HomeMy WebLinkAbout2000 10 23 Informational B Greenbriar Subdivision Stormwater System Report
COMMISSION AGENDA
ITEM B
CONSENT
INFORMATIONAL X
PUBLIC HEARING
REGULAR
October 23,2000
Meeting
MGR rv- IDEPT J~
Authorization
REQUEST: Public Works Department Forwarding to the City Commission a summary of the
Greenbriar Subdivision Stormwater system report.
PURPOSE: The purpose of this Board item is to provide a copy of the Greenbriar subdivision
stormwater facility inspection report as requested at the 9/11/00 meeting.
CONSIDERA TIONS:
A request was made at the September 11, 2000 City Commission meeting for staff
inspect the Greenbriar subdivisions stormwater system with particular attention to any
potential negative impacts caused by the construction in Phase II. Limited inspections are
routinely conducted in private subdivisions to provide technical support and advice. They
typically consist of visual inspections of manholes, inlets, outlets, and ponds. Pipe interiors are
not inspected.
In general, the system was found to be in good condition with some minor maintenance
items needed. This is typical of private subdivisions which generally do not perform regular
maintenance activities on stormwater and underdrain systems. A more detailed breakdown is
attached although the engineering plans which the manhole numbers reference was provided
separately to Commissioner Martinez due to limited availability. Staff is available to meet with
HOA representatives to review the report if requested.
ATTACHMENTS:
1. Inspection Summary with breakdown report attached
COMMISSION ACTION:
None required.
ATTACHMENT NO. 1
CITY OF WINTER SPRINGS, FLORIDA
Utility I Public Works
Department
1126 EAST STATE ROAD 434
WINTER SPRINGS. FLORIDA 32708-2799
Telephone (407) 327-1800
Fax (407) 327-6695
TO:
Commissioner Martinez
VIA:
Ron McLemore, City Manager
VIA:
Kip Lockcuff, P.E. Director Public works.iti~'ty
j ;
Kim Hall, E.!. Stormwater Utility Manage / /
L/
;IY
FROM:
DATE:
October 3,2000
RE:
Greenbriar Subdivision
An inspection was performed on September 26,2000 of the Greenbriar Subdivision's
stormwater facility as requested by Commissioner Martinez. The inspection included a
visual inspection to the stormwater pond and opening manhole lids to visually inspect the
inlets.
In summary the pond is in good condition with a small delta fom1ing adjacent to the
submerged pipes discharging into the pond. This delta should be removed in order to
eliminate a possible blockage in the pipe. The outfall structure needs to be free and clear
from the growing vegetation.
Underground stormwater pipe conveyance systems are not typically maintained very well
by private subdivisions. From a visual inspection, it appears that a few inlets will need
minor repairs, as noted on the inspection report. Many inlets will also need to have dirt
and debris removed. Based on the accumulation at the manholes, a few sections of pipe
may contain large amounts of dirt and debris, but a video inspection by a licensed
contractor will need to be prefom1ed to determine the severity. The overall condition of
the pipe system is good.
The underdrains, for the roads, are recommended to be flushed.
Please refer to the attached drawings and inspection reports.
.... ~
September 27,2000
Greenbriar Subdivision - Stormwater System & Pond Inspection
(Performed by Z.Perez and P. Wiggins dated September 26, 2000, reference as-built
engineering)
A. List and Status of the storm structures;
(Phase 1)
1. Sl - OK
2. S lA - Found small pile of landscape rocks and hardened concrete (not much) inside
inlet.
3. S2 - Dirt pile on top of inlet-manhole cover.
4. S3 - Broken section of the inlet top.
5. S4A-OK
6. S4-0K
7. S5 - Infiltration / seepage on the joint between the structure box and the pipe. Signs
of settlement around the inlet.
8. S6 - OK. Plantings and mulch on top of the inlet.
9. S7 - same as S5 but no settlement yet.
10. S8 - Surcharge, full of floatables
11. S9 - Same as S8
12. S 10 - Same as S8
13. SII- Same as S8
14. Outfall structure to the pond (from SlI) - Underwater. Appears to contain sand/dirt
build-up and presence of delta (?). This build-up appears to cause the surcharge to
structures S8, S9, S10, & Sl1.
15. S12 - OK
16. S13 - Surcharge
17. S 14 - Surcharge
18. S25 - Surcharge
19. Outfall structure to the pond (from S 14) - Underwater. Appears to contain sand/dirt
build-up that's causing the surcharge to structures S12, S13, S14 & S25.
20. S31 - Control structure, found overgrowths inside the skimmer.
21. S30 - Found heavy vegetation where structure is located.
(Phase2 )
22. S15 - OK
23. S15A-OK
24. S15B - OK
25. S16-0K
ti,. ,..
, ~
Greenbriar Subd. - Stormwater Insp.
Page 02
26. S17 - OK
27. S17A-OK
28. S 17B - OK
29. S18 - Found seepage at the construction joint of the box-structure
30. S19 - OK
31. S19A-OK
32. S20 - Surcharge
33. S21- Surcharge and about 1.5 ft. of sand build-up in the manhole and appears to
extend further in the pipes.
34. S21A-OK
35. S22 - OK
36. S22A - OK
37. S23 - Surcharge
38. S23A - Surcharge
39. S24 - Surcharge
40. J-manhole (2) - Surcharge
41. Outfall structure to the pond (from the J-manhole(s) - Underwater. Appears to
contain sand/dirt build-up that's causing surcharge to structures 23, 23A, 24 & J-
manholes.
B. Roadway Underdrains;
Found various debris like dirt, roots, rocks, etc. located In the outfall-pipe of the
underdrains inside the storm structures.
"
INSPECTION FORM
For Private Subdivisions
Name of Subdivision Green bri(l(
Date of Inspection
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Streets 06 frJ;~. M/
Name of Inspector(s) }:>.'T< /~ff~,~/Jr:q;w.M (c,/~:,
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Pond Identification
Description of Whether (day of inspection)
Description of Whether (day before inspection) ~AlAlv. 4-r
. /'. ry-
I. Type of outfall structure if exist. 0/1//(/ p~-(.
2. Briefly describe condition of outfall structure ~<",>j) (!t1N'f) <f;;~...., "
f/~'1 ^'
3. Briefly describe condition of skimmer, if any 4:/<.,1;, (l).~<bl to;.,,. e/c,(~, ((.::f?~)
4. Are there any significant pond benn erosion problems?
YES
("/NO
If YES, explain situation.
5. Are there cattails or other undesirable plants and/or algae that will require treatment or removal?
~S
NO
If YES, explain situation.
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6. Briefly describe condition of pond 40b l C/ P.4/{ .. Av~ (/If.A.-J
7. Olher Commenls
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