HomeMy WebLinkAboutEngineer On-Site Inspection ReportRECEIVEDOEC 0 3 1930
MOSBY AND ASSOCIATES, INC.
CONSULTING; ENGINEERS
1507 20TH STREET
P.O. BOX 6368
VERO BEACH. FLORIDA 32961
407-569-0035
November 30, 1990
Mr. Robert S. McClary
City Manager
City of Sebastian
Post Office Box 127
Sebastian, Florida 32978-0127
Subject: Sebastian Highlands Units 16 and 17
Sebastian, Florida
Engineer's Project No. 90-449
Dear Mr. McClary:
As requested, we have completed our on-site inspection and review
of the existing roadway and drainage conditions of Units 16 and
17 of the Sebastian Highlands. The purpose of our inspection was
to determine the extent of the deteriorated roadways and drainage
and to develop a cost estimate for the repair or replacement of
the roadways and drainage structures. Our inspection included
the following items:
I. Unit 16
a. Inspection of the existing roadways.
b. Inspection of the existing roadway curb and gutters.
C. Inspection of the existing drainage ditches.
d. General inspection of the existing drainage culverts
and structures.
II. Unit 17
a. Inspection of the existing roadways. An inspection
of the newly completed portion of Unit 17, located
in the southeast section of Unit 17, was not com-
pleted.
Mr. Robert S. McClary
November 30, 1990
Page 2
b. Inspection of the existing roadway swales.
C. Inspection of the existing drainage ditches.
d. Inspection of the existing drainage culverts and
structures.
III. Elkcam Waterway
We performed a general inspection of the Elkcam Waterway
to determine the extent of the seawall that has not been
constructed to the west of the Sebastian Highlands. We
have provided an estimate of the construction of Elkcam
Waterway drainage control structure. Since we have not
been provided with construction details of the drainage
overflow structure, the construction cost estimate is sub-
ject to change.
IV. Wentworth Street Drainage Ditch
It is our understanding that the Wentworth Street
drainage ditch has been constructed in the wrong location.
We inspected the ditch to determine what would be
required to relocate the ditch and the cost of the
Improvements.
It should be noted that no inspections were performed in the
areas where the roads have not been constructed.
We have previously submitted, to your office, the following
documents detailing the findings of our on-site inspections:
1. Three (3) copies of drawing Sheet 1 of 3 detailing the lo-
cation of the existing drainage culverts and structures,
within Unit 16 and the older portions of Unit 17.
2. Three (3) copies of drawing Sheet 2 of 3 and 3 of 3
detailing the location of where our construction photo-
graphs were taken and a listing of what the photograph
depicts for Unit 16 and Unit 17 respectively.
3. One (1) set of four (4) aerials of Units 16 and 17 in
which we have noted the drainage ditches which require
Improvements.
4. An album of photographs taken during our on-site Inspec-
tion.
'Mr. Robert S. McClary
November 30, 1990
Page 3
The following is a generalization of our findings:
I. Unit 16
The overall condition of Unit 16 is fairly good. All
the roadways require resurfacing with at least one
Inch (111) of asphalt. There are some locations which
require repair to the base and subgrade.
Since the drainage collection system consists of curb
and gutter and drop inlets, we were unable to determine
the condition of the underground culvert pipes. All
the curb and gutter requires cleaning and removal of
weeds. All drainage ditches require cleaning out.
II. Unit 17
We recommend that all the streets, roadway swales and
drainage structures be replaced and regraded within the
older portion of Unit 17, south of Elkcan Waterway. The
roadways of the portion of Unit 17, north of Elkcan Water-
way are constructed with curb and gutter and are in fairly
good shape. We have not included the entire replacement
of the drainage culverts in our cost estimate for this
portion of Unit 17 except for the drainage structures
that need immediate repair.
The following is a list of the streets, along with their
lengths that were inspected. The streets and their
lengths were provided by the City of Sebastian in a memo
from Mr. Dave Fisher dated January 31, 1990. The pipes'
lengths and sizes, outlined in the following cost
estimate, are based on our on-site inspection.
Unit 16
old Existing Streets
Englar Avenue
7,500'
Kildare Drive
3,000'
Harris Drive
3,000'
LaPlaya Lane
1,500'
Indian Avenue
600'
Ala Meda Avenue
1,000'
Cardinal Drive
1,400'
High Court
1,000'
Conover Avenue
1,000'
Ogden Avenue
1,000'
Total...........................................21,000 LF
Mr. Robert S. McClary
November 30, 1990
Page 4
Unit 17
Old Existing Streets
Barber Street
2,300'
Schumann Drive
8,500'
Filbert Street
3,900'
Hinchman
2,050'
Nebraska Circle
2,550'
Friar Court
1,750'
Bryant Court
800'
Melton Avenue
1,550'
Lancaster Street
1,000'
Karrigan Street
1,000'
Larchmont Terrace
3,550'
Landover Drive
1,000'
Redgrave Drive
1,200'
Joy Haven
200'
Curtis
850'
Thunderbird Drive
1,150'
S. East Street
(Curb
&
Gutter)
1,400'
Caprona Street
(Curb
&
Gutter)
2,600'
Empress Avenue
(Curb
&
Gutter)
1,900'
Marsh Street
(Curb
&
Gutter)
800'
Dahl Avenue
(Curb
&
Gutter)
1,400'
Ormand Court
(Curb
&
Gutter)
1,000'
Capri Avenue
(Curb
&
Gutter)
2,100'
Englar Drive
(600' Curb
&
Gutter)
2,000'
Osceola
(Curb
&
Gutter)
800'
Aetna Street
(Curb
&
Gutter)
1,000'
Admiral Circle
(Curb
&
Gutter)
1,900'
Flint Street
(Curb
&
Gutter)
700'
Lance Street
(Curb
&
Gutter)
200'
Mabry Street
(Curb
&
Gutter)
3,330'
Crawford Drive
(Curb
&
Gutter)
2,300'
Spring Valley Avenue
(Curb
&
Gutter)
1,700'
Total...........................................58,480 LF
11.08 Miles
Mr. Robert S. McClary
November 30, 1990
Page 5
The following is the cost estimate for the repair and
reconstruction of the roadways and drainage structures within
Units 16 and 17. It should be noted that a cost contingency will
be added to this cost estimate since a very detailed topographic
survey of the existing roadways and drainage swales was not
provided to determine the actual extent of the deteriorated
drainage roadway swale. Since there are so many problems within
the Sebastian Highlands, it could be determined with a detailed
analysis that the entire drainage system may require
reconstruction. Also, it should be noted that the existing pipes
consist of corrugated metal pipe which is not acceptable by
today's standards. Our cost estimate is based on the replacement
of the culverts with corrugated aluminum pipe.
Preliminary Cost Estimate
Item Quantity Unit Cost Cost
I. Unit 16
1. Resurface the
Existing Roadways
21,000 LF
$
7.00/ft
$ 147,000
2. Repair & Clean
Curb & Gutter
42,000 LF
$
1.00/ft
$ 42,000
3. Improve Existing
Drainage Ditches
3,340 LF
$
5.00/ft
$ 16,700
4. Replace Curb
Inlets
3 Ea.
$
5,000/Ea.
$ 15,000
Sub -Total ...........................................$
220,700
II. Unit 17
1. Roadway Replacement
w/Swales 34,750 LF $ 16.00/ft $ 556,000
2. Roadway Resurfacing
w/Curb & Gutter 23,730 LF $ 7.00/ft $ 166,110
3. Remove Existing
Roadway 34,750 LF $ 3.00/ft $ 104,250
Mr. Robert S. McClary
November 30, 1990
Page 6
Item
4. Drainage Culverts
a. 15110 CAP
b. 18110 CAP
c. 21110 CAP
d. 24110 CAP
e. 48110 CAP
f. 54110 CAP
g. 28" x 20" CAP
5. Remove Existing
Culverts
6. Concrete Headwalls
a. 15110 CAP
b. 18110 CAP
c. 21110 CAP
d. 24110 CAP
e. 48110 CAP
f. 54110 CAP
g. Double 18110 CAP
h. 17" x 13110 CAP
1. 21" x 15110 CAP
7. Dispose of Existing
Concrete Headwalls
B. Regrade Roadway
Swales
Quantity
Unit
Cost
15
LF
$ 19.00/LF
$
285
749
LF
$ 23.00/LF
$
17,227
135
LF
$ 26.00/LF
$
3,510
374
LF
$ 30.00/LF
$
11,220
68
LF
$ 97.00/LF
$
6,596
51
LF
$ 110.00/LF
$
5,610
62
LF
$ 40.00/LF
$
2,480
1,454
LF
$ 6.00/LF
$
8,724
2
Ea.
$ 500.00/Ea.
$
1,000
36
Ea.
$1000.00/Ea.
$
36,000
2
Ea.
$1800.00/Ea.
$
3,600
14
Ea.
$2000.00/Ea.
$
28,000
2
Ea.
$4500.00/Ea.
$
9,000
2
Ea.
$5500.00/Ea.
$
11,000
4
Ea.
$1800.00/Ea.
$
7,200
9
Ea.
$1600.00/Ea.
$
14,400
3
Ea.
$1800.00/Ea.
$
5,400
1
LS
$ 50,000/Ea.
$
50,000
69,500 LF
$ 3.00/ft
$
208,500
9. Improve Existing
Drainage Ditches
12,180 LF
$ 5.00/ft
$ 60,900
1O.Repair & Clean
Curb & Gutter
47,460 LF
$ 1.00/ft
$ 47,460
Sub-Total...........................................$1,364,472
III. Elkcam Waterway
1. Complete Seawall
9,850 LF
$ 125.00/ft
$1,231,250
2. Drainage Control
Structure
1 Ea.
$300,000/Ea.
$ 300,000
Sub-Total...........................................$1,531,250
Hr. Robert S. McClary
November 30, 1990
Page 7
Item Quantity Unit Cost
IV. Wentworth
Drainage Ditch
1. Fill Existing Ditch 12,963 Cu.Yd. $ 4.00/CY $ 58,334
2. Reconstruct New
Drainage Ditch 13,000 Cu.Yd. $ 3.50/CY $ 45,500
Sub -Total ...........................................$ 103,834
Sub -Total Items I, II, III & IV .....................$3,220,256
Construction Contingency (10%) ......................$ 322,000
Total Cost..........................................$3,542,256
Roadway replacement includes new asphalt and coquina base.
The existing soil cement base is proposed to be used for the
required stabilized subgrade.
The herein cost estimate is based on a limited amount of time in
the field. During construction, as items are uncovered,
additional required improvements may be discovered. The unit
costs for pavement replacement does not include fill nor new
subgrade construction.
We are available to meet and discuss any aspect of this report at
your earliest convenience.
Should ou require further information, please call.
Very /ru y 6u
Randy, Mosby, E.
RLM:bes
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