Agenda - Public Works Committee - 04/16/2024

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0SE I&IMMAIM"; ON MM RVI C FIS P11 47 0 1 q 'r F 7 tip, A 0 Standard D 2487 - 00 Classification of Soils for Engineering Purposes (Unified Soil Classification System) Criteria for Assigning Group Symbols and Soils Classification----------- Group Group Names Using Laboratory Tests a Symbol Group Name b 0 Gravels Clean Gravels Cu L- 4 and 1 = Ct ,- 3 GW Well -graded gravel" 0 More )0% of cci fraction 5% or less fires C- 4 and/or 1 �' C' �' 3 GP Poorly graded gravel" 'n 0 > retained on Gravels with Fines Fines classify as ML or MH GM Silly gravel Na. 4 steve More than 12% fines Fines classify as CL or CH GC Clayey gravel ----------- ..... .. — --- ----- rn i Sands Clean Sands Ci, > 6 arid 1 �! C� :_ 3 SW [ Well graded sand 6 50% or more of 5% or less fides C < 6 and/or I > Cc > 3 SP Poorly graded sand 0 ID coarse fraction passes Sands with Fines Fines classify as ML or MH SM Silty sand 'O' No. 4 sieve More than 12% � �,s cl; Fin( assfy as CL or CIL Sc -, i, Clayey sand f G) Inorganic .- Pit > 7 and plots on or above "A" line CL [,Part I Silts and Clays y lot < 4 or plots below "A' inn IVIL silt Liquid hrrit > 22 less than 50 Organrc Liquid lunt, oven dried < 075 OL Organic clay - --- - ------ Liquid limit - not dried OL Orgarl silt 0 (1 Silts and clays Inorganic PI plots on or above "A' line CH__ PI plots below'A' line MH Elastic silt Z Liquid lifirrit Organic Liquid limit - oven dried < 0 75 CH rg 0 anic clay 50 or more Liquid iinnit - not dried OH Organic silt Highly Organic Soils, Primarily organic matter, dark incolor and organic odor PT I Peat a Basedunthe material passing rhea-in%75mn1) sieve b If field sample contarred cobbles or boulders, or both acid with cobbles or bouiders, or bath- to group nanic (_'i, DIc C, X D, d If soil cont-ains`�O 5%, and add 'with sand" to group name. e Gravels wth 5 to 12% fines, require dua6 symbols GW GIVI weil-giaded gravel with sift GVV GC well -graded gravel with clay GP -GM voony graded gravel %vith sift Got' -GC poorly glided gravel w&,'fliy f. if fines classify as CL-WiL, use duar symbol GC -GM or SC-SM. g Iffines are cirganic add`with organic fines' r0group riarner in if soil contains � 15'X, gravel, add "with gravelF to group name Sands wikh i to 12% fines require dual symbels SW-SIM wrelkgrsdedsand wlths:]i SW -SC well -graded sand with clay, SP-SM poorly graded sand wilh silt poorly graidifird sand with clay i If Ainpri limits l in hatched area. soil is a CL-PAL s,ity dat k lfsoiicotitgt.,,s"(Jto29%pl,-sNo.200 add I lfsoil conlalns30% plus No. 200 predominani add sarri Wgrout mame nr 200 predorrinantly gravel. add gravelly Wgiaupnarne n PI 2� 4 and plaits on or above 'A hire o, Pt < .1 or p:cts below A' line i Pi plots on or above 'A'line q P I p to t ri e e 1ovv A' 11 n, 60 50 40 X ar 30 20 ra - 10 7 4 0 C 14Z W� . . ......... CIV MH or OH 1 or CIL 7" 10 16 20 30 40 50 60 70 80 90 100 110 Liquid Limit (LL) Laboratory Tests DD Dry density, pcf Oc Organic content, '/, WD Wet density, pcf S Percent of saturation, % MC Natural MOIStUre, content, % SG Specific gravity LL Liqluid Iwvt, lr6 C Cohesion, psf PIL Plastic limit % 0 Angle of mtei naafi friction Fit Plasticity index. % qu Unconfined compressive strength, pst P200 % passing 200 sieve qP Pockel penetrometer strength, tsf Particle Size Identification Boulders. .. ... ... ...... .. over 12" Cobbles . .. ... ... ......... 3" to 12'' Gravel Coarse . .. .. ... ............ 3/4" to 3' Fine .. . .. . . No 4 to 3/4' Sand Coarse . ...... No 4 to No. 10 Medium No 10 to No 40 Fine ..... .. No. 40 to No. 200 Silt ..... .. .. ... .. .... _ ......... - No. 200, Pl< 4 or below "A' line Clay < No. 200, Pl> 4 and on or above "A" line Relative Density of Cohesionless Soils Very loose ..., 0 to 4 BPF Loose. .. ...... 5 to 10 BPF Medium dense .. ... .. ..... . ..... 11 to 30 BPF Dense 31 to 50 BPF Very dense ...... over 50 BPF Consistency of Cohesive Soils Very soft .... . ....... .... ....... .... 0 to I BPF Soft 2 to 3 BPF Rather soft ...... ....... .......... 4 to 5 BPF Medium 6 to 8 BPF Rather stiff .. .. . ... 9 to 12 BPF Stiff .. ... ... .... . ..... 13 to 16 BPF Very stiff ........ 17 to 30 BPF Hard over 30 BPF Drilling Notes Standard penetration test borings were advanced by 3 114' or 6 1/4" ID hollow stern augers unless nated otherwise. Jetting water was used to clean out auger prior to sampling only where indicated on logs. Standard penetration test borings are designated by the prefix "ST' (Split Tube). All sarl were taken with the standard 2" OD split -tube sampler. except where noted Power auger borings were advanced by 4 or 6" diameter continuous - flight, solid -stem augers. Soil classifications and strata depths were in- ferred from disturbed samples angered to the surface and are, therefore. somewhat approximate Power auger borings arc-, designated by the prefix "B." Hand auger borings were advanced manually with a 1 1/2' or 3 1/4" diameter auger and were hinted to the depth from which the auger could be manually withdrawn, Hind auger bot-Ingiri are indicated by the prefix BPF: Numbers indicate blows per foot recorded in standard penetration test, also known as "N value. Rio sampler was set 6" into undisturbed sell below the hollow -stern anger Driving resistances were then counted for second and third 6' incrernents and added to get BPF Where they offered significantly they are reported in the following farm: 2/12 for the second and third 6' increments respectively WH: WH indicates the sampler penetrated sell under weight of hamrnej and gods alone: driving not required, I WF: VVR indicates the sampler penetrated Sell under weight of rods acne; hammer weight and driving not required, TVV Indicates thin -walled (undisturbed) tube sai Note, Alt tests were Cut) in general accordance with applicable. AS TM standards. i 71G7