CC - Criterion Land Management ReportChris Johnson
From: Sonya Allen
Sent: Thursday, December 13, 2018 12:54 PM
To: C.Jay Coles; Charlene Way; Chris Johnson
Cc: Joe Bongiorno
Subject: Shelburne East - Bridge on Bott Ln.
Attachments: Bridge Assesment.pdf; Structural Load Recommendation letter.pdf
Clerk - Please include this email and attachments in the public record. Thanks
------ Original message ------
From: Jesus Tovar
Date: Thu, Dec 13, 2018 10:48 AM
To: Joe Bongiorno;
Ce: Carpenter, John;Parks, Shon;
Subject:Bott Lane Bridge, Shelburne East
Mr. Bongiorno,
Attached for your records are the reports for the Sott lane bridge crossing the tenmile for the Shelburne East
Subdivision, as discussed previously, only a Single axle fire truck will be able to access the project from this crossing
until the new bridge has been put in.
Jesus Tovar
Project Manager
Criterion Land Management, LLC
7440 E. Pinnacle Peak Road, Suite 142
Scottsdale, Arizona 85255-3638
Office: 480-401-0800
Email: Jesus@criterionland.com
www.pinnaclelanddevelopment.com
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CRITERION PINNACIE
LAND MANAkIEREdT LLt' La Ad 012weropaaent rlc
MATERIALS
TESTI NG &
INSPECTION
❑ Environmental Services ❑ Geotechnical Engineering
BHB Consulting Engineers
Darren Truchot
390 E Corporate Drive, Suite 104
Meridian, ID 83642
PAGE #1 OF 1
September 12, 2017
rAboise\2018 reports\1600-1799\b181734c - bott lane bridge gpr,
meridian, id\mti b181734c gpr nov 13 2018 body.dou
❑ Construction Materials Testing ❑ Special Inspections
Project: Ground Penetrating Radar Survey
Bott Lane Bridge
Inspector: Cade Beck
Inspection Dates: November 13', 2018
GPR INSPECTION REPORT
Materials Testing & Inspection has completed the limited Ground Penetrating Radar (GPR) survey to identify
rebar in support beams under a bridge crossing the canal on Bott Lane. There were four beams that were 3" thick.
The beams contained a top, middle, and bottom rebar across their length with ties at 12" on center. See attached
photo.
MTI used a GSSI StructureScan Optical GPR device equipped with a 2.0 GHz antenna and TerraSIRch SIR -3000
digital control unit, which is capable of locating and imaging rebar and other targets in concrete slabs, decks,
walls and masonry. The dielectric constant for this concrete was assumed to be roughly 6.25 (dielectric is unit -
less). Sampling rate was 16 bits/sample, 256 samples/scan, and 90 scans/foot. Some limitations of the technology
exist depending upon the situation. Though not a foolproof system, the technology provides information on the
location and depth of objects accurate to within'/4 of the radar wavelength, which equates to a spatial resolution
of roughly'/4-inch for a 2.0 GHz system. As with any Non -Destructive Evaluation (NDE) technique, interpretation
of data is key to achieving accurate results. Because of inherent limitations with GPR, MTI cannot warranty our
findings and is providing this service for information purposes only.
MTI appreciates this opportunity to be of service and looks forward to a continuing relationship as your concrete
and NDE expert. If you have questions concerning this report, please contact us at (208) 376-4748.
Respectfully submitted,
MATERIALS TESTING & INSPECTION, INC.
G 4 IV,
Cade Beck
NDE Specialist
Attachments: Photographs
2791 S. Victory View Way • Boise, Idaho 83709 • (208) 376-4748 • Fax (208) 322-6515
mti@mti-id.com • www.mti-id.com
Bott Lane Bridge, Meridian
Photo Appendix Page 1 of 1
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December 12, 2018
Criterion Land Management LLC
BHB STRUCTURAL 7440 E. Pinnacle Peak Rd.
390 E. Corporate Drive
Ste. 104 Suite 142
Meridian, ID 83642 Scottsdale, Arizona 85255-3638
p. 208 8917157 RE: Bott Lane Bridge, Meridian Idaho
bhbengineers.com
To Whom It May Concern,
The Bott bridge is approximately 18 ft long by 16 ft wide and constructed out of two
precast Double Tee sections. Drawings of the double tee were not available, so I had
MTI performed a Ground Penetrating Radar (GPR) on the bottom tee to verify the rebar.
GPR is not accurate enough to determine the size of the rebar, but it does give a profile
and spacing of the rebar. Knowing the spacing and profile of the rebar and the
dimensions of the bridge I was able to run a few options on what the size of rebar would
most like be. The governing factor was the amount of shear steel required to the amount
of shear steel provided. Analyzing the double tee section with these parameters
provided a maximum axle load of 31,000 lbs.
This would accommodate all single rear axle fire trucks, except an aerial Ladder truck
that has a maximum rear axle load of 33,500. No double rear axle fire trucks would be
allowed.
If you have any further questions do not hesitate to contact our office.
Best regards, MMS_
O ST~`
Darren Truchot, PE
Principal, BHB Consulting Engineers, PC ,12/12/201 &
OF
D. 1
BHB = RESPONSIVENESS + COORDINATION + CREATIVITY