Project Correspondence

Recent discussions on drainage and survey work

MR

M. Reyes · Field Crew Lead

2 days ago

Survey

The total station data from the Baloyi Pine lot came back with a 0.4 ft discrepancy along the western boundary. I rechecked the backsight and the control point appears stable. Can we schedule a re-shoot before we finalize the trench alignment?

Attachments: 2 · Priority: high
CD

C. Duarte · Project Engineer

5 days ago

Modeling

I ran the 2D hydraulic model for the 25-year storm using the updated rainfall intensities. The existing culvert under Pine Avenue overtops by about 1.2 ft. We need to either upsize the barrel or add an overflow weir upstream. Attached are the depth grids and profile plots.

Attachments: 4 · Deadline: next review
LN

L. Ndlovu · Client Liaison

1 week ago

Permitting

The city review board requested additional documentation on the trench network outlet protection. They want a cross-section detail of the riprap apron and a maintenance access plan. I have the template from the last project — can you update the dimensions and send it over by Thursday?

Reference: PRJ-2024-089 · Due: Thursday
JT

J. Tshabalala · CAD Technician

2 weeks ago

Drafting

Finished the grading plan for the detention basin. The earthwork quantities show about 2,300 cubic yards of cut and 1,100 cubic yards of fill. I set the bottom elevation at 1,042.5 ft per the hydrology report. Let me know if you want to adjust the side slopes before I send it out for review.

File: BASIN-GRADING-03.dwg · Revision: B

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“Cityscmurrieta’s stormwater model for our new subdivision was spot-on. They predicted the exact flow paths during a 25-year event, which let us size the detention basin correctly. No surprises during construction.”

Riverside County Public Works

Senior Civil Engineer

“The gravity-fed trench network they designed eliminated chronic street flooding in our downtown corridor. Installation was straightforward, and the system handles heavy winter rains without any maintenance.”

City of Murrieta Engineering

Project Manager

“Their topographical survey using total stations was precise to within a quarter-inch. That level of accuracy saved us from redesigning a culvert alignment after we found a hidden ridge in their profile.”

San Diego Infrastructure Group

Lead Surveyor

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Scope and Limitations

The information, models, and design recommendations presented on this platform are intended for use by licensed civil engineers, hydrologists, and qualified infrastructure professionals. All stormwater runoff calculations, trench network designs, and topographical profiles are based on site-specific data and should not be applied to other locations without independent verification.

While we strive for accuracy in all published materials — including technical articles, case studies, and methodology guides — actual field conditions may vary. Factors such as unrecorded utility crossings, soil compaction differences, or changes in land use after survey completion can affect the performance of gravity-fed drainage systems. Users are responsible for conducting their own geotechnical investigations and obtaining necessary permits before construction.

Elevation data obtained via optical total stations is accurate to within the tolerances stated in each project report, but does not replace a registered land surveyor's certification for legal boundary or easement purposes. Our terrain models are engineering tools, not legal documents.

References to specific equipment brands, software packages, or regulatory standards are for illustrative purposes only and do not constitute endorsement. The authors and operators of Cityscmurrieta disclaim any liability for damages arising from the use or misuse of information contained herein.

For project-specific inquiries or to verify the applicability of any design method to your site, please contact our engineering team directly.

Last revised: March 2025. This document supersedes all previous versions.

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