•with slight modifications by the Geological Stirm^ in 1906 in a report on the 

 groimd-water resources of Long Island (6)# The location of contours in doubtful 

 areas ims again shoim by dotted lines* 



The isestern part of the 1905 water-table msp, corerirg Queens and Nassau 

 Counties only^, was reproduced in 1912 by tte Board of Water Supply of the City 

 of New Tcrk in their report on obtaining an additional sajply of water for the 

 Cily of New York from Suffolk County (?)♦ 



An extension of the 190S water-table contours into Brooldyn was aade by Wiggin 

 in 1954 in an engineering report on behalf of the New lark Water Serdca Corpora"- 

 tio% objectors to the application of the City of New loik to the Water Power 

 and Contix>l Coiomissidn for additional ground««water supply in Brooklyn, Queens, 

 and Nassau (8)* Those contours, which had been terminated at the BrooKlyn?- 

 Queens boundary, were extended into Brooklyn on the basis of water leirels re- 

 ported by Stoddard (4) in 1854, trunk-sewer invert elevations, and water levels 

 from records of test borings for subway construction* The highest eleTO,tion of 

 the water taHe shown in Brooklyn for 1903 was about 20 feet» Wiggin remstrked, 

 «it is probable that a few isolated areas in the high parts of Prospect Park and 

 elsewhwere bad higher leyaLs* « « Tbe Bura>-HeringHFreaman ocmtours of IdOSi 

 were again published in 1957, by the Water Power and Control Conmiissicm. (11), 

 together with Wiggings extension of those contours into Brooklyn (8)» Com- 

 paftison was jnade with water-table contours for 1956« 



M&P OF 1908 BY BOARD OF WATER SUPPLY. CITY OF HEW lOSK 



— — — >— ii — l u i—iij— — 1 1 w ^— .^m w ■ ■ iiii n ii m ,\im ' i m mtmimmmmmtmmi^mr''im''tmmiiimmm I « i i w ii iii»» " ■ ! m .lam^timmimmmmimtiim ■ on —— tuM^ti— n— m i mm i m hh i m iiiiiii 



The report of the Board of Water Supply (7) referred to previously is ap- 

 propriately called the Spear report after Walter E* Spear, at that tLme Division 

 Ei^ineer of the Board of Water Supply^ Under his dia^ection an intaasive inves- 

 tigation was made of the ground-water resources of western Suffolk County • The 

 stucfer of groandf-water lewis was extended eastward to the longitude of Rivwhead* 



