C04c Attachment 3 Drawings BSC 1240BH26R0013.pdf
PDF 4 MB Posted
- Solicitation number
- 1240BH26R0013
- Issued by
-
Department of Agriculture Forest Service
About this file
This document is a set of construction design plans for the Blanchard Springs Caverns Tunnel Rehabilitation project located in the Ozark-St. Francis National Forest, Sylamore Ranger District, in Arkansas. The plans were prepared by Golder Associates and issued for bid, detailing the rehabilitation of existing cave entrances and the construction of a bypass tunnel system. The project encompasses multiple components including the Dripstone Cave entrance outer and inner airlock doors, Dripstone Cave exit outer and inner airlock doors, Dripstone Cave exit security doors, Discovery Cave exit outer and inner airlock doors, Discovery Cave exit security doors, a Dripstone Cave bypass tunnel with associated plan and section views, and a sinkhole infill detail. The plans include 15 sheets covering detailed architectural and structural designs for rockbolts, shotcrete shell details, door specifications and installation, drainage systems, utility placements, and construction sequencing.
The rehabilitation work involves installing new security and airlock door systems at multiple cave entrances, constructing a bypass tunnel around the Dripstone Cave to protect sensitive formations, implementing comprehensive ground support measures including rockbolts and shotcrete reinforcement, and managing surface water through stormwater diversion berms and sinkhole infilling. Key specifications include 6-foot-long fully resin-grouted threaded rebar rockbolts on maximum 4-foot centers at entrance and exit areas, standard aluminum framed full-view balanced doors with stainless steel hardware, fiber-reinforced plastic reinforced shotcrete shells, and concrete curbs for door installations. The design incorporates geotechnical monitoring provisions including crack gauges and mechanical telltales to track structural movement during and after construction.
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Text version
I I I
Ill
TO CAVE
INTERFACE
AND
ORIPSTONE
EXIT
ffi Iii
-4,-...,t,.\\�� z�
CRACK GAUGE (APPROX. LOCATION. SEE NOTE 41
SHAFT TO
SURFACE
SCALE 1-.15•
MECHANICAL TELL T,
(APPROX. LOCA Tl
CRACK GAUGE {APPROX.
LOCATION. SEE NOTE 41
IECHANICAL TELLTALES_(APPROX. L
.l_l,l' l
2<M+60 2+50 2+40 2+30 2+20 2+10 2+00 1+90 1+80 1+70 1+eo 1•50 1♦40 1♦30 1+20 1+10 1+00 0♦90 0♦80 0♦70 0+60 0♦50
STATION
SCALE 1._1s'(A-A') DRIPSTONE CAVE BYPASS - PROFILE VIEW
C-42 LOOKING NORTHEAST
NOTE(SI
1. FIRST TWO ROWS OF ROCKBOLTS AT ENTRANCE AND EXIT TO DRIPSTONE CAVE BYPASS
TUNNEL, AS WELL AS ADJACENT SHAFT TO SURFACE, SHALL BE SFT•LONG, 15 FULLY
RESIN GROUTED THREADED REBAR ROCKBOL TS ON MAX 4FT CENTERS.
2. REMAINING ROCKl!OLTS SHALL BE 6FT-LONG, IS FULLY RESIN GROUTED THREADED REBAR ROCl<BOLTS ON MAX 4FT CENTERS.
3. LOCATION AND THICl<NESS OF GEOLOGIC UNITS SHOWN AAE APPROXIMATE AND IS
BASED ON UNDERGROUND OBSERVATIONS.
4. INSTALL CRACK GAUGE MONITOR DEVICES ACROSS EXPOSED BEDDING PLANES AT
CAVERN INTERFACE.
REFERENCE(SI
EXISTING CAVERNS SURVEY COMPLETED BY THE CENTER OF ADVANCED SPATIAL
TECHNOLOGIES (CAST) ANO PROVIDED BY NATIONAL FORESTS.
LEGEND
I I i I FIOONE LIMESTONE (FM) I y y y y LAFFERTY LIMESTONE (MBR)
E--_-_ -_ 4 UPPER STJOE(MBR)
Ez �
LOWER ST JOE (MBR)
I I I I i I i 11 FERNVALE LIMESTONE (FMI
- - - - rTEMSTO BE REMOVED
'"""""'"'" =�� LEDGE IN ROOF
k / / / J CHATTANOOGA SHALE(FM) ____________ GEOSYNTHETIC MESH
SECTION NUMBER
SECTION VIEW DRAWING NUMBER
1+50' STATION NUMBER (FEET)
DETAIL CALLOUT NUMBER
SECTION VIEW DRAWING NUMBER
0♦40 0♦30 0♦20
APPROX
DIA
MIN
MAX
REF
TYP
BP
EP
FT
IN
FM
MBR
FRP
0♦10 0+00
ABBREVIATIONS
APPROXIMATE
DIAMETER
MINIMUM
MAXIMUM
REFERENCE
TYPICAL
STATION BEGINING POINT
STATION END POINT
FEET
INCH
FORMATION
MEMBER
FIBER REINFORCED PLASTIC
�FT LONG
THREADED REB.
ROCKBO
(SEE
·�11 ,, I
•I 1/1 ,I• j_l J
I:!
g
10.9ft f l " T ... 1'
1�
DRIPST
ONE
CAVE BYPASS TUNNEL
SCALE 1..,5
SHORT SECT
1O
N
!.Z / LOOKlNG NORTHWEST
SHAFT TO
SURFACE
;I s/
1•,1•
DRIPSTONE CAVE BYPASS TUNNEL
SCALE 1"a5' (C-C'\ SHORT SECTION
C-02 / LOOKlNG NORTHWEST
DRiPSTONE CAVE BYPASS TUNNEL
CAVERN Y>ORK
AREA
BYPASS
TUNNEL
ROCl(80LT ESTIMATED Cl:IUNG QUANTITY
AREA(SQ OFIJFT
ROCl(80LTS
0 15
1· • 15' 0 5 "'4--J"'"I 1· = 5'
FEET
FEET
ESTIMATED
QUANTITY
OF8FT
ROCl(80LTS
ISSUED FOR BID
USDA
United StllN Dtpallment of AQncvllure
Fomts.r.tco
(ROS)
SOUTHERN REGION
a.TA.IIIP$, LOGO$, MO SEALS
Qi. GOLDER l,,,;.;ITT't;;--.._ ll AR S "I..
1,� ,$TtAl:0 '
USIONAl , ENGi KEE'�
�No.16S7� 1• i, ."f..�;fJ;�1•''
&. ISi!& FOii llD morn, & t!JSUED FOii. lft REYIEW g,ai, & -FOIIMIIE\'EW 111111»
& -FCIA-IIE\'EW ,m,,.
NO. REVISIOH I ISSUE DATE
P'FtOJEt1NAME:
BLANCHARD
SPRINGS
CAVERNS
TUNNEL
REHABILITATION
OZARK-ST. FRANCIS
NATIONAL FOREST
SVl.MORE RANGER DISTRICT
DRAWINO nT\£
C-02 DRIPSTONE CAVE
BYPASS TUNNEL PLAN
AND SECTIONS
l».TIE l,NK;Hl'I/E HO.
lll'30/21
DESIGl<Elt
N.OIIR
IUAC
CIEC-
II.DRE/II.HAD
Pf«>JECTHO.
18121310
ORAWINQ IHE.ET NO,
C-02
SHEET 5 OF 11
| 2026-04-23T16:07:22-0500 | |
| SAMMIE MCDOWELL |
| 2026-04-27T15:23:42-0500 | |
| MARY WIMBERLY |
| 2026-04-27T16:25:51-0500 | |
| ROBERT MCBROOME |
| 2026-05-01T10:35:59-0500 | |
| JONATHAN HEYL |
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