Leahi | Page 2 | Images of Old Hawaiʻi

July 18, 2019 by Peter T Young 1 Comment

Lēʻahi

Lēʻahi, also known as Diamond Head, is a nearly circular crater of approximately two-thirds of a mile in diameter.

Diamond Head is different things to different people:
• Homes of Hawai‘i’s Kings, Queens and Royal Families were in its shadow
• It’s an internationally-recognized visitor industry icon
• It’s the backdrop to the famous Waikīkī Beach
• It served an integral role in the island military defenses
• It is present home and command center for State Civil Defense
• It’s an easy walk to the summit for spectacular views of the ocean and coastline
• It is a backdrop to a transformation of social, political and religious events

Diamond Head was given its name by British sailors who found natural calcite crystals on the slopes of the mountain and mistook them for diamonds. Hawaiians called the volcanic cone Lēʻahi, Laeʻahi or Lae-ahi. Translations include: “brow of the ʻahi” and “cape of fire.”

In the legend of Pele and Hi‘iaka, Hi‘iaka is said to have compared Diamond Head to the brow of the ‘ahi: Me he i‘a la ka Lae o Ahi; E kalali au ae nei i ke kai – Like a fish is the Brow-of-the-ahi Resting high above the sea.

Other names for Diamond Head include Point Rose (given to the geologic feature in 1786 by Captain Nathaniel Portlock in honor of the secretary of the British treasury), Diamond Hill and Conical Mountain.

Geologically speaking, Diamond Head is a dormant volcanic tuff cone, with a variable-height rim surrounding the recessed interior area; the eruption of Diamond Head took place well over 150,000-years ago.

The highest point (at 761-feet) on the southwest rim of Diamond Head is known as Lēʻahi Summit (most of the rim is between 400-500-feet.) The crater is on the southern coastline of Oʻahu, approximately one-and-a-half miles south of the Koʻolau range.

From at least the 15th century, chiefly residences lined the shore of Waikīkī, and cultivated fields spread across the Waikīkī plain to the foot of the crater and inland to the Ko‘olau valleys. There were several heiau in Waikīkī, of which several were located around Diamond Head.

One of Kamehameha’s main heiau (also suggested as a surfing heiau,) Papaʻenaʻena (also called Lēʻahi Heiau,) was situated at the base of the southern slopes.

Other heiau in the vicinity include Kupalaha Heiau, which may have been connected with Papaʻenaʻena, Pahu-a-Maui Heiau on the crater’s eastern cliffs overlooking the ocean (the site of the present Diamond Head lighthouse), Kapua Heiau near the present Kapiʻolani Park, and Ahi Heiau on the peak of Diamond Head.

In the early years of the 19th century, people tended gardens in the crater and one visitor described finding “an abundance of melons and watermelons growing wild, upon which we feasted”.

In 1831, the botanist, Dr. FJF Meyen, noted the crater contained a small pool of water “which was completely covered with plants”. (The crater pond was filled-in by military bulldozing; now, there is a seasonally-moist wetland where standing water can occasionally be seen.)

Some have suggested there is little likelihood for archaeological sites of pre-contact Hawaiian or early post-contact origin in the crater. The archival research suggests that the only Hawaiian activity that might have taken place in the crater was dryland farming (dating to 1822.)

In the Great Māhele division of lands between the king and his high chiefs, Diamond Head, which lies within the ¬ʻili of Kapahulu in the ahupua¬ʻa of Waikīkī, was awarded to William C. Lunalilo, the future king of Hawaiʻi (1873-1874).

In the early 1860s, Mark Twain commented, “On the seventh day out we saw a dim vast bulk standing up out of the wastes of the Pacific and knew that that spectral promontory was Diamond Head, a piece of this world which I had not seen before for twenty-nine years.”

“So we were nearing Honolulu, the capital city of the Sandwich Islands – those islands which to me were Paradise; a Paradise which I had been longing all those years to see again. Not any other thing in the world could have stirred me as the sight of that great rock did.”

In 1884, the Kapahulu portion of Lunalilo’s Māhele award was subdivided by the Lunalilo Estate. Diamond Head was transferred from the estate to the Hawaiian Government.

The summit of Lēʻahi affords an excellent and unobstructed view of the ocean from Koko Head in the east, to beyond the ʻEwa Plain to Wai‘anae in the west. The utility of Diamond Head did not go unnoticed by the U.S. Army.

In 1906, the US government acquired the 729-acres of Lunalilo’s property from the Hawaiian Government, as well as other adjacent lands (including Black Point), to create Fort Ruger Military Reservation, the easternmost of the coastal defense forts.

From 1963 to 2001, the FAA had its air traffic control facilities in Diamond Head crater, which guided Hawai‘i-bound aircraft from 250 miles outside the Islands to within 20 miles of their intended airport.

Diamond Head State Monument was first officially established under an Executive Order by Hawaiʻi’s Governor Quinn in 1962; nearly 500-acres of land now make up the Monument.

This early designation covered about 145-acres in a horseshoe configuration preserving the famous profile and the south and west exterior slopes from the crater rim down to Diamond Head Road. Subsequently, Executive Orders have added additional lands to the Monument.

The interior of the crater had been closed to the public from 1906 until 1968. (Remember the Sunshine Festivals back then?) In 1976, DLNR’s Division of State Parks became the agency responsible for the planning and management of the Monument – it is now open every day.

Two major tunnels (Kāhala Tunnel and Kapahulu Tunnel) provide pedestrian and vehicular access into the crater.

Two separate trail systems (interior and exterior) address different needs and purposes. The exterior trail system has a dual function as a jogging and bicycle path traversing the mauka end of the Monument and along the existing trail on the lower ʻEwa-makai slopes. The interior trail system leads to the summit of Lē¬ʻahi (1.6-mile round trip.)

Diamond Head is open daily 6 am to 6 pm, every day of the year including holidays, with entrance Fees of $5.00 per car or $1 per person for pedestrians (the money goes to State Parks.) Mountain Biking is not allowed on this trail. No dogs allowed in Diamond Head State Monument.

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Overlooking Waikiki-1929

Waikiki-Diamond_Head-1940

1935 Chevrolet convertible with Diamond Head and Waikiki Beach in the background

Waikiki_Beach-Boats-1935

Waikiki with Diamond Head in the background-hawaii-gov-1934

Joseph_Dwight_Strong_-_’View_of_Diamond_Head’,_oil_on_canvas-1880s

Joseph_Dwight_Strong_-_’Hawaiians_at_Rest,_Waikiki’,_oil_on_canvas,_c._1884

From_Mccully_to_Diamond_Head-1900

Diamond_Head-LOC-aep-his180

‘Diamond_Head_from_Waikiki’,_oil_on_canvas_painting_by_Enoch_Wood_Perry,_Jr.,_c._1865

Diamond Head & Honolulu from the Punchbowl-(vic&becky)-1953

Automobile with Diamond Head and Waikiki in background, 1933

Alexander_Scott_-_Diamond_Head_from_Tantalus’,_oil_on_canvas,_c.1906-8

Clipper plane passes Diamond Head-1935

Diamond_Head_Lighthouse-Transpac_Finish

May 28, 2019 by Peter T Young 2 Comments

Fort Ruger

In January 1905, President Teddy Roosevelt instructed Secretary of War William H. Taft to convene the National Coast Defense Board (Taft Board) “to consider and report upon the coast defenses of the United States and the insular possessions (including Hawai‘i.)”

In 1906 the Taft Board recommended a system of Coast Artillery batteries to protect Pearl Harbor and Honolulu.

Between 1909-1921, the Hawaiian Coast Artillery Command had its headquarters at Fort Ruger and defenses included artillery regiments stationed at Fort Armstrong, Fort Barrette, Fort DeRussy, Diamond Head, Fort Kamehameha, Kuwa‘aohe Military Reservation (Fort Hase – later known as Marine Corps Base Hawaiʻi) and Fort Weaver.

The forts and battery emplacements batteries were dispersed for concealment and to insure that a projectile striking one would not thereby endanger a neighbor.

Fort Ruger Military Reservation was established at Diamond Head (Lēʻahi) in 1906. The Reservation was named in honor of Major General Thomas H. Ruger, who served from 1871 to 1876 as the superintendent of the United States Military Academy at West Point.

The fort included Battery Harlow (1910-1943); Battery Birkhimer (1916-1943); Battery Granger Adams (1935-1946); Battery Dodge (1915-1925); Battery Mills (1916-1925); Battery 407 (1944); Battery Hulings (1915-1925); and Battery Ruger (1937-1943).

According to the specifications called for by the Taft Board and subsequent updates, various guns and mortars were included at the various Batteries. These included 12″ Mortars, 8” on railway barbette carriages and other gun emplacements.

A network of tunnels was carved into the mountain and cannon emplacements were placed atop the crater rim along with observation posts and bunkers.

The fortifications within the Fort are all made of reinforced concrete and vary in size from the massive Battery Harlow and the four-story fire control station at the top of Leahi, to a dozen more modest six pound gun emplacements along the rim of the crater.

Battery Harlow is a massive reinforced concrete structure imbedded into the rear of Diamond Head. Built in 1910, it has three large bunkers which are separated by “courtyards” that served as platforms from which eight 12-inch mortars were fired.

Batteries Hulings and Dodge were completed in October 1915. These reinforced concrete structures tunnel through the wall of the crater and each contains one small room. The gun platforms with 4.7 inch guns are on the exterior wall of the crater.

Also dating from 1915 are a dozen 6 pound gun emplacements which are located along the rim of the crater. These are simple concrete slabs with eye rings which helped keep the weapons in place. These were installed to protect the batteries against ground attack.

Battery Birkhimer is located on the floor of the crater, near the rear. It also is made of reinforced concrete and primarily lies beneath the ground. Only its concrete portals are visible from the surface. Completed in 1916, this battery originally was armed with four 12-inch mortars.

Battery 407 was started in 1943 and completed near the end of World War II. Located on the front of Diamond Head, it has tunnels which go through the walls of the crater; it was armed with two 8-inch guns.

Battery Mills existed from 1916 to 1925 on the Kupikipikio Point Reservation on the lava point now known as Black Point and has long since been removed.

Battery Granger Adams (which replaced Battery Mills) was built there between 1933 and 1935, then decommissioned in 1946. Roads and houses now cover this area.

The four-story fire control tower located at the top of Leahi was built between 1908-1910. It is reached by a trail which terminates at the 560 foot elevation, then up a concrete stairway to a 225 foot long tunnel, finally a long concrete staircase of 99 steps leads to another tunnel which opens out on the south face of Diamond Head (with four levels of fire control stations.)

From this elaborate fire control station all the guns along the leeward coast could be commanded. The lowest level was for Battery Randolph at Fort DeRussy.

The next station above served both Randolph and Dudley at DeRussy. The third level commanded Battery Harlow at Fort Ruger and the top level was the battle commander’s station.

From this vantage point, 761 feet above sea level, the battle commander could view the coast from Koko Head to Waianae.

The conclusion of World War II and the advent of nuclear and missile warfare made the coastal batteries obsolete. Thus in December 1955 the majority of the land was turned over to the State of Hawai‘i.

Currently, Fort Ruger is down-scaled and part of the Diamond Head State Monument Park and is utilized for training and various administrative purposes by the Hawaii Army National Guard. Additionally, the installation is the presently home of the Joint Force Headquarters-Hawai‘i.

Battery Birkhimer has been recycled and presently serves as office space for the State Department of Defense. The other Batteries are generally used for storage.

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FortRuger-1932

Encampment of the 3rd Balloon Company at Fort Ruger on back side of Diamond Head.

Fort_tRuger-stone-art-planter

Mortar Courtyard Battery Harlow-(NPS)-1982

Fort_Ruger-Battery_Harlow-(NPS)-1982

Battery_Harlow

Battery_Birkhimer-CD_Use-1950s

Battery_Birkhimer_entrance

FtRuger-DiamondHead-Tunnel

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Fort Ruger, Kaimuki, Oahu-Wilhelmina Rise in background-(HSA)-PPWD-11-7-023-1914

Diamond_Head-Fort_Ruger-1934

Diamond_Head-Fire_Control-Batteries_Cross_Section-1910

Leahi Summit-Fire Control-(NPS)-1982

Battery_Granger_Adams-1938

Battery_Dodge-Entrance-(NPS)-1982

Battery 407-(NPS)-1982

12-inch-Mortars-(not Fort Ruger)

12-inch-Mortar-(not Fort Ruger)

Oahu-Forts-Map

May 25, 2017 by Peter T Young 1 Comment

Aqua Marine

The area along the coast at the foot of Leahi (Diamond Head) between Waikiki and Kupikipiki (commonly called Black Point) is an area known as Kaluahole (‘the āhole fish cavern.’) Kaluahole is a noted place in several legends associated with the area.

In one story of Aiai, son of Kūulakai (a god who controlled all the gods of the sea,) following his father’s instructions “… traveled about the islands establishing fishing stations (ko‘a) at fishing grounds (ko‘a aina) …”

“… where fish were accustomed to feed and setting up altars (ku‘ula) upon which to lay, as offerings to the fishing gods, two fish from the first catch one for the male, the other for the female aumakua. Some accounts give Aiai a son named Puniaiki who is a fish kupua and trickster and helps his father set up fishing stations.”

“On Oahu, Aiai lands at Makapu‘u and makes the stone Malei the fish stone for the uhu fish of that place. Other stones are set up at grounds for different kinds of fish. The uhu is the common fish as far as Hanauma.”

“At Ka-lua-hole the ahole fish run. The fish still spawn about a round sandstone (called Ponahakeone) which Aiai placed outside Kahuahui …” (Beckwith)

Ponahakeone is offshore of Kaluahole … “In 1834, during the time of Kaomi, a malihini shark came to Waikiki in search of food. When he reached Kaʻalawai and Kaluaahole, he was refused by the guardian sharks of that place (ka poʻe kamaʻaina kiaʻi o ia wahi)…”

“… and then he came to Kapua, where the guardians of Waikiki were, and argued with them. They decided to kill him and to leave visible proof of it, so they forced his head into a cleft in the rocks at Kukaʻiunahi, makai of Kupalaha.” (Kamakau; Maly)

This is where Sanford B Dole had a beach bungalow – he called it Aqua Marine. (It’s about where the Le‘ahi Beach Park is situated.)

A portion of Royal Patent Grant 3219 was deeded in June 1879 to Kahololio. The grant consisted of all the land at Kaluahole and comprised 19 acres. In 1889 Kahololio sold +/- 15 acres of the grant lands to Sanford B. Dole.

Between 1892 and 1912, Dole deeded various parcels to George Beckley which eventually were subdivided into various lots and identified as portions of an estate known as “Aqua Marine” and the “Beckley Tract”. (Dye)

“Where the road leaves Kapiolani Park on the east, it passes a few houses and then comes out on an open space skirting the ocean. This is low and level at first, but further on rises to higher ground, whence the views seaward, south and west, are genuine Vistas of Hawaii.”

“The lapis-lazuli of the deep sea, starred with the sails of passing vessels, breaks into turbulent foam where it meets the outer reef, and ‘sliding its snow-white and swift avalanches’ into the inner lagoon …”

“… the waters, taking their tone from the corals below and the skies above, now break forth into an extravaganza of color as they hasten in subdued merriment to the shore of yellow sand.”

“‘In stillness far away, like phantoms, rise the bills of Waianae,’ while the bald-headed summit of Diamond Head looms up behind, almost over you, with startling distinct ness, but with a benignant and fatherly expression withal.”

“Besides this ideal environment, Aqua-Marine enjoys some substantial advantages as well. This strip of land between the road and the shore is divided into ten large lots, varying in size from half to three-quarters of an acre, each one fronting makai on the sea and mauka on the road for from 100 to 150 feet.”

“Government water is laid on along the fronts of these lots on the road. The sea-bathing is not very good as regards the footing on account of the coral, but can be improved by dynamite; as regards the sea-water it is first-class.”

“The trade winds are not shut out by Diamond Head, but, sweeping around the south east side of the bluff, blow freshly across these lots from the sea, the wind being perceptibly cooled by its passage over the water and carrying with it the tonic quality of the salt spray.”

“The reef is a famous fishing ground, and the fish are free to those who can circumvent them. Shellfish are abundant and ambrosial.”

“The road skirting these lots is being extended by the Park Association, and further on has been carried high up along the face of the bluff, giving a wide and beautiful outlook. It is to be continued around Diamond Head returning to the Park on its mauka side and when finished will be one of the most picturesque drives near Honolulu, abounding in a great variety of delicious views.”

“The tramway is to be extended through the Park, which will bring it within a live minutes’ walk from Aqua Marine. If the Oahu Railroad is extended in this direction according to its preliminary surveys, it will come within a few rods of these lots, which would bring them within fifteen minutes of Honolulu.” (Pacific Commercial Advertiser, February 5, 1892)

“‘Aqua Marine’ at Diamond Head is one of the prettiest places on the Island. Situated on high ground, one is enabled to command a magnificent view of the picturesque landscape and the lighthouse in the distance only adds fresh beauty to an entrancing spot.”

“The Doles are thinking of living at their bungalow all the year round, for the sea air agrees so well with the Judge’s health. The Emma street house is large and comfortable, but little ‘Aqua Marine’ is always occupied the greater part of the year.”

“If the family conclude to live there permanently many changes will be made to the home. The grounds are rapidly being improved and the large trees already planted by Judge Dole are making a fine showing.” (Evening Bulletin, January 14, 1905)

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Sanford Dole beach house at Kaluahole, Diamond Head-1905

Downtown_Honolulu-Map-1892-portion

Honolulu_Harbor_to_Diamond_Head-Wall-Reg1690 (1893) – Waikiki_portion-portion

Honolulu_Harbor-Diamond_Head-Monsarrat-Reg1910 (1897)-portion

February 5, 2016 by Peter T Young 1 Comment

Possibly the Last Human Sacrifice

“In 1804 when Kamehameha was on his way from Hawaiʻi to invade Kauai he halted at Oahu with an army of eight thousand men at Oʻahu.”

“The yellow fever broke out among the troops, and in the course of a few days swept away more than two thirds of them. During the plague, the king repaired to the great marae (heiau) at Wytiti, to conciliate the god, whom he supposed to be angry.”

“The priests recommended a ten days’ tabu, the sacrifice of three human victims, four hundred hogs, as many cocoa-nuts, and an equal number of branches of plantains.”

“Three men, who had been guilty of the enormous turpitude of eating cocoanuts with the old queen, were accordingly seized and led to the marae.”

“But there being yet three days before the offerings could be duly presented, the eyes of the victims were scooped out, the bones of their arms and legs were broken, and they were then deposited in a house, to await the coup de grace on the day of sacrifice.”

“While these maimed and miserable creatures were in the height of their suffering, some persons, moved by curiosity, visited them in prison, and found them neither raving nor desponding, but sullenly singing the national huru (anthem) – dull as the drone of a bagpipe, and hardly more variable – as though they were insensible of the past, and indifferent to the future.”

“When the slaughtering time arrived, one of them was placed under the legs of the idol, and the other two were laid, with the hogs and fruit, upon the altar-frame. They were then beaten with clubs upon the shoulders till they died of the blows.”

“This was told us by an eye-witness of the murderous spectacle. And thus men kill one another, and think that they do God service.” (Journal of Tyerman And Bennet, 1832)

But that wasn’t the last …

“Kaʻahumanu was a woman of the chiefly stature and of celebrated beauty … her husband (Kamehameha) cherished her exceedingly. He had the indelicacy to frame and publish an especial law declaring death against the man who should approach her, and yet no penalty against herself.”

“And in 1809, after thirty-four years of marriage, and when she must have been nearing fifty … Kanihonui, was found to be her lover, and paid the penalty of life”. (Stevenson)

Kanihonui was a handsome 19-year old. Reportedly, Kaʻahumanu had seduced the boy while she was intoxicated; in addition, the boy was the son of Kamehameha’s half-sister – and, Kamehameha and Kaʻahumanu raised him.

Kanihonui was put to death at Papaʻenaʻena Heiau on Leʻahi (Diamond Head) for committing adultery with Kaʻahumanu.

“After the death of Kanihonui the mind of Kaʻahumanu dwelt thereon; she could not readily dismiss the thought. This event was preceded by the death of Keʻeaumoku, the father of this chiefess, by the plague; therefore she was sent to a disconcerting place, but to no purpose.” (Thrum)

“She sought to recover from her anger but was unable to do so; and she considered … taking the kingdom from the king by force and giving it to the young chief, Liholiho.”

“Before she laid her plans for the war, a holiday for the purpose of surfing at Kapua in Waikiki was proclaimed, because the surf was rolling fine then.”

“It was where one could look up directly to the heiau on Leʻahi, where the remains of Kanihonui were, all prepared in the customary manner of that time.”

“It was said that only Kaleiheana, who was a Luluka, watched over the corpse from the time of death until it was decomposed.”

“The chiefess had heard something about her lover’s remains being there, and perhaps that was why the proclamation was made.”

“On the appointed day, chiefs, chiefesses, prominent people, and the young chief Liholiho went to Kapua. When all had assembled there, the king gathered his men together in readiness for trouble.”

“He sent a messenger, Kinopu, after Kaahumanu’s followers to find out what they were planning. It is said that three things were done at Kapua: surfing, lamenting, and more surfing; and it is said that they had intoxicants with them.”

“Thus they whiled away the time until evening.” (John Papa Ii)

“And thus it was the young prince was before them and the chiefs at the time when Kalanimōku asked him, whilst the chiefs were assembled together: ‘What think you? Let us take the government from your father, and you be the king, and your father be put to death?’”

“When the child heard these words he bent forward and thought deeply of the question’s meaning. Straightening himself up and looking at the assembly, he replied: ‘I do not want my father put to death.’”

“By this answer all the chiefs who were gathered together at that time were greatly gratified.” (Kuokoa, August 4, 1869; Thrum)

George W. Bates, in 1854, describes a heiau at the foot of Leʻahi (believed to be Papaʻenaʻena) as: “Just beyond Waikiki stand the remains of an ancient heiau, or pagan temple. It is a huge structure, nearly quadrangular, and is composed merely of a heavy wall of loose lava stones, resembling the sort of inclosure commonly called a ‘cattlepen.’”

“This heiau was placed at the very foot of Diamond crater, and can be seen at some distance from the sea. Its dimensions externally are 130 by 70 feet. The walls I found to be from six to eight feet high, eight feet thick at the base, and four at the top.”

“On climbing the broken wall near the ocean, and by carefully looking over the interior, I discovered the remains of three altars located at the western extremity, and closely resembling parallelograms. I searched for the remains of human victims once immolated on these altars, but found none; for they had returned to their primitive dust, or been carried away by curious visitors.”

Later (at about 1856,) Queen Emma ordered her workers to take rocks from Papaʻenaʻena heiau to build a stone wall around her property at Waikīkī.

“After the death of Kanihonui at Waikiki … Kamehameha … moved to Honolulu from Waikiki.” (Laʻanui, Kumu Hawaiʻi, 1839; Thrum)

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Reconstruction-illustration-Papaenaena_Heiau-(NPS)

Waikiki-Kaneloa-(Before Kapiolani_Park)-Lyons-Reg0306 (1876) (portion)-noting_Papaenaena

Waikiki-Bishop-Reg944 (1882)-noting_Papaenaena_heiau

Waikiki-Diamond_Head-USGS-UH_Manoa-2420-1952-noting_La_Pietra-Papaenaena

January 8, 2016 by Peter T Young 2 Comments

Mule Tunnel

With its panoramic view from Koko Head to Waiʻanae, the summit of Diamond Head was an ideal site for the coastal defense of O‘ahu. In 1904, Diamond Head was purchased by the Federal government and designated for military use.

In 1906, Secretary of War William H Taft convened the National Coast Defense Board (Taft Board) “to consider and report upon the coast defenses of the United States and the insular possessions (including Hawai‘i.)” They recommended a system of Coast Artillery batteries to protect Pearl Harbor and Honolulu.

Fortification of Diamond Head began in 1908 with the construction of gun emplacements and an entry tunnel through the north wall of the crater from Fort Ruger known as the Mule Tunnel.

Originally, the tunnel was 5-feet wide and 7-feet high which is what was required for mules. Mules were used primarily to pull narrow gauge rail cars loaded with material in and out of the crater and to the various construction points.

Fort Ruger Military Reservation was established at Diamond Head (Leʻahi) in 1906. The Reservation was named in honor of Major General Thomas H. Ruger, who served from 1871 to 1876 as the superintendent of the United States Military Academy at West Point.

The trail to the Diamond Head summit was built in 1908 as part of the US Army Coastal Artillery defense system. Entering the crater from Fort Ruger, through the Mule Tunnel, the trail scaled the steep interior western slopes of the crater to the summit.

The dirt trail with numerous switchbacks was designed for mule and foot traffic. The mules hauled materials on this trail for the construction of Fire Control Station Diamond Head located at the summit. Other materials were hoisted from the crater floor by a winch and cable to a midway point along the trail. (DLNR)

In about 1910, there was a narrow gauge railway running from the mule tunnel across the center of the crater

The forts and battery emplacements were dispersed for concealment and to insure that a projectile striking one would not thereby endanger a neighbor.

The fort included Battery Harlow (1910-1943 – northern exterior;) Battery Hulings (1915-1925- (tunnels through crater wall;) Battery Dodge (1915-1925 – tunnels through east crater wall;) Battery Mills (1916-1925 – on Black Point;) Battery Birkhimer (1916-1943 – mostly below ground inside the crater;) Battery Granger Adams (1935-1946 – on Black Point (replaced Battery Mills;)) Battery 407 (1944 – tunnels through south crater wall;) and Battery Ruger (1937-1943).

In 1922, Mule Tunnel was enlarged to 15 feet wide by 14 feet high. A Fire Control Switchboard that had been in a shed outside the tunnel was moved into a room carved into the wall about 100 feet from the outside end. (Its name later changed to the Kapahulu Tunnel.)

The headquarters of the Harbor Defenses of Honolulu came to Fort Ruger in January 1927. In 1932 work began on a bombproof Harbor Defense Command Post (HDCP or “H” Station) built into the Kapahulu Tunnel.

During the widening of the tunnel, a larger cavern was cut into the wall of the tunnel at the downhill end, creating rooms for a Harbor Defense Command Post.

The new complex of eight rooms included the old fire control switchboard room and became the Harbor Defense Command Post. (Those rooms are now used by the Hawaii Red Cross as storage.)

In 1932 the tunnel was enlarged again, to 17 feet high to allow truck traffic. During the widening a larger cavern was cut into the wall of the tunnel at the downhill end, creating rooms for a Harbor Defense Command Post.

The Kahala Tunnel was built in the 1940s and is the public entrance today. (The Kapahulu Tunnel is used only when the Kahala Tunnel is closed for repairs or problems.)

In January 1950 Fort Ruger became the headquarters of the Hawaii National Guard. In 1955 most of the Fort Ruger reservation was turned over to Hawaii with the U.S. Army retaining the parade and Palm Circle until 1974 and the Cannon Club (officers’ club) until 1997.

The fort’s barracks area became the University of Hawaii’s Kapiʻolani Community College. (Lots of information is from DiamondHeadHike.)

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