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Hunterwood Park-CS100202Page 1 of 1 Keith Marvin - Hunterwood Park Inspection 02 -01 -10 From: "Clark, Joel" <jclark(�'.&raigoldeninc.com> To: <jelias(�'.&i.coppell.tx.us> Date: 2/2/2010 12:03 PM Subject: Hunterwood Park Inspection 02 -01 -10 CC: "Keith Marvin" <KMARVINgci.coppell.tx.us >, <kwhitisgpkce.com >, "James Graeber" <pgraebergsbcglobal.net> Attachments: Hunterwood Inspection Report 02 -01 -1 O.pdf John — attached is the report for yesterday's site inspection. Please call with any questions or concerns. Thanks. -Joel This e -mail (including any attachments to it) is intended solely for the use of the individual(s) or entity named above. It may contain confidential or privileged information. If you are not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately and delete the original message. file: HC: \Documents and Settings \radloo \Local Settings\ Temp \XPgrpwise \4B68149FCity_o... 9/13/2010 OLDEN Craig Olden, Inc. February 2, 2010 Mr. John Elias City of Coppell Parks and Recreation Dept 255 Parkway Boulevard Coppell, Texas 75019 jelias @ci.coppell.tx.us Re: Hunterwood Park Improvements / Project D08710 Report of 02 -01 -10 Site Inspection U1 We performed an inspection of the initial stages of rock riprap and gabion installation at 11:00 a.m. on February 1, 2010. Our observations and discussions with Payton Graeber of Utz Environmental were as U) follows: V) L 1. The test section of 12" x 18" rock riprap was installed at the upstream limits of Area 1. The gradation and placement of the test section appeared to be sufficient and performed well during last week's storm event. I informed Mr. Graeber that the 12" x 18" gradation will be sufficient for L the remaining portion of the channel lining. Care should be taken to provide the minimum rock layer thickness with sufficient hand manipulation to "lock in" the rocks and minimize voids for the remainder of the rock riprap placement. At our request, a truckload of 18" x 24" rock had been 4A delivered the site to inspect it for suitability for the channel lining. The upper end of this rock was Zi too large for use in the channel; therefore, I recommended that it be placed to protect the N CO upstream return of the gabion wall at Area 1. v .0 0 2. The geotextile was being placed on the retained backfill side of the crushed stone filter material behind the gabions rather than directly behind the gabions (per plan) on the upstream 3' x 3' base course at Area 1. Mr. Graeber had the crews remove and reinstall the geotextile at the proper location. I instructed Mr. Graeber that the remaining geotextile needed to be turned underneath the base course of gabions 6" to 12" minimum and continued up along the back side of the 1Z gabions. 3. The 12" granular filter media being used behind the base course of gabions is not in conformance cc with Item 2.4, Sheet EC1.4 — granular filter media which calls for 1" minus crushed limestone in = conformance with ASTM C33, Size 57. The material being used appeared to be flex base material with too many fines for the intended application. This material should be removed and replaced = with the crushed limestone. W 4. Removal of trees and subsequent sloughing of the embankment at the upstream end of Area 1 has created a sizeable void that will require backfilling behind the gabion wall. The material that sloughed was being stockpiled in the park. I discussed with Mr. Graeber that the material is currently too far above optimum moisture to be used as backfill; therefore, a sandy clay (CL) material should be imported, placed and compacted in accordance with Item 2.5, Sheet EC1.4. We recommend density testing of the backfill be performed at a minimum frequency of once for every 25 feet of wall for every three feet of fill (i.e., at the top of each course of 3' x 3' gabions). Due to the concavity of the upper bank at the bend in the creek at Area 2, Mr. Graeber requested substitution of crushed stone for the wall backfill material. We agree that the crushed stone backfill will facilitate placement of the backfill without requiring compaction around the exposed tree roots and underneath the projecting upper bank. The backfill material should be the same 1" minus crushed limestone specified for the granular filter media. An 18" minimum compacted clay cap should be placed behind the wall above the crushed stone backfill. P.O. Box 5000, Little Elm,TX 75068 • 972.294.5000 • 1.800.422.4667 • Fax 972.294.2664 • www.oldeninc.com We plan on performing a second inspection toward the end of this week or early next week. We will inform everyone of the date and time prior to the inspection. Sincerely, CRAIG OLDEN, INC. Texas Engineering Firm No. F -10869 / JOEL R I . ..:................. ••: -• 854 �'�• r �l; O,� ��CENS��•G��i �l� S SIONA�•�� = Joel R. Clark, P.E. 07 cc: Keith Marvin, P.E. — City of Coppell Kyle Whitis, P.E. — Pacheco Koch Consulting Engineers Payton Graeber — Utz Environmental Page 1 of 1 Keith Marvin - Hunterwood Pocket Park - Construction Observation Report - 02 -02 -10 From: "Kyle Whitis" <kwhitis(�pkce.com> To: "John Elias" <jelias(�'.&i.coppell.tx.us> Date: 2/2/2010 10:24 AM Subject: Hunterwood Pocket Park - Construction Observation Report - 02 -02 -10 CC: "Keith Marvin" <KMARVINgci.coppell.tx.us >, "Bryan Padgham" <bryan.padghamgtbg- inc.com >, "Jim Koch" <jkochgpkce.com> Attachments: Hunterwood Pocket Park - Construction Observation Report - 02 -01 -1 O.pdf Mr. Elias, Attached is a Construction Observation Report for my site visit yesterday in order to review Utz's Payment Application #1. 1 signed off on the Pay Ap and hand delievered it to your office late yesterday afternoon. Please review at your convenience and please let me know if you have any questions or need anything at all. Kyle F. Whitis, P.E., LEED AP Senior Project Manager ,a Pachmm Koch Mus - sm Wom - HOLIRON 8350 N. Central Expwy, Suite 1000 Dallas, Texas 75206 -1 61 2 P: 972.235.3031 1 F: 972.235.9544 file: HC: \Documents and Settings \radloo \Local Setting s\Temp\XPgrpwi se\4B 6 7FD 5 0 City_... 9/16/2010 Pacheco Koch Consulting Engineers— CONSTRUCTION OBSERVATION REPORT Project: Hunterwood Pocket Park PK No.: 2052- 09.127 Coppell, Texas Date: February 1, 2010 Weather. Cloudy, 50 Time: Arrived — 4:00 p.m. Present at Site: Utz Environmental Services Departed — 4:30 p.m. Workers Kyle F. Whitis Kyle F. Whitis (Pacheco Koch Consulting Engineers) visited the site to review the status of the project. During the site visit, the following observations were made: 1. Park is closed to the public due to construction activities and security fence has been installed. 2. Rock Check Dams and Silt Fence have been installed. 3. Construction stakes have been set for the gabion and rip -rap installation in Areas #1 and #2. 4. Area #1 Rock Gabion installation has begun. Some rock rip -rap has been installed along channel bottom. A rock check dam upstream of the existing wood bridge is backing up water in order to bypass storm water from working area by way of pump. 5. Several trees in and around the working areas have been removed. 6. Area #2 has had trees cleared for the gabion installation, but no construction activities have commenced. Kyfe F. Whitis, P.E., LEED AP KFW /anw 2052 -468 cc: John Elias — City of Coppell Bryan Padgham — TBG Partners