rfb 13304 for info only pothole report.pdf
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- Attached to
- RFB - PRESIOCA STREET SIDEWALK PROJECT
- Solicitation number
- BPM013304
- Issued by
- California
About this file
This is a potholing report prepared by AIRX Utility Surveyors, Inc. for the County of San Diego regarding underground utility location and excavation work on the Presioca Street Sidewalk Improvements project in Spring Valley, California. The report documents the results of vacuum excavation procedures performed to identify and map utilities at specified locations along Presioca Street and Birch Street. AIRX conducted a total of twelve pothole excavations between February 4 and February 12, 2026, to establish utility conflicts and connection points. The work involved marking utility locations with electronic locating devices, performing vacuum excavation using high-pressure air and water methods, and documenting utility depths, alignments, and materials. All excavations were completed without incident, with potholes backfilled with compacted material and cold mix patching applied to pavement surfaces. The report includes project maps, pothole location maps, a detailed tabulation report, and individual data sheets for each excavation point.
The potholing work identified multiple gas lines ranging from 0.75 to 2.0 inches in steel construction at depths between 28.0 and 41.5 inches, water service lines constructed of copper ranging from 1.0 inches in diameter, and main water lines of 6.0 to 8.0 inches in PVC material located at significantly greater depths of 51.5 to 57.5 inches on Birch Street. Subsurface materials encountered included subgrade sand conditions with asphalt pavement thicknesses ranging from 8.5 to 13.0 inches. AIRX recommends that all pothole locations and active markout be surveyed to facilitate proper utility adjustment on the final project plans and profiles. The report was prepared for Lawrence Hirsch at the County of San Diego and submitted from AIRX's office in San Marcos, California, documenting findings essential for the design and execution of the sidewalk improvement project.
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POTHOLING REPORT
County of San Diego
1600 Pacific Highway
San Diego, CA 92101
ATTN: Lawrence Hirsch
February 13, 2026
785 East Mission Road Ste. 100 I San Marcos, CA 92069 I P.760.480.2347 I F.760.739.8034 I airxus.com
Potholing Area:
Presioca St.
Spring Valley, CA
AIRX Project: #25-367 Presioca Street Sidewalk Improvements
TABLE OF CONTENTS
1. Description of Pothole Procedures and Site-Specific Details
2. Pothole Project Map (s)
3. Pothole Location Map (s)
4. Pothole Tabulation Report
5. Pothole Data Sheet (s)
AIRX UTILITY SURVEYORS, INC.
Description of
Pothole Procedures and
Site Specific Details
A I R X U T I L I T Y S U R V E Y O R S , I N C .
At the mark out area, utilities were marked with paint. AIRX used potable water acquired offsite for excavation and all water and material vacuumed was disposed of off-site. Water was not allowed to flow into storm drains or natural drainages. The potholes were covered with clean backfill material and compacted to 95% density in 3” lifts. The pavement was patched with Cold Mix. All field work for this project was performed on Wednesday, February 25, 2026.
DESCRIPTION OF LOCATING PROCEDURES
AIRX Utility Surveyors performs a full range of specialized engineering services including Underground Utility Location and Vacuum Excavation (to verify depth and alignment of underground utilities).
Underground Utility Location employs sophisticated electronic locating devices to trace the route of an underground utility;
then the route is marked on the surface with marking paint in paved areas, or with 60 penny nails and feathers in unpaved areas.
Vacuum excavation employs a vacuum truck in conjunction with high-pressure air or water to excavate material and expose an underground utility. A 12 inch square is cut through the pavement so that the vacuum hose and high-pressure air or water hose can be inserted.
Utilities found during potholing are located on the surface by placing two reference points (typically 36” apart) on either side of the pothole along the centerline (or edge) of the utility, using paving nails or 60 penny nails as appropriate. Depth measurements (to the nearest ½ inch) are taken midway between the two reference points. Utility alignment, depth, and other data is marked with pink paint (on pavement), or on wood lath (unpaved areas).
AirX was contracted by County of San Diego to perform potholing on Presioca St. Spring Valley, CA in . A total of 12 potholes were excavated to establish conflicts and connection points on a variety of utilities. The results of the data are contained in the attached spreadsheet and data sheets.
In preparation of these excavations, AIRX marked out the dig locations and called in for USA (Underground Service Alert).
SITE SPECIFIC DETAILS
All the excavations and discoveries went without any incident. Any changes and adjustments are mentioned in the Pothole Tabulation Report and the Pothole Data Sheets. All the results were annotated on the ground and in this report. It is AIRX’s recommendation that all pothole locations and the active mark out should be surveyed to aid in the adjustment of utilities on the final plan and profile.
AIRX UTILITY SURVEYORS, INC.
Pothole Project Map(s)
Pothole Project Map 1 25-367
Pothole Location Map(s)
Pothole Location Map 1 25-367
Pothole Tabulation Report
POT HOLE T AB ULA T ION R E POR T :
Pothole Number
Date Street Pavement Thickness
Utility Type Utility Size &
Material Soil Type
Depth-Ground to Top of Utility
Depth-Ground to Top of Package/
Encasement
Depth-Ground to Bottom of Package/
Encasement
Total Depth Excavated
Utility Direction
Project Area Map #
Location Map #
Notes
PH01 02/12/2026 Presioca St.
Asphalt - 12.0″ Concrete - N/A
Base - N/A Total - 12.0″
Gas 2.0″ Steel Subgrade, sand
41.0″ T/P N/A N/A 44.0” N/S 01 01
PH02 02/06/2026 Presioca St.
Asphalt - 12.0″ Concrete - N/A
Base - N/A Total - 12.0″
Gas Water Service
2.0″ Steel 1.0″ Copper Subgrade 41.5″ T/P
32.5″ T/P N/A N/A
N/A N/A 44.0” N/S
E/W 01 01
PH03 02/06/2026 Presioca St.
Asphalt - 13.0″ Concrete - N/A
Base - N/A Total - 13.0″
Gas Gas
2.0″ Steel 0.75″ Steel Subgrade 39.0″ T/P
40.0″ T/P N/A N/A
N/A N/A 47.0” E/W
N/S 01 01
PH04 02/12/2026 Presioca St.
Asphalt - 12.0″ Concrete - N/A
Base - N/A Total - 12.0″
Water Service Gas
1.0″ Copper 2.0″ Steel
Subgrade
28.0″ T/P 38.0″ T/P
N/A N/A
N/A N/A 41.0” E/W
N/S 01 01
PH05 02/04/2026 Presioca St.
Asphalt - 10.5″ Concrete - N/A
Base - N/A Total - 10.5″
Gas Gas
2.0″ Steel 0.75″ Steel Subgrade 38.0″ T/P
36.0″ T/P N/A N/A
N/A N/A 48.0” N/S
NW/SE 01 01
PH06 02/06/2026 Presioca St.
Asphalt - 8.5″ Concrete - N/A
Base - N/A Total - 8.5″
Gas Water Service
Gas
2.0″ Steel 1.0″ Copper 0.75″ Steel
Subgrade 39.0″ T/P 37.0″ T/P 39.0″ T/P
N/A N/A N/A
N/A N/A N/A
43.5” N/S E/W E/W
01 01
PH07 02/04/2026 Presioca St.
Asphalt - 11.0″ Concrete - N/A
Base - N/A Total - 11.0″
Gas Gas
2.0″ Steel 0.75″ Steel Subgrade 38.0″ T/P
35.5″ T/P N/A N/A
N/A N/A 47.0” N/S
E/W 01 01
PH08 02/04/2026 Presioca St.
Asphalt - 10.5″ Concrete - N/A
Base - N/A Total - 10.5″
Gas Water Service
2.0″ Steel 1.0″ Copper Subgrade 39.0″ T/P
41.0″ T/P N/A N/A
N/A N/A 43.0” N/S
E/W 01 01
PH09 02/04/2026 Presioca St.
Asphalt - 12.0″ Concrete - N/A
Base - N/A Total - 12.0″
Gas Gas
2.0″ Steel 0.75″ Steel Subgrade 38.5″ T/P
35.0″ T/P N/A N/A
N/A N/A 51.0” N/S
NW/SE 01 01
PH10 02/04/2026 Presioca St.
Asphalt - 8.5″ Concrete - N/A
Base - N/A Total - 8.5″
Gas Gas
2.0″ Steel 0.75″ Steel Subgrade 37.5″ T/P
34.0″ T/P N/A N/A
N/A N/A 46.0” N/S
E/W 01 01
PH11 02/12/2026 Birch St.
Asphalt - 9.0″ Concrete - N/A
Base - N/A Total - 9.0″
Water Water Service
6.0″ PVC
1.0″ Copper
Subgrade, Sand
51.5″ T/P 57.5″ T/P
N/A N/A
N/A N/A 67.0” N/S 01 01
PH12 02/12/2026 Birch St.
Asphalt - 9.0″ Concrete - N/A
Base - N/A Total - 9.0″
Water Water Service
8.0″ PVC
1.0″ Copper
Subgrade, Sand
51.5″ T/P 55.0″ T/P
N/A N/A
N/A N/A 61.0” E/W
N/S 01 01
Pothole Data Sheet(s)
Date 02/12/2026
Number PH01
Project: X25-367PS Spring Valley - Presioca Street Sidewalk Improvements - County of San Diego
Crew: Sal S. / Jose G.
Location: Presioca St, Spring Valley, CA 91977
Utility Owner Utility Type Standby Utility Material Utility Direction N/A Gas N/A Steel N/S
USA Markout Markout Correct Subsurface Material Pipe Cover Material ☑ Yes ☐ No ☑ Yes ☐ No Subgrade Subgrade, Sand
Asphalt: 12.0 Inches:
Concrete
N/A Inches:
Base: N/A Inches:
Top: 41.0 Inches:
Width: 2.0 Inches:
Bottom: N/A Inches:
Total Depth: 44.0 Inches
Notes:
Excavation Data
Number PH01
DOWNHOLE VIEW MARKOUT
NORTH EAST
SOUTH WEST
Excavation Photos
Date 02/06/2026
Number PH02
Crew: Bostyn P. / Juan F.
☑ Yes ☐ No ☑ Yes ☐ No Subgrade Black Wrap
Top: 41.5 Inches:
DOWNHOLE VIEW
Number PH02.2
N/A Water Service N/A Copper E/W
☑ Yes ☐ No ☑ Yes ☐ No Subgrade Subgrade
Top: 32.5 Inches:
Width: 1.0 Inches:
Number PH02
Number PH03
N/A Gas N/A Steel E/W
Asphalt: 13.0 Inches:
Top: 39.0 Inches:
Total Depth: 47.0 Inches
Number PH03.2
Asphalt: 13.0 Inches:
Top: 40.0 Inches:
Width: .75 Inches:
Number PH03
Number PH04
☑ Yes ☐ No ☑ Yes ☐ No Subgrade, Sand Subgrade, Sand
Top: 28.0 Inches:
Total Depth: 41.0 Inches
Number PH04.2
Top: 38.0 Inches:
Total Depth: 41.0 Inches
Number PH04
Date 02/04/2026
Number PH05
Asphalt: 10.5 Inches:
Total Depth: 48.0 Inches
Number PH05.2
N/A Gas N/A Steel NW/SE
Top: 36.0 Inches:
Total Depth: 48.0 Inches
Number PH05
Number PH06
Asphalt: 8.5 Inches:
Total Depth: 43.5 Inches
Number PH06.2
Top: 37.0 Inches:
Number PH06.3
Number PH06
Number PH07
Asphalt: 11.0 Inches:
Number PH07.2
Asphalt: 11.0 Inches:
Top: 35.5 Inches:
Number PH07
Number PH08
Total Depth: 43.0 Inches
Number PH08.2
Top: 41.0 Inches:
Total Depth: 43.0 Inches
Number PH08
Number PH09
Top: 38.5 Inches:
Total Depth: 51.0 Inches
Number PH09.2
N/A Gas N/A Steel NW/SE
☑ Yes ☐ No ☐ Yes ☑ No Subgrade Black Wrap
Top: 35.0 Inches:
Total Depth: 51.0 Inches
Number PH09
Number PH10
Top: 37.5 Inches:
Total Depth: 46.0 Inches
Number PH10.2
Top: 34.0 Inches:
Total Depth: 46.0 Inches
Number PH10
Number PH11
Location: Birch St, Spring Valley, CA 91977
N/A Water N/A PVC N/S
Asphalt: 9.0 Inches:
Top: 51.5 Inches:
Width: 6.0 Inches:
Total Depth: 67.0 Inches
Number PH11.2
N/A Water Service N/A Copper N/S
Top: 57.5 Inches:
Total Depth: 67.0 Inches
Number PH11
Number PH12
Project: X25-367PS Spring Valley - Presioca Street Sidewalk Improvements - County of San Diego
Crew: Sal S. / Jose G.
Location: Birch St, Spring Valley, CA 91977
Utility Owner Utility Type Standby Utility Material Utility Direction N/A Water N/A PVC E/W
USA Markout Markout Correct Subsurface Material Pipe Cover Material ☑ Yes ☐ No ☑ Yes ☐ No Subgrade, Sand Subgrade, Sand
Asphalt: 9.0 Inches:
Concrete N/A Inches:
Base: N/A Inches:
Top: 51.5 Inches:
Width: 8.0 Inches:
Total Depth: 61.0 Inches
Number PH12.2
N/A Water Service N/A Copper N/S
☑ Yes ☐ No ☑ Yes ☐ No Subgrade, Sand Sand, Subgrade
Top: 55.0 Inches:
Total Depth: 61.0 Inches
Number PH12
| Report Cover |
| T.O.C. |
| Report Body |
| Project Map |
| Pothole Map |
File details come from the government source that posted it. Updated .