existing interpretation, signage recommendations, and designation status. Appendix Croton Waterworks Structure Guide Structure Guide In assigning our different sign types to Croton sites we took into account the size of the structures and their locations so as to not overwhelm the sites and their respective environments, as well as their levels of evaluated significance and proximity to other site signage. Overall, we envision a kinesthetic scheme of primarily small (QR barcode) and medium signs along the Croton Waterworks, with the largest and most significant structures in the system receiving the large signs. Also of note, designations are only noted for specific structures listed in the relevant designation report. 1 Structure Guide Legend Significances Typologies Bridges / Low/High Degree of Engineering Significance Culverts / Low/High Degree of Architectural Significance / Low/High Degree of Landscaping Significance / Low/High Degree of Social and Cultural Significance Dams Fountains Gatehouses Headhouses On-Site Keeper’s Houses Off-Site Parks Unknown Reservoirs Sign Proposals Small Sign Shafts Medium Sign Siphons Support Ventilators Water Towers and Pumping Stations Weirs 2 Interpretation Large Sign Designations National Historic Civil Engineering Landmark National Historic Landmark National Register of Historic Places New York City Landmark A three story stone dwelling with a neat landscaped lot, this structure provided a home for the overseer of the Central Park reservoirs. It was located on the south side of the 86th Street transverse between a stable and shop. Designed by Calvert Vaux’s associate, Jacob Wrey Mould, the low triangular stable complex had a gateway facing the 86th Street transverse in Central Park. The stable was built to accommodate 30 horses. For more information, see fiche on page XXX. Type Significance(s) Interpretation Type Significance(s) Interpretation Structure Guide 86TH STREET KEEPER’S HOUSE STABLE 1869-1872 Plate 32-10, Old Croton Aqueduct Appendix 86TH STREET KEEPER’S HOUSE 1866 (Demolished 1935) Plate 32-9, Old Croton Aqueduct Sign Sign Current Designation(s) Current Designation(s) 93RD STREET GATEHOUSE 1876 (Demolished) Plate 32-1, Old Croton Aqueduct 86TH STREET KEEPER’S HOUSE SHOP 1869-1872 Plate 32-8, Old Croton Aqueduct A mix of brick, cast-iron and stone, the shop was a part of a triptych of structures for the overseer in Central Park. Like most of the service buildings in the park, it was screened from view by a depressed roadway. Type Significance(s) Interpretation The 93rd Street Gatehouse controlled the outlet of water from six pipes buried in conjunction with the removal of the masonry conduit in Clendenning Valley between 92nd and 113th Streets. Type Significance(s) Interpretation Sign Sign Current Designation(s) Current Designation(s) 3 98TH STREET HIGH SERVICE WORKS 1879 (Demolished) Plate 30-10, Old Croton Aqueduct Dressed in Wyoming Valley blue sandstone, the coal powered High Service Works on 98th Street was tasked with raising water 100 feet high. The accompanying tower was 170 feet high with a six foot diameter stand pipe. Type Significance(s) Interpretation Sign 119TH STREET GATEHOUSE 1894-1895 Plate 30-6, Old Croton Aqueduct The existing 119th Street Gatehouse replaced one built in the center of Amsterdam Avenue. Like its predecessor, it provided an outlet for the water under pressure in the Manhattan Valley Siphon, and regulated the movement of water to southern Manhattan. For more information, see fiche on page XXX. Type Significance(s) Interpretation Sign Current Designation(s) 113TH STREET GATEHOUSE 1876 (Adaptive Reuse - Amsterdam Nursing Home) Plate 30-8, Old Croton Aqueduct Constructed in conjunction with the removal of the masonry conduit in Clendenning Valley between 92nd and 113th Streets, the 113th Street Gatehouse controlled the inlet of water from six lines of pipes sunk beneath the ground. For more information, see fiche on page XXX. Type Significance(s) Interpretation Current Designation(s) 119TH STREET GATEHOUSE c 1840 (Demolished) Plate 30-7, Old Croton Aqueduct Located in the middle of Amsterdam Avenue, the original 119th Street Gatehouse regulated the southern outlet of the Manhattan Valley Siphon. Type Significance(s) Sign Current Designation(s) Current Designation(s) 4 Interpretation Sign As one of the more architecturally expressive gatehouses, the 135th Street Gatehouse was constructed to receive water from both the Old and New Croton Aqueducts, and regulate its distribution to Manhattan. In the case of the New Croton Aqueduct, the gatehouse served as the terminus of the conduit and the beginning of the pipe line. An addition to the High Service Works at High Bridge, this somber stone and brick Romanesque Revival engine house and tower was sited near Shaft 25. Six machines powered by coal, were capable of pumping 14 million gallons a day. Type Significance(s) Interpretation Structure Guide 179TH STREET HIGH SERVICE WORKS 1894 (Demolished) Plate 29B-, New Croton Aqueduct Appendix 135TH STREET GATEHOUSE 1884-1890 (Adaptive Reuse - Harlem Stage) Plate 30-12, Old/ New Croton Aqueduct Sign For more information, see fiche on page XXX. Type Significance(s) Interpretation Sign AMAWALK AUXILLARY DAM 1897 Plate 9-, New Croton Aqueduct Current Designation(s) Earthen with a length of 400 feet and height of 25 feet,