diff --git a/scripts/mssql-copy-in/main.go b/scripts/mssql-copy-in/main.go
index a913904..eafaa3e 100644
--- a/scripts/mssql-copy-in/main.go
+++ b/scripts/mssql-copy-in/main.go
@@ -12,9 +12,10 @@ import (
 )
 
 const (
-	totalRows int    = 1_000_000
-	chunkSize int    = 50_000
-	queueSize int    = 4
+	// totalRows int = 1_000_000
+	totalRows int = 10_000
+	chunkSize int = 50_000
+	queueSize int = 4
 )
 
 func main() {
@@ -40,6 +41,14 @@ func main() {
 		seedManzanas(ctx, db)
 	})
 
+	wgSeed.Go(func() {
+		seedPuertos(ctx, db)
+	})
+
+	wgSeed.Go(func() {
+		seedSiteHolderAttach(ctx, db)
+	})
+
 	wgSeed.Wait()
 }
 
diff --git a/scripts/mssql-copy-in/site-holder-attach.go b/scripts/mssql-copy-in/site-holder-attach.go
new file mode 100644
index 0000000..1283f64
--- /dev/null
+++ b/scripts/mssql-copy-in/site-holder-attach.go
@@ -0,0 +1,227 @@
+package main
+
+import (
+	"bytes"
+	"context"
+	"database/sql"
+	"fmt"
+	"math/rand"
+	"sync"
+	"time"
+
+	"github.com/google/uuid"
+	log "github.com/sirupsen/logrus"
+)
+
+var siteHolderAttachJob = MigrationJob{
+	Schema: "Infraestructura",
+	Table:  "SITE_HOLDER__ATTACH",
+}
+
+func seedSiteHolderAttach(ctx context.Context, db *sql.DB) error {
+	maxOid, err := getMaxGDBArchiveOidForAttach(ctx, db)
+	if err != nil {
+		log.Fatal("Error getting max GDB_ARCHIVE_OID: ", err)
+	}
+
+	log.Infof("Starting SITE_HOLDER__ATTACH data generation from GDB_ARCHIVE_OID: %d", maxOid+1)
+
+	rowsChan := make(chan []UnknownRowValues, queueSize)
+
+	var wgRowGenerator sync.WaitGroup
+
+	wgRowGenerator.Go(func() {
+		generateSiteHolderAttachRows(ctx, maxOid, totalRows, chunkSize, rowsChan)
+	})
+
+	columns := []string{
+		"GDB_ARCHIVE_OID",
+		"REL_GLOBALID",
+		"CONTENT_TYPE",
+		"ATT_NAME",
+		"DATA_SIZE",
+		"DATA",
+		"GLOBALID",
+		"GDB_FROM_DATE",
+		"GDB_TO_DATE",
+		"ATTACHMENTID",
+	}
+
+	if err := loadRowsMssql(ctx, siteHolderAttachJob, columns, db, rowsChan); err != nil {
+		return fmt.Errorf("Error loading rows (SITE_HOLDER__ATTACH): %w", err)
+	}
+
+	log.Info("Data generation and loading completed successfully (SITE_HOLDER__ATTACH)")
+	wgRowGenerator.Wait()
+
+	return nil
+}
+
+func getMaxGDBArchiveOidForAttach(ctx context.Context, db *sql.DB) (int, error) {
+	var maxOid sql.NullInt64
+
+	query := fmt.Sprintf(`
+		SELECT ISNULL(MAX(GDB_ARCHIVE_OID), 0)
+		FROM [%s].[%s]
+	`, siteHolderAttachJob.Schema, siteHolderAttachJob.Table)
+
+	err := db.QueryRowContext(ctx, query).Scan(&maxOid)
+	if err != nil && err != sql.ErrNoRows {
+		return 0, err
+	}
+
+	if !maxOid.Valid {
+		return 0, nil
+	}
+
+	return int(maxOid.Int64), nil
+}
+
+func generateSiteHolderAttachRows(
+	ctx context.Context,
+	startOid int,
+	totalRows int,
+	chunkSize int,
+	out chan<- []UnknownRowValues,
+) {
+	defer close(out)
+
+	rowsGenerated := 0
+	currentChunk := make([]UnknownRowValues, 0, chunkSize)
+
+	for i := range totalRows {
+		gdbArchiveOid := startOid + i + 1
+		row := generateSiteHolderAttachRow(gdbArchiveOid)
+		currentChunk = append(currentChunk, row)
+		rowsGenerated++
+
+		if len(currentChunk) == chunkSize {
+			select {
+			case out <- currentChunk:
+				log.Debugf("Sent SITE_HOLDER__ATTACH chunk with %d rows", len(currentChunk))
+			case <-ctx.Done():
+				log.Info("Context cancelled, stopping SITE_HOLDER__ATTACH row generation")
+				return
+			}
+			currentChunk = make([]UnknownRowValues, 0, chunkSize)
+		}
+
+		if rowsGenerated%100_000 == 0 {
+			logSiteHolderAttachSampleRow(rowsGenerated, row)
+		}
+	}
+
+	if len(currentChunk) > 0 {
+		select {
+		case out <- currentChunk:
+			log.Debugf("Sent final SITE_HOLDER__ATTACH chunk with %d rows", len(currentChunk))
+		case <-ctx.Done():
+			log.Info("Context cancelled, stopping SITE_HOLDER__ATTACH row generation")
+		}
+	}
+
+	log.Infof("Finished generating %d SITE_HOLDER__ATTACH rows", rowsGenerated)
+}
+
+func generateSiteHolderAttachRow(gdbArchiveOid int) UnknownRowValues {
+	dateLowerLimit, _ := time.Parse(time.RFC3339, "2020-12-31T23:59:59Z")
+	dateUpperLimit, _ := time.Parse(time.RFC3339, "2025-12-31T23:59:59Z")
+
+	relGlobalID, _ := uuid.New().MarshalBinary()
+	contentType := generateRandomContentType()
+	attName := generateRandomAttachmentName()
+	binaryData := generateRandomBinaryContent()
+	dataSize := len(binaryData)
+	globalID, _ := uuid.New().MarshalBinary()
+	gdbFromDate := generateRandomTimestamp(dateLowerLimit, dateUpperLimit)
+	gdbToDate, _ := time.Parse(time.RFC3339, "9999-12-31T23:59:59Z")
+	attachmentID := rand.Intn(10000) + 1
+
+	return UnknownRowValues{
+		gdbArchiveOid,
+		relGlobalID,
+		contentType,
+		attName,
+		dataSize,
+		binaryData,
+		globalID,
+		gdbFromDate,
+		gdbToDate,
+		attachmentID,
+	}
+}
+
+func generateRandomContentType() string {
+	contentTypes := []string{
+		"text/plain",
+		"application/pdf",
+		"image/jpeg",
+		"image/png",
+		"application/msword",
+		"application/vnd.openxmlformats-officedocument.wordprocessingml.document",
+		"text/csv",
+		"application/json",
+	}
+	return contentTypes[rand.Intn(len(contentTypes))]
+}
+
+func generateRandomAttachmentName() string {
+	extensions := []string{".txt", ".pdf", ".jpg", ".png", ".doc", ".docx", ".csv", ".json"}
+	baseName := generateRandomString(20)
+	extension := extensions[rand.Intn(len(extensions))]
+	return baseName + extension
+}
+
+func generateRandomBinaryContent() []byte {
+	sizeOptions := []int{100, 500, 1000, 5000, 10000, 50000, 100000}
+	size := sizeOptions[rand.Intn(len(sizeOptions))]
+
+	var buf bytes.Buffer
+
+	lineCount := rand.Intn(size/50) + 1
+	for range lineCount {
+		line := generateRandomString(rand.Intn(80) + 20)
+		buf.WriteString(line)
+		buf.WriteString("\n")
+	}
+
+	for buf.Len() < size {
+		randomText := generateRandomString(rand.Intn(100) + 50)
+		buf.WriteString(randomText)
+		buf.WriteString("\n")
+	}
+
+	result := buf.Bytes()
+	if len(result) > size {
+		result = result[:size]
+	}
+
+	return result
+}
+
+func logSiteHolderAttachSampleRow(id int, rowValues UnknownRowValues) {
+	dataBytes := rowValues[5].([]byte)
+	log.Infof(`
+Sample SITE_HOLDER__ATTACH row #%d:
+GDB_ARCHIVE_OID: %v
+REL_GLOBALID: [binary UUID]
+CONTENT_TYPE: %v
+ATT_NAME: %v
+DATA_SIZE: %v
+DATA: [%d bytes of binary content]
+GLOBALID: [binary UUID]
+GDB_FROM_DATE: %v
+GDB_TO_DATE: %v
+ATTACHMENTID: %v
+`,
+		id,
+		rowValues[0],
+		rowValues[2],
+		rowValues[3],
+		rowValues[4],
+		len(dataBytes),
+		rowValues[7],
+		rowValues[8],
+		rowValues[9],
+	)
+}