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REVISIONS:
I Lower Limit of
Trench Wall
gaping
CLASS A BEDDING
—{ Trench width as specified r
12"
12"
CLASS B BEDDING
—{ Trench width as specified r
- + Bc Bc
—{ Bc+B" (Min.) 1� 1�8 B�
(6 Min.) (4 Min.)
3000 P.S.I. Concrete
CLASS C BEDDING
Trench width as specified I`
12"
"` �IM
1/4 B :. .,
Compacted Granular 1 f8 Bei
Material or Backftll (4 Min.)
UNSTABLE SUBGRADE
Trench width as specified I~
Granular or :. +
Uniform Graded
Material
fig.. o ag" o o� ob
08o �000
1 1/2" ROdt �' 6" Min.
° °o �' o aoo
—T
Large Stones, Broken
Concrete, Etc. (If Required)
General Notes:
1. Trench widths shall be as specified
on plans.
2. Bc = Outside Pipe Diameter.
2. Refer to the storm drainage
construction standards, section 6,
"Bedding Materials" for gradations.
Compacted
Backfill
Compacted Granular
Material or Backfill
ROCK EXCAVATION
�{ Trench width as specified r
12" Min.
Uniformly Graded + — Bc
Rock or Compacted :�, • �' •. ;.:.:
Selected Graded
Granular Material
6" Min J
SUBDRAIN DETAIL
�{ Trench width as specified I`
Filter Compacted
Material Backfill
§ eo
DO DO�O�O�' OO RJ
Min. °�g4g b$oa�3°oa43 Gmvel Filter
Perforated or I
Slotted Pipe
BEDDING REQUIREMENTS
ICITY OF FORT COLLINS, COLORAD�
ENGINEERING SERVICES UNIT
APPROVED BY: Ild
D-1
CONTINUOUS NO. 4 BARS
NO. 3 BARS AT 3 FT. CENTERS
CONTINUOUS NO. 4 BARS
NO. 3 BARS AT
3 FT. CENTERS
SEWER
LINE
10 FT. MINIMUM
10 FT. MINIMUM
WATER LINE
NOTE: CONCRETE ENCASEMENT WILL BE REQUIRED ON SEWER LINE WHEN CLEAR VERTICAL DISTANCE
FROM WATER LINE IS LESS THAN 1 FT.-6 IN. OR HORIZONTAL DISTANCE IS I-ESS THAN 10 FT.
BETWEEN PARALLEL LINES. CONCRETE ENCASEMENT REQUIRED IN ALL CASES WHERE SEWER
LINE IS ABOVE WATER LINE OR IS UNDER A WATERWAY CROSSING.
CONCRETE ENCASEMENT DETAIL
® clmr OP PM oouw1 sE1111CR CONaTR1�C7ION ��D` oerAL
WATM MW DATE: 6/14/90 Q
eb t>tit oa WASTMATOI UTEM DUALS DRAWN
DRAWN BY: DR, SC
FINAL
FOR CONSTRUCWN
OCTOBER 21, 1997
__.. _
DATE: ESIGNED BY: DRAWN BY: APPROVED BY: SHEET
CITY OF FORT COLLINS, COLORADO KM GSF KM TIMBERLINE ROAD EXTENSION DT4
SCALE: DATE: CHECKED BY: DATE: WATER AND SEWER DETAILS OF
ENGINEERING DIVISION AND STORMWATER UTILITY (ity410ortcollinq A NA 10-20-97 ,, FSW 10-21-97 ,, _ 4
C -1.
P,w064
234
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