Po INPP8132100P53THE TIBERTI COMPANY, LLC

Description of requirement

DEVIL'S HOLE VISITOR TUNNEL: FABRICATE AND INSTALL OBSERVATION TUNNEL FENCES AND GATES; TUNNEL WILL BE CONSTRUCTED OF 185 LF OF TWINBAR HIGH SECURITY FENCE PANELS (90 LINEAR FEET ON EACH SIDE OF THE TRAIL AND 5 FEET ENCLOSING THE END OF THE VISITORS' PLATFORM). FROM THE 8' WIDE ENTRANCE THE TUNNEL WILL TAPER TO 4.5 FEET WIDE (3.5 FEET WALKWAY PLUS 6" EITHER SIDE TO ACCOMMODATE POSTS), ENTIRELY ENCLOSED AND EXCLUDING VISITORS FROM THE SITE. TWO UNCOVERED VIEWING OPENINGS, EACH THREE FEET LONG AND 18 INCHES HIGH, WILL BE CUT OUT OF THE NEW TWINBAR HIGH SECURITY FENCE. THE WINDOWS WILL BE PLACED SO ONE IS PLACED FOR EASY ADULT VIEWING, THE OTHER FOR EASY CHILD VIEWING. THE TWINBAR FENCE OF WHICH THE TUNNEL WILL BE MADE WILL NOT INCLUDE THE DOUBLE ANGLED TOPS. INSTEAD THE TUNNEL WILL BE COVERED OVER BY A ROUNDED HOOP OF CHAINLINK FABRIC. THE HOOPS WILL BE FABRICATED BY BENDING STANDARD CHAINLINK FENCE POLES THE SAME OUTSIDE DIAMETER OF THOSE USED FOR THE 'DOGLEG'. (THE 1/2 CIRCLE DIAMETER BEND OF THE POST WILL BE (IN MOST CASES) 4.5 FEET (WIDTH OF WALKWAY), MAKING THE HEIGHT IN THE CENTER OF THE TUNNEL 2.25 FT HIGH. THESE HOOPS WILL BE WELDED TO STANDARD CHAINLINK FENCE POSTS AND INSTALLED INSIDE-SITE SIDE OF THE TWINBAR FENCE. THE SAME TYPE OF CHAINLINK FABRIC THAT WILL FENCE THE 'DOGLEG' WILL BE USED TO COVER THE TUNNEL HOOPS (ONLY). A TENSION BAND WILL BE WOVEN IN AND OUT OF THE TWINBAR FENCE TO SECURE THE CHAINLINK FABRIC TO THE HOOPS. -FT (SINGLE PANEL) GATE OPENING OUT WILL BE CREATED ON THE SOUTH SIDE OF THE TUNNEL. NO ADDITIONAL PAVING WILL BE ADDED TO THE EXISTING TRAIL, BUT OTHER TRAIL UPGRADES SUCH AS STEPS OR WATERBARS WOULD BE IMPLEMENTED AS NECESSARY FOR SAFETY AND TO CONTROL TRAIL EROSION.