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EXISTING NATURAL STREAM BED WIDTH <br />B SIZE OF BED B BANK ROCKS VARY - <br />INTEGRATE INLET STRUCTURE WITH <br />EXISTING STABLE CHANNEL -� <br />in <br />cLu <br />N w <br />+z <br />m ? <br />F Z <br />cn w 15' <br />i <br />INSTALL PIPE DEBRIS <br />POSTS PER DETAIL <br />5 <br />17 °/ <br />NATURAL STREAM BED <br />ROCK 3 DEEP^ <br />3' DIAMETER ---. <br />BOULDERS <br />1.5' MIN. SPACE <br />BETWEEN BOULDERS <br />2.5' (TYP) <br />PLAN <br />;' I... <br />u <br />3' <br />0.67' —•-I <br />AS REQUIRED <br />-Y INTO <br />RAL GROUND <br />ROCK SIDE SLOPE <br />EXTEND WALLS <br />TO MEET BUTTRESS <br />MIN <br /># 4 AT 10 ' E -W CENTERE <br />3 CLR <br />CONSTRUCT REINFORCED CONCRETE <br />PROFILE B" CUTOFF WALL 3 MIN. DEPTH OR TO <br />KEY INTO NATURAL ROCK <br />INLET STRUCTURE <br />SCALE: I"= 5' HORIZ.aVERT I <br />c� <br />1 <br />CS- <br />APPROX.TOE OF <br />ROCKFILL BUTTRESS <br />�5 <br />- <br />zj <br />APPROX <br />�- <br />n N <br />STREAM <br />v <br />3' DEEP RIPRAP F <br />?I AT START OF BAS <br />3 DIAMETER BOULDERS <br />4-:—CENTEREDON 1.5'SPACE <br />EXTEND ROCK SIDE SLOPE <br />BACK TO MEET BUTTRESS <br />3 DIAMETER BOULDERS <br />APPROX. TOE OF <br />ROCKFILL BUTTE <br />PLAN <br />PROFILE <br />OUTLET STRUCTURE <br />SCALE: V= 5' HORIZ.8 VERT <br />18" TO 24' BOULDERS <br />ON BED B SIDES <br />STREAM BED - <br />-ROCK 3 DEEP <br />TIE RIPRAP TO <br />10' OR TO MATCH <br />I- NATURAL ROCK <br />SECTION <br />INLET STRUCTURE <br />SCALE! 1" = 5' <br />PLAN <br />DEBRIS BASIN <br />SCALE 1° = 10' <br />EARTH OR BACKFILL <br />\ � 5 <br />APPROX. EXIST. GROUND <br />TIE RIPRAP TO EMBANKMENT <br />ON SIDES B UPSTREAM END <br />1.5 <br />\ II <br />8 TO 17 <br />TYPICAL SECTION <br />OUTLET STRUCTURE <br />NTS <br />SHOP FABRICATE FITTING <br />WITH CONTINUOUS WELD. <br />COAT WELD WITH ZINC RICH PAINT <br />IE RUSTOI ' "" " r " " "" <br />AFTER FC <br />ANGLE POINT DETAIL <br />NTS <br />1.5 SPACE <br />(TYP) <br />1. <br />1� <br />VARIES <br />O'T04 <br />DEPTH <br />APPROX. <br />STREAM <br />i <br />NATURAL STREAM BED 3 <br />FLpyyy <br />o� <br />o .> <br />3 <br />PIPE <br />* AS DETERMINED <br />PROJECT MANAGER <br />EXISTING GROUND --,, <br />TYPICAL SECTION <br />DEBRIS BASIN <br />SCALE. 1" = 10' <br />3 MIN DEPTH <br />OF ROCK ON <br />BOTTOM B SIDES <br />/J1 <br />11/2 (TYP) <br />rd <br />ROUND OFF CONCRETE <br />AT TOP OF PIPE <br />—4 °0 SCHED. 40 STEEL PIPE (GALVANIZED) <br />CONCRETE FILL IN PIPE B BASE. <br />POUR CONCRETE AGAINST <br />" NATURAL GROUND OR ROCK <br />INLET STRUCTURE RIPRAP <br />;D° W <br />DETAIL <br />DEBRIS POST <br />NTS <br />SPECIFICATIONS <br />48 -INCH CSP AND RIPRAP STRUCTURES <br />1. DESCRIPTION - CONSTRUCT STREAM DIVERSION, 48 -INCH CORRUGATED STEEL PIPE <br />CSP CULVERT, RIPRAP INLET STRUCTURE AND OUTLET STRUCTURE IN <br />ACCORDANCE WITH THESE PLANS AND SPECIFICATIONS. COORDINATE TUBE <br />DRAWINGS AND CONSTRUCTION SEQUENCING WITH SUBGRADE PREPARATION AND FILL <br />PLACEMENT. <br />2. STREAM DIVERSIONS - PRIOR TO EXCAVATING AND FILLING FOR PIPE, INLET AND <br />OUTLET STRUCTURES, THE CONTRACTOR SHALL DIVERT THE STREAM CHANNEL TO <br />BYPASS THE CONSTRUCTION AREA. THE DIVERSION SHALL. BE SUFFICIENT TO <br />BYPASS LOW FLOWS AND ANY REASONABLY EXPECTED FLOOD FLOWS. THE <br />CONTRACTORS SHALL BE RESPONSIBLE FOR M"NITAINING THE DIVERSION SUCH <br />ME <br />THAT HIS WORE MAY PROCEED UNINTERRUPTED Aft THE DRY. 1 <br />3. CORRUGATED STEEL PIPE (CSP) <br />3.1 MATERIALS - THE GALVANIZED CORRUGATED STEEL PIPE SHALL BE <br />FABRICATED IN ACCORDANCE WITH THE REQUIREMENTS OF AASHTO M -36. A <br />LETTER CERTIFYING THAT THE PIPE RAS BEEN MANUFACTURED IN <br />ACCORDANCE WITH THIS STANDARD SHALL BE FURNISHED. THE PIPE SHALL <br />HAVE A MINIMUM WALL THICKNESS OF 0.109 INCHES AND A STEEL AREA OF <br />1.356 IN2 /FT, AND SHALL BE HELICALLY WOUND WITH REFORM ENDS TO <br />ACCEPT COUPLER BANDS. COUPLER BANDS SHALL. BE FURNIBHED BY THE <br />PIPE MANUFACTURER AND CONSIST OF 24 -INCH WIDE BEMI- CORRUGATED <br />BARDS WITH CONNECTING DEVICES AND O -RISIG M R9M SLEEVE GASKETS. <br />CORRUGATIONS MAY BE 2 -2/3 X 1/2, 3 1 1 OIL 5 X 1. <br />3.2 COMPACTION - THE CONTRACTOR SHALL COMPACT BACIFILL AROUND THE PIPE <br />TO —NHRE QUIRED DENSITY BY HAND OPERATID EQUIPMENT LEAVING A <br />2 -INCH* SPACE BETWEEN THE PIPE AND COMPACTION EQUIPMENT TO PREVENT <br />DAMAGE OR DEFLECTION TO THE PIPE. <br />4. RIPRAP STRUCTURES - RIPRAP INLET AND OUTLET STRUCTURES SHALL BE <br />CONSTRUCTED OF DURABLE IGNEOUS BOULDERS EXCAVATED FROM THE SITE. <br />SANDSTONE ROCK MAY BE USED IF IT IS HARD, DURABLE AND NOT SUBJECT TO <br />MECHANICAL DAMAGE BY EQUIPMENT OR AIR OR WATER BLAZING. THE RIPRAP <br />SHALL PRIMARILY CONSIST OF THE SIZES NOTED ON THE PLANS (AT LEAST 50% <br />BY VOLUME), HOWEVER, SMALLER SIZES SHALL BE USED TO FILL SPACES BETWEEN <br />THE LARGER SIZES. THE ROCK SHALL BE CAREFULLY PLACED TO FORM A DENSE <br />INTERLOCKING LAYER WITH INTERSTITIAL SPACES FILLED AND THE EXPOSED <br />SURFACE ROCKS PROTRUDING IN AN IRREGULAR MANLIER TO CREATE A ROUGHNESS <br />SIMILAR TO THE NATURAL STREAM. THE STRUCTURES SHALL TRANSITION TO <br />MATCH THE SHAPE OF THE NATURAL CHANNEL AT THE UPSTREAM AND DOWNSTREAM <br />ENDS. <br />5. REINFORCED CONCRETE — REINFORCED CONCRETE SHALL CONFORM TO THE COLORADO <br />DIVISION OF HIGHWAYS (CDOH) STANDARD SPECIFICATIONS FOR ROAD AND BRIDGE <br />CONSTRUCTION. CONCRETE SHALL BE CLASS A. REBA��C�jgj gffNT <br />SHALL CONFORM TO CDOH STANDARDS. ��i [� v Cu <br />SEP 171986 <br />�Emm, <br />V v y V V Y <br />111111 VIII VIII VIII VIII VIII IIII IIII <br />