diff --git a/go.mod b/go.mod
new file mode 100644
index 000000000..3eaa68381
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,5 @@
+module github.com/datacommonsorg/import
+
+go 1.22.3
+
+require google.golang.org/protobuf v1.36.6
diff --git a/go.sum b/go.sum
new file mode 100644
index 000000000..4665b5a0f
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,6 @@
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY=
+google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=
diff --git a/pipeline/model/src/main/proto/storage.pb.go b/pipeline/model/src/main/proto/storage.pb.go
new file mode 100644
index 000000000..76c05aad9
--- /dev/null
+++ b/pipeline/model/src/main/proto/storage.pb.go
@@ -0,0 +1,130 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.6
+// 	protoc        v5.29.3
+// source: pipeline/model/src/main/proto/storage.proto
+
+package storage
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// Observations represent the observations (time series) stored in the observations column in the Observation table.
+type Observations struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// Map from date to value.
+	// Examples: "2024" -> "123", "2025-05" -> "-456.78"
+	Values        map[string]string `protobuf:"bytes,1,rep,name=values,proto3" json:"values,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Observations) Reset() {
+	*x = Observations{}
+	mi := &file_pipeline_model_src_main_proto_storage_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Observations) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Observations) ProtoMessage() {}
+
+func (x *Observations) ProtoReflect() protoreflect.Message {
+	mi := &file_pipeline_model_src_main_proto_storage_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Observations.ProtoReflect.Descriptor instead.
+func (*Observations) Descriptor() ([]byte, []int) {
+	return file_pipeline_model_src_main_proto_storage_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Observations) GetValues() map[string]string {
+	if x != nil {
+		return x.Values
+	}
+	return nil
+}
+
+var File_pipeline_model_src_main_proto_storage_proto protoreflect.FileDescriptor
+
+const file_pipeline_model_src_main_proto_storage_proto_rawDesc = "" +
+	"\n" +
+	"+pipeline/model/src/main/proto/storage.proto\x12\x15org.datacommons.proto\"\x92\x01\n" +
+	"\fObservations\x12G\n" +
+	"\x06values\x18\x01 \x03(\v2/.org.datacommons.proto.Observations.ValuesEntryR\x06values\x1a9\n" +
+	"\vValuesEntry\x12\x10\n" +
+	"\x03key\x18\x01 \x01(\tR\x03key\x12\x14\n" +
+	"\x05value\x18\x02 \x01(\tR\x05value:\x028\x01BHZFgithub.com/datacommonsorg/import/pipeline/model/src/main/proto/storageb\x06proto3"
+
+var (
+	file_pipeline_model_src_main_proto_storage_proto_rawDescOnce sync.Once
+	file_pipeline_model_src_main_proto_storage_proto_rawDescData []byte
+)
+
+func file_pipeline_model_src_main_proto_storage_proto_rawDescGZIP() []byte {
+	file_pipeline_model_src_main_proto_storage_proto_rawDescOnce.Do(func() {
+		file_pipeline_model_src_main_proto_storage_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_pipeline_model_src_main_proto_storage_proto_rawDesc), len(file_pipeline_model_src_main_proto_storage_proto_rawDesc)))
+	})
+	return file_pipeline_model_src_main_proto_storage_proto_rawDescData
+}
+
+var file_pipeline_model_src_main_proto_storage_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_pipeline_model_src_main_proto_storage_proto_goTypes = []any{
+	(*Observations)(nil), // 0: org.datacommons.proto.Observations
+	nil,                  // 1: org.datacommons.proto.Observations.ValuesEntry
+}
+var file_pipeline_model_src_main_proto_storage_proto_depIdxs = []int32{
+	1, // 0: org.datacommons.proto.Observations.values:type_name -> org.datacommons.proto.Observations.ValuesEntry
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_pipeline_model_src_main_proto_storage_proto_init() }
+func file_pipeline_model_src_main_proto_storage_proto_init() {
+	if File_pipeline_model_src_main_proto_storage_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_pipeline_model_src_main_proto_storage_proto_rawDesc), len(file_pipeline_model_src_main_proto_storage_proto_rawDesc)),
+			NumEnums:      0,
+			NumMessages:   2,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_pipeline_model_src_main_proto_storage_proto_goTypes,
+		DependencyIndexes: file_pipeline_model_src_main_proto_storage_proto_depIdxs,
+		MessageInfos:      file_pipeline_model_src_main_proto_storage_proto_msgTypes,
+	}.Build()
+	File_pipeline_model_src_main_proto_storage_proto = out.File
+	file_pipeline_model_src_main_proto_storage_proto_goTypes = nil
+	file_pipeline_model_src_main_proto_storage_proto_depIdxs = nil
+}
diff --git a/pipeline/model/src/main/proto/storage.proto b/pipeline/model/src/main/proto/storage.proto
index f6a4db086..b2fae2670 100644
--- a/pipeline/model/src/main/proto/storage.proto
+++ b/pipeline/model/src/main/proto/storage.proto
@@ -2,6 +2,8 @@ syntax = "proto3";
 
 package org.datacommons.proto;
 
+option go_package = "github.com/datacommonsorg/import/pipeline/model/src/main/proto/storage"; 
+
 // Includes protos that are used in spanner storage.
 // The protos are typically gzipped and stored in a bytes column.