Item 4FItem 4F
ICITY OF
SOUTHLAKE
MEMORANDUM
(December 4, 2018)
To: Shana Yelverton, City Manager
From: Rob Cohen, Director of Public Works
Subject: Award a construction contract for the Patterson Pond Spillway
Repair project to GRod Construction in an amount not to
exceed $243,000.
Action
Requested: Award a construction contract for the Patterson Pond Spillway
Repair project to GRod Construction in an amount not to exceed
$243,000.
Background
Information: The Patterson's Pond subdivision is located off of N Kimball
Avenue near Patterson Way. The retention/detention pond has
been a topic of discussion for several years. The pond is fed by the
west fork of Jones Branch and, over the past several years, has
seen an increase in water flow due to upstream development. The
increased water flow has caused erosion to and around the pond
spillway and poses a risk to City infrastructure, specifically a waste
water lift station, located downstream.
The proposed repair of the spillway and placement of rock riprap
within the downstream creek bed is intended to correct and mitigate
future erosion concerns, as well as prevent damage to the existing
City's infrastructure. As per the City's Storm Drainage Policy,
section 9.02, the City is responsible for the maintenance of all
surface structures within a drainage easement, while the
landowner(s) shall maintain all portions of the drainage easement
which are not improved.
The design for these repairs was prepared by Halff Associates, Inc.
GRod Construction will regrade the area around and downstream
from the spillway, conduct repairs to the existing concrete spillway
and place rock riprap channel stabilization in the downstream creek
bed.
The project will consist of regrading the area around and
downstream from the spillway, repairs to the existing concrete
Item 4F
spillway and placing a rock riprap channel in the downstream creek
bed, which has been compromised by erosion. Two (2) bids were
received on Tuesday, October 30, 2018. The bids have been
reviewed by Halff Associates, Inc. and City Staff. Bids from Grod
Construction, LLC ($197,131) and Fort Worth Civil Constructors,
LLC ($387,802) were evaluated. The recommended contract
award amount for the base bid is $243,000 to GRod Construction.
This amount includes the base bid amount, 2 bid alternatives that
will be decided upon in the field based on site conditions, plus 10%
contingency.
Financial
Considerations: The Patterson's Pond Spillway Repair would be funded from the
Storm Water Utility System Fund in the FY 2017 Capital
Improvement Program and is within budget.
Strategic Link: The Patterson's Pond Spillway Repair links to the City's strategy
map relative to the focus area of Infrastructure. The specific
corporate objectives that are met by this construction project are to
(F1) Adhere to financial management principles & budget and (F2)
Invest to provide & maintain high quality public assets.
Citizen Input/
Board Review: The repair of the Patterson's Pond spillway has been a topic of
discussion for several years with the Patterson's Pond HOA.
Legal Review: This is the standard construction services contract that has been
previously reviewed by the City Attorney.
Alternatives: The Council may award the contract to GRod construction or reject
all bids.
Supporting
Documents: Halff Associates, Inc. Opinion of Probable Cost
Project Bid Tabulation
Half Associates, Inc Bid Selection Recommendation
Staff
Recommendation: Award a construction contract for the Patterson Pond Spillway
Repair project to GRod Construction in an amount not to exceed
$243,000.
Staff Contact: Rob Cohen, Director of Public Works
Kyle D. Hogue, P.E., Deputy Director/City Engineer
Hunter Harris, Project Manager
mom HALFF
Engineer's Statement of Probable Construction Cost
for
Patterson's Pond Spillway Rehabilitation Preliminary Design
City of Southlake, Texas
Prepared by Halff Associates, Inc.
Date: September 24, 2018
AVO: 32884
ITEM NO.
DESCRIPTION
UNITqTY
Engineers Estimate
UNIT PRICE
EXTENDED
PRICE
BASE BID
1 Mobilization
LS
1
$35,000.00
$35,000.00
2 SWPPP, Rock Filter Dam, Construction Enterance (install & remove)
LS
1
$17,750.00
$17,750.00
3 Permanent Turf Reinforcement Matting
SY
45
$12.00
$540.00
4 4 -inch Topsoil & Sodding
SY
235
$6.00
$1,410.00
5 4 -inch Topsoil & Seeding
SY
620
$3.00
$1,860.00
6 General Site Preparation
LS
1
$35,000.00
$35,000.00
7 Tree Removal
LS
1
$20,000.00
$20,000.00
8 Unclassified Channel F�ccavation
CY
345
$30.00
$10,350.00
9 Rock Riprep (DW = 12 inches, t= 18 inches)
SY
135
$130.00
$17,550.00
10 Concrete Riprep
SY
418
$155.00
$64,790.00
111 Concrete Connection
LS
1
$2,000.00
$2,000.00
12 Fence
LF
15
$25.00
$375.00
Subtotal Base Bid
-
$206,625.00
Contingencies (15%)
$30,993.75
BID ALTERNATIVE 1
1318" SS Concrete Encasement I
LF 1
25
$100.001
$2,500.00
Subtotal Alternative 1
Contingencies (15%)
$2,500.00
$375.00
BID ALTERNATIVE 2
Permanent Turf Reinforcement Matting
SY
845
$12.00
$10,140.00
4 -inch Topsoil & Seeding
SY
845
$3.00
$2,535.00
Tree Removal
LS 1
1
$10,000.001
$10,000.00
Subtotal Alternative 2
$
Contingencies (15%)
$3,876.00
$3,401.26
TOTAL
$266,670.00
NOTE: This statement was prepared utilizing standard cost and/or estimating practices. It is understood and agreed that this is a statement of probable construction
cost only, and the Engineer shall not be liable to the Owner or any Third Party for any failure to accurately estimate the cost and/or quantities for the project, or any
pan thereof.
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—
... HALFF
November 6, 2018
AVO 32884
Mr. Kyle Hogue, P.E,
City Engineer/Public Works Deputy Director
City of Southlake
1400 Main Street
Southlake, Texas 76092
Re: Patterson's Pond Spillway Repair
Dear Mr. Hogue,
Bids were opened on the above -referenced project on Tuesday, October 31, 2018, 10:00 am at the City of Southlake.
Two (2) bids were received and GRod Construction, LLC submitted the low bid, with a bid of $197,131.00.
Guillermo Rodriguez is the owner\operator ofGRod Construction. Halff worked with Guillermo Rodriquez while
he was a project manager for a different contractor (2008 — 2013) and he was accommodating to the needs of the
project and responsive, Halff has worked with Guillermo Rodriquez and GRod Construction on the Point Vista
Road at Turbeville Road Project in the Town of Hickory Creek. GRod has been accommodating on helping the
Town through utility conflicts and proactive with progressing this project.
GRod Construction, LLC has experience with paving, drainage, and utility project. They summited three (3) years
of experience record from current (November 2018) to October 2015, with a majority of the experience in paving.
Halff Associates has been consulting engineer on several of the projects listed, GRod Construction performed as
a paving subcontractor for three Tarrant County Community College projects, GRod Construction acceptably
performed the services as outlined in the construction documents and specifications.
Our discussion with references was limited but provided positive feedback, Halff spoke with John Henderson,
Construction Inspector, City of Sanger, November 6, 2018. GRod Construction performed work on several types
of projects, utility point repair and paving improvements. Mr. Henderson noted that they were knowledgeable,
responsive and place pride in their work.
In conclusion, based on our review, we see no reason(s) that leads us to believe GRod Construction, LLC cannot
successfully complete the project, Based on our research, it is the opinion of HalffAssociates, Inc. that there is no
apparent reason to disqualify the bid proposal of GRod Construction, LLC for the Patterson's Pond Spillway
Repair.
Please feel free to call Inc at (817) 764-7508 if you have any questions or comments.
Sincerely,
HALFF ASSOCIATES, INC.
Levi Hein, PE, CFM
Project Manager
HALFF ASSOCIATES, INC.
4000 FOSSIL CREEK SOULEVAND TEL (81))84)9422 WWW.HALFFCOM
FORT WORTH, TX 76137-2720 FAX (811) 232-9784