1879 Portola Road
Suite G
Ventura CA 93003
Tel 805.644.5100
Fax 805.644.5179
June 8, 2022
City of Santa Clarita
Attention: Mrs. Carla Callahan
20880 Center Point Parkway
Santa Clarita, California
Project: Vista Canyon Multi-Modal Center Train Station Santa Clarita, California
Subject: Budget Increase
Mrs. Callahan,
As you are aware, we have exceeded our budget in providing special inspections and material testing for the subject project. There are several reasons for going over the budgets that are discussed below and the accompanying table provides a comparison of the original budget and the additional budget requested:
• Grading Observation and Testing: During the start of the project and grading on the east end , undocumented fill material was encountered . This condition caused an additional month of grading by removing the undocumented fill and replacing with approved clean material. Additionally, during the backfilling of the Plaza walls, the backfill material did not meet the project specifications and import fill was needed. This condition resulted in several field sampling of possible sources and lab testing of those material for compliance with project specifications .
• Cast in Place Drilled Holes (Caissons) : During drilling of the caissons for the Stable Bridge , unforeseen conditions were encountered. Those included presence of water at depths and oversized boulders that caused out of plumb caissons. These conditions caused drilling, backfilling with slurry and re-drilling of the holes that added about two months of inspection time. • Shop Welding Inspection: During shop inspection of structural steel, several design changes were issued, and new structural frame members were added which resulted in about two months of additional shop inspections. • Standby Weekend Work: So far, on three weekends, our staff worked continuous shifts to accommodate the need for weekend shut down of certain railways. These added overtime and double time.
1879 Portola Road
Suite G
Ventura CA 93003
Tel 805.644.5100
Fax 805.644.5179
The following table provides the original estimates and the additional estimated budget to complete the quality assurance for the project:
Task Original
Estimate(hr)
Current
Estimate (hr)
Hourly
Rate
Amount
Grading 600 350 $104 $36,400
Field Inspection
(Concrete-Masonry)
100 300 $104 $31,200
Shop
Inspection(welding)
150 200 $110 $22,000
Field Inspection
(welding and bolting-
NDT)
150 200 $110 $22,000
Laboratory Testing NA 1-Lump Sum Lump
Sum
$6,000
QSP Inspection 500 200 $145 $29,000
Project Management 200 70 $165 $11,550
Total
$158,150
Therefore, we request a budget increase in the amount of $158,150. We appreciate the opportunity to be of service on this project.
TWINING, INC.
Jeff Tawakoli, P.E.
Ventura Branch manger