Colon-Ramos 1983 Ground water records for St. Croix US Virgin Islands 1969-1973

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Sub-shelf: Zenodo 8301362 — USVI freshwater gray literature
Kind: Research Report
Date: 1983
Pages: 32
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GROUND WATER RECORDS FOR ST. CROIX, U.S. VIRGIN ISLANDS 1969-1973 By Hector M. Colo'n-Ramos U.S. Geological Survey Open-File Data Report 83-546 Prepared in coopration with the Caribbean Research Institute College of the Virgin Islands St. Thomas, U.S. Virgin Islands San Juan, Puerto Rico July 1983 UNITED STATES DEPARTMENT OF THE INTERIOR JAMES G. WATT, Secretary GEOLOGICAL SURVEY Dallas L. Peck, Director For additional information write to: Chief, Caribbean District, WRD U.S. Geological Survey GPO Box 4424 San Juan, Puerto Rico 00936 (Telephone: (809) 753-4414) Copies of this report can be purchased from: Open-File Services Section Western Distribution Branch U.S. Geological Survey Box 25425, Federal Center Denver,Colorado 80225 (Telephone: (303) 234-5888) CONTENTS Abstract ............................................................. 1 Introduction ......................................................... 1 Purpose and scope ............................................... 1 Climate of St. Croix ............................................ 3 Collection of ground-water data ...................................... 3 References ........................................................... 5 Appendix 1. Water levels at Mahogany well ............................ 6 Appendix 2. Water levels at Airport uiell ............................. 12 Appendix 3. Water levels at Castle Coakley well ...................... 17 Appendix 4. Water levels at Adventure well ........................... 22 Appendix 5.. Water levels at Barren Spot well ........................ 26 Appendix 6. Water levels at River Gut well ........................... 2? ILLUSTRATIONS Figure 1. Map showing St. Croix and the location of ground-water and rainfall stations ..................................... 2 2. *^ap showing rainfall distribution on St, Croix for 1963-64* and annual average from 1915 to 1967 ....................... 4 3. Hydrographs showing water levels at Mahogany Well and rainfall at the innaly precipitation station .......... 11 4. Hydrographs showing a/ater levels at the Airport Well and rainfall at the Kingshill precipitation station ........... 16 5. rtydrographs showing water levels at Castle Coakley well and rainfall at the Kingshill precipitation station ....... 21 6. Hydrograph showing water levels at the Adventure well ..... 25 7. Hydrographs showing water levels at the Siver Gut and Barren Spot Wells ......................................... 27 III IV GROUND-WATER RECORDS FOR ST. CROIX, U.S. VIRGIN ISLANDS, 1060-73 ABSTRACT Ground-water levels at selected wells in St. Qroix* the largest of three U.S. Virgin Islands* u»ere -nonitored from 1969-73. Continuous re- cording instruments were installed at Mahogany* Castle Coakley* Airport* and Adventure wells* in central St. Croix, Monthly observations of in- stantaneous ground-water levels were also made at tu»o wells near Barren Spat and River Gut. Precipitation data from National Weather Service sta- tions near the Mahogany* Airport* and Castle Coakley wells are shown with the watei level data. INTRODUCTION Purpose and Scope St. Croix* the largest of the three U.S. Virgin Islands (about 84 square miles) is located about 50 miles east-southeast of San Juan* Puerto Rico (figure 1). Water is not an abundant resource in St. Croix* with no perennial streams and limited ground-water resources (Jordan* 1975). The aquifers are small and shallow and in many areas produce saline water. The population of St. Croix has increased dramatically to about 48*000 (1980 census). As a result of the population growth* water de- mands have also increased significantly. Ground water* although limited* is an important component df the water supplies of St. Croix. Water jells contribute about 1.1 million gallons per day (^gal/d) for domestic uses in the island ( Fernando Gonez-Go'nez* personal communication). 64°50' 64046' 64°40' 64°36' I 17°45 17°40f CARIBBEAN SEA 67°00 f CARIBBEAN SEA 66°00' 65°00 J EXPLANATION 1 OBSERVATION WELL R«4 RECORDING WELL RAINFALL STATION 18°00' LANDS 8T. CROIX Figure 1. Location of ground-water, rainfall stations and location map. GROUND-WATER RECORDS FOR ST. CROIX, U.S. VIRGIN ISLANDS, 1969-73 Purpose and Scope - Continued In 1967* in cooperation with the Water Resources Research Institute of the Caribbean Research Institute/ Collage of the U.S. Virgin Islands* the U.S. Geological Survey initiated ? project to collect ground-water data in St, Croix. The purpose of the project was to obtain baseline water- level data at selected malls throughout the island. Ground-water levels are necessary for future studies of tha ground-watar resources in St. Croix and to assist in the management and pumpaga-optimization of axisting well fields. Climate of St. Croix Precipitation over St, Croix avaragas 40 inches per year (figure 2)* with a range from 30 to 50 inches (Jordan* 1°75). Most of the rain occurs from May to Saptember* although frequent droughts can occur during any period of the year. January to March are the driest months. Rainfall effects on the recharge of the aquifers in St. Croix have not been da- fined. The data in this report includes rainfall at selected National (leather Service Stations that could be related to ground-water levels. COLLECTION OF GROUND-WATER DATA Watej level date presented in this report were obtained from a net- aork of observation uiells oparatad by tha U.S. Geological Survay* Water Resources Division* in St. Croix. The walls are located at the most important aquifers throughout .tha island. Watar levals are reported frou six (6) observation uiells* of which four (4) wara aquioped with automatic- 1963 1964 0 12345 I I II I I 10 MILES Figure 2. Rainfall distribution, in inches on St. Croix for 1963, 1964, and average-annual precipitation, 1918-67 (Modified from Jordan, 1975). GROUND-WATER RECORDS FOR ST. CROIX, U.S. VIRGIN ISLANDS, 1969-73 COLLECTION OF GROUND-WATER DATA - Continued continuous racorders. At the two other wells* water levels were measured about monthly as instantaneous values. Water-level measurements are given in feet referenced to a land sur- face datura (Isd). The land-surface datum is approximately equal to the land elevation in the vicinity o* the w-all. A measuring point is also shown for each well* also relative to the Isd. In some of the wells* a measuring soint higher than the Isd is used. At walls equipped with recorders* the nean-daily water level is shown. This contrasts with prior publications (ftobison* T,M.* 1973)* where only every fifth day is shown. At non-reco«~d ing wells the instantaneous values deter .nined during the indicated day sre shown. Water levels are reported to the nearest hundredth of a foot (0.01 ft). Periods of missing record at the walls equipped j/ith recorders are shown blank. A well description precedes each tabla of d?ta. Included are gen- eral characteristics of th<? veil, location* aquifer formation* datum to which elevations are referenced* and the period of racord. Additional information on wells and tha data published in this report nay oe available from the San Juan office of the U.S, Geological Survey* Caribbaan District. REFERENCES Jordan^ Donald G.* 1?75^ A survey of the water rasources of St. Croix^ U. S. Virgin Islands: U.S. Geological Survey Open-file Reports 51 p. Tully M.* and others/- 1973/- Water records of the U.S. Virgin Islands : U.S. Geological Survey Oata Report^ 163 p. 5 APPENDIX 1. WATER LEVELS AT MAHOGANY WELL USGS NUMBER. 174336064523200. Local number 17. LOCATION. Lat 17 43' 36", Long 64 52' 32". OWNER. U.S. Virgin Islands Government. NAME. Mahogany Road 3 a/ell. AQUIFER.-- Alluvium of quaternary age and volcanic rock of cretaceous age. WELL CHARACTERISTICS. Drilled unused water table, diameter 6-in cased 0-104 ft, perforated 64-104 ft. Depth 104 ft. DATUM. Altitude of Isd is 70 ft above mean sea level. MEASURING POINT. Top of 6-in casing, which is 3.6 ft above Isd. REMARKS. Recording observation well. Affected by nearby pumpage. PERIOD OF RECORD. Water levels: 1964-7^ Cdiscontinuedl. EXTREMES FOR PERIOD OF RECORD. Highest water level 26.24 ft below Isd, Dec. 16, 1969; lowest water level 74.31 ft below Isd, Mar. 29, 1965. WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, ON 5TH, 10TH, 15TH, 20TH, 25TH, AND LAST DAY OF MONTH CALENDAR YEAR JANUARY 1969 TO DECEMBER 1969 Day Jan. Feb. Mar, 5 10 15 20 25 eom 72.71 72.75 72.76 72.94 72.83 72.89 72.92 72.89 72.91 72.87 72.88 72.98 72.88 72.79 72.71 72.67 72.65 Apr. May June July Aug. 72.69 39.89 57.18 40.55 70.38 42.26 39.88 42.95 39.26 43.66 Sep. Oct. Nov Dec 44.22 44.77 50.60 45.92 46.25 46.57 46.34 - 45.35 46.73 46.45 45.96 45.54 45.05 46.89 43.32 35.20 30.86 27.19 26.29 26.85 27.76 29.37 Continued APPENDIX 1. - Continued MEAN-DAILY-WATER LEVEL IN FEET BELOW LAND-SURFACE DATUM CALENDAR YEAR JANUARY 1970 TO DECEMBER 1970 Day Jan.. Feb. Mar. Apr. May June July Aug. Sep. Oct. Nov. Dec. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 7 13 19 20 21 22 23 24 25 26 27 23 29 30 31 29.32 30.09 30.39 30.69 30.97 31.25 31.54 31.80 32.05 32.32 32.59 32.35 33.11 33.37 33.62 33.85 34.06 34.24 34.43 34.59 34.76 34.94 35.07 35.27 35.43 35.57 35.72 35.38 36.03 36.19 36.33 36.53 36.64 36.80 36.95 37.09 37.26 37.42 37.57 37.74 37.93 38.07 33.26 38.43 38.59 38.79 38.97 39.11 39.27 39.43 39.66 39.83 39.99 40.16 40.32 40.47 40.62 40.79 40.95 41.13 41.31 41.45 41.61 41.30 41.92 42.06 42.23 42.40 42.57 42.74 42.91 43.06 43.22 43.40 43.36 44.04 44.20 44.38 44.56 44.74 44.91 45.07 45.24 45.43 45.62 45.30 45.97 46.14 46.31 46.50 46.67 46.37 47.04 47.20 47.41 47.59 47.77 47.95 48.12 43.29 48.47 48.62 48.31 48.98 49.18 49.30 49.45 49.65 49.35 50.02 50.18 50.35 50.51 50.69 50.87 51.05 51.23 51.40 51.56 51.72 51.88 52.03 51.96 52.28 52.43 52.57 52.70 51.80 52.99 53.08 53.01 52.87 52.82 52.71 52.54 52.38 52.22 52.10 51.91 51.70 51.49 51.28 51.10 50.91 50.71 50.52 50.34 50.17 49.98 4^.79 49.58 4<*.42 49.28 49.06 43.91 48.71 43.52 43.40 43.18 43.00 47.84 47.67 47.51 47.33 47.18 46,90 46.65 46.35 46.05 45.30 45.50 45.25 44.95 44.70 44.40 44.14 43.92 43.61 43.30 43.00 42.73 42.43 42.15 41.86 41.55 41.30 - . - . - - - - 36.25 36.28 36.30 36.33 36.36 36.41 36.47 36.53 36.58 36,66 36.76 36.85 36.95 37.07 37.16 37.27 37.38 37.49 37.60 37.71 37.35 37.99 33.11 38.25 33.38 38.52 33.69 39.83 39.96 40,11 40.27 40.44 40.60 40.76 40.92 41.08 41.19 41.35 41.50 41.63 41.76 41.89 42.02 42.15 42.29 42.44 42.57 42.67 41.00 41.94 42.03 42.22 42.35 42.51 42.65 42.73 Continued MEAN-DAILY-WATER LEVEL IN FEET BELOH LAND-SURFACE DATUM CALENDAR YEAR JANUARY 1972 TO DECEMBER 1972 Mar. Apr. May June July Aug. Sep. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 5 16 17 13 19 20 21 22 23 24 25 26 27 23 29 30 31 62.38 62.82 62.73 62.77 62.60 62.52 62.44 62.37 62.25 62.15 61.07 61.97 61.33 61.77 61.62 61.40 61.38 61.27 61.17 60.06 60.95 60.37 60.70 60.48 60.24 59.99 59.75 59.53 59.32 59.03 58.70 58.61 58.52 53.44 58.37 53,29 53.22 58.15 58.08 58.01 53.96 53.91 5.3.33 53.34 53.32 58.79 58.75 58.72 53.70 53.67 53.65 58,64 53.62 53.60 53.60 53.60 58.61 58.60 53.60 53.60 0.00 0.00 57.58 57.58 57.64 57.64 57.64 57.57 57.69 57.71 57.73 57.76 57.79 57.83 57.88 57.92 57. 95 57.98 53.02 53.07 53.12 53.17 53.21 53.25 58.30 58.34 53.38 53.42 53.45 53.48 53.53 53.58 58.61 58.66 58.70 58.72 58.77 58.32 58.35 58.88 58.92 53.96 58.99 58.85 58.98 59.09 59.11 5^9 1 3 59.15 59.16 59.17 59.20 59.19 59.20 59.21 59.17 59.20 59.19 59.18 59.18 59.17 59.15 59.14 0.00 59.12 59.11 59.10 59.07 59.06 59.05 59.00 59.00 58.95 58.95 58.90 53.90 58.85 53.35 58.80 58.30 53.75 53.75 58.70 58.70 53.65 58.65 5S.60 53.60 53.55 53.55 53.50 53.50 58.45 58.45 53.42 58.41 58.42 53.42 58.43 53.44 53.46 53.48 53.50 58.55 53.58 53.62 53.67 53.71 53.76 S|3 5C 58.35 53.90 58.96 59.04 59.12 59.19 59.27 59.35 59.42 59.48 59.59 59.69 59.78 59.34 59.94 0.00 60.04 60.11 60.16 60.25 60.40 60.45 60.56 60.66 60,75 60.86 60.95 61.08 61.19 61.29 £4_t»_3-8_ 61.49 61.59 61,69 61.79 61.88 61.97 62.07 62.14 62.23 61.32 61.39 61.45 61.54 61.61 61.68 62.75 62.77 62.85 62.90 62.97 63.03 63.09 63.16 63.21 63.27 63.33 63.33 63.44 63.50 63.55 63.60 V -J w W 63.66 63.72 63.77 63.82 63.38 63.94 63.99 64.05 64.11 64.16 64.21 64.27 64.32 64.37 64.42 64.48 64.56 64.65 64.57 64.73 64.36 64.93 64.99 65.16 65.15 65.22 65.31 65.37 65.45 65.51 65 58 v J m J w 65.67 65.72 65.81 65.38 65.96 66.03 66.09 66.16 66.21 66.28 66.35 66.42 66.47 66.55 66.61 0.00 66.66 66.76 66.25 66.76 66.38 66.92 66.96 67.00 67.03 66.92 67.06 67.12 67.15 67.19 67« 23 67.27 67.15 67.31 67.34 67.38 67.43 67.47 67.50 67.54 67.58 67.62 67.65 67.67 67.69 67.72 67.75 67.78 67.82 67.83 67.84 67.86 67.89 67.91 67.94 67.96 67.99 63.02 68.05 68.07 68.11 _ &8»^4 68.17 68.19 68.21 63.24 68.26 68.29 63.32 68.34 63.37 68.41 63.44 68.47 68.50 68.54 68.57 0.00 68.60 68.64 68.67 68.70 68.70 68.75 68.75 68.75 63.30 68.80 68.80 68.85 68.90 68.90 '68^90^ 63.90 68.90 68.90 63.35 68.85 63.85 68.85 68.80 63.30 68.80 68.75 68.75 63.75 63.70 68.70 63.65 APPENDIX 1. - Continued MEAN-9AILY-WATER LEVEL IN FEET BELOW LAND-SURFACE DATUM CALENDAR YEAR JANUARY 1973 TO DECEMBER 1973 Day Jan. Feb. Mar. Apr. May June July Aug. Sep. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 13 19 20 21 22 23 24 25 26 27 28 29 30 31 63.60 68.57 68.53 68.48 63.48 68.48 68.48 68.48 68.48 63.49 68.50 68.51 68.52 63.52 68.63 68.54 68.56 68.58 68.59 63.60 68.61 68.62 63.63 68.64 63.66 68.66 63.67 68.68 63.68 63.69 68.70 68.70 68.70 68.70 68.70 68.71 68.72 68.72 68.72 68.73 68.73 68.73 68.74 68.74 68.74 68.75 63.76 68.77 68.77 68.77 63.77 68.77 63.77 68.77 63.78 68.78 63,79 68.30 68.82 63.32 68.84 63.84 68.85 68.35 68.85 63.90 68.90 68.90 63.90 68.95 63.95 68.95 68.95 69.00 67.00 69.00 69.00 69.00 69.05 69.05 69.05 69.10 69.10 69.10 69.10 69.10 69.15 69.15 69.15 69.15 69.20 69.20 69.19 69.19 69.21 69.23 69.26 69.27 69.29 69.31 69.32 69.33 69.33 69.33 69.35 69.36 69.36 69.38 c9.41 69.42 69.43 69.45 69.45 6?.46 69.46 69.49 69.50 69.52 69.54 69.54 69.55 69.56 69.56 69.57 69.58 69.60 69.62 69.63 69.64 69.64 69.65 69.65 69.65 69.65 69.65 69.65 69.64 69.64 69.64 69.64 69.64 69.64 69.64 69.64 69.64 69.64 69.64 69.64 69.64 69.64 69.64 69.65 69.65 69.65 69.65 69.65 69.65 69.66 69.67 69.68 69.69 69.64 69.69 69.66 69.70 69.70 69.71 69.70 69.69 69.68 69.67 69.67 69.56 69.66 69.66 69.68 69.71 69.74 69.77 69.79 69.31 69.34 69.87 69.90 69.93 69.98 70.00 70.03 70.05 70.08 70.10 70.13 70.15 70.18 70.20 70.23 70.24 70.24 70.24 70.25 70.25 70.26 70.26 70.26 70.26 70.25 70.24 70.23 70.22 70.22 70.22 70.22 70.24 70.25 70.24 70.24 70.24 70.24 70.24 70.25 70.25 70.25 70.25 70.25 70.24 70.14 70.21 70.21 70.21 70.21 70 r 21 70.22 70.23 70.25 70.27 70.28 70.29 70.30 70.32 70.33 70.34 70.36 70.37 70.28 70.36 70.36 70.36 70.36 70.34 70.35 70.37 70.30 70.37 70.37 70.37 70.38 70.38 70.28 70.38 70.40 70.42 70.42 70.42 70.42 70.42 70,42 70.42 70.32 70.36 70.38 70.40 70.30 70.38 70.33 70.36 70.37 70.37 70.37 70.37 70.36 70.36 70.36 70.36 70.35 70.14 70.18 70.31 70.29 70.32 70.33 70.34 70.24 70.33 70.32 70.32 70.28 70.27 70.27 70.24 70.21 70.19 70.17 70.15 70.16 70.15 70.15 70.15 70.14 70.14 70.12 70.13 70.13 70.13 70.14 70.13 70.13 70.13 70.14 70.14 70.15 70.15 70.16 70.16 70.17 70.18 70.20 70.21 70,22 70.24 70.25 70.28 70.29 70.31 70.32 - 70.34 70.35 70.36 70.38 70.39 70.39 70.42 70.45 70.48 70.51 70.55 70.59 70.61 70.63 70.65 70.67 70.68 70.69 70.70 70.73 70.75 70.77 70.79 70.81 70.84 70.85 70.88 70.90 70.92 70.94 70.95 MEAN-DAILY-WATER LEVEL IN FEET BELOW LAND-SURFACE DATUM CALENDAR YEAR JANUARY 1971 TO DECEMBER 1971 Day Jan Feb. Mar. Apr. May June July Aug. Sep. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 , , , , . . , . - .__ .«. , , , , , . , , , . . 53.98 54.03 54.11 54.20 54.35 54.40 54.50 54.58 54.68 54.79 54.90 55.00 55.11 55.20 55.32 55.TO 55.49 55.57 55.67 55.76 55.87 55.95 56.03 56.10 56.20 56.28 56.37 56.45 56.53 56.60 56.70 56.78 56.38 56.96 57.05 57.20 57.28 57.35 57.43 57.52 57.60 57.72 57.80 57.88 58.00 58.05 T8VR^ 58.24 58.31 53.40 58.48 58.58 53.68 53.78 58.85 53.95 59.08 59.18 59.29 59.38 59.47 59.57 59.68 59.81 59.81 59.98 60.08 60.16 60.24 60.34 60.41 60.49 60.57 60.64 60.74 60.82 60.90 ^5.9^ 61.04 61.12 61.20 61.28 61.36 61.42 61.48 61.55 61.63 61.68 61.75 61.83 61.90 61.98 - 62.04 62.10 62.17 62.22 62.27 62.33 62.37 62.39 62.49 62.50 62.54 62.59 62.63 62.68 62.72 62.75 62.78 62.83 62.36 62.89 62.91 62.96 63.00 63.04 63.09 63.13 63.18 63.23 63.33 63.34 63.35 63.36 63.29 63.38 63.39 63.40 63.40 63.40 63.49 63.41 63.67 63.64 63.65 63.66 63.68 63.69 63.70 63.71 63.75 63.30 63.81 63.82 63.33 63.83 63.84 63.35 63.86 63.36 63.36 63.36 63.36 63.87 63.87 63.86 63.36 63.86 63.86 63.86 63.86 63.85 63.33 63.81 63.80 63.78 63.75 63.75 63. 7T 63.69 63.66 63.65 63.61 63.56 63.51 63.48 63.25 63.31 63.29 63.26 63.20 63.08 62.98 62.90 Continued RAINFALL. IN INCHES OB O WATER LEVEL. IN FEET BELOW LAND-SURFACE DATUM -* -* to O 01 O 01 O Mar. Apr. NO IU|1 A S July Jan. " Feb. " Mar. " Apr. ' " May ...... .. .............. Nov. '- " - --- Jan. ' " Feb. ' " Mar. " " T Apr. " - June ' July ' Sept. ' - Oct. ' - - Nov. ' -- T Dec. l -- Feb. ' ""' Mar. ' ' "" Apr. " ' May "" June ' - July '" Aug. '""" ' Dec. ' " "" " ^ Feb. "' Mar. """ Apr. ' ' May " June Aug. ' " " " " " " " Oct. " Nov. '" X A Ol «. Q fO O O O O O O TP > i!. r ._...._._.._......_.._.....__...... ..._..-___... ... r .......__........._-.._...-_.-... - ........... ...t: ................................... ....... .......i2... .......... ..^. ................. * ........................ ^.. ........................ * \ "" * u . \ . .* '' ;;," " ...................^-.....T.................. S O * N ^*. O ............ ....... -+*^-- >t.-. ............... H ....-......._...._._..._.--._-........._....... t .. ______ ------_---. .I'rt-- ----------------------- c> 0 .............. .....^.. ......................... _: _-_-_ __-_.__ ^ _______________________ > f ------^-- ---------- if " ----- ------- ----------- ------ L_ j ^ | s I ^ ' ! II~n ly ^rii JI X ^'T ) . .................. iT 1 1 flIT B I f fl Tl Oc ^1 O CO 09 O IQ 3 Q. <0 01 <0 5, <o £ x^ »* » r+o" 3 fl» r+ CO <0^ 10 CD^ c» N> APPENDIX 2. WATER LEVELS AT AIRPORT WELL USGS NUMBER. 174159064481900. Local number 13. LOCATION.-- Lat 17 41' 59"* Ion 64 43* 19". OWNER. U.S. Virgin Islands Government. NAME. Airport 39 well. AQUIFER. Marl and limestone of Tertiary Age. WELL CHARACTERISTICS. Drilled unused mater table wall* diameter 3-in* cased 0-110 ft, perforated 53-110 ft. Depth 110 ft. OATUM. Altitude of Isd is 35 ft above mean saa level. MEASURING "OINT. Top of 8~in casing* which is 1.7 ft above Isd. REMARKS. Recording observation well. PERIOD OF RECORD.-- Water levels: 1962-73 Cdiscontinuedl. EXTREMES FOR PERIOD OF RECORD. Highest water level 29.30 ft below Nov. 16* 1962; lowest water level 36.63 ft below Isd* June 27* 1962 LOWEST WATER LEVEL IN FEET BELOW LAND-SURFACE*OATUM* ON 5TH* 10TH* 15TM* 20TM* 25TH* AND LAST DAY OF MONTH CALENDAR YEAR JANUARY 1969 TO DECEMBER 1969 Day 5 10 20 25 eom Jan. Feb. Mar, Apr. 31.47 31.45 X4 TO 31.42 31.46 31.49 31.55 31.55 31.56 31.55 31.58 31.49 31.47 31.63 31.65 31.66 31.66 31.71 31.73-- 31.74 May June July Aug. Sep. 31.19 31 «20 31.14 29.85 29.88 30.23 30.37 30.53 30.60 30.66 30.72 30.76 -.-.« .__ «,-« . ,. __ 30.83 30.82 30.04 30.88 30.83 30.82 30.84 30.83 30.85 30.90 3-Q~.~T-2~ 30.89 , Oct. Nov Dec 30.65 20.62 30.65 30.66 30.66 30.67 30.57 30.50 30.57 30.57 30.57 30.58 30.61 30.62 Day 5 10 15 20 25 eom Continued Jan, Feb. CALENDAR YEAR JANUARY 1970 TO DECEMBER 1970 Mar. Apr. May June July Aug. Sep. 30.66 30.65 30.61 30.68 30.71 30.72 30.71 30.63 30.63 30.96 30.96 30.98 31.05 31.06 31.10 30.85 30.83 30.89 30.89 30.89 30.91 30.91 30.95 30.94 30.85 30.83 30.79 30.80 30.86 30.92 30.91 30.92 30.88 30.79 30.77 30.75 30.75 30.69 30.68 30.48 30.45 30.44 30.43 30,43 30.42 30.42 Oct, Nov. Dec. APPENDIX 2. - Continued MEAN-DAILY-WATER LEVEL IN FEET BELOW LAND-SURFACE DATUM CALENDAR YEAR JANUARY 1971 TO DECEMBER 1971 Day Jan, July Sep 1 2 3 4 5 6 7 3 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 29.36 29.38 29.39 29.40 29.42 29.44 29.47 29.50 29.53 29.56 29.58 29.60 29.62 29.63 29.64 29.65 29.67 29.69 29.70 29.71 29.73 29.75 29.76 29.76 29.78 29.79 29.80 29.82 29.83 29.83 29.84 29.85 29.36 29.87 29.88 29.89 29.90 29.91 29.92 29.93 29.94 29.95 29.96 29.96 29.97 29.97 29.98 29.99 30.01 30.01 30.02 30.02 30.03 30.03 30.03 30.03 30.03 30.01 29.99 - 29.98 30.00 30.02 30.03 30.03 30.03 30.03 30.03 30.03 30.03 30.03 30.03 30.03 30.03 30.03 30.03 30.04 30.05 30.06 30.07 30.07 30.07 30.08 30.09 30.09 30.10 30.10 30.10 30.10 30.10 30.12 30.13 30.12 30.12 30.11 30.12 30.11 30.11 30.10 30.10 30.10 30.10 30.11 30.12 30.13 30.13 30.13 30.14 30.14 30.15 30.16 30.17 30.18 30.19 30.20 30.20 30.21 30.22 30.22 30.22 30.23 30.23 30.23 30.22 30.22 30.23 30.24 30.24 30.25 30.26 30.27 30.28 30.28 30.28 30.28 30.27 30.27 30.26 30,26 30.25 30.24 30.23 30.23 30.23 30.22 30.21 30.20 30.20 30.19 30.19 30.19 30.18 30.18 30.17 30.18 30.17 30.17 30.16 30.16 30.16 30.17 30.19 30.20 30.19 30.19 30.19 30.19 30.19 30.18 30.19 30.20 30.21 30.23 30.23 30.24 30.25 30.26 30.26 30.26 33.25 30.25 30.25 30.26 30,27 3D. 27 30.28 30.29 30.29 30.30 30.30 30.31 30.32 30.32 30.33 30.33 30.34 30.34 30.35 30.35 30.36 30.36 30.37 30.38 30.38 30.39 30.39 30.40 30.40 30.41 30.42 30.42 30.43 30.44 30.44 30.44 30.45 30.45 30.45 30,46 30.46 30.46 30.46 30.45 30.44 30.44 30.43 30.43 30.44 30.45 30.45 3Q.44 30.43 30.42 30.41 30J39 30.38 30.37 30.36 30.34 30.33 30.33 30,32 30.31 30.29 30.28 30.25 50.22 3'0.19 SO. 16 ^30.14 30.13 30.12 30.11 30.11 30.12 30.12 30.12 30.12 30.13 30.13 30.13 30.12 30.13 30.13 30.14 30.14 30.15 30.16 30.16 30.17 30.17 30.17 30.17 30.18 30.18 30.16 30.16 30.15 30.14 30.13 30.13 30.13 30.13 30.13 30.14 30.14 30.14 30.14 30.13 30.11 30.09 30.07 30.05 30.04 30.03 30.01 29.93 29.84 29.74 29.67 29.62 29.58 29.64 29.63 29.63 29.62 29.62 29.63 29.64 29.65 29.67 29.68 29.69 29.71 29.72 29.73 29.74 29.75 29.76 29.77 29.77 29.68 29.67 29.68 29.69 29.71 29.71 29.72 29.72 29.73 29.72 29.72 29.71 29.71 29.72 29.72 29.72 29.73 29.74 29.76 29.77 29.78 29.79 29.79 29.80 29.82 29.83 29.83 29.84 29.84 29.87 29.90 29.92 29.95 29.97 29.98 29.98 29.97 29.96 29.93 29.92 29.91 29.91 29.92 29.94 29.95 MEAN-DAILY-WATER LEVEL IN FEET BELOH LAND-SURFACE DATUM CALENDAR YEAR JANUARY 1972 TO DECEMBER 1972 Mar. Apr. May Juna July Aug. Sep. 1 2 3 4 5 6 7 3 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 29.97 29.98 30.00 30.01 30.02 30.02 30.03 30.04 30.06 30.07 30.09 30.10 30.11 30.12 30.11 30.10 30.09 30.07 30.06 30.05 30.05 30.05 30.05 30.06 30.07 30.07 30.09 30.09 30.11 30.11 30.11 30.12 30.12 30.12 30.12 30.13 30.14 30.14 30.15 30.16 30.16 30.17 30.18 30.18 30.18 30.18 "^ n 1 R 30.18 30.19 30.20 30.21 30.23 30.24 30.26 30.27 30.28 30.30 30.30 39.28 30.27 30.27 30.24 30.21 30.18 30.17 30.16 30.16 30.17 30.18 30.19 30.19 30.19 30.19 30.19 30.19 30.19 30.19 30.19 30.19 30.19 30.19 30.20 30.19 30.18 30.17 30.16 30.16 30.15 30.15 30.14 30.14 30.14 30.14 30.16 30.18 30.20 30.21 30.22 30.22 30.23 30.23 30.23 30.22 30.22 30.22 30.22 30.2^ 30.23 30.24 30.25 30.26 30.26 30.27 30.27 30.26 30.26 30.26 30.26 30.26 30.26 30.26 30.27 30.27 30.28 30.29 30.30 30.30 30.31 30.31 30.3-1 30.32 30.32 30.33 30.33 30.34 30.34 30 "55 J W J * 30.36 30.36 30.36 30.36 30.36 30.36 30.38 30.40 30.40 30.41 30.41 30.41 30.41 30.42 30.42 30.42 30.42 30.42 30.42 30.40 30.40 30.19 30.39 30.39 30.39 30.39 30.39 30.39 30.39 30.39 10.40 30.40 30.41 30.42 30.42 30.43 30.43 30.44 30.45 30.46 30.47 30.48 30.49 30.50 30.50 - 30.48 30.46 30.44 30.43 30.42 30.42 30.41 30.41 30.42 30.42 30.43 30.44 30.44 30.44 30.44 30.43 30.43 30.43 30.43 30.44 30.45 30.46 30.46 30.46 30.47 30.48 30.48 30.48 30.49 30.50 30.50 30.48 30.44 30.45 30.46 30.46 30.46 30.46 30.47 30.47 30.47 30.46 30.46 30.45 30.44 30.43 30*44 30.44 30.45 30.45 30.46 30.46 30.46 30.46 30.46 30.46 30.45 33.44 30.44 30.44 30.45 30.46 30.48 30.47 30.46 30.44 30.41 30.40 30.39 30.38 30.38 30.37 30.37 30.38 30,38 30.39 30.39 30.39 30.40 30.40 30.40 30.40 30.40 30.39 30.39 30.38 30.38 30.38 30.38 30.38 30.37 30.37 30.37 30.37 30.37 30.36 30.34 30.32 30.31 30.30 30.30 30.30 30.30 30.30 30.32 30.32 30.34 30.34 30.35 30.36 30.36 30.36 30.35 30.35 30.36 30.36 30.37 30.38 30.39 30.40 30.40 30.38 30.36 30.35 30.34 30.30 30.30 30.31 30.31 30.33 30.34 30.36 30.37 30.38 30.40 30.40 30.41 30.41 9 n / o 30.41 30.42 30.43 30.44 30.45 30.47 30.48 30.50 30.51 30.52 30.54 30.55 30.56 30.56 . 30.57 30.58 30.60 30.60 30.59 30.58 30.58 30.57 30.55 30.52 30.49 30.44 30.41 30.38 30.36 TQ Jit 30.33 30.32 30.31 30.31 30.31 30.31 30.30 30.30 30.31 30.30 30.30 30.31 30.31 30.31 30.32 APPENDIX 2. - Continued MEAN-DAILY-WATER LEVEL IN FEET BELOW LAND-SURFACE DATUM CALENDAR YEAR JANUARY 1973 TO DECEMBER 1973 Feb. Mar. Apr. May June July Aug. Sep. Oct 1 30.32 30.52 30.72 30.33 31.02 31.00 31.04 2 30.33 30.53 30.72 30.32 30.38 31.03 30.99 30.05 3 30.33 30.54 30.72 30.81 30.33 31.03 30,99 31.06 4 30.34 30.55 30.73 30.82 30.39 31.03 30.98 31.07 5 30.35 30.55 30.73 30.32 30.39 31.03 30.98 31.08 6 30.36 30.56 30.73 30.83 30. ?Q 31.03 30.99 7 30.37 30.56 30.73 30.34 30.91 31.03 30.99 3 30.38 30.56 30.73 30.35 30.91 31.04 31.00 9 30.39 30.55 30.74 30.85 30.91 31.05 31.01 10 30.39 30.55 30.74 30.86 30.92 31.07 31.01 11 30.38 30.55 30.75 30.86 30.92 31.08 31.02 12 30.38 30.55 30.76 30.36 30.93 31.08 31.01 13 30.39 30.56 30.78 30.87 30.94 31.10 31.01 14 30.39 30.57 30.78 30.37 30.94 31.10 31,00 15 30.40 30.57 30.79 30.88 30.95 31.10 30.98 16 30.41 30.53 30.80 30.38 30.96 31.09 30.96 17 30.42 30.58 30.80 30.38 30.96 31.08 3Q.94 18 30.42 30.59 30.30 30.88 30.97 31.07 33.93 19 30.41 30.59 30.80 30.39 30.97 31.06 30.93 20 30.40 30.60 30.30 30.89 30.98 31.05 30.94 21 30.41 30.60 30.80 30.89 30.98 31.05 30.96 22 30.41 30.60 30.80 30.39 30.99 31.04 30.97 23 30.42 30.60 30.80 30.39 30.99 31.03 30.98 24 30.42 30.60 30.80 30.89 30.99 31.02 30.98 25 30.43 30.60 30.82 30.88 30.99 31.02 30.99 26 30.44 30.60 30.83 30.38 31.00 31.02 31.00 27 30.46 30.60 30.33 30.87 31.00 31.03 31.00 28 30.47 30.61 30.84 30.86 31.00 31.03 31.01 29 30.48 30.84 30.86 31.01 31.03 31.02 30 30.49 30.84 30.85 31.02 31.02 31.03 31 30.51 30.84 31.01 31.04 «0o ^m» 1Q Oc 0 ^^ 1 1 » 0 (D < -L (D « » s » * 7 (D > n o O * * (D J -1 «D CD -M 3 -* O. 0 3 CD ^» " X 3* 0 CO _. o "^ 10 o (D fj_ "" »+ CD O 3 CO CD O <D 3 N CO RAINFALL. IN INCHES -t -t 10 » o 01 o 01 o c Feb. Apr. ""' June T July ' " ' i Aug. TT Oct. ' ' 1 T Nov. " --}- --"j- Dec. ""' Jan. ' ' Feb. ' Mar. ' Apr. June T July ' ' 1 Aug. , . ^ _ , i i Dec. T Ti T Jan. f" . _ _ _ _ __ ___ __ ._ -- -4- Mar. f" Apr. "" 11 1 June ^" Nov. ' "' 1 Dec. Feb. "" Apr. I way ::______Jf_I. _______________________ ______ June ' ""' I July Aug. Nov. " j I Dec. "T- " ' ! 1 1 ] Feb. "' : Apr. " i May '"" r T- -^ I I I I June """" ' ~f ' ~^ July ""J.T _^ -(-+-!- Aug. "5"]J T i 1 Sept. 1 j j^ Oct. 3 Nov. JJ Dec. |>> WATER LEVEL. IN FEET BELOW LAND-SURFACE DATUM a w « o w M M 10 -* 0 « « T 1 i ' , If 1 M ' L \ *^ K' i " « . j 7 .. ^ v « -"** i/ 1 j\ p i ^ I k _L / ------ ~~/i~---~~~ - - i ' ; L,\\ -L V-i : - II O 1 '* \ ^ 1 u j_y 3» , i ,i 1 /''' "^ i 111 j 1 i 1 * / 7 | J 1 ^ ^^ "*"3' I I Hi I t i 11 T ) \ ~f 1 "^ i j 1 - ! ' 1 r" k | I ^L i 1 Jf ' i ji i [ Sl ' II ! V ' I X j ! T ^ i 1 / 1 i [ ^ F ^ 1L 1 APPENDIX 3. WATER LEVELS AT CASTLE COAKLEY WELL USGS NUMBER. 174339064445100. Local number USGS-46. LOCATION. Lat 17 43' 39", long 64 44' 51". OWNER. U.S. Virgin Islands Government. NAME. USGS-46 CCastle Coakleyl. AQUIFER. Marl and limestone of Tertiary Aga. WELL CHARACTERISTICS. Drilled unused mater-table well, diameter 6-in, cased 0-154 ft, slotted 94-154 ft. Depth 154 ft. DATUM. Altitude of Isd is 97 ft aoove mean sea level. ?4EASURING »OINT. Top of shelter floor, which is 2.3 ft above Isd. REMARKS. Recording observation well. PERIOD OF RECORD. Water levels: 1969-73 Cdiscontinued]. EXTREMES FOR PERIOD OF RECORD. Highest mater level 32.44 ft below Isd, Jan. 1, 1971; lowest mater level 90.11 ft belom Isd, May 10, 1969. LOWEST WATER LEVEL IN FEET BELOW LAND-SURFACE DATUM, ON 5TH, 10TH, 15TH, 20TH, 25TH, AND LAST DAY OF MONTH CALENDAR YEAR JANUARY 1969 TO DECEMBER 1969 Day Jan. Feb. Mar. Apr, May June July Aug. 5 10 15 20 25 eon 89.95 89.88 89.76 89.74 89.76 89.77 89.81 39.78 89.78 39.80 39.81 89.79 89.83 39.86 90.00 39.96 89.93 89.99 90.00 90.01 90.09 - 90.11 90.00 89.71 89.08 88.59 87.34 87.20 37.20 37.26 87.29 87.34 87.35 87.35 87.33 87.33 37.36 37.40 87.45 87.43 - . -* Sep. 88.18 88.16 Oct. 88.10 88.12 88.17 88.00 87.95 87.90 Nov. 87.99 86.83 Dec. 36.82 86.80 36.78 86.76 86.70 Day 5 10 15 20 25 on Jan, Feb. 83.70 88.77 88.83 87.39 CALENDAR YEAR JANUARY 1970 TO DECEMBER 1970 Mar. Apr. May June July Aug. Sep. 88.01 88.70 . 87.54 87.60 87.55 87.49 87.48 87.43 87.39 87.39 87.38 87.39 87.38 87.30 86.60 86.53 86.55 86.50 86.50 86.47 86.54 89.85 90.05 Oct. Nov. Dec. Continued APPENDIX 3. - Continued MEAN-DAILY-W4TER LEVEL IN FEET 3ELOW LAND-SURFACE DATUM CALENDAR YEAR JANUARY 1971 TO DECEMBER 1971 Day 1 2 3 4 5 6 7 3 9 10 11 12 13 14 15 T6 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Jan. 82.44 82.47 82.48 82.53 82.59 82.63 82.70 82.76 82.78 82.34 82.85 82.91 82.99 83.03 83.04 83.04 83.06 83.10 83.16 83.26 83.24 83.26 83.29 83.33 83.39 83.33 83.44 83.47 83.51 83.53 83.52 Feb. 83.56 83.58 83.60 83.60 83.62 83.68 83.64 83.71 83.72 83.72 83.75 83.76 83.77 83.76 83.77 83.77 83.82 83.82 83.84 83.85 83.84 83.35 83.36 83.86 83.87 83.89 83.90 83.38 .- - Mar. 83.85 83.36 33.89 83.91 83.91 83.94 83.94 83.93 83.93 83.90 83.39 83.89 83.88 83.38 83.37 83.38 83.90 83.94 83.95 83.94 83.96 83.96 33.95 83.96 83.99 84.01 84.00 84.02 84.05 84.07 84.03 Apr. 84.11 84.12 84.10 84.10 84.08 84.07 34.02 33.98 83.95 83.94 83.92 83.90 83.93 83.94 83.93 83.92 33.94 83.98 83.98 83.98 84.02 84.04 84.07 84.08 84.07 84.10 84.11 84.12 34.16 84.20 May 84.19 84.14 84.18 84.18 84.19 84.22 84.23 84.25 84.24 84.24 84.25 84.24 84.22 84.19 84.16 84.13 84.10 84.11 84.18 84.19 84.18 84.13 84.17 84.17 84.15 84.10 84.07 84.07 84.09 84.13 84.09 June 84.08 34.06 84.04 84.00 83.95 83.93 83.92 33,39 83.39 83.38 33.39 83.38 83.36 33.39 33.93 83.90 83.92 83.91 83.91 83,39 B3.39 83.90 33.92 83.95 83.95 83.93 83.92 33.91 33.92 83.95 - July 84.65 84.68 84.71 84.71 34.68 84.63 84.71 84.71 84.71 34.74 84.74 84.73 84.74 84.78 84.30 84.32 84.81 84.79 84.81 84.30 84.77 84.76 84.75 84.75 84.75 84.76 84.77 34.76 84.72 84.74 84.75 Aug. 84.74 84.72 84.72 84.72 84.73 84.73 84.73 84.73 84.72 84.73 84.72 84.75 84.75 84.73 84.71 84.69 84.68 84.69 84.70 84.70 84.72 84.74 84.77 84.74 84.72 84.73 84.77 84.33 84.39 85.01 85.12 Sep. 85.17 85.18 . .- . - 83.52 Oct. 83.50 83.50 83.51 83.53 83.57 83.56 83.56 83.56 83.58 83.61 83.61 83.63 83.63 83.62 83.65 83.66 83.65 83.60 83.56 83.51 33.42 83.34 83.32 83.30 83.23 83.16 83.10 83.05 82.97 82.92 82.39 Nov. 82.90 82.90 82.86 82.36 82.35 82.84 82.79 82.75 82.72 82.69 82.66 82.68 82.70 82.68 82.66 82.63 82.65 82.70 82.68 82.67 82.67 82.68 82.69 82.69 82.68 82.66 82.69 82.72 82.70 82.75 Dec. 82.79 82.30 82.82 82.82 82.87 82.86 82.38 82.37 82.87 82.89 82.92 82.92 82.91 82.95 83. m 83.01 83.04 83.06 83.08 83.09 83.10 83.10 83.10 83.10 83.11 83.13 83.18 83.20 83.16 83.17 83.14 Continued APPENDIX 3. - Continued MEAN-DAILY-WATER LEVEL IN FEET BELOW LAND-SURFACE DATUM CALENDAR YEAR JANUARY 1972 TO DECEMBER 1972 Day 1 2 3 4 5 6 7 3 9 10 11 12 13 14 15 16 17 13 19 20 21 22 23 24 25 26 27 28 29 30 31 Jan. 83.16 83.17 33.18 83.21 83.26 33.25 83.26 83.30 83.32 83.32 83.33 83.34 83,33 83.32 83.32 83.32 83.31 83.32 83.35 83.34 83.34 83.34 83.34 83.36 83.37 83.42 33.44 83.46 83.46 83.47 83.46 Feb. 83.45 83.45 83.45 83.45 83.44 83.43 83.41 83.41 83.42 83.43 83.40 83.40 83.40 83.42 83.43 33.44 83.45 83.46 83.47 83.49 83.50 83.52 83.54 83.57 83.63 83.66 83.67 83.65 83.68 Mar. 83.68 83.68 83.67 83.66 83.63 83.60 83.58 83.56 83.55 83.54 83.52 83.50 83.52 83.53 83.54 33.55 83.57 83.61 83.62 33.59 83.59 83.58 83.56 83.50 83.42 83.33 83.28 83.22 83.17 83.16 83.16 Apr. 83.16 33.14 83.13 83.14 83..17 83.17 83,17 83.19 83.21 83.21 83.22 83.25 83.25 83.26 83.26 83.26 83.26 83.30 83.32 83.33 83.34 83.35 83.36 83.36 83.35 83.36 83.38 83.39 33,39 83.40 May 83.40 83.42 83,43 83,52 83.53 83.53 83.53 83.53 83.55 83.59 83.61 83.64 83.68 83.73 83.75 83.75 83.75 83.75 83.76 83.79 83.79 83.30 83.82 83.32 83.84 83.84 83.35 83.86 83.85 83.85 83.85 June 83.36 83.87 83.36 83.84 33.82 83.33 83.33 83.36 83.37 83.38 83.91 83.90 83.^1 83.92 83.92 83.91 83.<»1 83.91 83.92 83.95 83.99 84.05 84.07 84.07 84,05 84.06 34.09 84.10 84,09 84.11 July 84.11 84.07 84.06 84.05 84.03 84.03 84.07 84.09 84.10 84.09 84.11 84.11 84.08 84.07 84.07 84.07 84.07 84.09 84.10 84.10 84.11 84.12 84.12 84.11 84.12 84.14 84.14 84.14 84.14 84.14 84.13 Aug. 84,13 84.13 84.14 84.19 84.16 84.13 84.13 84.13 84.12 84.10 84,09 84.04 83.99 84.95 83.92 83.90 83.36 83.86 £3.87 83.87 83.38 83.88 83.38 83.39 83,89 83.83 83.87 83.37 83.38 83.90 83.91 Sep. 83.38 83.84 83.34 83.81 83.79 83.77 83.75 83.72 83.68 83.64 83.59 83.56 83.53 83.50 83.49 83.47 83.46 83.45 83.43 83.40 83.36 83.32 83.29 83,25 83.21 83.17 83.14 83.10 83.07 83.04 Oct. 83.04 S3. 04 83.06 83.03 82.99 82.96 82.93 82.90 82.88 82.86 82.80 82.75 82.75 82.77 82.78 82.79 82.32 82.83 82.83 82.83 82.84 82.00 82.38 82.89 82.91 82.93 82.95 82.98 83.00 83.02 83.05 Nov. 83.07 83.09 ... .. Dec ... ... ... ... . ... .. ... ... ... ._, ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . . . . ... , Continued to ° APPENDIX 3. - Continued MEAN-DAILY-WATER LEVEL IN FEET BELOW LAND-SURFACE DATUM CALENDAR YEAR JANUARY 1973 TO DECEMBER 1973 Day Jan. Feb. Mar. Apr. May June July Aug. Sep. 1 2 3 4 5 6 7 6 9 10 11 12 13 14 15 16 17 13 19 20 21 22 23 24 25 26 27 28 29 30 31 84.50 84.49 84.45 84.45 84.45 84.47 84.48 84.51 84.53 84.55 84.56 84.57 84.61 84.68 84.71 84.73 84.75 84.77 84.80 84.32 84.33 84.34 84.35 84.87 84.39 84.91 84.92 84.94 ... ... 85.01 85.31 85.02 85.01 85.02 85.07 85.12 85.15 85.19 85.22 85.23 85.23 85.23 85.23 35.23 35.23 35.23 85.23 85.23 85.24 85.24 85.24 85.24 85.24 85.24 35.24 85.25 85.25 85.26 85.28 85.30 85.31 85.30 35.41 85.43 85.46 85.48 85.48 85.43 85.50 85.51 85.52 85.55 85.57 85.59 85.61 85.62 85,63 85,64 85.64 85.61 85.60 85.61 85.61 85.62 85.62 85.63 85.64 85.65 85.67 35.67 - 85.67 85.67 35.68 85.68 35.70 85.71 85.72 85.74 85,76 85.78 85.81 85.72 85.82 85.32 85.81 85.82 85.82 85.82 85.32 85.32 85.80 85.77 35.74 85.72 85.71 85.70 35.70 85.69 85.68 85.63 85.71 85.73 85.73 85.73 85.74 85.74 85.75 85.76 85.77 85.77 35.78 85.79 85.79 85.79 85.78 85.78 85.79 85.81 85.83 85.35 85.88 85. ?0 35.91 85.91 85.92 25.94 85.96 85.99 86.31 85,03 85.04 86.05 86.06 86.08 86.06 86.04 86.06 86.03 86.08 86.07 86.03 36.09 86.10 86.10 86.11 86-10 86.09 86.10 86.10 86.11 86.11 86.11 86.12 36.12 86.13 86.14 86.15 86.14 86.19 86.13 86.12 86.11 86.09 86.09 86.08 36.03 86.06 86.03 86.03 36.03 86.03 86.02 86.02 86.01 86.98 86.98 85.95 85.95 85.94 85.92 85.90 85.37 85.38 85.38 85.88 85.37 85.37 85.38 85.37 85.38 85.89 85.70 85.90 85.91 85.90 85.37 85.85 85.82 85.32 85.32 85.31 85.80 85.79 85.79 35.79 85.78 85.75 85.72_ 85.73 85.74 85.74 85.74 85.74 85.74 85.72 85.71 85.69 85.68 85.69 85.63 85.68 85.68 85.68 85.68 85.67 85.66 85.64 85.64 85.64 85.64 85.63 85.63 . ... ... - ... ... . 85.68 ... ... ... 85.94 85.95 85.94 85.94 85.94 85.94 85.95 85.95 85,96 85.96 S5. 9 7 85.98 85.98 85.99 86.00 86.00 86.01 85.01 36.02 86.02 36.03 86.04 86.04 86.05 86.05 86.06 86.07 RAINFALL. IN INCHES WATER LEVEL. IN FEET BELOW LAND-SURFACE DATUM O> 0» » OB -* -* 10 | O Ol O Ol O < Jan. - -- --- ---" Feb. Mar. - Apr. - May ......................................... July - Aug. " Sept. Oct. -- - - Dec. Jan. '" Feb. ' Mar. ' Apr. " June July ' Aug. Sept. Oct. - - - Nov. .---..---. --- - Dec. - --- Jan. "' Feb. ' - Mar. '" Apr. "' May £ June July ' Aug. - - ! Sept. - - -j- Oct ........... Jan. Feb. - Mar. - Apr. " ' " May " July ' " Aug. Sept. -- Oct. " - ""± Nov. ' ' Jan. - - reo. Mar. Apr. ' May " June JU|y - Aug. '" Sept. | > Oct. , f Nov. I D«c. ' W1 O O> 0» * N T\ T T jT/ * * i " " * * . ----------------------j-- ------------------- /^t ' \ *' 1 Q --_...-......... r .... B i.. . ....._.._....-....... s. fei ^- r <^ ' > ' j | ......-_.... .........__.___....S»-- ----- -----. i t> > * ** -..----......_....-.......__....._..._ -{ .......... ^ ' - * D 1 * s ' ^ ? --------------- --)--- ................... ........_...............^..... '" > s s . ) ..-_..._-..--...---..-- -.__-.......-_.. ,L-,^___ C ' 1: r ..-.....-..---.----......-__. ....... r .- j[ ....... 4 ....................... .........I!..... ......... i A 1 ^ C i 0> Ol 0) O « O o 0 ex 1 0 X 3 10 o3 ro ro APPENDIX 4. WATER LEVELS AT ADVENTURE WELL USGS NUMBER. 174303064484000, Local number 12. LOCATION, Lat 17 43' 08", long 64 48' 40". OWNER. U.S. Virgin Islands Government. *JAME. USGS-38 CEstate Adventur*}. AQUIFER. Limey sediments of Tertiary and Quaternary Age. WELL CHARACTERISTICS. Orilled unused water-table well* diameter 4-in, cased 0-50 ft, perforated 30-50 ft, open hole 50-97 ft Cnour plugged at 46.8 ft3 DATUM. Altitude of Isd is 30 ft above mean sea level. MEASURING POINT. Top of shelter floor, mhich is about 0.6 ft above Isd. REMARKS. Recorder and observation uiell. Affected by nearby pumpage. PERIOD OF RECORD. Water levels: 1966 - 69, Sept. 1970-73 Cdiscontinuedl. EXTREMES FOR PERIOD OF RECORD. Highest water level 14.40 ft above Isd, Nov. 29, 1971; lowest mater level , dry Ttsjell plugged at 46.8 ft3. WATER LEVEL, IN FEET 8ELOW LAND-SURFACE DATUM, SEPTEMBER 1970 TO DECEMBER 1971 INSTANTANEOUS OBSERVATIONS Date Sep 29, 1970 Nov. 5 Dec. 1 Oec. 31 Jan. 29, 1971 Feb. 25 a Pulping. Continued Water level 19.80 17.06 18.67 17.11 17.31 17.30 Date Mar. Mar. May June Aug. 4, 1971 31 3 3 4 Water level 21.60 22.04 13.38 a46.57 a44.97 Date Sept. Sept. Oct. Nov. Dec. 2, 1971 30^ 29 29 30 Water level a45.33 a43.37 a43.26 14.40 15.03 APPENDIX 4. - Continued MEAN-DAILY-WATER LEVEL IN FEET BELOW LAND-SUFACE DATUM CALEMDAR YEA* JANUARY 1972 TO DECEMBER 1972 lar« Apr. May June July Aug. Sep. Oct, 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 23 29 30 31 15.07 15.11 15.15 15.16 15.19 1S.20 15.21 15.33 15.32 15.36 15.40 15.42 15.42 15.45 15.51 15.50 15.46 15.49 15.42 15.45 15.46 15.47 15.51 15.53 15.53 15.52 15.55 15.58 15.56 15.59 15.55 15.55 15.63 15.70 15.73 15.74 15.78 15.83 15.39 15.93 15.99 16.00 16.05 16.08 16.12 16.15 16.17 16.20 16.25 16.30 16.35 16.39 16.43 16.49 16.52 16.56 16.60 16.25 16.62 16.60 « _ __ 16.55 16.40 16.21 16.15 16.12 16.12 16.13 16.13 16.16 16.16 16.17 16.20 16.22 16.25 16.30 16.33 16.37 16.40 16.43 16.49 16.51 16.51 16.52 16.52 16.46 16.36 16.63 16.19 16.18 16.19 16.21 16.23 16.27 16.30 16.13 16.37 16.37 16.38 16.42 16.46 16.50 16.51 16.52 16.56 16.59 16.61 16.63 16.70 16.75 16.73 16.31 16.36 16.89 16.93 16.95 17.00 17.03 17.10 17.14 17.20 17.23 17.27 17.29 17.35 17. 40 17.45 17.52 17.55 17.63 17.59 17.72 17.79 17. S3 17.87 17.93 17.98 18.03 13.10 17.19 18.27 18.35 13.45 13.52 18.70 18.73 13.76 18.80 18.81 18.83 18.85 13.87 13.90 Continued ro CO 23.70 23.66 23.65 23.60 23.30 23.33 22.90 23.22 23.25 23.15 23.03 22.98 22.95 23.00 22.30 22.37 22.90 22.92 22.95 22.96 22.99 23.01 23.02 23.05 23.08 23.10 23.12 23.13 APPENDIX 4. - Continued MEAN-DAILY-WATER LEVEL IN FEET BELOW LAND-SURFACE DATUM CALENDAR YEAR JANUARY 1973 TO DECEMBER 1973 July Aug. 1 2 3 4 5 6 7 3 9 10 't1 12 13 r^r 15 16 17 13 19 20 21 22 23 24 25 26 27 28 29 30 31 23.16 23.20 23.21 23.20 23.15 23.19 23.25 23.24 23.20 23.26 23.28 23.27 22.98 23.26 23.18 23.24 22.98 23.47 23.38 23.39 23.40 23.44 23.46 23.46 23.51 23.53 23.57 23.63 23.69 23.73 23.77 23.80 23.82 23.38 23.90 23.95 23.97 24.11 24.10 24.10 24.11 24.12 24.17 24.18 24.20 24.15 24.14 24.18 24.30 24.30 23.40 23.90 24.22 24.33 24.40 24.41 24.43 24.46 24.55 24.75 24.76 24.77 24.77 24.78 24.81 24.85 24.85 24.90 24.93 24.00 23.30 25.05 24.50 25.01 25.05 25.13 25.15 25.15 25.16 25.21 25.23 25.28 25.30 25.30 25.31 25.33 25.37 25.42 25.46 25.47 25.48 25.50 25.53 25.70 25.71 25.76 25.30 25.85 25.33 25.90 96.00 25.90 25.96 26.00 26.02 26.05 26.09 26.12 26.13 26.20 26.25 26.30 26.30 26.35 26.39 26.42 26.45 26.50 25.80 26.45 26.40 . - _. 25.30 - - - -.- . ~ 27.65 27.75 27.30 27.85 ?7.39 27.90 27.94 27.98 27.99 23.05 28.10 23.13 23. TT 23.19 23.19 23.20 23.28 23.30 23.34 23.37 28.40 28.42 23.47 28.50 28.51 28.56 28.58 28.60 23.62 23.61 28.68 23.63 28.55 23.50 23.55 28.59 28.60 23.65 23.72 28.08 28.76 28.30 2«.ST 23.83 28.88 23.92 29.03 29.22 29.60 30.13 30.22 29.39 30.60 31.00 31.15 31.25 31.43 31.56 31.68 31.75 30.30 _. . . 23.75 - ___ . H - _-_ . 29.79 30.51 29.80 29.80 29.80 29.70 29.60 29.65 ,. 23.75 28.95 30.60 30.60 30.60 30.60 30.60 3 30.70 30.70 30.70 30.70 30.70 30.72 30.75 30.75 30.75 30.75 30.75 30.80 31.00 31.00 31.00 31.00 30.95 31.00 31.02 30.07 31.10 31.15 29.75 31.21 31.23 5O.95 31.08 31.17 31.20 31.20 31.25 31.30 31.30 31.33 31.00 30.82 30.93 31.01 31.12 31.20 31.28 31.38 31.50 31.60 31.67 31.70 31.77 31.77 31.78 31.77 31.80 31.82 31.20 31.89 31.90 M.95 31.97 31.99 32.00 32.01 32.03 32.07 32.08 32.10 32.12 32.16 32.18 32.21 32.23 32.26 32.28 32.29 32.36 WATER LEVEL. IN FEET BELOW LAND-SURFACE DATUM <Oc * <D 0) 00 < + <D * 5" < <D ST 00 <D 3 « * C ^ <D ^ O 10 APPENDIX 5. WATER LEVELS AT BARREN SPOT WELL USGS NUMBER. 174316064453800. Local number 8. LOCATION. Lat 17 43* 16", long 64 45* 38". OWNER. U.S. Virgin Islands Government. MAflE. Barren Spot 7 well. AQUIFER. Limey sediments of Tertiary and Quaternary Age. HELL CHARACTERISTICS. Drilled Water-table production well, cased 0-115 ft, perforated 55-115 ft, open hole 115-140 diameter 6-in., ft. Depth 140 ft. DATUM. Altitude 1-in hole in of Isd is 60 ft above mean sea level concrete pump base, which is about 1 Measuring 9 ft above point: Isd. REMARKS. Recorder PERIOD OF RECORD. (discontinued). EXTREMES FOR PERIOD Oct. 22, 1962; and observation veil. Water levels: Nov. 1962 to Oct. 1964, Nov. 1970 - 73 OF RECORD. Highest water level 50.10 ft below Isd, lowest water level a67.25 ft below Isd, Dec. 5, 1973. Date Nov. 3ec. Dec. Jan. Feb. Har. ^ar. May June July Aug. Sept. 5, 1 31 29, 25 4 31 3 3 1 3 2 Water lev el 1970 59.38 a65.59 a64.45 1971 a64.91 a62.35 a62.35 a63.41 a63.38 a62.25 a57.32 a61.10 a61.15 WATER LEVEL, IN FEET 3ELOW LAND-SUFACE DATUM, NOVEMBER 1970 TO DECEMBER 1973 OBSERVATIONS Water level Date Nov. 29, Dec. 30 Feb. 1, Feb. 29, May 1 May 31 June 30 Aug. 1 Sept. 1 Oct. 3 Nov. 2 Dec. 4 1971 a64.90 a64.54 1972 a64.65 1972 a64.-18 a66.17 a5°.01 a63.80 a63.70 a67.13 a63.99 a64.12 a64.98 Date Jan. Feb. Mar. May June July Aug. Sept. Oct. Nov. Dec. 4, 1 1 1 1 5 1 6 4 5 5 Water level 1973 a63.55 a58. 59 a63.21 a63.00 a62.30 a60.70 a62.34 a62.33 a66.65 a65.47 a67.25 a Pumping. WATER LEVEL. IN FEET BELOW LAND-SUflFACE DATUM it*o IDc O a <* o n Oc 4> 05 3 O. CD 05 n n O3 CO o o <D H O CD -M W fO 00 APPENDIX 6. WATER LEVELS AT RIVER GUT WELL USGS NUMBER. 174221054470500. Local number LOCATION. Lat 17 42' 21", long 64 47' 05". OWNER. U.S. Virgin Islands Government. NAME. River Gut well. DATUM. Altitude of Isd is about 55 ft MEASURING POINT. 3/4-in bronze nipple above Isd. REMARKS. Observation well. PERIOD OF RECORD. 4atar levels Cdiscontinuedl. EXTREMES FOR PERIOD OF RECORD. Fab. 25, 1971; lowest water above mean sea level, on pump concrete base, which is 2.6 ft Nov. 1970 - Dec. 1971, Jan. 1973 - Dec. 1973 highest mater lavsl 16.60 ft below Isd, level a43.50 ft below Isd, June 1, 1973, WATER LEVEL, IN FEET 3ELOW LAND-SURFACE DATUM, NOVEMBER 1970 INSTANTANEOUS OBSERVATIONS DECEMBER 1973 uaie waTer uaie level No v . Oac . Oec. Jan. ^=eb. Mar. Mar, May June July 5, 1970 1 31 29, 1971 25 4 31 3 3 1 17, 18. 17. 17. 16. 17. 22. 18. a46. a47. 06 67 11 31 60 30 04 88 51 95 Aug. Sep. Seo. Oct. Nov. Oec. Jan. Feb. Mar. 4, 2 30 29 2 4 4, 1 1 1971 1^73 waxer level a44.97 a45.33 a43.37 a43.26 17.68 13.54 a45.20 a43.43 a43.33 uate Apr. May June July Aug. Sep. Oct. Nov. Dec. 3, 1973 1 1 5 1 6 4 5 5 water level a43.55 a45.70 a48.50 a47.10 a44.8Q a47.11 19.17 21.26 17.73 a Pumping.