near the boundary, while the Deli-tram (standard gauge) reached Pangkalan Brandan and Bookit Koeboe; the missing link between Pangkalan Brandan and Besitang remained the final gap in overland connection between the two colonial railway systems. The Aroebaai harbor development was explicitly tied to Atjeh-tram completion, and was eventually abandoned in favour of Belawan after the 1910 Kraus-de Jongh report.
Significance
The boundary is, in the Encyclopaedisch Bureau’s account, the only precisely demarcated boundary of the Oostkust gewest — the legal instrument that closed the long process of administrative detachment of the Tamiang region from the Oostkust and its incorporation into Atjeh. The boundary’s coincidence with the Wilhelmina-keten crest and the Besitang–Tamiang watershed reflects the colonial state’s preference for “natural” landscape boundaries — a preference that the Topografische Dienst’s alternative proposal would have carried even further by following the Lau Penjabrangan and Lau Alas valleys.
See Also
- Gouvernement Oostkust van Sumatra
- Gouvernement Atjeh en Onderhoorigheden
- Staatsblad 1908 No. 604
- Staatsblad 1908 No. 112
- 1878 Langkat–Tamiang transfer
- Tamiang
- Wilhelmina-gebergte
- Besitang
- Pangkalan Soesoe
- Pangkalan Brandan
- Bookit Koeboe
- Aroebai
- Atjeh-tram
- Deli Spoorweg Maatschappij
- 1908
- 1878
- 1887
Source
De Buitenbezittingen, Deel II, Afl. 3: Oostkust van Sumatra. Eerste Stuk, bewerkt door het Encyclopaedisch Bureau, Mededeelingen van het Bureau voor de Bestuurszaken der Buitenbezittingen (Weltevreden: Landsdrukkerij, 1918), pp. 1–4, 11–12, 229 (Bijlage I), 230–231 (Bijlage XXIII). Universiteitsbibliotheek Vrije Universiteit Amsterdam, shelfmark LS.08781.