ADDENDUM_3_CD_304_2202_L117_GRAD_3.pdf
PDF 833 KB Posted
- Attached to
- Sheraden Park Phase 1 Construction
- Solicitation number
- 2026-IFB-152
- Issued by
- Allegheny County, Pennsylvania
About this file
This is Addendum 3 to the Site Grading Plan (Sheet L117) for Sheraden Park Phase 1 Construction, prepared by Fahringer, McCArty, Grey, Inc. for the City of Pittsburgh Department of Public Works. The addendum provides detailed grading specifications and site preparation requirements for Area 3 of the park improvements located at 701 Thornton Street. The scope includes earthwork with an overall cut volume of 3,500 cubic yards (maximum cut depth of 4.25 feet) and fill volume of 2,000 cubic yards (maximum fill depth of 3.00 feet). Key construction requirements include removal of topsoil and deleterious materials around parking areas, proof-rolling of exposed subgrades with a minimum of ten passes using a vibratory roller compactor, stabilization of soft zones with AASHTO No. 1 crushed stone, and compaction specifications for both cohesive and granular fill materials. Finished slopes must comply with maximum ratios of 1.5:1 for cut slopes and 2:1 for fill slopes, with steep slopes exceeding 25 percent stabilized through vegetation and plantings as specified in drawings L120-L124.
The addendum establishes contractor responsibilities for locating and protecting all underground utilities, verifying existing field conditions prior to construction, and reporting any discrepancies in the site survey to the owner and landscape architect. The contractor must fine-grade all disturbed beds and planting areas in preparation for landscape installation and ensure proper transitions where new paving or earthwork meets existing surfaces. Additional specifications address inlet maintenance to prevent sediment or debris obstruction, sawcutting of existing curbing and pavements to clean edges where they abut new construction, and protection of excavated materials through either prompt placement and compaction or coverage with plastic tarps if installation extends multiple days. The geotech engineer has identified erosion and elevated soil moisture conditions as present hazards requiring the specified fill and grading countermeasures to ensure long-term performance of proposed park features.
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Text version
2:1 SLOPE
12.5%
'-4
98'
60'
±2 3'
-1 0"
±7'
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10'
10'
'-4
EXISTING 1' CONTOUR
PROPOSED 1' CONTOUR
PROPOSED 5' CONTOUR
FFE FIRST FLOOR ELEVATION
BW BOTTOM OF WALL
TW TOP OF WALL
SPOT ELEVATION
EXISTING 5' CONTOUR
PERCENT SLOPE5%
+790.5
CB CATCH BASIN
BC BOTTOM OF CURB
TC TOP OF CURB
LP LOW POINT
ACCESSIBLE PATH
DEMOLITION CONTOUR
1. DRAWINGS GENERATED BASED ON SURVEY
PREPARED BY TRI-STATE DESIGN AND
DEVELOPMENT DATED FEBRUARY 8, 2023;
ADDITIONAL SURVEY INFORMATION PROVIDED
ON SEPTEMBER 05, 2023.
2. PRIOR TO CONSTRUCTION, THE CONTRACTOR IS
RESPONSIBLE FOR LOCATING ALL UNDER-
GROUND UTILITIES AND SHALL AVOID DAMAGE
TO ALL UTILITIES DURING INSTALLATION. THE
CONTRACTOR IS RESPONSIBLE FOR REPAIRING
ALL DAMAGE TO UTILITIES, STRUCTURES, SITE
APPURTENANCES, ETC., WHICH MAY OCCUR AS A
RESULT OF CONSTRUCTION.
4. KLAVON DESIGN IS RESPONSIBLE FOR APPLYING
FOR ALL PARENT PERMITS NECESSARY TO
INITIATE THE WORK. CONTRACTOR IS
RESPONSIBLE FOR PICKING UP ALL PARENT
PERMITS AND APPLYING FOR ALL SUBSEQUENT
PERMITS NECESSARY TO COMPLETE THE WORK.
5. INLETS SHALL BE MAINTAINED SO AS NOT TO
ALLOW ANY SEDIMENT OR DEBRIS TO PREVENT
THE FLOW OF WATER INTO THE INLETS. ANY
OBSTRUCTIONS TO THE PIPE SHOULD BE
REMOVED.
6. CONTRACTOR SHALL VERIFY ALL EXISTING
CONDITIONS IN THE FIELD AND REPORT ANY
DISCREPANCIES IN THE SITE SURVEY TO THE
OWNER AND/OR LANDSCAPE ARCHITECT PRIOR
TO STARTING ANY WORK
7. AT ALL LOCATIONS WHERE EXISTING CURBING,
ASPHALT, CONCRETE ROADWAY OR CONCRETE
SIDEWALK ABUT NEW CONSTRUCTION, THE EDGE
OF THE EXISTING CURB OR PAVEMENTS SHALL
BE SAWCUT TO A CLEAN, SMOOTH EDGE.
8. WHERE NEW PAVING OR EARTHWORK MEETS
EXISTING PAVING OR EARTHWORK SMOOTHLY
BLEND LINE AND GRADE OF EXISTING WITH NEW.
9. GENERAL CONTRACTOR TO FINE GRADE ALL
DISTURBED BEDS & PLANTING AREAS IN
PREPARATION FOR LANDSCAPE CONTRACTOR.
10. REFER TO SPECIFICATIONS FOR SITE MATERIAL
SELECTIONS.
SHEET NUMBER
SHEET TITLE
DRAWN BY: ARG
PROJECT
DATE
NOTES
2026.01.15
OWNER
414 Grant Street, Room 301 Pittsburgh, PA 15219
PE
R
M
IT
D O
C U
M
EN
TS
.0 2.
CHECKED BY: RAW
SCALE:
Sheraden Park Phase I Improvements City of Pittsburgh, Allegheny County
PROFESSIONAL SEAL
CIVIL ENGINEER
FAHRINGER, McCARTY, GREY, INC.
1610 GOLDEN MILE HIGHWAY
MONROEVILLE, PA 15146
P 724.327.0599
CONTACT: JON SWERIGEN, RLA
JSWERINGEN@FMGINC.US
ELECTRICAL ENGINEER
SANTANGELO & LINDSAY, INC.
732 THIRD AVENUE, SUITE 102
NEW BRIGHTON, PA 15066
P 724.847.0407
CONTACT: CHRISELLEN LINDSAY, P.E.
CLINDSAY@SANTANGELOLINDSAY.COM
LANDSCAPE ARCHITECT
KLAVON DESIGN ASSOCIATES, INC.
64 S 14TH STREET
PITTSBURGH, PA 15203
P 412.394.1181
CONTACT: RACHELLE WOLF
RWOLF@KLAVONDESIGN.COM
THE GATEWAY ENGINEERS, INC.
100 MCMORRIS ROAD
PITTSBURGH, PA 15205
P 855-634-9284
CONTACT: NATHANIEL S. HAYES, PE
NHAYES@GATEWAYENGINEERS.COM
GEOTECH ENGINEER
1"=20'
Site Grading Plan - Area 3
L117
SURBAN STREET
SEE SHEET L116
L117
SITE GRADING PLAN - AREA 3
SCALE: 1" = 20'
NORTH
0' 10' 20' 40'
GRAPHIC SCALE
KEY PLAN NORTH
LEGEND
SE
E
SH
EE
T L1
NOTES
PARKING LOT
STABILIZE WITH STEEP
SLOPE SEED MIX, TYP.
L122
GRADING NOTES (CITY OF PITTSBURGH)
EROSION AND ELEVATED SOIL MOISTURE CONDITIONS ARE PRESENT AND WILL IMPACT THE
LONG-TERM PERFORMANCE OF THE PROPOSED PARK FEATURES. REVIEW THE FOLLOWING FOR
COUNTERMEASURES TO THE GEO-HAZARDS DESCRIBED ABOVE:
1. FILL/BACKFILL CONSIDERATIONS
1.1. GRADING AROUND THE BASKETBALL PARKING LOT AND THE NEW ADA ACCESSIBLE
PARKING STALLS, ALL TOPSOIL, VEGETATION, AND OTHER DELETERIOUS MATERIALS
SHOULD BE REMOVED.
1.2. EXPOSED SUBGRADES SHOULD BE PROOF-ROLLED WITH A MINIMUM OF TEN (10) PASSES
WITH A WALK-BEHIND (STATIC WEIGHT) VIBRATORY ROLLER COMPACTOR.
1.3. SOFT OR LOOSE ZONES DELINEATED BY THE PROOF-ROLLING SHOULD BE UNDERCUT AN
ADDITIONAL FOOT BELOW THE FINAL RESPECTIVE SUBGRADE LEVEL.
1.4. SHOULD THE UNDERCUT SUBGRADE REMAIN UNSUITABLE, IT SHOULD BE STABILIZED BY
'PUNCHING' SUITABLE, INERT (NON-CARBONACEOUS, NON-PYRITIFEROUS,
NON-EXPANSIVE, AND NON-SLAG) CRUSHED STONE MEETING THE SIZE AND GRADING
REQUIREMENTS OF AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION
OFFICIALS (AASHTO) NO. 1 INTO IT TO CREATE AN ADEQUATE "WORKING SURFACE".
1.5. EXCAVATED MATERIAL TO BE USED AS BACKFILL SHALL BE EITHER PLACED AND
COMPACTED IN THE WORK AREA AS SOON AS POSSIBLE TO LIMIT ITS EXPOSURE TO
RAINFALL EVENTS, OR PROTECTED WITH PLASTIC TARPS IF INSTALLATION REQUIRES
MULTIPLE DAYS.
1.6. COHESIVE FILL SHOULD BE COMPACTED TO A MINIMUM OF 95 PERCENT OF THE MAXIMUM
STANDARD PROCTOR DRY DENSITY AS DETERMINED BY ASTM TEST DESIGNATION D698,
AT WATER CONTENTS WITHIN THREE PERCENT (±3%) OF THE OPTIMUM WATER CONTENT
ESTABLISHED BY THAT TEST.
1.7. GRANULAR FILL SHOULD BE COMPACTED TO AT LEAST 70 PERCENT RELATIVE DENSITY AS
DETERMINED BY ASTM TEST DESIGNATIONS D4253 AND 4254-16.
2. STEEP SLOPES (EXCEEDING 25%) SHALL BE STABILIZED BY VEGETATION/PLANTINGS AS
SPECIFIED ON DRAWINGS L120 - L124.
2.1. FINISHED SLOPES SHALL COMPLY WITH THE FOLLOWING MAXIMUM RATIOS:
2.1.1. CUT SLOPES: 1.5:1 (HORIZONTAL TO VERTICAL)
2.1.2. FILL SLOPES: 2:1 (HORIZONTAL TO VERTICAL)
3. ROUGH ORDER OF MAGNITUDE (ROM) FOR GRADING SITE-WIDE:
3.1. OVERALL CUT VOLUME: 3,500 CY
3.2. MAX. CUT DEPTH: 4.25 FT
3.2. OVERALL FILL VOLUME: 2,000 CY
3.3. MAX. FILL DEPTH: 3.00 FT
2026-08-26 Addendum 3 - Ex. Contours3
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| Sheets and Views |
| L117 GRAD 3 |
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