HomeMy WebLinkAboutCT 2018-0006; LAGUNA DRIVE SUBDIVISION; Negative Paleontological Monitoring and Mitigation Report; 2021-11-10A, !!!!5 !!!!r !!!!ia!!!!n!!!!F:!!!!.!!!!S!!!!m!!!!!!!!it!!!!h!!!!a!!!!n!!!!d !!!!As!!!!!!!!!!!!so!!!!c!!!!i!!!!a !!!!te!!!!s!!!!!!,!!!!l !!!!nc!!!!.~!!\!!!!!!!!!!!!!~!!!!!!!!!!!!!!!!!!!!!!!!~!!!!!!!!!!!!!!!!!!!!!!!!!!!!!~!!!!!!!!~!!!!!!!!!!!!!!!!!!!!!!! S ArchaeoloS!} I BiofOS!J I Hist:ory I Pafeont:ofoS!j I Air Quality/ TraFFic / Acoustics
November JO, 2021
Brett Farrow
125 Mozart A venue
Cardiff, California 92007
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Nov 15 2021
CITY u
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Subject: Negative Paleontological Monitoring and Mitigation Report for the Laguna Drive
Subdivision Project, 570 and 580 Laguna Drive, Carlsbad, California (CT 20 L 8-0006 /
RP 2018-0008 I CDP 2018-0032 / HDP 2018-0003 / HMP 2018-0003)
Dear Mr. Farrow:
Introduction and Location: The following letter report summarizes the results of the
paleontological monitoring program conducted in response to the City of Carlsbad's
environmental mitigation requirements for paleontological monitoring of grading and excavation
activities for the Laguna Drive Subdivision Project, located at 570 and 580 Laguna Drive in
Carlsbad, California (Figures l and 2). The 0. 75-acre project proposes 13 "detached" three-story
condominium units on one parcel (Assessor's Parcel Number 155-221-12), consisting of 282 cubic
yards of fi ll with 6 18 cubic yards of cut.
Geology and Paleontology: On the geologic map by M.P. Kennedy and S.S. Tan (Figure 3, 2007,
Geologic map of the Oceanside 30' x 60' quadrangle, California: California Geological Survey,
Regional Geologic Map Series, I: I 00,000 Scale, Map no. 2, plate I of 2), the project area is
mapped as being underlain by upper Pleistocene-aged paralic deposits (labeled as "Qop6-1," shown
in yellowish gray on Figure 3). Pleistocene paralic (terrace) deposits have been assigned a
moderate to high paleontological resource sensitivity by T.A. Demere and S.L. Walsh (I 993,
Paleontological resources -County of San Diego) and the County of San Diego (R.A. Stephenson
et al. 2009, County of San Diego guidelines for determining significance [of] paleontological
resources) for their proven potential to yield the fossilized remains of past life.
Monitoring and Results: Paleontological monitoring of was conducted intermittently from August
26, 2020 through October 26, 2021. Despite the potential for find ing invertebrate or vertebrate
fossils, no foss ils of any sort were observed in any of the excavations, slopes, or sidewall cuts, nor
in any of the spoil piles generated by these excavation activities.
11-010 Fbwa_y Rood, Suite A, Powa_y, CA 92o6+; Phone (8'8) 679-82.18 or <9.,1) 681-n,<l; rax (8'8) 679-9896; www.bf5a-ca.com
~ineM offic,,, 1+678 ibex Court, San Diego, CA 92129; Phone (8,S) +s+-091,; rax (8'8) +B+-0988
Thus, based on this investigation, no significant paleontological resources are regarded as
having been lost or otherwise adversely affected by excavation activities related to construction of
the Laguna Drive Subdivision Project, and the City of Carlsbad's mitigation requirements for
preserving significant paleontological resources (Mitigation Measure CUL-2) are considered to
have been satisfactorily completed. ,N,'l.l
Sincerely,
;;z~ ~ ', .• .··.~::'~:l
Todd A. Wirths, M.S., P.G. 7588 ----0
Senior Paleontologist, California Professional Geo og1
Attachments: Figures 1 to 3
Figure 1
General Location Map
The Laguna Drive Subdivision Project
DeLorme (1 :250,000)
,...._____,....,
0 5001n
0 1000 2000 ft
Figure 2
Project Location Map
The Laguna Drive Subdivision Project
USGS San Luis Rey Quadrangle (7.5-minute series)
....
,___._,..-r,i
0 500 Ill
Figure 3
Geologic Map
The Laguna Drive Subdivision Project
Geology after Kennedy and Tan (2007)