ORDER NO. 30161
INSPECTION OF FLAT ROCK LAKE DAM AND INGRAM DAM
Came to be heard this the 26th day of February, 2007, with a motion made
by Commissioner Williams, seconded by Commissioner Oehler. The Court
unanimously approved by vote of 4-0-0 to:
Approve the revised Proposal on inspecting Flat Rock Lake Dam and
Ingram Dam, and that we have the Auditor prepare a Budget Amendment for
$24,600, with those funds being transferred from the Flood Control account
for this purpose.
30/ (o /
1?j COMMISSIONERS' COURT AGENDA REpUEST
PLEASE FURNISH ONE ORIGINAL AND NINE COPIES OF THIS REQUEST AND DOCUMENTS TO BE
REVIEWED BY THE COURT.
MADE BY: Commissioner Williams
MEETING DATE: February 26, 2007
SUBJECT: (PLEASE BE SPECIFIC)
OFFICE:
TIME PREFERRED:
Consider, discuss, and take appropriate action to approve revised proposal on inspecting Flat Rock
Dam and Ingram Dam.
EXECUTIVE SESSION REQUESTED: (PLEASE STATE REASON)
NAME OF PERSON ADDRESSING THE COURT:
ESTIMATED LENGTH OF PRESENTATION:
IF PERSONNEL MATTER -NAME OF EMPLOYEE:
Commissioner Williams/Stefan Schuster
Time for submitting this request for Court to assure that the matter is posted in accordance with Title 5, Chapter
551 and 552, Government Code, is as fo]lows:
Meeting scheduled for Mondays:
THIS REQUEST RECEIVED BY:
THIS REQUEST RECEIVED ON:
5:00 P.M. previous Tuesday.
~~,
All Agenda Requests will be screened by the County Judge's Office to determine if adequate information has been
prepared for the Court's formal consideration and action at time of Court Meetings. Your cooperation will be
appreciated and contribute towards you request being addressed at the earliest opportunity. See Agenda Request Rules
Adopted by Commissioners' Court.
February 22, 2007 ~y
I I 1 ~ r~ ~,,U,
`~/ W
Mr. William "Bill" Williams /'~.,
Commissioner Precinct No. 2
Kerr County
700 Main
Kerrville, Texas 78028
Re: Kerrville Lake Dam, (Flat Rock Dam) and Inge
REVISED Concrete Cap Integrity Investigation
Dear Mr. Williams:
We are pleased to submit this revised letter detailing a proposed scope of work for
evaluating the integrity of the concrete caps on Flat Rock Dam and Ingram Dam.
Following the February 12, 2007 Kerr County Commissioner's Court meeting, we
solicited several additional firms specializing in non-destructive testing (NDT) to gather
more information on price and work efficiencies. After these evaluations, we continue to
endorse the firm of Olson Engineering, Inc. of Colorado. We have worked with the firm
in the past and believe they can provide a quantitative assessment of the concrete caps'
integrity with the earthen foundations. The firm also believes the work can be completed
on both dams without doubling the budget. The present $18,000 for this project would
need to only increase by 30% to include the second dam.
In a second construction and design phase, following the NDT assessment, Freese and
Nichols, Inc. would work with the information provided by Olson to develop repair
procedures and estimated quantities for effective repairs. Essentially, once the extern of
voids are identified on the crest and downstream slope, we would develop a grouting
approach to restore contact between the concrete and the supporting foundation through a
grout matrix of cementitious materials or perhaps other fillers. Extreme caution must be
exercised when grouting beneath the concrete cap to prevent inadvertently lifting it from
the foundation. The upstream concrete slab could be evaluated if the reservoir can be
lowered temporarily to allow access to the testing equipment. Otherwise, the grouting
procedures will be developed to produce as much flow as possible towards the upstream
slab in an attempt to seek and fill any voids under the upstream slab near the crest.
The following scope of work is presented and man-hours of anticipated effort are
developed in an attached spreadsheet. We have placed pricing along with the man-hours.
Scope of Services
Freese and Nichols, Inc. will render the following professional services in connection
with the development of the project:
1. Coordinate the non-destructive testing (NDT) of the concrete cap (crest and
downstream slabs above water levels) with firm selected and engaged by
Freese and Nichols, Inc.
2. Establish survey requirements for layout work necessary for the NDT firm to
properly identify their testing sites.
3. Observe the NDT by Olson.
4. Submit a report of assessmern activities and recommended design procedures to
the Kerr County Commissioner's Court.
We aze attaching a spreadsheet (Attachment C), which presents our estimated man-hours
for each of the above tasks. We are available to discuss the proposed approach and can
provide some approximate estimates for the work efforts we would expect to be
performed by others mentioned above. We sincerely appreciate this opportunity to
provide professional engineering services to Kerr Coumy or to provide additional
qualifications in the event the work goes out for solicitation. Please call me at 512-451-
7955 if you have any questions or comments.
Sincerely,
Freese and Nichols, Inc.
Freese and Nichols, Inc.
M. Leslie Boyd, P.E.
Associate
Stefan Schuster, P.G.
ATTACHMENT C
Flat Rock Dam and Ingram Dam
Kerr County, Texas
Concrete cap integrity evaluation
Manhour Estimates Freese and Nichols Services
		Hours
Task	Descri tion	Princi I	Pro Mgr	En r IV	CADD	Geoi
Subcontract	Olson Engr.					
1	Coordination NDT		4			2
2	Estab survey req'mts		4	1	4	
3	Observe NDT		18	8		
4	Report and Recommendations		8	2	2	
Totals
Amount
0 32 11 B 2
0 $ 5,280.00 $1,540.00 $ 450.00 $ 320.00
00'0097Z$ Ig1ol
00'042 $
00'OLL`96 $ 4