HomeMy WebLinkAboutSewer System ReportSewer System Report
for
Castlegate II Subdivision
College Station, Texas
Original Report - Section 200 - February 2011
Section 201 -December 2011
Section 202 - April 2012
Pre pared B
Phillips Engineering
4490 Castlegate Drive
College Station, Texas 77845
(979) 690-3141
TPBE FIRM #13130
GENERAL INFORMATION
The Castlegate II Subdivision is a 202-acre residential subdivision being developed immediately
southwest of the existing Castlegate Subdivision in College Station. The approved Preliminary Plat
shows a total of 645 lots in the whole development. Section 200 has been completed and Section
201 is presently under construction. Section 202 is unchanged from the Preliminary Plat and will
add 38 new lots.
The tract of land that comprises this subdivision lies across a drainage divide that cannot be crossed
using gravity lines. As a result, a lift station is being planned in a later phase of the development.
The force main from this development will empty into one of the trunk lines that serve much of the
rest of the development. On the spreadsheet shown in Exhibit B, the force main is shown as a 12"
gravity line for computational purposes.
Design Criteria:
Primary Sewer Oatfall: 12" sewer line at existing terminus of Victoria Avenue
Domestic Demand:
Avg. Pop Density: 2.67 people per lot
Average Flow: 100 gpd/cap or 267 gpd per lot
Peaking Factor: 4
Pipe: PVC D3034 SDR 26
Applicable Exhibits: Exhibit A — Overall Sewer System Layout
Exhibit B — Sanitary Sewer Analysis Spreadsheet
Conclusion:
The sewer system shown in Exhibit A has been laid out using the criteria in the Bryan/College
Station Design Guidelines. It is analyzed assuming peak flow conditions when the subdivision is
fully developed. The spreadsheet in Exhibit B shows all lines depicted in Exhibit A to be capable
of carrying of the flows that come to them under these conditions. This analysis will be used as
the basis for all subsequent sewer line designs in the subdivision. The system will function as
intended as long as the line sizes and slopes are equal to or greater than those shown herein. It
should be noted that any significant additional flow from off -site sources will likely exceed the
capacity of several lines, so careful study is advised of any changes to the contributing area.
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SHEET NO.
C1.1
Phillips Engineering
Providing Civil Engineering Services to College Station, Bryan and Surrounding Communities
4490 Castlegate Drive, College Station, Texas 77845 (979) 690-3141
May 10, 2012
Carol Cotter
Development Services
City of College Station
P.O. Box 9960
College Station, Texas 77842
RE: LETTER ACKNOWLEDGING CITY STANDARDS
CASTLEGATE H SUBDIVISION, SECTION 202
COLLEGE STATION, TEXAS
Dear Carol:
The purpose of this letter is to acknowledge any deviations from the B/CS Design Guideline Manual during the
design of Castlegate H Subdivision, Section 202. The following deviations are hereby noted:
1. None
I also acknowledge that, to the best of my knowledge, the details provided in the construction plans are in
accordance with the B/CS Standard Details.
Sincerely,
Kent Laza, RE., Mana r
Phillips Engineering
Providing Civil Engineering Services to College Station, Bryan and Surrounding Communities
4490 Castlegate Drive, College Station, Texas 77845 (979) 690-3141
June 12,2012
Danielle Singh
Development Services
City of College Station
P.O. Box 9960
College Station, Texas 77842
RE: LETTER ACKNOWLEDGING CITY STANDARDS
CASTLEGATE II SUBDIVISION, SECTION 202
COLLEGE STATION, TEXAS
Dear Danielle:
The purpose of this letter is to acknowledge any deviations from the B/CS Design Guideline Manual during the
design of Castlegate H Subdivision, Section 202. The following deviations are hereby noted:
1. Sewer Line S-17B is installed at the TCEQ minimum slope of 0.33% instead of 0.40% in the B/CS Design
Guidelines. The purpose is to minimize the depth of these lines through the solid rock that is present in
the upper end of this line on Norwich. This adjusted slope if incorporated in the revised Sewer Report.
I also acknowledge that, to the best of my knowledge, the details provided in the construction plans are in
accordance with the B/CS Standard Details.
SinZv—
'ar
Kent Laza, P.E., Manag
CASTLEGATE If SUBDIVISION, SECTION 202
REVISED ENGINEER'S ESTIMATE
July 11, 2012
_....---_.__.__.-.__......_.___.._._. _......__...._
tin Description Fs'' ! Unit ' Unit Price ; Total
Streets and Silework
1
Excavatibn/GradingStrccts(estimatcd4000cut)
I
1S
8,000.00;
8,000
2
Mixing& Compaction of Subgrade-6"depth
8,001
SY
1.75!
14,002
3
Hydnted Lime (6" @ 27lb/sy)
lOR
TON
170.00
18,360
4
.6" Concrete Pavement w/curb
7,313
1 SY
32.00i
234,016
5
4" Concrete Sidewalk
-.....-_.._... .....
11,529
SF
2.00
23,058
Road
Roadwaysigns
10
EA !
20 0.00 1
2.000
7
End of Road Signs
- 12
EA
200.00
2 400
R '18"RCP, Profile Gasket- Structural Backfill
9 24"RCP, Profile Gasket- Structural Backfill
10 30" RCP, Profile Gasket- Structural Backfill
I 1 .36" RCP, Profile Gasket - Structural Backfill
12 i24" HPDF. Structural Backfill
13 :30" HPDF Structural Backfill
14 4' x 4.5' Junction Box
15 .5'Recessed Inlet
16 10' Recessed Inlet
17 IS' Recessed Inlet
........................._.._............-....... .
IR ConsuuutionLxit
Subtotal - Streets: S301,836
Storm Drainage_Sstem___
414 LF 35.00:
362 LF 39.00
I
LF 44.00.
LF 55.00
LF 27.00
14,490
14,118
12,672
2,035
LP
35.00.
7,420
EA
1,800.00
3,600
FA
2,200.00'
8,800
FA
2,500.0W
15,000
FA
31200.00,
3,200
BA
750.00;
750
19
20
21
In let Protection
: Broadcast Scedwg (ROW & berms)
"1'V lnspwtiun
6
9,000
1,401
EA
SY
100A0
0.25
1.501
600
2,250
2,102
_LF
Subtotal - Storm Drainage'
$95, 137
_-..... ._---Water System ...._.._._.....___--...
_.--.---
22
.12" Water PVC CL200 (C900), CL200, Structural Backfill
353
LF
22.001
7,766
23
8" Water PVC CL200 (C900), CL200, Structural Backfill
294
LF '.
18.00
5,292
24
6" Water PVC CL200 (C900), CL200, Structural Backfill
1,437
LF 1
16.60;
22,992
25
:12" Water Ductile Iron CL350, Structural Backfill
20
LF :
35.00I
700
26
Fire Hydrant Assembly (incl. 6"x6" tee, valve, bend & h dtnnt
2
EA
2,400.00i
4,800
27
112" X 6" M.J. Tee
I
LA
400,00,
40D
28
.8" X 6" M.J. Cross
I
LA
400.00.
400
29
12" M.J. Gate Valve
2
EA
1,250.00
2,500
30
8" M.J. Gate Valve
1
EA
900.00
900
31
6" M3, Gate Volvo -
_
-..._._._. ..._..
3
__.
EA
600-001
_ .
....... . 1,800
32
12 x 45 deg- M J, Bund
4
FA (
225.OD :
900
33
6"x 45 deg. M.J. Bend
4
EA
175.00
700
34
4"BlowoffValve
2
EA
1,600.00i.
3,200
35
2" Blowoff Valve
2
EA
1,100.001
2,200
..36
11"Water Service, Long Side_.____,______-_.. -
j
1,000.00'1.4,000
37
! I" Water Service, Short Side
.i_._..14.__.._.:_EA
2
EA
SOOAoi
1,000
38
.1.5" Water Service, Long Side
3
EA
1,200-00'
3,600
39
;1,5" Water Service, Short Side
8
EA
600.001
4,800
Subtotal Water: $77,950
Page I of 2
CASTLE GATE H SUBDIVISION, SECTION 202
REVISED ENGINEER'S ESTIMATE
July 11, 2012
Ttclu
........ . .... ............ ............ ......... ....
Desmipfiop
........ .. ---------
unit
Unit Price
. ..... ...........
Total
No.
------------- - ---- -------- -
Quantity
Wastewater System_,.-..__.___.___..__.._._....._
40
8" Sewer SDR 26 D-3034 Structural Backfill
1,444
LF
19.50,
26,714
41
8" Sewer SDR 26 D-2241 Structural Backfill
20
LF
2.0.00:
400
42
4' Manholes - 0'- 6.00' Depth
3
EA
1,200.M
3,600
43
4' Manholes - 6.0l'- 8.00'Depth
I
EA
1,500,00.
1,500
44
4'Menholes - UP- 10.00'Depth
----- -------- .— ........... . -- . ......... ....... .
I
EA
1,700.00,
1,700
45
4" Sewer Service, Long Side
9
EA
750A:
6750
46
4" Sewer Service, Short Side
10
EA
350.00!
3500
47
;TV Inspection
1,464
LF
1.50
2,196
Subtotal - Sewer;
$46,360
Metrical System
48
Street Light & Pole
11
FA
1,300.00;
14,300
49
Tx 4'Transfornter Pads
10
EA
200.00'
2,000
50
- I- I " PVC Conduit
1,000
LF
2.00
2,000
51
1-2" PVC Conduit
635
LF
2.25.
1,429
52
.2-2" PVC Conduit ........... ------- ----
2,504
LF
4. ul)
--------------------
10,016
- . . ......... -
53
1-3" PVC Conduit
1,040
LF
2.75
2,860
Subtotal-
Electrical
$32,605
ESTIMATED COWIRUC-1 ION COST $553,887
A
"! 'Ww'
r-';-
Page 2 of
1ti5
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JOHN RUSK a
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0:\614\614006\12103-20-STREETS-VERSION2.OWG 2012/08/30 0 09:44
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OCT 0 7 2012
COLLEGE SlA id
ENGINEERING
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ENGINEERSRS -ARCHITECTS
TECTCT S
SURVEYORS
On L'ROSS PARK OPoVF, WILE 1S0•BRYAN, UXAS 77M,(11B) 778-9700
150B S CHESTNUT ST... WIM M •UAWN, TEXAS 75001 • (W S37-4800
m2012 ALL RIGHTS RESERWO BY GOOOIIN-LASITER. INC. UNAUTHORIZED USE OR REPRODUCTION
IS PROHIBITED YCTHOUT BAITTEN CONSENT FROM GOODIIN-LASITER, INC.
10-04-12 1 CRK I JIR I NITS 61400E
Castlegate II Subdivision SHEET NI
Castlegate Communities D 1
College Station, Texas
Median Drain System Detail
Sewer System Report
for
Castlegate II Subdivision
College Station, Texas
Original Report - Section 200 - February 2011
Section 201 -December 2011
Section 202 - June 2012.
Pre pared fly:
Phillips Engineering
4490 Castlegate Drive
College Station, Texas 77845
(979) 690-3141
TPBE FIRM #13130
GENERAL INFORMATION
The Castlegate II Subdivision is a 202-acre residential subdivision being developed immediately
southwest of the existing Castlegate Subdivision in College Station. The approved Preliminary Plat
shows a total of 645 lots in the whole development. Section 200 has been completed and Section
201 is presently under construction. Section 202 is unchanged from the Preliminary Plat and will
add 38 new lots.
The tract of land that comprises this subdivision lies across a drainage divide that cannot be crossed
using gravity lines. As a result, a lift station is being planned in a later phase of the development.
The force main from this development will empty into one of the trunk lines that serve much of the
rest of the development. On the spreadsheet shown in Exhibit B, the force main is shown as a 12"
gravity line for computational purposes.
Design Criteria:
Primary Sewer Outfall: 12" sewer line at existing terminus of Victoria Avenue
Domestic Demand:
Avg. Pop Density: 2.67 people per lot
Average Flow: 100 gpd/cap or 267 gpd per lot
Peaking Factor: 4
Pipe: PVC D3034 SDR 26
Applicable Exhibits: Exhibit A— Overall Sewer System Layout
Exhibit B — Sanitary Sewer Analysis Spreadsheet
Conclusion:
The sewer system shown in Exhibit A has been laid out using the criteria in the Bryan/College
Station Design Guidelines and TCEQ. It is analyzed assuming peak flow conditions when the
subdivision is fully developed. The spreadsheet in Exhibit B shows all lines depicted in Exhibit A
to be capable of carrying of the flows that come to them under these conditions. This analysis will
be used as the basis for all subsequent sewer line designs in the subdivision. The system will
function as intended as long as the line sizes and slopes are equal to or greater than those shown
herein. It should be noted that any significant additional flow from off -site sources will likely
exceed the capacity of several lines, so careful study is advised of any changes to the contributing
area.
HIUHLI(-iH I LU VIV SLU I MIN LUL
CASTLEGATE II SUBDIVISION
COLLEGE STATION, TEXAS
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