HomeMy WebLinkAbout2008-275Board of County Commissioners
180127th Street
Vero Beach, Florida 32960
Telephone: (772) 567-8000 FAX: (772)-778-9391
Field and Laboratory Quality Control (QC)
for
53 Id Street Roadway Improvements
IRC Project No. 0107
WORK ORDER NO. 7 (Engineering Division)
FOR
FOR PROFESSIONAL GEOTECHNICAL SERVICES AGREEMENT
FOR ANNUAL GEOTECHNICAL SERVICES CONTRACT NO. 0534
WITH
DUNKELBERGER ENGINEERING & TESTING, INC.
All services performed under this contract shall be supervised and certified by a licensed
Professional Engineer (PE) registered with the State of Florida and staff employed directly with
your firm.
Scope of Services
All work shall be performed on a unit price basis in accordance with the attached Scope of
Services dated August 29, 2008 and shall comply with Standards enumerated in the RENEWAL
OF THE ANNUAL GEOTECHNICAL SERVICES CONTRACT, IRC PROJECT NO. 0534 WITH
DUNKELBERGER EGINEERING & TESTING, INC. Effective Date: October 1, 2007.
Minimum Specification Requirements as follows:
Roadway and Drainage Construction
• Boring layout and utility clearance
• Field Exploration
• Laboratory testing
• Engineering analysis, preparation and submittal of draft report
• GPR test pit specialty testing
• Finalize report
All work shall also comply with the current Florida Minimum Technical Standards.
COMPENSATION.
The COUNTY agrees to pay, and the Geotechnical Professional agrees to accept, a fee for
services rendered according to the "Scope of Services" identified in the attached EXHIBIT "A"
Fee Schedule and Man Hours.
wo# 7
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Agenda 53
St W09 7 Dunkelberger 9-1-08.doc
53`d Street Roadway Improvements
IRC Project No. 0107
A Not -to -Exceed Amount of:
_$16,572.50 to be paid ori r, unit I'tice hasis for tit,ia_ral �rrclri
performed in accordance with the schedule of services aiut fet -s set forth !n Exhibit A of
RENEWAL OF THE ANNUAL GEOTECHNICAL_ SE=RV1(;L � C;C)iJ I RAC I Ifs(; PRt�,IC_t; No
--— — - - - _
0534 WITH DUNKELBERGER EGINEERING & iESTINC� INt; I.tf'c rtiv(--.a i cte)llt-r 1
2007.
TIME FOR COMPLETION
This Work Order No. 7 shall run concurrently with the cot slruction wt:ark lof 1l�1��
53rd Street Roadway Improvrnents
IRC Project No. 0107
IN WITNESS HEREOF the parties hereto have ex(-cuierl I;�rrt;
This 9th day of _ Sept,ernber
OWNER
BOARD OF COUNTY COMMSIONERS
INDIAN RIVER COUNTY, FLORIDA
.4 04k,
'i,�nnhrrP'
Sandra L. Bowdca:, Chah m:an
ih-i +ed nume .md r(ilr!
Approved by IW(' Sepl;erAx-ltr' �), 200')
ATTEST:
Jeffrey K. Barton, CIerK of Gircuit Court
Deputy Clerk
Approved as to For and Su ncy
C , illiam G. Co fins III,, County Attorney
J' eph A. Ba d, County Administrator`
DUNKELBERGER ENGINEERING �A
TESTING, INC.
H
r
�« �..`
�'� ��1<r I • .�'�
Witnessed by:
(h olwt/ n<ntrt i
("..f)oiument s and Set!I n_. 1)I1 1 J 1 1.., .. I c u I],, i I \I I[ :.i 1,L,i iII I I I.:(I ''LAT I
.Indian River County
180.1 27`1' Street
Vero Beach, 'Florida 32960
Attention. Mr, Michael D. Nixon, P E.... via entail
Roadway Production Manager
August 29, 2008
Project No. PSL -08-2558 (BG 11A)
Subject; Proposed Geotechnical Services .
Improvements to 53`d Street & Old Dixie Highway
Indian River County, Florida
Dear Mr. Nixon.
INTRODUCTION
D inkelberger Engineering & Testing, Inc. (Dunke.lberger) is pleased to submit this proposal for
the above referenced project. Our work scope into complete ai roadway soil survey and structure
investigation generally following the guidelines outlined in the current FDOT Soils and.
Foundation Handbook (2006).
PROJECT CONSIDERATIONS
The project will involve an. approximately 4,000 lineal feet of improvements to 53'd Street and
1,960 lineal feet of improvements to Old Dixie Righway ui Indian River County, Florida. The
53'`d Street improvements will begin at the east side of the -Lateral "H" Canal (Station 384+04.66)
and extend eastward to Indian River Boulevard (Station 424+00). The section of road extending
from Lateral "H' Canal to Old Dixie Highway will consist of new 4 -lane divided roadway. The
section of existing 24ane roadway extending from Old Dixie Highway to Indian River
Boulevard will be widened from 24ane to to 4.1ane divided roadway.
Of note is an approximately 1,100 -foot stretch of the proposed 53d Street between approximately
Station 387+00 and Station 398+00, An unimproved roadway presently exists along this section
of roadway, with former borrow lakes being located on both sides. We understand that it is
uncertain if this section of unimproved roadway was constructed before or after the excavation of
the lakes. The composition of the unimproved roadway embankment is also unknown. The
unknown quality and composition of the embankment fill, combined with the plans to place 6 to
9' feet of new fill over the existing embankment, poses concern for the construction and long
term performance of new road.
The Old Dixie Highway improvements will begin approximately 1,080 feet south of 53`a Street
(Station 89+47.58) and extend to approximately 880 feet north of'53`d Street. The improvements
to Old Dixie Highway will consist of adding turn lanes to thea existing 2 -lane roadway.
State of Florida Board of Professional Engineers Authorization No. 6B70
Toll -Free: (877) 64M832
Indian River CatmW Page 2
Improvements to 5?1 Sireet cK Old Dixie Higlrivay Project No,.PSL-08-2558 (BG 11.4)
The following items will also be incorporated into the design of the roadway improvements:
+ One wet pond is planned between Old Dixie Highway and U.S. Highway 1 at the
southern end of the Old Dixie improvements,
• Two dry retention areas are planned at the eastern end of the 53`d Street improvements.
• Mast arms will be installed for signalization at the intersections of 53rd Street with Old
Dixie Highway, U.S. Highway 1,, the Publix access Road, and Indian River Boulevard.
SCOPE OF STUDY
Our geotechnical study will be conducted to characterize the subsoil and groundwater conditions
along the roadway alignment, and at the stormwater treatment .and mast aim locations. Our
geotechnical work for this project will consist of the following components:
Document Review
1. Review of S.C.S. maps. for native shallow soils types within the project alignment,
2. Review of historical aerial photographs to look .far features and/or tonal reflections
that may be indicative of pits, ponds, sloughs and other such areas considered to be
geotechnical concerns. The review will .also attempt to identify the sequencing of the
ununproved roadway and lake formation.
Field Ex0oration
Roadwgy Soil Survey
1, Exploration of the shallow subsurface conditions along the roadway alignment with
soil borings using a truck -mounted drilling rig or hand -turned augeiing equipment.
We will perform 6 foot deep auger borings at about 200400t centers along the
roadway following an alternating roadside pattern.
2. In the stretch of unimproved roadway between the two :lakes, the auger borings will
be substituted with 204bot deep Standard Penetration Test (SPT) borings drilled at
approximately 1.00400t centers. The SPT borings provide more detailed data on soil
composition and,density, mid also allow for -assessment of voids through drilling fluid
return.
3. Ground Penetrating Radar (CrPR)' survey of the unimproved roadway between the
I akes maybe utilized to fiurther assess the existing embankment fill, depending on the
SPT boring findings.
4, Excavation of test pits into the existing embankment fill may be utilized to further
assess the existing embankment fill, depending on the finding of the SPT borings.
Dunkelberger
Indian RAYer Cowlty
InlProvements. to 5 3"' Street & Old Dixie f11ghivay
Page 3
Project No. PSL -08-2558 (BG 11.1)
We understand.. that the County will provide a backhoe/trackhoe to perform the test pit
excavations, and therefore, costs associated with rental of such equipment have not
been included in this proposal
Thiii-walled tube soil samples may be obtained during the drilling operations if soft
cohesive soils are identified by the borings drilled in the unimproved roadway. The
thin-walled tube .samples would be used to perform laboratory consolidation testing
for evaluation of potential magnitude and time rate of settlement.
6. Groundwater levels will be measured in each of the boreholes upon thein completion,
and again after an approximate 24-hour period to allow the water table time to
stabilize, when possible. Additionally, we plan to install 6 -foot deep temporary
piezometers at. approximately '1,0004bot centers (excluding the- unimproved roadway
section between the lakes) to measure the watertable levels over a period of time to
help establish the range of groundwater fluctuations.
7. Six (6) soils samples will be collected for corrosion series testing.
Pond Areas
1. Explore the subsurface conditionsat the wet pond site with two (2), 20400t deep SPT
borings. Explore the subsurface conditions at the two dry pond sites with four (4),
1 Moot deep SPT borings. The pond SPT borings which are not utilized for
piezometer construction will be grout sealed after their completion. The SPT borings
that will be drilled for the proposed wet pond location may need to be drilled within
the roadway right of way, adjacent to the pond due to access issues (area was flooded
at the time of this proposal),
2. Conduct two (2) field permeability tests to assess the hydraulic conductivity of the
subsoils within. proposed dry pond areas. The tests will be conducted in 10 -foot deep
boreholes utilizing the SFWMD open hole, constant head test method.
3. Install two (2), 10 -foot deep temporary piezometers, one in the wet pond- and one in a
selected dry pond site. Obtain groundwater readings in the piezometers once per
week for 3 weeks.
4. Two (2) soil samples for Limerock Bearing Ratio (LBR) testing will be collected
from proposed pond areas.
Mast Arms
1. Explore the subsurface conditions at the 53,d Street intersection with U.S. Highway 1
with four (4), 35 -foot deep SPT borings, one drilled at each corner. Explore the
subsurface conditions at each ofthe 53rd Street intersections with Old_Dixie Highway,
the Publix access road and Indian. River Boulevard with two (2), 35 -foot deep SPT
borings drilled at diagonally: opposite corners (if feasible).
Dunkelberger
Indian River County
b)Iprot)evIeirts to 53"' Street & Old Dixie Highwg7
Laboratory Testing
Page 4
Project h'o. PSL -08-2558 (BG 11.4)
1. Laboratory examination (classification) of the material samples and physical property
tests of same to establish their plasticity, gradation, organic content, moisture content,
LBR and corrosion potential. Consolidation testing; may be performed on soft
cohesive soils should they be identified in the borings conducted in the unimproved
roadway section.
Reporting
L Preparation and submittal of a report that presents results for the roadway soil survey
and structures investigation as detailed in Chapter 9 of FDOT's Soils and Foundation
Handbook (2006). The report will address plastic and/or organic soils (limits and
volume), if present, projected water table levels, and design/constiuction options to
deal with plastic/organic soils and perched water (e.g., medians). The report will
include cross-sectional profiles of the subsurface conditions with soil classifications.
Our geotechnical budget does not include costs for rental of earth moving equipment to access
heavily vegetated or un -level terrain areas. Our intent will be to adjust the boring locations so as
to avoid the need for clearing activities.
Where necessary, we assume that access to the roadway aligrunent through private properties
will be coordinated by the County.
We strongly recommend that the -project surveyor survey the horizontal uric/ vertical positions
of the borings and piezoinetersm This data (elevations) is key to establishing cut depths for
unsuitable soils and tit seasonal /high ground;vater levels (elevations).
SCHEDULE
Following receipt of your written authorization to proceed, we estimate that aur schedule for the
geotechnical work will be as follows:
• Project start=up, boring layout and utility clearance —1 week
• Field exploration -2 weeks
• Laboratory testing —2 -to 3 .weeks
•Engineering analysis, ,preparation and submittal of draft report — 2 weeks
• Finalize report - 1 week
SCHEDULE TOTAL: 8 to 9 weeks
Dunkelberger
Indian River Counoy Page 5
Improvements to 53"1 Street & Ohl Dixie Highway Project No. PSL -08-2558 (BG 11.4)
COMPENSATION
Based upon our interpretation of the project requirements; we propose an estimated not4o-
eaceed. fee budget of $36,572.50 for our work. Of this, $5,255 is contingency to cover possible
GPR, test pit and specialty laboratory testing work in the unimproved roadway section. An
itemized breakdown of our budget for performance of the previously described work is provided
on Attaciunent A.
Other terms and conditions related to the engagement of our services shall be in accordance with
the terms of the Master Agreement for continuing Professional Services between Dunkelberger
and Indian River County renewed on October 1, 2007.
oo0
We trust that this information is clear and understandable. We understand that the County will
issue a workauthorization. Please ,feel free to call if you need any clarification regarding this
matter, or if you need any additional information.
Sincerely,
331NERING & TESTING, INC.
Chris L. Mings, P.E.
Senior Geotechnical Engineer
Attachment: A � Fee Breakdown
Dunkelberger
President
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