in cooperation with Captain John Pitcher, Acting Park Superintendent, he began a series of projects to improve the quality of life at the fort. Chittenden had a reservoir built in 1901 to provide a consistent supply of water for irrigation, human consumption and fire fighting. The engineers oversaw a project during 1901 which cleared, manured and seeded the area immediately in front of officers' row to create a grassy parade ground and seeded areas around the various buildings to reduce perennially dusty summer conditions. Fort Yellowstone transitioned from oil to electric lighting in 1902 after Chittenden completed a 100-kilowatt powerplant east of the fort. The powerplant and reservoir no longer exist, but most of the grassy areas around Fort Yellowstone that Chittenden planned remain. In 1903, Captain Chittenden oversaw the design and construction of the second stone building in Yellowstone, the engineers headquarters (Bldg 39), often called the "Pagoda" because of its design. This structure is in a prominent but isolated location just north of the fort. In 1918, after the National Park Service began administration of the park, the engineer's headquarters building became the first official park headquarters. Another prominent Yellowstone landmark, the Roosevelt Arch, was constructed in 1903 under the supervision of Chittenden. A north entrance station and gate near Gardiner, Montana, was first suggested by Captains Wilber Wilder and Oscar Brown in 1899. However it was not until 1903 that Chittenden and then-Acting Superintendent Major John Pitcher were able to gain approval for the arch. The ground breaking for the arch coincided with the two-week vacation visit of U.S. President Theodore Roosevelt to the park. Roosevelt was the only U.S. President to visit Yellowstone during the army era. On his last day in the park, April 24, 1903, Roosevelt participated in the cornerstone laying ceremony and the arch was completed later that year. In 1904, Major John Pitcher recommended the construction of several new buildings to accommodate the growing contingent of soldiers. The only structure approved was the new post exchange located just south of the double cavalry barracks. This striking Colonial Revival styled structure was completed in 1905, replacing a much smaller post exchange that had been built in 1894. It now functions as the National Park Service canteen. Later construction period 1908–1913 The second wave of major construction started in 1908 when the largest structures in the fort were built, including the three-story double cavalry