Repairs for the Sycamore Canyon Creek Project


SCH Number
Public Agency
City of Diamond Bar
Document Title
Repairs for the Sycamore Canyon Creek Project
Document Type
NOE - Notice of Exemption
Document Description
The project was caused by a storm runoff event in 2017 and includes the work needed to repair the damaged area of Sycamore Canyon Creek. This natural channel extends through the City Park and runs east to west. The damaged area of the creek is located near the rear parking area downstream of the concrete culvert crossing the park maintenance road. It is located within a concrete-lined section where the storm event had dislodged a tree growing within the channel concrete side-wall along the south side of the channel. The channel where the tree had fallen caused a portion of the concrete lining to break and created a void in the sidewall susceptible to future channel failures. The repair to the creek lining will consist of saw cutting, removing, and properly disposing of the existing concrete/shotcrete creek surface. Upon direction of the City arborist, any needed tree roots will be pruned. Then the creek lining will be reconstructed per the City requirements. The sidewall repair will involve excavating the underlying soil to remove sediment deposits and compacting imported backfill material to rebuild the creek slopes to match the existing creek profile.

Contact Information

Christian Malpica
Agency Name
City of Diamond Bar
Job Title
Associate Engineer
Contact Types
Lead/Public Agency / Project Applicant

Brian Nieckula
Agency Name
Job Title
Engineer - Principal in Charge
Contact Types
Parties Undertaking Project

Diane Jenkins, AICP
Agency Name
Environmental Consultant
Job Title
Planning Manager
Contact Types
Parties Undertaking Project


Diamond Bar
Los Angeles
Cross Streets
Golden Springs Drive/S Diamond Bar Boulevard
Total Acres
Parcel #
State Highways
Pomona Freeway SR 60
Lorbeer & Chaparral Middle & Maple Hill Elementary
Subject site is Sycamore Canyon Creek
San Dima

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Class 1 Existing Facilities Section 15301
Reasons for Exemption
The proposed project qualifies for an exemption from the California Environmental Quality Act (CEQA) under Section 15301 (d), Class 1 Existing Facilities. CEQA Guidelines list classes of projects that have been determined not to affect the environment significantly and, as a result, are exempt from review under CEQA. Among the classes of projects that are exempt from CEQA review are those projects that are specifically identified as existing facilities. CEQA Guidelines, Section 15301 defines Class 1 consisting of the operation, repair, maintenance, per-mitting, leasing, licensing, or minor alteration of existing public or private structures, facilities, mechanical equipment, or topographical features, involving negligible or no expansion of existing or former use. The types of “existing facilities” itemized below are not intended to be all-inclusive of the types of projects which might fall within Class 1. The key consid-eration is whether the project involves negligible or no expansion of use. For this particular project, 15301 (d) is applica-ble: Restoration or rehabilitation of deteriorated or damaged structures, facilities, or mechanical equipment to meet current standards of public health and safety, unless it is determined that the damage was substantial and resulted from an envi-ronmental hazard such as earthquake, landslide, or flood. As a result, the project qualifies for a Categorical Exemption pursuant to the CEQA’s requirements for an “existing facility” within an urbanized area.
County Clerk
Los Angeles


Notice of Exemption

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