HomeMy WebLinkAboutSUB200600058 Review Comments 2007-08-15 08/21/2007 08: 08 4349793759 VDOT PAGE 02/04
VIRGINIA DEPARTMENT OF TRANSPORTATION
INTRA-DEPARTMENTAL MEMORANDUM
August 15, 2007
MEMORANDUM TO: Mr.A. a Sumpter
ATTENTION: Mr,C.'T. Babcr
FROM: Scan C.Nelson
SUBJECT: CI3R Tests& Pavement Design
South Fork Farms, Phase 4
Sycamore Creek Drive
Sycamore Creek Circle
Albemarle County
In response to your 7-27-07 memorandum,t have reviewed the eleven(11)CBR tests submitted for the above
roadways in Phase 4 of South Fork Farms Subdivision. Based on the review the tests appear to have been
performed in a satisfactory manner.
Also, t have reviewed the proposed pavement design for Sycamore Creek Drive and Sycamore Creek Circle.
Based on the anticipated traffic from Phase 4 of South Fork Farms Subdivision the planned pavement design of
2.0"SM-9.5A and 6"of Aggregate Base Material,Type I,size 21-A is adequate. A recommendation of.20
gal/yd2 of MC-30 prime coating should be used before the surface course is applied.
Should you have any questions please contact me at 540-829-7582.
Sean C. Nelson
Culpeper District Pavement Engineer
Re,CEW ED
REsalENC:Y �L1.s.VA
l i1 f1V'44A-CT °
08/21/2007 08:08 4349793759 VDOT PAGE 03/04
Ph.asc 4 South Fork Farms Subdivision
Sycamore Crcck Drive
Sycamore Creek Circle
# of total Lots 17
VPD per planned lots= 170
Design CBR per submitted results= 10.4
Required Thickness Index =7.2
Actual Design.Thickness Index =9.34
The Pavement Design submitted is sufficient for the estimated traffic and soil conditions.
08/21/2007 08:08 4349793759 VDOT PAGE 04/04
;OIL$u0vhV 13421,0 DATA
MAX ESTIMATE( POCIAET
.. AABHTO OPT DRY RESLIENT3ENETROMETL1-
;AMPLE LAB lb 1 MOIST DEN; WEIGHT WE)GHTgp Rr$ILIr,wC'MODULUS BEARING
10. PICLD:AIL DPSCAIRTIQN CLAoo 414 -42M1 L.L. R.I. ISO (phi C.B.R.OCCURISANCE9 FACTOR C.B.R. FACTOR )pal) (T.B.F.)
1 SVCAMORP CRC),Ic DAIV[.STA.10+50(Mown$tody tilt) 90.7 37.7 32.9 4 IT.7 NM,. 14/ I 0,3900 1.3104 17?'14
2 SYCAMORE CREEK DRIVE ETA.15.50(Brown EOndy 3110 A1.7 23.3 222 15 11.3 118.5 28.3 1 0.0000 2.31108 20000
n SYCAMORE CREEK DRIVE STA.20*00(Red Sandy SAg 99.o 5E4 08.4 3.0 24.3 35.7 MO1 0.0900 1.0030 15000
4 4YCAMORF CHFFI(DRIVE STA.25+50(Red Sandy SAE) 34.5 32.1 30 3.2 17.0 101.0 1U.1 1 0.0909 0.9127 'I0000
SYCAMORE CREEK DRIVE.STA.30.5U(Rod$rndy$All p4.0 51.0 a2A Il 13 MO0d 1 0,001I 9SAI,la l 1l2Il
0 SYCAMORE CREEK DRIVE ETA.35•50(Find Bendy BIE 100.0 45.1 37 8 4.4 am01.0 13.7 1 0.2000 1.1455 10441
7 SYCAMORE CREEK DRIVE STA.40.50(Red Bondy 91111 100.0 052 33.1 2.4 215 09.3 14.2 1 0.0909 1.290o 151100
e SYCAMORE CREEK DRIVE STA.45400(Red Cklyey SILL) 100.0 07.4 35.4 0 20.0 93.3 23.7 1 00900 2.1040 10000
A SYCAMORE CREEI8 DRNC STA,411,21(Rod Clayey SIR) Imo 02.4 32.0 2.4 23.9 93,0 10.7 1 0.0909 1.3354 1a000
to SYCAMORE CREEK CIRCLE STA.12.00(Rod 3440yVII) 100,0 133,9 266 5 21.6 ASA 14,0 1 O.0964 1.3455 11536
'I I SYCAMORE CREEK CIRCLE ETA.16.01(Roll Sanity:.Al) A3.9 00,1 30 7 21 2 140,4 12,2 1 (OW, 1.1081 19p011
12
12
TOTALS. II 1,00191 1A 0:104 AIERAGO, inn 1n
C.V.of Rn94118nl MOduAf MCI: 10.0
MINIMUM CBR: 0.7
MAXIMUM CBR: 20.3
AVERAGE COP' 0.6
AVERAGE CBR(Excluding M0li E.loW 001u1e): 15.5
DCCURRANCE W EIGIITED CBR: 15.11
DESIGN CBR: 13,4
AVERAGE RESILIENCY FACTOR: 1.0
SOIL SUPPORT VALUE(EXV): 10.4
DESIGN RESILIENT MODULUS. 15010 psi