Last updated: January 10, 2022
Bubble Pond Bridge (1928) was the tenth of 17 bridges constructed along 57 miles of carriage road on Mount Desert Island between 1917 and 1940. It carries the Bubble Pond Carriage Road over a portion of the Jordan Pond/Eagle Lake motor road that was abandoned when that road was realigned in 1962-1964 to avoid a sharp curve. This bridge is now a relic with no function. Access to a parking lot along the shore of Bubble Pond remains.
The simple rustic masonry arch bridge is constructed of unreinforced concrete clad with rough-dressed random-laid rubblestone. It is 75-feet long, 20-feet at highest, with an elliptical arch that spans 31-feet with rough-dressed radiating voussoirs. Keystones on both sides are inscribed with the 1928 construction date. Arched parapet walls are flanked by stepped wingwalls that have large projecting stone scuppers and which terminate in squared endposts.
Beatrix Farrand would later make plantings recommendations to fill the spaces around the bridge as thickly as the ledge permitted. She suggested maples, oaks, birches, as well as dewberry, clematis, and sumac.
As John D. Rockefeller, Jr. went about planning and funding Acadia's carriage road network, he determined that the 'Bubble Pond-Triad' carriage road should cross the new 'mountain' motor road he was also funding and designing, necessitating a bridge. He turned to New York architect William Welles Bosworth, who responded with a formal multi-centered arch bridge with open balustrade and finely-cut voussoirs. Although Mr. Rockefeller accepted the design, the NPS Assistant Director Arno Cammerer objected to it as being too formal for a national park. Bosworth prepared a second design, eliminating the open balustrade but retaining the carefully cut stone and formal voussoirs. This design was again rejected as being too 'citified.'
The National Park Service then designed a more 'rustic structure' of roughly-quarried stone, making it possibly the only carriage road bridge of solid masonry construction. Although disappointed, Mr.. Rockefeller agreed to fund the construction of this design. His engineer, Paul D. Simpson, prepared the working drawings, and the bridge was constructed in 1928 by Philadelphia mason Pringle Borthwick.
Daraja la Bubble Pond (1928) lilikuwa daraja la kumi kati ya daraja 17 zilizojengwa kwenye barabara ya 57 ya gari kwenye Kisiwa cha Mount Desert kati ya 1917 na 1940. Barabara ya Bubble Pond Carriage Road ni barabara ya Jordan Pond-Eagle Lake ambayo iliachwa wakati barabara hiyo ilipofanywa upya mnamo 1962 ili kuepuka curve kali. Sasa daraja hilo ni mabaki yasiyo na matumizi yoyote. Upatikanaji wa mahali pa kuegesha magari kando ya pwani ya Bubble Pond bado. Daraja rahisi la masonry arch linajengwa kwa saruji isiyoimarishwa iliyofunikwa na mawe ya mawe ya mawe ya mawe ya mawe. Ina urefu wa mita 75 na urefu wa mita 20 juu ya urefu wa elliptical arch, ambayo ina urefu wa mita 31 na voussoirs ya radiating. Mawe ya msingi upande wa pili yana tarehe ya ujenzi ya 1928. Kuta za parapet zenye upinde zimezungukwa na kuta za mrengo zenye ngazi ambazo zina scuppers kubwa za mawe zinazojitokeza na ambazo zinaishia katika nguzo za mwisho za mraba. Baadaye, Beatrix Farrand alipendekeza kwamba mimea hiyo ichangiwe karibu na daraja hilo kwa kadiri ilivyoruhusiwa na mwinuko. Alipendekeza miti ya maple, oak, birch, na pia dewberry, clematis, na sumac. John D. Rockefeller Jr. aliamua kwamba barabara ya 'Bubble Pond-Triad' inapaswa kuvuka barabara mpya ya'mlima' ambayo alikuwa pia akifadhili na kubuni, ikihitaji daraja. Mhandisi wa New York, William Welles Bosworth, alibuni daraja lenye matao mengi, na lilijengwa kwa kutumia mbao za mviringo. Ingawa Rockefeller alikubali muundo huo, Naibu Mkurugenzi wa NPS Arno Cammerer alipinga kuwa ni rasmi sana kwa mbuga ya kitaifa. Bosworth alitayarisha muundo wa pili, akiondoa balustrade iliyofunguliwa lakini akahifadhi jiwe lililokatwa kwa uangalifu na voussoirs rasmi. Muundo huu ulikataliwa tena kwa kuwa 'ulikadiriwa' sana. Kisha Huduma ya Hifadhi ya Kitaifa ikabuni'muundo wa kijijini' zaidi wa mawe yaliyochimbwa kwa ukali, na kuifanya iwe labda daraja pekee la barabara ya gari la ujenzi thabiti wa mawe. Ingawa alivunjika moyo, Bw. Rockefeller alikubali kufadhili ujenzi wa muundo huo. Mhandisi Paul D. Simpson ndiye aliyetengeneza daraja hilo na akajenga daraja hilo mwaka 1928 na Pringle Borthwick.