HomeMy WebLinkAboutOversize Participation Phillips Engineering
Providing Civil Engineering Services to College Station and Surrounding Communities
4490 Castlegate Drive, College Station, Texas 77845 (979) 690 -3141
March 1, 2011
Josh Norton
Development Services
City of College Station
P.O. Box 9960
College Station, Texas 77842
RE: OVERSIZE PARTICIPATION REQUEST
CASTLEGATE II SUBDIVISION, SECTION 200
COLLEGE STATION, TEXAS
Dear Josh:
With this letter I wish to initiate a request for Oversize Participation by the City of College
Station for the 12" water line being installed with Section 200 of Castlegate II. This water line
was designed to comply with the City's Water Masterplan which calls for a 12" line to parallel
WS Phillips Parkway through the subdivision. The construction plans for the water system are
included with this submittal for your review. They show a total of approximately 2113 feet of
12" line running along WS Phillips and Toddington.
In the accompanying Water System Report, you will see that we have modeled the water system
in the subdivision using 4 ", 6" and 8" lines. The model demonstrates that the system performs
above minimum standards using these line sizes. We conclude that anything larger than an 8"
line can be considered oversized.
Also included with this submittal is an estimated cost of the water systems using 12" lines and
another using 8" lines instead. The difference in cost between the two line sizes and the related
fittings is $23,863. I believe this is a conservative number and that actual construction costs
should not exceed that figure. I also estimate a cost of 3% of that figure for the performance and
payment bonds which comes to $5,867. The total Oversize Participation request is for $29,730.
This figure is approximately 15% of the overall water system cost and is well below the threshold
limit of 30% where competitive bidding becomes a requirement.
I ask that you review these accompanying documents and forward them to other staff members
involved in the Oversize Participation process. Please let me know what subsequent steps we ned
to take to move forward with this request. Thank you.
Sincerel ,
/-
Kent Laza, P.E. a
Manager
Phillips Engineering
attachments
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CASTLEGATE II SUBDIVISION, SECTION 200
ENGINEER'S ESTIMATE OF OVERSIZE PARTICIPATION COSTS
March 1, 2011
Item Description Est. Unit Unit Price Total
No. Quantity
Water System w /12" lines
1 12" Water PVC CL200 (C900), CL200 Structural Backfill 659 LF 33.00 21,747
2 12" Water PVC CL200 (C900), CL200 Non - Structural Backfill 1,454 LF 29.00 42,166
3 8" Water PVC CL200 (C900), CL200, Structural Backfill 309 LF 24.00 7,416
4 8" Water PVC CL200 (C900), CL200 Non - Structural Backfill 1,038 LF 21.00 21,798
5 6" Water PVC CL200 (C900), CL200, Structural Backfill 45 LF 21.00 945
6 6" Water PVC CL200 (C900), CL200 Non - Structural Backfill 862 LF 18.00 15,516
7 20" Steel Casing Pipe, w /casing spacers and end caps 70 LF 90.00 6,300
8 14" Steel Casing Pipe, w /casing spacers and end caps 110 LF 75.00 8,250
9 Fire Hydrant Assembly (incl. 12 "x6" tee, valve, bend & hydrant) 2 EA 3,500.00 7,000
10 Fire Hydrant Assembly (incl. 6 "x6" tee, valve, bend & hydrant) 1 EA 3,300.00 3,300
11 Connect to existing water line 2 EA 500.00 1,000
12 12" X 12" M.J. Cross 1 EA 750.00 750
13 12" X 8" M.J. Cross 1 EA 600.00 600
14 8" X 6" M.J. Cross 1 EA 500.00 500
15 12" X 12" Tee 1 EA 600.00 600
16 8" X 8" Tee 1 EA 400.00 400
17 12" M.J. Gate Valve 3 EA 1,800.00 5,400
18 8" M.J. Gate Valve 6 EA 1,200.00 7,200
19 6" M.J. Gate Valve 3 EA 850.00 2,550
20 12" X 45° M.J. Bend 6 EA 400.00 2,400
21 8" X 45° M.J. Bend 7 EA 300.00 2,100
22 8" X 22.5° M.J. Bend 2 EA 300.00 600
23 12 "x 8" M.J. Reducer 2 EA 300.00 600
24 8 "x 6" M.J. Reducer 1 EA 225.00 225
25 4" Blowoff Valve 3 EA 2,200.00 6,600
26 2" Blowoff Valve 3 EA 1,500.00 4,500
27 1" Water Service, < 15 ft (avg length = 3 ft) 2 EA 600.00 1,200
28 1" Water Service, > 15 ft (avg length = 47 ft) 5 EA 1,100.00 5,500
29 1.5" Water Service, < 15 ft (avg length = 3 ft) 11 EA 650.00 7,150
30 1.5" Water Service, > 15 ft (avg length = 47 ft) 9 EA 1,250.00 11,250
Water System w/ 12" lines $195,563
Water System w /8" lines
1 8" Water PVC CL200 (C900), CL200, Structural Backfill 968 LF 24.00 23,232
2 8" Water PVC CL200 (C900), CL200 Non - Structural Backfill 2,492 LF 21.00 52,332
3 6" Water PVC CL200 (C900), CL200, Structural Backfill 45 LF 21.00 945
4 6" Water PVC CL200 (C900), CL200 Non - Structural Backfill 862 LF 18.00 15,516
5 14" Steel Casing Pipe, w /casing spacers and end caps 180 LF 75.00 13,500
6 Fire Hydrant Assembly (incl. 8 "x6" tee, valve, bend & hydrant) 2 EA 3,300.00 6,600
7 Fire Hydrant Assembly (incl. 6 "x6" tee, valve, bend & hydrant) 1 EA 3,300.00 3,300
8 Connect to existing water line 2 EA 500.00 1,000
9 8" X 8" M.J. Cross 2 EA 600.00 1,200
10 8" X 6" M.J. Cross 1 EA 500.00 500
11 8 "X8 "Tee 2 EA 41111 800
12 8" M.J. Gate Valve 9 EA 1,200.00 10,800
13 6" M.J. Gate Valve 3 EA 850.00 2,550
14 8" X 45° M.J. Bend 13 EA 300.00 3,900
15 8" X 22.5° M.J. Bend T � 2 EA 300.00 600
16 12 "x 8" M.J. Reducer ��a• ••�-'� 2 EA 300.00 600
17 8 "x 6" M.J. Reducer 0' • t 1 EA 225.00 225
18 2" Blowoff Valve 1 1. * 0 6 EA 1,500.00 9,000
...Owl 1" Water Service, < 15 ft (avg length = 3 ft) .�� ' *i 2 EA 600.00 1,200
20 1" Water Service, > 15 ft (avg length = 47 ft) . .l......... 5 EA 1,100.00 5,500
21 1.5" Water Service, < 15 ft (avg length = 3 ft) 11 EA 650.00 7,150
22 1.5" Water Service, > 15 ft (avg length = 47 ft) - 9 EA 1,250.00 11,250
Sri
ti ‘ • Water System w /8" lines $171,700
� `� ` " Oversize Participation Estimate $23,863
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