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Mississippi Geology – Volume 17, Number 2

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Mississippi Geology – Volume 17, Number 2 THE DEPARTMENT OF ENVIRONMENTAL QUALITY Office of Geology P. 0. Box 20307 Volume 17, Number 2 Jackson, Mississippi 39289-1307 June 1996 ENGINEERING GEOLOGICAL GEOGRAPHICAL INFORMATION SYSTEM OF THEWATERWA YS EXPERIMENT STATION William L. Murphy and Paul E. Albertson Geotechnical Laboratory U.S. Army Engineer Waterways Experiment Station Vicksburg, MS 39180 ABSTRACT Hydraulics Laboratory, thelnfommtionTechnology Labora­ tory, and the Structures Laboratory, occupies 680 acres in Engineering geological data pertaining to the Waterways Ex­ Vicksburg, Mississippi. The authors, assigned to the WES periment Station (WES) were compiled into digital format for Geotechnical Laboratory, were requested to compile the incorporationintoacomputer-basedgeographicalinformation existing engineering geological information and enterit into system (GIS). Data wereprimarily fromboringsdrilledat WES a format usable by a GIS. The primary end user of the for groWldwater resources or construction projects. Logs of geotechnicalinfonnationisthefacility'sDirectorateofPub­ borings in the central Warren County, Mississippi, area also lic Works, Engineering and Construction Services Division. provided geological information. Maps and geological pro­ The useofGIS technology for installation management files of mappable geologic units at WES were prepared from in the Department of Defense is becoming more prevalent. the data. The GIS will make geological and engineering data Geological and geotechnical information ofan installation is readily available to anyone planning or conducting construc­ in creasing! y critical in an age of environmental concerns, as tion, testing or groWldwaterresourceactivities in the immedi­ well as in the traditional areas of design and construction. To ate vicinity ofWES. address these issues, GIS technology gives the manager the ability to study scenarios quickly and efficiently through the BACKGROUND use of spatial querie-s and analyses that relate disparate data. WES is the principalresearc~ testing, and development PURPOSE facility ofthe U.S. Army Corps ofEngineers. Its complexof six laboratories, the Coastal Engineering Research Center, the The goal ofthe original work was to compile geological Environmental Laboratory, the Geotechnical Laboratory, the and other data into digital format for incorporation into an ~fl_ ::-,. II /I .. ll N 26 /,;.-~ - 1\ ~:. · ./V 27 28 29 7 WW-1 ~ _, / /' ~ '~ 7 !-\ ;;,}) ~ \ ~J a • • IF In\ ./v t ~ 100 ~;: ~ ~ ~ J iY 22 tl; 23 25 \0 !y_ p V I 1'- 241/ v /t:= ~ ,./ ~ ,f. / ~ -- ~ cfi;!., - .~ 1\ A « ~ -~ -- /) ~ 0 '3 ~L~ I.J. / I"!"" i' J) ~ f- 17 I !8 ~ .J 19 / rN. _j@ i II 20 I" 0 21 .. 7 - __.,. ; . ~ ~ + ,... "\J ~ ~w :;?\: :::> )i'i"Dl \( ... ~ ; { ,_ .:;:: \ 81 :::::. .• LJ l V-1 !] I .._ 12 13 I H 15 - - ..? \ ~ ~ ~ ' -· 16 " .....( '( 't\~ /" il:::i~::::: 1 t ~?: -r· tt ~ 1- ~ ~ '\ l. I - l l,..l.! ~ \ ~ I). \ 17 r~ r ~ ] ~ 10 ~ I 8 11 ~ " :J A - - hi~;:} v ~ If.._ 1."1\ - I" 0 \ tJj ~ ~ II ~ ~ l:f.; c ., , \ 11 ~ ill 1<\ t ~ v 5 '~ ~ ~ ~ ' [..,ltr 6 7 ~ = .2 ~ -? ~ ~ .$ ~ ri ~ - - WGC-1 ·~ ~ t;! ~ u Lr1 I I I I ~ ~ ,~;, WW-C I 2 -~ " 3~ ,......!- ,. ~ "=' ~v 1 - Figure 1. General plan of the Waterways Experiment Station and location of geologic profile of Figure 2. installation management GIS. The objectiveofthestudywas or anomalous to the geology surrounding WES. Engineering to make the geotechnical information readily available to and construction (geotechnical) characteristics ofthe geologi­ anyone planning or conducting construction or testing activi­ cal materials described in this work are emphasized. How­ ties at WES, in the form of digital data and as interpreted ever, sufficient detail of stratigraphic and stmctural relation­ vertical cross sections and maps of selected geological hori­ ships ofthe mappedgeologicunits is presented to demonstrate zons. The purpose of the present paper is to share to a wider thevariabilityin properties that can be expected in the vicinity geological community the methods and results of our in­ ofWES. housework. It was not the intent of the authors to reinterpret the GEOTECHNICAL INFORMATION AND ANALYSIS geology of the Vicksburg or Warren County area. The authors relied heavily on existing geological literature de­ The authors collected, analyzed, and processed the avail­ scribing the local and regional geology, supplementing it with able geological and engineering data pertaining to WES and newly acquired data from recent boring pro grants at and in the vicinity to provide geotechnical information for a facility GIS immediate vicinity ofWES. The chiefpurpose ofreviewing bemg developed by the WES Tri-Service CADD/GlS Center. the local and regional geology was to determine whether A large amount of geotechnical data for the facility and interpretationsofthegeology at WES were conformable with surrounding areas has accumulated from WES and county- 26 MISSISSIPPI GEOLOGY, V. 17, No.2, JUNE 1996 •rno S.Ctton I -... ... ... ... ... ... .. ... ..•• .. .. 10 ... FOREST MILL ... ... .... .-... .... YAZOO CUY .. .. .. ~Ill lt"'. S(AL( a L._30 rt -IZONTAI. SCAl[a ~rT .... .... V.(. • 15 fO 1 .... Figure 2. Vertical profile through four deep borings at WES, howing geologic units and E-logs. wide activities but had not previously been compiled and borings were extracted in Mississippi State Plane coordinates portrayed. The authors also attempted to combine and corre­ (NAD 27, Mississippi West Zone) from original source maps late data from individual borings and other data sources into orfromsurveydata BoringsoutsideofWES forwhicbthere a comprehensive, three-4mensional intetprctatioo ofthe sur­ were no swvey data were spotted on USGS topographic faceand subsurface conditions at WES. The procedures used quadrangle base maps using available infonnation ( construc­ to accomplish this effort are applicable to any facility wishing tion maps or section, township and range designations) and to incorporate geology andgeoteclmical data into a GIS. The then castings and northlngs extracted from the base maps. geological and engineering data compiled and the resulting Each boring log was examined to obtain elevations of Ute maps and tables are site- or area-speci fie. geological contacts listed below. The geological contacts, or "picks," are based on the authors' experience and on compari­ DATA COLLECTION son with the type section electrical resistivity/SP log (E-Iog), Boring J2, at Mint Spring Bayou. Vicksburg (Mississippi Data sources in cluded foundation borings for structures Geological Survey, 1964). Figure 3 shows Ule type section E­ log, boring J2, and Figure4 the E-logsection at WES in boring on the WES installation, water and monitoring wells at WES V-1. and in the Vicksburg area of Warren County, and existing geotechnical literature. Figure I shows the generaJ plan of Many boring logs provided an elevation for the ground WES and the location of the geologic profile presented in surface at the boring location. However, the elevations of top Flgure2. Figurc2 is a vertical profile U1rough four borings at of ground for some of the borings and wens were estimated WES showing the geologic units depicted and the associated from topographic contour maps. Therefore, the elevations E-log signatures for each boring. A total of92 1ogsofborings depicted on Ut e geologic surface maps arc presumed to be and wells was examined Tbedataset was first compiled in a accurate to +/- 10 n. spreadsbcetfonnat. Theeastings(X)andnorthings(Y)ofthe MISSISSIPPI GEOLOGY, V. 17, No. 2, J UN E 1996 27 SPONTANEOUS POTENTIAL II'OtTMCCM fi'OTtJrfr.u.. ti[JISfMIX 10 . ......... .... I 10 c:r--· ~ · F" ··-·· 1-1-1- 1-I-a- I-t-t- 1-t-··- -F:: ---=t; 1- I.Cts. 1-1-- I-t- r--.. 00 l-t-+-H 14-:s H-!-t-1- [}_ t-H - - r-r-1- 1- t--t-in-++-i c:::,. a- t- t- -t-t- - -t-+-t..,:.io;-jl-+~ r-;~,s·~'=rl-;-t-t:l81--t:-iA - uk4 i- 1 t- 1-I - - t--t·-t-1--t-+-15~-!ti-+-;t-i I I ~-r~~~~-r+~~di~~ · ~P+~~-r~'~4-~~ ~ ..... I I t- - ~- -l-t--tiL·.rt-~r+~ t-t- ·- - !""" '== ~-· i--t--+.,_1-+-+-1 T- ~ + t± 8 A rf-'-- 1- · -- ··<t-J-r--t-1-1 -1-f- . 1-t--. .lf. 1_ I ~~-~~- 1 ~ 1..- a- -! 1:::: I .J. ± L-i- -1 [""; ,_ Cl _N ~ ~-- - t- 1 I I _L I '-! ... t-F I T + -.br-=1-' T r- ~ r- ..._ T -J-1-- + -::.~~ -- i- +· + -,- ~ f'>!fi ~ - ! r+-- r _L r I r- rr I - l't I + · 1 t -!~ "\ - j I i l -~- - T bJ - 1-1! ~~ ~; I I I ~ I I -~ I '"" I I I I r-t-:-h_ r -r- • ·~ t-t~...C-N--+~H---1-.._...~ I I ~ ~ 1 --< -~4- l - j{"!--' .J. -~~t t--l- - I/ -J- - r-rt· t- -t-~ f:!! !.1!-Jl.f= i _j_ 1- -- ~ ~· + -- r:-; ~- -f-+-. -~ f - 1 1-r--,:r,:- -Hi-+--H-++-1~ t-t-H . 1.. ""' --H- t- · JL -+-j-H- -+- -1-- n r- J-1-t ,-,-11r -j- 1-, -j- +­ t±~- - -H- 1- -r- -+ H- ... tl ~J H -H-+= ~-f-- - H- -- ?- +rl- 1-1-tf[ '+ +-1- t t -~- ~-h ;~ ~-: ·t[i _- ·- -- ~ ~~- ·+ -~ H +- -1 -lt- ~ .l - -', + I- - ~~ -1---t- +~+ - ± -i-r-t-= r:-J - ~~ -r-tt _ ~ - i Y~[) +.:r -t -1--r-l---F' -1-± h~~-±±-~ 1- .......;_ Figure 3. Electrical log (E-Iog) of boring J2 near type section of Vicksburg Group, Vicksburg, Mississippi. Figure 4. Electrical log (E-Iog) of boring V -1, WES, (After Mississip11i Geological Survey, 1964.) Vicksburg, Mississippi. DATA PROCESSING AND ANALYSIS representationsofthe boring logs, and an ASCll fiJe that would allow transfer of the data to the lntergraph program lNSITU. After t11e boring. water well, and monitoring well logs The graphical output of selected borings is in a MicroStation were compiled and reviewed by the authors for pertinent DGN fonnat file. Tltis file can be viewed and plotted using infom1ation, geotechnical data were entered into the PC­ MicroStation. LNSITU is a boring data storage and retrieval based database, Boring Log Data Manager (BLDM). The program that allowstheuserthree-dimensional(3 D) capabili­ BLDM (Nash. 1992) was used because of its ease of use and ties in plotting and defming surfaces of contacts between soil the ability to create documents in report fom1at.
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